Environmentally friendly regenerated cellulose films with improved dielectric properties via manipulating the hydrogen bonding network

2021 ◽  
Vol 119 (2) ◽  
pp. 022903
Author(s):  
Shao-Cong Shi ◽  
Chao Chen ◽  
Jin-Long Zhu ◽  
Yue Li ◽  
Xin Meng ◽  
...  
Keyword(s):  
Hydrogen Bonding ◽  
Dielectric Properties ◽  
Environmentally Friendly ◽  
Regenerated Cellulose ◽  
Cellulose Films ◽  
Hydrogen Bonding Network ◽  
Regenerated Cellulose Films

Studies on Tensile Strength, Heat-Shrinkage Force, and Crystallinity of Rayon Tire Cords and Regenerated Cellulose Films at Elevated Temperatures

1969 ◽  
Vol 39 (3) ◽  
pp. 284-289 ◽  
Author(s):  
Setsuo Fukuhara ◽  
Shigeo Omote ◽  
Yasuo Suzuki
Keyword(s):  
Tensile Strength ◽  
Hydrogen Bonding ◽  
Regenerated Cellulose ◽  
Ir Absorption ◽  
Crystalline Region ◽  
Bonding Force ◽  
Cellulose Films ◽  
Regenerated Cellulose Film ◽  
Shrinkage Force ◽  
Regenerated Cellulose Films

Measurements were made of tensile strength and heat-shrinkage force of rayon tire cords and of ir absorption spectra (unpolarized and polarized) of regenerated cellulose films in D2O vapor at elevated temperatures. The changes in crystallinity and frequency of OH absorption bands (intermolecular and intramolecular hydrogen bonding) in the crystalline region with increasing temperatures were determined. The ir absorption spectra of dry, regenerated cellulose films were also measured. The decrease in intermolecular hydrogen-bonding force with increasing temperatures was larger than that in intramolecular hydrogen-bonding force in the crystalline region of regenerated cellulose film. The increase in heat-shrinkage force of dry, rayon tire-cord filaments was related with the decrease in hydrogen bonding force. The decrease in tensile strength of rayon tire cord was correlated with the decrease of ir crystallinity and intermolecular hydrogen-bonding force in the crystalline region of regenerated cellulose film.

scholarly journals Synthesis of Quaternary Ammonium Room-Temperature Ionic Liquids and their Application in the Dissolution of Cellulose

2019 ◽  
Vol 9 (9) ◽  
pp. 1750 ◽  
Author(s):  
Yao-Hsuan Tseng ◽  
Yu-Yin Lee ◽  
Shih-Hsun Chen
Keyword(s):  
Ionic Liquids ◽  
Quaternary Ammonium ◽  
Room Temperature ◽  
Room Temperature Ionic Liquids ◽  
Regenerated Cellulose ◽  
Exchange Reactions ◽  
Cellulose Films ◽  
Structural Regularity ◽  
Rapid Dissolution ◽  
Regenerated Cellulose Films

In this work, several kinds of quaternary ammonium-based room-temperature ionic liquids (QA RTILs) are synthesized by alkylation and ion-exchange reactions for the rapid dissolution of cellulose. The applications of cellulose materials have been limited due to their poor solubility in conventional organic solvents, because of a high degree of structural regularity and a large number of hydrogen bonds. The prepared ionic liquids were identified by nuclear magnetic resonance, elemental analysis, and liquid chromatography-mass spectrometry. The results indicated that N,N,N-triethylhexan-1-aminium acetate (N6222OAc), tetrahexylammonium acetate (N6666OAc), and N,N,N,N′,N′,N′-hexaethyldecane-1,10-diaminium acetate (C10(N222OAc)2) exhibited good cellulose-dissolution without any pretreatment. The regenerated cellulose films with a low degree of crystallization of the cellulose II phase were also prepared easily in this process using N6222OAc due to its polar and small cation. These QA RTILs can be used as non-derivatizing solvents for cellulose and can also be easily recycled because of their thermostable and nonvolatile properties.

Mechanical anisotropy of regenerated cellulose films in relation to orientations of crystalline and noncrystalline phases

1969 ◽  
Vol 7 (2) ◽  
pp. 325-355 ◽  
Author(s):  
Shunji Nomura ◽  
Sueo Kawabata ◽  
Hiromichi Kawai ◽  
Yutaka Yamaguchi ◽  
Akio Fukushima ◽  
...  
Keyword(s):  
Mechanical Anisotropy ◽  
Regenerated Cellulose ◽  
Cellulose Films ◽  
Regenerated Cellulose Films
Sign in / Sign up

Export Citation Format

Share Document