LIVIVO - Search results -

Search results

Result 1 - 10 of total 14

Search options

Article ; Online: Preparation of phosphorus-doped chitosan derivative and its applications in polylactic acid: Crystallization, flame retardancy, anti-dripping and mechanical properties.

Liu, Liyan / Wang, Yadong / Cheng, Chunzu / Lyu, Shisheng / Zhu, Zongmin

International journal of biological macromolecules

2024 Volume 265, Issue Pt 1, Page(s) 130648

Abstract: The topic of biobased flame-retardant PLA has always been of great interest. In our study, we successfully synthesized a phosphorus-containing chitosan derivative (PCS) and combined it with aluminum hypophosphate (AP) to create an effective flame- ... ...

Abstract	The topic of biobased flame-retardant PLA has always been of great interest. In our study, we successfully synthesized a phosphorus-containing chitosan derivative (PCS) and combined it with aluminum hypophosphate (AP) to create an effective flame-retardant PLA system. PCS acted as an enhancer, enhancing the thermal performance, crystallinity, and toughness of PLA/AP. Compared to PLA modified with 12 wt% AP achieving UL-94 V-2 level and 24.3 % of limited oxygen index, PLA containing 3 wt% PCS and 9 wt% AP achieved UL-94 V-0 level and limited oxygen index of 28 %. The system testing studies such as CCT, Raman, XPS, and TG-IR results indicated that PLA/AP/PCS exhibited a dual flame-retardant mechanism of condensed and gas phases.
MeSH term(s)	Crystallization ; Chitosan ; Polyesters ; Flame Retardants ; Oxygen ; Phosphorus
Chemical Substances	poly(lactide) (459TN2L5F5) ; Chitosan (9012-76-4) ; Polyesters ; Flame Retardants ; Oxygen (S88TT14065) ; Phosphorus (27YLU75U4W)
Language	English
Publishing date	2024-03-08
Publishing country	Netherlands
Document type	Journal Article
ZDB-ID	282732-3
ISSN	1879-0003 ; 0141-8130
ISSN (online)	1879-0003
ISSN	0141-8130
DOI	10.1016/j.ijbiomac.2024.130648
Database	MEDical Literature Analysis and Retrieval System OnLINE

Full text online

Accessible to users with ZB MED library card

In stock of ZB MED Cologne/Königswinter

Zs.B 2374: Show issues

Location:
Je nach Verfügbarkeit (siehe Angabe bei Bestand)
bis Jg. 2021: Bestellungen von Artikeln über das Online-Bestellformular
ab Jg. 2022: Lesesaal (EG)

Order via subito

This service is chargeable due to the Delivery terms set by subito. Orders including an article and supplementary material will be classified as separate orders. In these cases, fees will be demanded for each order.

Details ▾

Article ; Online: Tensile Strength Statistics and Fracture Mechanism of Ultrahigh Molecular Weight Polyethylene Fibers: On the Weibull Distribution.

Ding, Jinyou / Chen, Gonglin / Huang, Wei / Cheng, Jinlong / Li, Ting / Cheng, Chunzu / Xu, Jigang

ACS omega

2024 Volume 9, Issue 11, Page(s) 12984–12991

Abstract: To study the distribution of ultrahigh molecular weight polyethylene fiber (UHMWPE) strength, three groups of UHMWPE fibers were spun by the gel spinning method, which was undrafted raw fibers (with high strain at break) and fibers with different ... ...

Abstract	To study the distribution of ultrahigh molecular weight polyethylene fiber (UHMWPE) strength, three groups of UHMWPE fibers were spun by the gel spinning method, which was undrafted raw fibers (with high strain at break) and fibers with different prespinning and postspinning draw ratios. It is found that even when the strain at break (ε
Language	English
Publishing date	2024-03-05
Publishing country	United States
Document type	Journal Article
ISSN	2470-1343
ISSN (online)	2470-1343
DOI	10.1021/acsomega.3c09230
Database	MEDical Literature Analysis and Retrieval System OnLINE

Order via subito

Inter-library loan at ZB MED

Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.

