Relationship between polarons and optical activity for conductive polymer/hydroxypropyl cellulose composite

2020 ◽  
Vol 58 (13) ◽  
pp. 1881-1888
Author(s):  
Naoto Eguchi ◽  
Hiromasa Goto
Keyword(s):  
Optical Activity ◽  
Conductive Polymer ◽  
Hydroxypropyl Cellulose ◽  
Cellulose Composite

scholarly journals Haemocompatibility and ion exchange capability of nanocellulose polypyrrole membranes intended for blood purification

2012 ◽  
Vol 9 (73) ◽  
pp. 1943-1955 ◽  
Author(s):  
Natalia Ferraz ◽  
Daniel O. Carlsson ◽  
Jaan Hong ◽  
Rolf Larsson ◽  
Bengt Fellström ◽  
...  
Keyword(s):  
Ion Exchange ◽  
Platelet Adhesion ◽  
Conductive Polymer ◽  
Exchange Capacity ◽  
The Novel ◽  
Isotonic Solution ◽  
Solution Ph ◽  
Heparin Coating ◽  
New Generation ◽  
Cellulose Composite

Composites of nanocellulose and the conductive polymer polypyrrole (PPy) are presented as candidates for a new generation of haemodialysis membranes. The composites may combine active ion exchange with passive ultrafiltration, and the large surface area (about 80 m 2 g −1 ) could potentially provide compact dialysers. Herein, the haemocompatibility of the novel membranes and the feasibility of effectively removing small uraemic toxins by potential-controlled ion exchange were studied. The thrombogenic properties of the composites were improved by applying a stable heparin coating. In terms of platelet adhesion and thrombin generation, the composites were comparable with haemocompatible polymer polysulphone, and regarding complement activation, the composites were more biocompatible than commercially available membranes. It was possible to extract phosphate and oxalate ions from solutions with physiological pH and the same tonicity as that of the blood. The exchange capacity of the materials was found to be 600 ± 26 and 706 ± 31 μmol g −1 in a 0.1 M solution (pH 7.4) and in an isotonic solution of phosphate, respectively. The corresponding values with oxalate were 523 ± 5 in a 0.1 M solution (pH 7.4) and 610 ± 1 μmol g −1 in an isotonic solution. The heparinized PPy–cellulose composite is consequently a promising haemodialysis material, with respect to both potential-controlled extraction of small uraemic toxins and haemocompatibility.

Design and fabrication of conductive polymer hydrogels and their applications in flexible supercapacitors

2020 ◽  
Vol 8 (44) ◽  
pp. 23059-23095 ◽  
Author(s):  
Xinting Han ◽  
Guangchun Xiao ◽  
Yuchen Wang ◽  
Xiaona Chen ◽  
Gaigai Duan ◽  
...  
Keyword(s):  
Conductive Polymer ◽  
Polymer Hydrogels ◽  
Conductive Materials ◽  
Flexible Supercapacitors

Conductive polymer hydrogels, which combine the advantages of both polymers and conductive materials, have huge potential in flexible supercapacitors.

Mineral/microfibrillated cellulose composite materials: High performance products, applications, and product forms

TAPPI Journal ◽  
2018 ◽  
Vol 17 (09) ◽  
pp. 507-515 ◽  
Author(s):  
David Skuse ◽  
Mark Windebank ◽  
Tafadzwa Motsi ◽  
Guillaume Tellier
Keyword(s):  
Composite Materials ◽  
High Performance ◽  
Aqueous Suspension ◽  
Production Capacity ◽  
Cost Savings ◽  
Cost Effective ◽  
New Materials ◽  
Wet Strength ◽  
Product Forms ◽  
Cellulose Composite

When pulp and minerals are co-processed in aqueous suspension, the mineral acts as a grinding aid, facilitating the cost-effective production of fibrils. Furthermore, this processing allows the utilization of robust industrial milling equipment. There are 40000 dry metric tons of mineral/microfbrillated (MFC) cellulose composite production capacity in operation across three continents. These mineral/MFC products have been cleared by the FDA for use as a dry and wet strength agent in coated and uncoated food contact paper and paperboard applications. We have previously reported that use of these mineral/MFC composite materials in fiber-based applications allows generally improved wet and dry mechanical properties with concomitant opportunities for cost savings, property improvements, or grade developments and that the materials can be prepared using a range of fibers and minerals. Here, we: (1) report the development of new products that offer improved performance, (2) compare the performance of these new materials with that of a range of other nanocellulosic material types, (3) illustrate the performance of these new materials in reinforcement (paper and board) and viscosification applications, and (4) discuss product form requirements for different applications.

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