Polyvinyl alcohol/quaternary ammonium chitosan hydrogel electrolyte for sensing supercapacitors with excellent performance

2022 ◽  
Vol 46 ◽  
pp. 103918
Author(s):  
Chenglong Li ◽  
Geng Liu ◽  
Shuang Wang ◽  
Di Wang ◽  
Fengxiang Liu ◽  
...  
Keyword(s):  
Polyvinyl Alcohol ◽  
Quaternary Ammonium ◽  
Excellent Performance ◽  
Chitosan Hydrogel

Quaternary ammonium chitosan/polyvinyl alcohol composites prepared by electrospinning with high antibacterial properties and filtration efficiency

2019 ◽  
Vol 54 (19) ◽  
pp. 12522-12532 ◽  
Author(s):  
Chenrong Wang ◽  
Ji Fan ◽  
Rui Xu ◽  
Lishan Zhang ◽  
Shan Zhong ◽  
...  
Keyword(s):  
Polyvinyl Alcohol ◽  
Quaternary Ammonium ◽  
Antibacterial Properties ◽  
Filtration Efficiency

Utilizing Alginate to Improve Elasticity and Moisture Balance of Polyvinyl Alcohol/Chitosan Hydrogel Wound Dressing

2020 ◽  
Vol 988 ◽  
pp. 153-161
Author(s):  
Ria Barleany Dhena ◽  
Alwan Hafid ◽  
Milawati Aini ◽  
Bustomi Ahmad ◽  
Erizal
Keyword(s):  
Polyvinyl Alcohol ◽  
Wound Dressing ◽  
Three Dimensional ◽  
Chitosan Hydrogel ◽  
Equilibrium Degree ◽  
Dimensional Network ◽  
Alginate Concentration ◽  
Swelling Capacity ◽  
Moisture Balance ◽  
Moisture Vapour

Uncontrolled hemorrhage is the leading cause of death. The efficient hemostatic dressings are needed to promote coagulation and hold ongoing hemorrhage. Hydrogels are hydrophilic polymers with three-dimensional network structures with high swelling capacity to prevent accumulation of exudates. Hydrogels prepared from polyvinyl alcohol (PVA) grafted with chitosan have attracted considerable attentions due to their biocompatibility, high moisture balance property, and transparency. In this study, alginate was utilized to improve elasticity and thermal stability, also enhance hydrophilicity and increase swelling ability. The hydrogels composed of PVA (7.5 % w/v), chitosan (0.05 % w/v), and alginate (0.2, 0.4, and 0.6 % w/v) were synthesized by gamma irradiation technique at total dose of 15 kGy. The results showed that the increasing of alginate concentration in the total reactant mixture can improve elasticity, swelling capacity and the equilibrium degree of swelling (EDS), and decrease water vapour transmitted rate/moisture vapour transmitted rate (MVTR). The hydrogel wound dressing with 0.6 % of alginate concentration was the best product in this study with 79.49 % gel content, 608.65 % swelling ratio, 628.32 % EDS in 22 hours, elasticity 62.58 KPa, evaporation rate (MVTR) 105g/m2 h, degraded at temperature of 298.89oC, and the weight loss was reached 88.84 % (w/w).

Preparation and characterization of quaternary ammonium chitosan hydrogel with significant antibacterial activity

2015 ◽  
Vol 79 ◽  
pp. 830-836 ◽  
Author(s):  
Lihong Fan ◽  
Jing Yang ◽  
Huan Wu ◽  
Zhihai Hu ◽  
Jiayan Yi ◽  
...  
Keyword(s):  
Antibacterial Activity ◽  
Quaternary Ammonium ◽  
Chitosan Hydrogel
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