Article ; Online: A sustainable approach to enhance flame retardant, antibacterial and UV resistance of lyocell fabrics treated with luffa phosphate derivatives and emodin

Zhao, Jieyun / Su, Xiaowei / Jiang, Lina / Ren, Yuanlin / Liu, Xiaohui / Cheng, Chunzu

Cellulose. 2023 Jan., v. 30, no. 2 p.1265-1285

2023

Abstract: A multifunctional lyocell fabric with flame retardant, antibacterial and ultraviolet (UV)-resistant properties was fabricated. First, a novel and efficient eco-friendly intumescent flame retardant was synthesized by using natural luffa as raw materials, ... ...

Abstract	A multifunctional lyocell fabric with flame retardant, antibacterial and ultraviolet (UV)-resistant properties was fabricated. First, a novel and efficient eco-friendly intumescent flame retardant was synthesized by using natural luffa as raw materials, and was applied to lyocell fabric to improve its flame retardancy. Then, the flame retardant lyocell fabric was treated by emodin to simultaneously obtain the antibacterial and UV-resistant properties. The surface morphology and chemical structure of the treated fabric were analyzed by scanning electron microscopy, Fourier transform infrared spectroscopy and X-ray photoelectron spectroscopy, which confirmed the P–O–C covalent bond between the flame retardant and the fabric. Thermogravimetric, limiting oxygen index and cone calorimetry analysis demonstrated that the treated fabric possessed excellent char formation ability, thermal stability and flame retardancy. Thermogravimetric/infrared spectroscopy analyses of the treated fabric and the morphological study of the char residue after burning suggested that both gas-phase and condensed-phase mechanism contributed to the flame retardant improvement of lyocell fabric. In addition, after 20 laundering cycles, the treated fabric still maintained excellent flame retardant, antibacterial activity, and UV resistance properties. This study provided an eco-friendly and facile approach to produce lyocell fabric with multifunction of flame retardant, antibacterial and UV resistance.
Keywords	Fourier transform infrared spectroscopy ; X-ray photoelectron spectroscopy ; antibacterial properties ; calorimetry ; cellulose ; chemical bonding ; chemical structure ; electron microscopy ; emodin ; fabrics ; flame retardants ; oxygen ; phosphates ; thermal stability ; thermogravimetry
Language	English
Dates of publication	2023-01
Size	p. 1265-1285.
Publishing place	Springer Netherlands
Document type	Article ; Online
ZDB-ID	1496831-9
ISSN	1572-882X ; 0969-0239
ISSN (online)	1572-882X
ISSN	0969-0239
DOI	10.1007/s10570-022-04927-6
Database	NAL-Catalogue (AGRICOLA)

Full text online

Accessible to users with ZB MED library card

Order via subito

Details ▾
- Full text online
- Order with fees

Article ; Online: Simultaneous enhancement of mechanical strength and flame retardancy of lyocell fiber via filling fire-resistant cellulose-based derivative

Zhang, Qiuyan / Chen, Jie / Li, Di / Sun, Ling / Ren, Yuanlin / Cheng, Chunzu / Liu, Xiaohui

Industrial Crops & Products. 2023, p.116757-

2023 , Page(s) 116757–

Abstract: Functional materials such as fireproof fabrics or fibers usually destroy mechanical strength due to the introduction of flame retardant. In this work, ionic liquid 1,3-dimethyl imidazolium methyl phosphite, one solvent and modifier, was employed to ... ...

Abstract	Functional materials such as fireproof fabrics or fibers usually destroy mechanical strength due to the introduction of flame retardant. In this work, ionic liquid 1,3-dimethyl imidazolium methyl phosphite, one solvent and modifier, was employed to fabricate phosphorylated cellulose. As a cellulose-based derivative, phosphorylated cellulose displayed good compatibility and dispersity in cellulose spinning which was proved by the uniform cellulose spinning dope and compact fiber structure. Owing to the special and similar structure, phosphorylated cellulose interaction with cellulose unit was conducive to enhancing mechanical strength of lyocell fiber. The flame retardant lyocell fibers (FRLF) with phosphorus content (<1 at%) exhibited excellent flame retardancy. The value of peak of heat release rate (PHRR) declined by 50.9% compared with pure lyocell fibers (LF), as micro-combustion calorimetry measurement estimated. Meanwhile, the breaking strength of FRLF increased by 6.44% compared with that of LF. In brief, this work balanced the flame retardancy and mechanical properties of lyocell fibers via one-step synthesizing fire retardant cellulose-based filler based on the structural similarity between matrix and flame retardant.
Keywords	calorimetry ; cellulose ; fire resistance ; flame retardants ; heat ; imidazoles ; ionic liquids ; phosphorus content ; strength (mechanics) ; Flame retardancy ; Mechanical strength ; Lyocell fiber ; Cellulose-based derivative
Language	English
Publishing place	Elsevier B.V.
Document type	Article ; Online
Note	Pre-press version
ZDB-ID	1132158-1
ISSN	1872-633X ; 0926-6690
ISSN (online)	1872-633X
ISSN	0926-6690
DOI	10.1016/j.indcrop.2023.116757
Database	NAL-Catalogue (AGRICOLA)

