Biodegradability of Regenerated Cellulose Films Coated with Polyurethane/Natural Polymers Interpenetrating Polymer Networks

1999 ◽  
Vol 38 (11) ◽  
pp. 4284-4289 ◽  
Author(s):  
Lina Zhang ◽  
Jinping Zhou ◽  
Jin Huang ◽  
Ping Gong ◽  
Qi Zhou ◽  
...  
Keyword(s):  
Polymer Networks ◽  
Interpenetrating Polymer Networks ◽  
Regenerated Cellulose ◽  
Natural Polymers ◽  
Cellulose Films ◽  
Regenerated Cellulose Films

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

scholarly journals Interpenetrating Polymer Networks as Innovative Drug Delivery Systems

2014 ◽  
Vol 2014 ◽  
pp. 1-11 ◽  
Author(s):  
Alka Lohani ◽  
Garima Singh ◽  
Shiv Sankar Bhattacharya ◽  
Anurag Verma
Keyword(s):  
Drug Delivery ◽  
Drug Delivery Systems ◽  
Polymer Networks ◽  
Controlled Drug Release ◽  
Delivery Systems ◽  
Interpenetrating Polymer Networks ◽  
Bioactive Molecules ◽  
Polymer Science ◽  
Natural Polymers ◽  
Innovative Drug

Polymers have always been valuable excipients in conventional dosage forms, also have shown excellent performance into the parenteral arena, and are now capable of offering advanced and sophisticated functions such as controlled drug release and drug targeting. Advances in polymer science have led to the development of several novel drug delivery systems. Interpenetrating polymer networks (IPNs) have shown superior performances over the conventional individual polymers and, consequently, the ranges of applications have grown rapidly for such class of materials. The advanced properties of IPNs like swelling capacity, stability, biocompatibility, nontoxicity and biodegradability have attracted considerable attention in pharmaceutical field especially in delivering bioactive molecules to the target site. In the past few years various research reports on the IPN based delivery systems showed that these carriers have emerged as a novel carrier in controlled drug delivery. The present review encompasses IPNs, their types, method of synthesis, factors which affects the morphology of IPNs, extensively studied IPN based drug delivery systems, and some natural polymers widely used for IPNs.

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