การผลิตฟิล์ม และสมบัติทางกายภาพของฟิล์มเซลลูโลสจากแบคทีเรีย-ไคโตแซน
Chitosan is the only of natural cationic polysaccharide which can be utilized in numbers of commercial applications. It was found that the adding of chitosan into aqueous cellulosic pulp suspension obtained either from hard wood or soft wood can improve the overall properties of the paper. However,...
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| Format: | Theses and Dissertations |
| Language: | Thai |
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จุฬาลงกรณ์มหาวิทยาลัย
2000
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| Online Access: | https://digiverse.chula.ac.th/Info/item/dc:36009 |
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| Institution: | Chulalongkorn University |
| Language: | Thai |
| Summary: | Chitosan is the only of natural cationic polysaccharide which can be utilized in numbers of commercial applications. It was found that the adding of chitosan into aqueous cellulosic pulp suspension obtained either from hard wood or soft wood can improve the overall properties of the paper. However, there is no research studying on the effects of applying chitosan to microfibril cellulose such as bacterial cellulose. The objectives of this study is to synthesize bacterial cellulose-chitosan film and characterize its properties. In this study, at a constant basis weight (30 g/m2) the mass of chitosan in the mixture of bacterial cellulose-chitosan were varied between 0 and 30 percent of dry bacterial cellulose and pH of the suspension were varied at 4.5, 7.0 and 10.0 and 1000. It was found that at 10 percent chitosan and pH 10, the film with the best properties. (of (at) 27 percent increased in dry tensile index, 42 percent increased in burst index, 35 percent increased in elongation, and 18 percent increased in water permeability, as compared to the chitosan-free film) However, the tear index of this film was found to be 32 percent poorer than that of the chitosan-free film. |
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