Full text online

Accessible to users with ZB MED library card

In stock of ZB MED Bonn / Germany

Z 5577: Show issues

Order via subito

Inter-library loan at ZB MED

Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.

Details ▾

Article ; Online: Poly(amidoamine) dendrimer-induced 3D crosslinked network constructed on polyphenylene sulfide nonwoven as a battery separator: Effect of generation number on cell performance

Hu, Yuqin / Zhu, Guobin / Wang, Cheng / Xu, Jing / Wang, Luoxin / Wang, Hua / Cheng, Chunzu

Colloids and Surfaces A: Physicochemical and Engineering Aspects. 2023 Feb. 08, p.131100-

2023 , Page(s) 131100–

Abstract: High power lithium-ion batteries put forward challenges for separator in terms of meeting high current density, safety as well as superior cycling stability. In this study, Poly(amidoamine) (PAMAM) dendrimer-introduced three-dimensional (3D) crosslinked ... ...

Abstract	High power lithium-ion batteries put forward challenges for separator in terms of meeting high current density, safety as well as superior cycling stability. In this study, Poly(amidoamine) (PAMAM) dendrimer-introduced three-dimensional (3D) crosslinked coating layer is built on polyphenylene sulfide (PPS) nonwoven substrate to address above issues and the generation number effect are discussed thoroughly. Due to unique advantages of PAMAM dendrimer including its hydrophilicity to electrolyte, embedding effect of internal cavities, and spherical steric structure, the porosity, ionic conductivity, interfacial compatible as well as lithium-ion transference number are improved for the crosslinked composite separator especially at higher generation number, which endow battery with superior discharge capacity of 162.5 mAh g⁻¹ at 0.2C and outstanding C-rate capabilities. Moreover, through the adjustment of generation number, less crosslinking junctions but more crosslinking points at one junction can be achieved in PAMAM-induced 3D crosslinked structures, thus leading to the improvement of all mechanical properties concurrently. This behavior can shift the oxidative decomposition potential to 5.36V and give superior cell performance retention (98.6%) even after 100 cycles for battery using the fourth generation PAMAM. Therefore, this study will provide a new route for separator when pursuing higher rate performance and cyclic stability.
Keywords	batteries ; crosslinking ; dendrimers ; electrolytes ; hydrophilicity ; porosity ; sulfides ; Lithium-ion battery ; Composite separator ; Polyphenylene sulfide nonwoven ; Crosslinked network ; Dendrimer
Language	English
Dates of publication	2023-0208
Publishing place	Elsevier B.V.
Document type	Article ; Online
Note	Pre-press version
ZDB-ID	1500517-3
ISSN	0927-7757
ISSN	0927-7757
DOI	10.1016/j.colsurfa.2023.131100
Database	NAL-Catalogue (AGRICOLA)

Full text online

Accessible to users with ZB MED library card

Order via subito

Details ▾
- Full text online
- Order with fees

Article ; Online: Constructing a 3D Ion Transport Channel-Based CNF Composite Film with an Intercalated Structure for Superior Performance Flexible Supercapacitors.

Yan, Chunxia / Cheng, Fangyue / Guan, Jie / Li, Zhimao / Wang, Can / Chen, Nannan / Cheng, Chunzu / Wang, Feijun / Shao, Ziqiang

ACS applied materials & interfaces

2024

Abstract: The weak stiffness, huge thickness, and low specific capacitance of commonly utilized flexible supercapacitors hinder their great electrochemical performance. Learning from a biomimetic interface strategy, we design flexible film electrodes based on ... ...

