王志国,蒋 杰,司玉丹,范一民.纤维素纳米纤维对聚乙烯醇复合膜性能的影响[J].中国造纸学报,2017,32(4):27-31 |
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纤维素纳米纤维对聚乙烯醇复合膜性能的影响 |
Effect of Cellulose Nanofibers on the Property of Cellulose Nanofiber/Polyvinyl Alcohol Composite Film |
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DOI:10.11981/j.issn.1000-6842.2017.04.27 |
中文关键词: 纳米纤维素 复合膜 聚乙烯醇 高强度 拉伸性能 |
Key Words:cellulose nanofiber composite film polyvinyl alcohol high strength tensile property |
基金项目:国家林业公益性行业科研专项(201304609);中国博士后科学基金资助项目(164845)。 |
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中文摘要: |
采用TEMPO氧化法制得直径4~10 nm,长径比达100以上的蔗渣纤维素纳米纤维(CNF),并利用CNF与聚乙烯醇(PVA)制备CNF/PVA复合膜,研究了添加甘油或聚乙二醇(PEG-400)对CNF/PVA复合膜透光率及力学刚性性能的影响。结果表明,CNF/PVA复合膜能兼具纯CNF膜的高机械强度和纯PVA膜的高延展性,CNF含量为25%的CNF/PVA复合膜在400~700 nm波长范围内的透光率达90%以上,杨氏模量为4.72 GPa的同时断裂伸长率可达6.92%;添加甘油或PEG-400会降低膜的机械刚性而提高膜的拉伸性能,两者均会降低膜的透光度。 |
Abstract: |
Cellulose nanofibers (CNF) prepared from 2,2,6,6-tetramethylpiperidiine-1-oxyl (TEMPO) oxidized bagasse pulp had large aspect ratio with diameters of 4~10 nm. Polyvinyl alcohol (PVA) was mixed with CNF to prepare CNF/PVA composite film, and the effects of glycerol and polyethylene glycol-400 (PEG-400) on light transmittance and mechanical properties of CNF/PVA film were studied. The application of pure CNF or PVA film was limited by their unsatisfied mechanical properties. The results showed that CNF/PVA film had both high mechanical strength and extensibility. The film containing 25% CNF had high light transmittance (>90%) in 400~700 nm, high Young’s modulus of 4.72 GPa and elongation at break of 6.92%. The light transmittances of the composite film declined with the addition of either glycerol or PEG-400. The glycerol and PEG-400 made the film more flexible but less stiff. |
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