Preparation and photochromic properties of pyrazolones/polyvinyl alcohol composite films

2017 ◽  
Vol 28 (2) ◽  
pp. 280-284 ◽  
Author(s):  
Ji-Xi Guo ◽  
Ming-Xi Guo ◽  
Dian-Zeng Jia ◽  
Yin-Hua Li
Keyword(s):  
Polyvinyl Alcohol ◽  
Composite Films ◽  
Photochromic Properties

Production of UV-shielded spherical lignin particles as multifunctional bio-additives for polyvinyl alcohol composite films

2021 ◽  
Vol 23 (8) ◽  
Author(s):  
Bongkot Hararak ◽  
Charinee Winotapun ◽  
Jitapatee Inyai ◽  
Prapudsorn Wannid ◽  
Chureerat Prahsarn
Keyword(s):  
Polyvinyl Alcohol ◽  
Composite Films

Enhanced functional properties of biodegradable Polyvinyl alcohol /carboxymethyl cellulose (PVA/CMC) composite films reinforced with L-alanine surface modified CuO nanorods

2021 ◽  
Author(s):  
Yamanappagouda Amaregouda ◽  
Kantharaju Kamanna ◽  
Tilak Gasti ◽  
Vijay Kumbar
Keyword(s):  
Polyvinyl Alcohol ◽  
Carboxymethyl Cellulose ◽  
Food Packaging ◽  
Composite Films ◽  
Nanocomposite Films ◽  
Soil Burial ◽  
High Antibacterial Activity ◽  
Active Food Packaging ◽  
Surface Modified ◽  
Cuo Nanorods

Abstract Herein, we described novel biogenic preparation of the CuO nanorods and its surface modification with L-alanine amino acid accelerated by microwave irradiation. The effect of surface functionalized CuO nanorods on the polyvinyl alcohol/carboxymethyl cellulose film physico-mechanical properties were investigated through various characterization techniques. The tensile strength was improved from 28.58 ± 0.73 MPa to 43.40 ± 0.93 MPa, UV shielding ability and barrier to the water vapors were highly enhanced when PVA/CMC matrices filled with 8 wt% of CuO-L-alanine. In addition, the prepared films exhibited acceptable overall migration limit and readily undergoes soil burial degradation. Nevertheless, CuO-L-alanine incorporated films showed potent antioxidant activity against DPPH radicals and had high antibacterial activity against Staphylococcus aureus and Escherichia coli, and antifungal activity against Candida albicans and Candida tropicalis. Furthermore, the nanocomposite films showed negligible cytotoxic effect on HEK293 and Caco-2 cell lines. In these contexts, the developed nanocomposite films can be implementing as an active food packaging material.

Application of self-healing, swellable and biodegradable polymers for wound treatment

2021 ◽  
Vol 30 (Sup9a) ◽  
pp. IVi-IVx
Author(s):  
Chukwuma O Agubata ◽  
Mary A Mbah ◽  
Paul A Akpa ◽  
Godwin Ugwu
Keyword(s):  
Wound Healing ◽  
Polyvinyl Alcohol ◽  
Biodegradable Polymers ◽  
Hydroxypropyl Methylcellulose ◽  
Composite Films ◽  
Self Healing ◽  
Moisture Uptake ◽  
Folding Endurance

Aim: Self-healing, swellable and biodegradable polymers are vital materials that may facilitate the different stages of wound healing. The aim of this research was to prepare wound healing films using self-healing polyvinyl alcohol (PVA), swellable hydroxypropyl methylcellulose (HPMC), biodegradable polyglycolic acid (PGA) sutures and ciprofloxacin antibiotic for improved treatment outcome. Methods: Films were formulated through aqueous-based mixing of varying amounts of polyvinyl alcohol (10–20% weight/weight (w/w)) and hydroxypropyl methylcellulose (0.5, 1% w/w) with fixed quantities of ciprofloxacin. PGA sutures were placed as grids within the wet mixtures of the polymers and ciprofloxacin, and thereafter products were air dried. The formulated films were evaluated for swelling ratio, breaking elongation, folding endurance, moisture uptake and loss, compatibility and in vitro antibiotic release. Furthermore, in vivo wound healing was studied using excision model and histopathological examinations. Results: Swelling ratios were above 1.0 and the films were minimally stretchable, with folding endurance greater than 500. Films were stable while moisture uptake and loss were observed to be less than 30%. Among the optimised hydrogel batches, those containing 10% w/w PVA and 1% w/w HPMC with no PGA showed the highest drug release of 73%, whereas the batches with higher PGA content showed higher percentage wound size reduction with minimal scar. The completeness of wound healing with batches containing PVA, HPMC, ciprofloxacin and PGA, along with the standard, is evident considering the massive cornification, regeneration of the epithelial front and stratum spinosum. Conclusion: The findings show that polymer-based multifunctional composite films are suitable for use as dressings for improved wound healing.

Preparation and arachnicide of polyvinyl alcohol/starch/ginger oils composite films

2018 ◽  
Author(s):  
Yeni Yeni ◽  
Anisa Selfiana ◽  
Wiwit Nurjanah ◽  
Muhammad Arsyik Kurniawan
Keyword(s):  
Polyvinyl Alcohol ◽  
Composite Films

scholarly journals Improvement in Photochromic Property of Nickel Oxide-Based Photochromic Composite Films by Cobalt Addition

2017 ◽  
Vol 7 (1) ◽  
pp. 9
Author(s):  
Hidetoshi Miyazaki ◽  
Narumi Eimori ◽  
Takahiro Matsuura ◽  
Toshitaka Ota
Keyword(s):  
Nickel Oxide ◽  
Composite Films ◽  
Photochromic Property ◽  
Particle Sizes ◽  
Photochromic Properties ◽  
Cobalt Nickel ◽  
Co Addition ◽  
Cobalt Addition

Nickel oxide (NiO)-based composite films with various Cobalt/Nickel (Co/Ni) ratios were fabricated, and the photochromic properties of the resulting films were evaluated. The NiO particle sizes in the composite films with Co/Ni ratios of 0~0.02 were 40~70 nm. Increase in the Co addition ratio to the composite films caused a decrease in the initial transmittance of the films, and the films with Co/Ni ratio of 0.005 and 0.01 showed a larger transmittance modulation. Co addition caused an increase in the bleaching and coloring rates, which were the largest in the film with Co/Ni ratio of 0.005.

Structure and photochromic properties of molybdenumphosphoric acid/TiO2 composite films

2009 ◽  
Vol 52 (2) ◽  
pp. 169-173 ◽  
Author(s):  
He Qi ◽  
Yan Liu ◽  
Wei Feng ◽  
YiMin Zhu
Keyword(s):  
Composite Films ◽  
Photochromic Properties
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