Abstract	The weak stiffness, huge thickness, and low specific capacitance of commonly utilized flexible supercapacitors hinder their great electrochemical performance. Learning from a biomimetic interface strategy, we design flexible film electrodes based on functional intercalated structures with excellent electrochemical properties and mechanical flexibility. A composite film with high strength and flexibility is created using graphene (reduced graphene oxide (rGO)) as the plane layer, layered double metal hydroxide (LDH) as the support layer, and cellulose nanofiber (CNF) as the connection agent and flexible agent. The interlayer height can be adjusted by the ion concentration. The highly interconnected network enables excellent electron and ion transport channels, facilitating rapid ion diffusion and redox reactions. Moreover, the high flexibility and mechanical properties of the film achieve multiple folding and bending. The CNF-rGO-NiCoLDH film electrode exhibits high capacitance performance (3620.5 mF cm
Language	English
Publishing date	2024-04-25
Publishing country	United States
Document type	Journal Article
ISSN	1944-8252
ISSN (online)	1944-8252
DOI	10.1021/acsami.3c19037
Database	MEDical Literature Analysis and Retrieval System OnLINE

Order via subito

Inter-library loan at ZB MED

Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.

Article ; Online: Hydrophobic modification of cellulose nanofibers by gallic acid and the application in pressure sensing.

Li, Zhimao / Yan, Chunxia / Xu, Wenjing / Shang, Yanlong / Wu, Qian / Mehmood, Saqib / Wang, Feijun / Cheng, Chunzu / Liu, Qiong / Shao, Ziqiang

International journal of biological macromolecules

2024 Volume 261, Issue Pt 2, Page(s) 129770

Abstract: Via rational molecular structure design and using gallic acid (GA) for hydrophobic modification of cellulose nanofibers (CNF), the "polymer dipole" CNF-GA with hydrophilic main chains and hydrophobic side chains was prepared, which improved the poor ... ...

Abstract	Via rational molecular structure design and using gallic acid (GA) for hydrophobic modification of cellulose nanofibers (CNF), the "polymer dipole" CNF-GA with hydrophilic main chains and hydrophobic side chains was prepared, which improved the poor piezoelectric properties of CNF used for preparing pressure sensors. Due to the appearance of the side chains, the elongation at break of the CNF-GA-2, compared with CNF, was enhanced by 186 %, and the excellent tensile strength, puncture load, and tearing strength were displayed. Moreover, the significant glass transition temperature (T
MeSH term(s)	Humans ; Cellulose/chemistry ; Nanofibers/chemistry ; Polymers ; Tensile Strength ; Hydrophobic and Hydrophilic Interactions ; Nitrites ; Transition Elements
Chemical Substances	Cellulose (9004-34-6) ; MXene ; Polymers ; Nitrites ; Transition Elements
Language	English
Publishing date	2024-01-30
Publishing country	Netherlands
Document type	Journal Article
ZDB-ID	282732-3
ISSN	1879-0003 ; 0141-8130
ISSN (online)	1879-0003
ISSN	0141-8130
DOI	10.1016/j.ijbiomac.2024.129770
Database	MEDical Literature Analysis and Retrieval System OnLINE

Full text online

Accessible to users with ZB MED library card

In stock of ZB MED Cologne/Königswinter

Zs.B 2374: Show issues

Location:
Je nach Verfügbarkeit (siehe Angabe bei Bestand)
bis Jg. 2021: Bestellungen von Artikeln über das Online-Bestellformular
ab Jg. 2022: Lesesaal (EG)

Order via subito

Details ▾

Article ; Online: The effects of 4,6-Dichloro-2-Sodiooxy-1,3,5-Triazine on the Fibrillation Propensity of Lyocell Fibers

Xu, Zhongkai / Li, Ting / Guo, Yaoxian / Ma, Xuele / Shao, Ying / Cheng, Chunzu / Zhang, Dong / Xu, Jigang

Journal of Natural Fibers. 2023 Apr. 24, v. 20, no. 1 p.2181270-

2023

Abstract: Dichlorotriazine reactive crosslinker has been used to reduce the fibrillation of Lyocell. The fibrillation propensity and mechanism of 4, 6-dichloro-2-sodium dioxy-1, 3, 5-triazine treatment on Lyocell fibers were studied, and the mechanical properties ... ...

