Carboxymethyl cellulose and cellulose nanocrystals from cassava stem as thickeners in reactive printing of cotton

Cellulose nanocrystals (CNCs) and/or sepiolite (SPT) were thermomechanically mixed with un-plasticised chitosan and chitosan/carboxymethyl cellulose (CMC) blends plasticised with 1-ethyl-3-methylimidazolium acetate ([C2mim][OAc]). Examination of the morphology of these materials indicates that SPT aggregates were reduced when CNCs or [C2mim][OAc] were present. Inclusion of CNCs and/or SPT had a greater effect on material properties when the matrices were un-plasticised. Addition of SPT or CNCs altered the crystalline structure of the un-plasticised chitosan matrix. Moreover, a combination of SPT and CNCs was more effective at suppressing re-crystallisation. Nonetheless, the mechanical properties and surface hydrophobicity were more related to CNC/SPT–biopolymer interactions. The un-plasticised bionanocomposites generally showed increased relaxation temperatures, enhanced tensile strength, and reduced surface wettability. For the [C2mim][OAc] plasticised matrices, the ionic liquid (IL) dominates the interactions with the biopolymers such that the effect of the nanofillers is diminished. However, for the [C2mim][OAc] plasticised chitosan/CMC matrix, CNCs and SPT acted synergistically suppressing re-crystallisation but resulting in increased tensile strength.

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Carboxymethyl cellulose/cellulose nanocrystals immobilized silver nanoparticles as an effective coating to improve barrier and antibacterial properties of paper for food packaging applications

Carbohydrate Polymers ◽

10.1016/j.carbpol.2020.117156 ◽

2021 ◽

Vol 252 ◽

pp. 117156 ◽

Cited By ~ 1

Author(s):

Yunqing He ◽

Hui Li ◽

Xiang Fei ◽

Lincai Peng

Keyword(s):

Silver Nanoparticles ◽

Cellulose Nanocrystals ◽

Carboxymethyl Cellulose ◽

Food Packaging ◽

Antibacterial Properties

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Effect of Cellulose Nanocrystals Nanofiller on the Structure and Sorption Properties of Carboxymethyl Cellulose–Glycerol–Cellulose Nanocrystals Nanocomposite Systems

Materials ◽

10.3390/ma13132900 ◽

2020 ◽

Vol 13 (13) ◽

pp. 2900

Author(s):

Maria-Cristina Popescu ◽

Bianca-Ioana Dogaru ◽

Carmen-Mihaela Popescu

Keyword(s):

Cellulose Nanocrystals ◽

Carboxymethyl Cellulose ◽

Gravimetric Method ◽

Principal Component ◽

Structural Features ◽

Correlation Spectroscopy ◽

Sorption Properties ◽

Nanocomposite Films ◽

Biobased Materials ◽

Carboxylate Groups

Biobased materials present a great interest due to their properties and biodegradability. Cellulose nanocrystals (CNC) nanofiller, in various amounts, was incorporated into a carboxymethyl cellulose (CMC)–glycerol (G) matrix in order to obtain nanocomposite systems with improved properties. The effect of the nanofiller on the structural features was investigated by Fourier transform infrared (FT-IR) spectroscopy, principal component analysis (PCA), two-dimensional correlation spectroscopy (2D-COS), and X-ray diffraction, while the sorption properties were evaluated by water vapor isotherms using the gravimetric method coupled with infrared spectroscopy. We observed the presence of the interactions taking place between the CMC-G and CNC involving the hydroxyl and carboxylate groups, which decreased the number of water sorption sites. Following this, the moisture content in the nanocomposite films decreased with the increase in the amount of CNC. Moreover, the bands associated to water molecules presented different wavenumber values separated for CMC-G and CNC components.

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Cationic surface modification of cellulose nanocrystals: Toward tailoring dispersion and interface in carboxymethyl cellulose films

Polymer ◽

10.1016/j.polymer.2016.11.022 ◽

2016 ◽

Vol 107 ◽

pp. 200-210 ◽

Cited By ~ 41

Author(s):

Mei-Chun Li ◽

Changtong Mei ◽

Xinwu Xu ◽

Sunyoung Lee ◽

Qinglin Wu

Keyword(s):

Surface Modification ◽

Cellulose Nanocrystals ◽

Carboxymethyl Cellulose ◽

Cellulose Films

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Carboxymethyl cellulose assisted mechanical preparation of cellulose nanocrystals with high yield

Cellulose ◽

10.1007/s10570-019-02452-7 ◽

2019 ◽

Vol 26 (9) ◽

pp. 5227-5236 ◽

Cited By ~ 2

Author(s):

Xiaobo Lin ◽

Xiangyang Guo ◽

Chaofei Xu ◽

Min Wu

Keyword(s):

Cellulose Nanocrystals ◽

Carboxymethyl Cellulose ◽

High Yield ◽

Mechanical Preparation

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Superabsorbent hydrogels enhanced by quaternized tunicate cellulose nanocrystals with adjustable strength and swelling ratio

Cellulose ◽

10.1007/s10570-021-03776-z ◽

2021 ◽

Author(s):

Peng Wei ◽

Weiwei Chen ◽

Qinghua Song ◽

Yibing Wu ◽

Youjia Xu

Keyword(s):

Water Absorption ◽

Cellulose Nanocrystals ◽

Carboxymethyl Cellulose ◽

Absorption Capacity ◽

Swelling Ratio ◽

Biodegradable Material ◽

Equilibrium Swelling ◽

The Matrix ◽

Equilibrium Swelling Ratio ◽

Superabsorbent Hydrogels

AbstractSuperabsorbent hydrogels were prepared from biodegradable material, where the matrix was cross-linked cellulose and carboxymethyl cellulose and reinforced by quaternized tunicate cellulose nanocrystals (Q-TCNCs). Due to the large amount of hydrophilic groups on cellulose, carboxymethyl cellulose, and Q-TCNCs, the hydrogels had excellent water absorption capacity. The equilibrium swelling ratio of superabsorbent hydrogels exceeded 500 g/g in deionized water and exceeded 120 g/g even in synthetic urine, which was higher than those of commercial absorbent materials composed of copolymers of acrylic acid and acrylamide. The water absorption performances and mechanical properties of the hydrogels could be adjusted by changing the content of Q-TCNCs. The resultant materials were expected to replace those polyolefin-based materials, thereby reducing environmental pollution.

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