Hydrophobicity enhancement of the polyvinyl alcohol/rice starch/silk fibroin films by glycerol

Eco-friendly films have been prepared using various biopolymers and their properties have been improved in order to meet the requirements for appropriate applications. However, the frequently encountered weakness of the properties of most biopolymer film is its water solubility. In this study, the p...

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Main Authors: Pusita Kuchaiyaphum, Takeshi Yamauchi, Ruangsri Watanesk, Surasak Watanesk
Format: Book Series
Published: 2018
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http://cmuir.cmu.ac.th/jspui/handle/6653943832/53551
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Institution: Chiang Mai University
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spelling th-cmuir.6653943832-535512018-09-04T09:51:26Z Hydrophobicity enhancement of the polyvinyl alcohol/rice starch/silk fibroin films by glycerol Pusita Kuchaiyaphum Takeshi Yamauchi Ruangsri Watanesk Surasak Watanesk Engineering Eco-friendly films have been prepared using various biopolymers and their properties have been improved in order to meet the requirements for appropriate applications. However, the frequently encountered weakness of the properties of most biopolymer film is its water solubility. In this study, the polyvinyl alcohol/rice starch/silk fibroin (PVA/RS/SF) films were modified by the addition of glycerol aiming to increase the hydrophobicity of the films. Some properties of the modified films including water contact angle, degree of swelling and water solubility were compared with the unmodified PVA/RS/SF film. Results from the contact angle measurement showed that the films with glycerol could be transformed to be hydrophobic after soaking in ethanol medium. The increase in soaking time tends to increase the hydrophobicity of the films. However, at about 60 min soaking, the water contact angles on the films were quite constant with the values of about 107.9±5.2° comparing with 65.3±2.4° of the ethanol-untreated PVA/RS/SF films. In addition, the ethanol-treated glycerol-modified films also show higher degree of swelling with constant solubility and better mechanical properties. © (2014) Trans Tech Publications, Switzerland. 2018-09-04T09:51:26Z 2018-09-04T09:51:26Z 2014-01-01 Book Series 16627482 16609336 2-s2.0-84891069618 10.4028/www.scientific.net/AMM.446-447.360 https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=84891069618&origin=inward http://cmuir.cmu.ac.th/jspui/handle/6653943832/53551
institution Chiang Mai University
building Chiang Mai University Library
country Thailand
collection CMU Intellectual Repository
topic Engineering
spellingShingle Engineering
Pusita Kuchaiyaphum
Takeshi Yamauchi
Ruangsri Watanesk
Surasak Watanesk
Hydrophobicity enhancement of the polyvinyl alcohol/rice starch/silk fibroin films by glycerol
description Eco-friendly films have been prepared using various biopolymers and their properties have been improved in order to meet the requirements for appropriate applications. However, the frequently encountered weakness of the properties of most biopolymer film is its water solubility. In this study, the polyvinyl alcohol/rice starch/silk fibroin (PVA/RS/SF) films were modified by the addition of glycerol aiming to increase the hydrophobicity of the films. Some properties of the modified films including water contact angle, degree of swelling and water solubility were compared with the unmodified PVA/RS/SF film. Results from the contact angle measurement showed that the films with glycerol could be transformed to be hydrophobic after soaking in ethanol medium. The increase in soaking time tends to increase the hydrophobicity of the films. However, at about 60 min soaking, the water contact angles on the films were quite constant with the values of about 107.9±5.2° comparing with 65.3±2.4° of the ethanol-untreated PVA/RS/SF films. In addition, the ethanol-treated glycerol-modified films also show higher degree of swelling with constant solubility and better mechanical properties. © (2014) Trans Tech Publications, Switzerland.
format Book Series
author Pusita Kuchaiyaphum
Takeshi Yamauchi
Ruangsri Watanesk
Surasak Watanesk
author_facet Pusita Kuchaiyaphum
Takeshi Yamauchi
Ruangsri Watanesk
Surasak Watanesk
author_sort Pusita Kuchaiyaphum
title Hydrophobicity enhancement of the polyvinyl alcohol/rice starch/silk fibroin films by glycerol
title_short Hydrophobicity enhancement of the polyvinyl alcohol/rice starch/silk fibroin films by glycerol
title_full Hydrophobicity enhancement of the polyvinyl alcohol/rice starch/silk fibroin films by glycerol
title_fullStr Hydrophobicity enhancement of the polyvinyl alcohol/rice starch/silk fibroin films by glycerol
title_full_unstemmed Hydrophobicity enhancement of the polyvinyl alcohol/rice starch/silk fibroin films by glycerol
title_sort hydrophobicity enhancement of the polyvinyl alcohol/rice starch/silk fibroin films by glycerol
publishDate 2018
url https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=84891069618&origin=inward
http://cmuir.cmu.ac.th/jspui/handle/6653943832/53551
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