Abstract	Dichlorotriazine reactive crosslinker has been used to reduce the fibrillation of Lyocell. The fibrillation propensity and mechanism of 4, 6-dichloro-2-sodium dioxy-1, 3, 5-triazine treatment on Lyocell fibers were studied, and the mechanical properties and dyeing properties of the treated Lyocell fibers were evaluated. The results showed that the three-step reaction process can make lyocell have more uniform behavior of decreased fibrillation propensity, in which the first step is physical mixing of triazine and cellulose, the second and third steps are the stepwise reactions of cellulose with two chlorines of Dichlorotriazine under different conditions, respectively. At the end of the reaction, non-fibrillating Lyocell fibers were produced. In addition, the structure, mechanical properties and dyeing properties of the Lyocell fibers were not affected by the cross-linking chemical reaction process. In conclusion, this study provides a better uniform effect and economically reasonable route for the preparation of commercial non-fibrillating Lyocell fibers.
Keywords	cellulose ; chemical reactions ; crosslinking ; triazines ; Lyocell fibers ; 4,6-Dichloro-2-sodiooxy-1,3,5-triazine ; fibrillation ; cross-linked fibers ; wet abrasion resistance
Language	English
Dates of publication	2023-0424
Publishing place	Taylor & Francis
Document type	Article ; Online
ZDB-ID	2182715-1
ISSN	1544-046X ; 1544-0478
ISSN (online)	1544-046X
ISSN	1544-0478
DOI	10.1080/15440478.2023.2181270
Database	NAL-Catalogue (AGRICOLA)

In stock of ZB MED Bonn / Germany

Z 7564: Show issues

Order via subito

Inter-library loan at ZB MED

Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.

Details ▾
- See ZB MED holdings
- Order with fees

Article ; Online: Tissue paper‑based composite separator using double-crosslinked polymer electrolyte as coating layer for lithium-ion battery with superior ion transport and cyclic stability

Hu, Yuqin / Zhu, Guobin / Zeng, Xinyu / Wang, Cheng / Xu, Jing / Wang, Luoxin / Wang, Hua / Cheng, Chunzu

Cellulose. 2023 Jan., v. 30, no. 1 p.247-261

2023

Abstract: Nonwoven-based separators have unique advantages in meeting the demand of high power lithium-ion batteries (LIBs). However, conventional coating layer is usually found to give separator poor cyclic stability due to electrolyte plasticizing. Therefore, ... ...

Abstract	Nonwoven-based separators have unique advantages in meeting the demand of high power lithium-ion batteries (LIBs). However, conventional coating layer is usually found to give separator poor cyclic stability due to electrolyte plasticizing. Therefore, double-crosslinked coating layer was attempted to fabricate on substrate through sequencial reactions between diglycidyl ether terminated polydimethylsiloxane (PDMSDGE), poly (vinylidene fluoride-co-hexafluoropropylene) (PVDF-HFP) and branched polyethyleneimine (PEI). Due to low cost, convenient acess, good hydrophilicity and prominent thermal stability, tissue paper was choosen as a substrate. This designed double-crosslinked composite separator (DN@CS) was observered to have unique advantages in terms of porosity, electrolyte uptake and wettability, ionic conductivity as well as transference number, which finally endowed battery with excellent discharge performance especilly at higher C-rate. As a result of mutual entanglement between two networks, the double-crosslinked separator possessed stronger skeleten, thus giving superior mechanical properties retention (95.05%) after electrolyte infiltration and higher discharge capacity retention (86.89%) even experienced 200 cycles. Moreover, the affinity between branched PEI and Li⁺ has been discovered to enable uniform Li deposition through electrokinetic effects. Clearly, this designed double-crosslinked network will bring new breakthrough for separator during the development of higher power LIBs.
Keywords	cellulose ; electrolytes ; hydrophilicity ; lithium batteries ; polydimethylsiloxane ; polyethyleneimine ; porosity ; thermal stability ; tissue paper ; wettability
Language	English
Dates of publication	2023-01
Size	p. 247-261.
Publishing place	Springer Netherlands
Document type	Article ; Online
ZDB-ID	1496831-9
ISSN	1572-882X ; 0969-0239
ISSN (online)	1572-882X
ISSN	0969-0239
DOI	10.1007/s10570-022-04874-2
Database	NAL-Catalogue (AGRICOLA)

