Effect of cellulose solubility on the thermal and mechanical properties of regenerated cellulose/graphene nanocomposites based on ionic liquid 1-allyl-3-methylimidazoliun chloride

RSC Advances ◽  
2015 ◽  
Vol 5 (93) ◽  
pp. 76302-76308 ◽  
Author(s):  
Tongping Zhang ◽  
Xiaoting Liu ◽  
Min Jiang ◽  
Yongxin Duan ◽  
Jianming Zhang
Keyword(s):  
Mechanical Properties ◽  
Ionic Liquid ◽  
Dissolution Time ◽  
Regenerated Cellulose ◽  
Thermal And Mechanical Properties ◽  
Graphene Nanocomposites

A small amount of IRGO sheets can largely decelerate the dissolution of cellulose in AmimCl, and the mechanical properties of the regenerated cellulose/graphene nanocomposites materials can be tuned by the dissolution time.

Effects of ionic liquid types on the tribological, mechanical, and thermal properties of ionic liquid modified graphene/polyimide shape memory composites

2021 ◽  
pp. 095400832199676
Author(s):  
Yuting Ouyang ◽  
Qiu Zhang ◽  
Xiukun Liu ◽  
Ruan Hong ◽  
Xu Xu ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Ionic Liquid ◽  
Composite Materials ◽  
Shape Memory ◽  
Recovery Rate ◽  
Shape Recovery ◽  
Graphene Nanosheets ◽  
Mechanical And Thermal Properties ◽  
Thermal And Mechanical Properties ◽  
Modified Graphene

Different ionic liquid modified graphene nanosheets (IG) were induced into polyimide (PI) to improve the tribological, thermal, and mechanical properties of shape memory IG/PI composites. The results demonstrated that when using 1-aminoethyl-3-methylimidazole bromide to modify graphene nanosheets (IG-1), the laser-driven shape recovery rate of IG-1/PI composites (IGPI-1) reached 73.02%, which was 49.36% higher than that of pure PI. In addition, the IGPI-1 composite materials reached the maximum shape recovery rate within 15 s. Additionally, under dry sliding, the addition of IG can significantly improve the tribological properties of composite materials. IGPI-1 exhibited the best self-lubricating properties. Compared with pure PI, the friction coefficient (0.19) and wear rate (2.62 × 10–5) mm3/Nm) were reduced by 44.1% and 24.2%, respectively, and the T10% of IGPI-1 increased by 32.2°C. The Tg of IGPI-1 reached 256.5°C, which was 8.4°C higher than that of pure PI. In addition, the tensile strength and modulus of IGPI-1 reached 82.3 MPa and 1.18 GPa, which were significantly increased by 33.6% and 29.8%, respectively, compared with pure PI. We hope that this work will be helpful for the preparation of shape memory materials with excellent tribological, thermal, and mechanical properties.

Structure and Mechanical Properties of Regenerated Cellulose Fibers Wet-Spun from Ionic Liquid/Cosolvent Systems

2019 ◽  
Vol 20 (3) ◽  
pp. 501-511
Author(s):  
Young Jae Lee ◽  
Sung Jun Lee ◽  
Sang Won Jeong ◽  
Hyun-chul Kim ◽  
Tae Hwan Oh ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Ionic Liquid ◽  
Cellulose Fibers ◽  
Regenerated Cellulose

Fabrication and comparative evaluation of regenerated cellulose films using pulp fines and pith from corn stalk in DMAc/LiCl solvent system

BioResources ◽  
2019 ◽  
Vol 14 (3) ◽  
pp. 6421-6432
Author(s):  
Heng Zhang ◽  
Xiaoning Tang ◽  
Xin Gao ◽  
Keli Chen
Keyword(s):  
Mechanical Properties ◽  
Ionic Liquid ◽  
Comparative Evaluation ◽  
Solvent System ◽  
Regenerated Cellulose ◽  
Corn Stalk ◽  
Small Particles ◽  
Cellulosic Materials ◽  
Cellulose Films ◽  
Regenerated Cellulose Films

Cellulose of corn stalk pulp fines and stalk pith were dissolved in an ionic liquid solvent system (DMAc/LiCl) and then regenerated to form films. The mechanical properties and Tmax of pulp fines/regenerated cellulose (RC) films were higher than that of the corresponding films from stalk pith. As the ratio of small particles was high in the pulp fines, the elongation at breakage of their RC films also increased to 12.9%. Thus, pulp fines were suitable for prepared regenerated cellulosic materials.

Dissolution Condition Effect on Cellulose in Ionic Liquid and the Recycling of Ionic Liquid

2014 ◽  
Vol 644-650 ◽  
pp. 5207-5210
Author(s):  
Yan Hao ◽  
Ting Ting Li ◽  
Xue Lian Ma ◽  
Gui Bao Guo
Keyword(s):  
Ionic Liquid ◽  
Elevated Temperature ◽  
Room Temperature ◽  
Degree Of Polymerization ◽  
Room Temperature Ionic Liquids ◽  
Dissolution Time ◽  
Vacuum Drying ◽  
Regenerated Cellulose ◽  
Condition Effect ◽  
Homogeneous Modification

Recently, room temperature ionic liquids (RTILs) have been widely used in dissolution, homogeneous modification of cellulose. Cellulose only could be dissolved in RTILs at elevated temperature. Herein, effect of dissolution condition on microcrystalline cellulose in 1-butyl-3-methylimidazolium chloride ([Bmim]Cl) ionic liquid was studied. The results indicated that the degree of polymerization (DP) of regenerated cellulose decreased from 161 to 83 with the increasing of dissolution temperature in the range of 70 °C to 110 °C, whereas the DP was affected by dissolution time slightly. Moreover, after dissolution [Bmim]Cl could be recycled by distillation and vacuum drying. The recycled [Bmim]Cl also had good dissolving capability of cellulose, and its FTIR spectra was similar to that of original [Bmim]Cl.

Effect of Click-Chemistry Approaches for Graphene Modification on the Electrical, Thermal, and Mechanical Properties of Polyethylene/Graphene Nanocomposites

2013 ◽  
Vol 46 (22) ◽  
pp. 8980-8987 ◽  
Author(s):  
Marta Castelaín ◽  
Gerardo Martínez ◽  
Carlos Marco ◽  
Gary Ellis ◽  
Horacio J. Salavagione
Keyword(s):  
Mechanical Properties ◽  
Click Chemistry ◽  
Thermal And Mechanical Properties ◽  
Graphene Nanocomposites
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