Full text online

Accessible to users with ZB MED library card

Order via subito

Details ▾
- Full text online
- Order with fees

Article ; Online: Ionic conductivity and cycling stability-enhanced composite separator using hollow halloysite nanotubes constructed on PP nonwoven through polydopamine-induced water-based coating method

Wang, Cheng / Zhu, Guobin / Hu, Yuqin / Sun, Jiuxiao / Xu, Jing / Wang, Luoxin / Wang, Hua / Cheng, Chunzu

Colloids and Surfaces A: Physicochemical and Engineering Aspects. 2023 June, v. 667 p.131403-

2023

Abstract: Ceramic-coating separator can meet the safety requirements of high-power battery through its good thermal tolerance, thus raising more attention recently. During preparation, aqueous coating has been considered as an environmentally friendly method. ... ...

Abstract	Ceramic-coating separator can meet the safety requirements of high-power battery through its good thermal tolerance, thus raising more attention recently. During preparation, aqueous coating has been considered as an environmentally friendly method. However, there are some drawbacks for direct coating to be tackled including weak bonding strength and too dense structures of coating layer. In this study, porous sodium alginate/halloysite nanotubes coating was constructed on PP nonwoven by polydopamine-induced water-based coating method to give PHS composite separators. Porous structures were produced by the delayed evaporation of nonsolvent N-methyl pyrrolidone (NMP) in coating slurry. These structures together with hollow structures of halloysite nanotubes (HNTs) were confirmed to boost porosity, wettability and ionic conductivity, thus PHS-4 separator with more HNTs introduced endowing battery with superior discharge performance (159.2 mAh g⁻¹) at 0.2 C. Because of more space to store electrolyte, when wetted PHS-4 separator was ignited, it could also give self-extinguishing phenomenon at a shorter time. In addition, the pretreatment of polydopamine before aqueous coating and the overlap among HNTs with high aspect ratio were investigated to increase interfacial peeling strength, therefore PHS-4 separator displayed the best cycling stability with discharge capacity retention achieving 99.1%. Clearly, PHS-4 separator will bring prospect for LIB to pursue high performance and environmentally friendliness.
Keywords	batteries ; electrolytes ; evaporation ; halloysite ; heat tolerance ; nanotubes ; porosity ; pyrrolidones ; slurries ; sodium alginate ; sustainable technology ; wettability ; Lithium-ion battery ; Composite separator ; Water-based coating ; Polydopamine ; Halloysite nanotubes
Language	English
Dates of publication	2023-06
Publishing place	Elsevier B.V.
Document type	Article ; Online
ZDB-ID	1500517-3
ISSN	0927-7757
ISSN	0927-7757
DOI	10.1016/j.colsurfa.2023.131403
Database	NAL-Catalogue (AGRICOLA)

Full text online

Accessible to users with ZB MED library card

Order via subito

Details ▾
- Full text online
- Order with fees

To top

Full text online

More links

Kategorien

In stock of ZB MED Cologne/Königswinter

Order via subito

More links

Kategorien

Order via subito

Inter-library loan at ZB MED

Full text online

More links

Kategorien

Order via subito

Full text online

More links

Kategorien

In stock of ZB MED Bonn / Germany

Order via subito

Inter-library loan at ZB MED

Full text online

More links

Kategorien

Order via subito

More links

Kategorien

Order via subito

Inter-library loan at ZB MED

Full text online

More links

Kategorien

In stock of ZB MED Cologne/Königswinter

Order via subito

More links

Kategorien

In stock of ZB MED Bonn / Germany

Order via subito

Inter-library loan at ZB MED

Full text online

More links

Kategorien

Order via subito

Full text online

More links

Kategorien

Order via subito