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分别以微晶纤维素、脱脂棉和漂白芦苇浆为原料,硫酸水解法制备纳米纤维素(NCC),与聚乙烯醇(PVA)简单共混流延成膜法制备NCC/PVA复合膜。m(NCC)/m总为7%时制备NCC/PVA复合膜,红外光谱分析结果表明复合膜中PVA分子链和NCC分子链间存在能提高两者相容性的氢键缔合作用力;热重分析结果表明复合膜的热稳定性与NCC热稳定性基本一致。扫描电子显微镜分析结果表明m(NCC)/m总为0.5%时制备NCC/PVA复合膜的表面和断面较为规整。3种原料中漂白芦苇浆NCC长径比最高(约为25),且m(NCC)/m总为0.5%时制备NCC/PVA复合膜拉伸强度最大,较PVA膜拉伸强度提高40.8%。3种原料NCC分别制备的3种NCC/PVA复合膜断裂伸长率,均较PVA膜断裂伸长率降低。随着m(NCC)/m总的增加,NCC/PVA复合膜透光率较PVA膜透光率降低;3种原料中微晶纤维素NCC/PVA复合膜透光率较PVA膜透光率降低最小。
Microcrystalline cellulose, cotton wool and bleached reed pulp were respectively used as raw materials, and NCC / PVA composite films were prepared by simply blending and casting film-forming method with sulfuric acid hydrolysis method and nano-cellulose (NCC) respectively with polyvinyl alcohol (PVA). The NCC / PVA composite films were prepared with m (NCC) / m of 7%. The results of FTIR spectroscopy showed that there existed hydrogen bonding interaction force between the PVA molecular chains and the NCC molecular chains in the composite films. The reanalysis results show that the thermal stability of the composite membrane is basically the same as that of NCC. Scanning electron microscopy analysis showed that the surface and cross section of the NCC / PVA composite membrane were more regular when the total amount of m (NCC) / m was 0.5%. The NCC / PVA composite films with the highest N / N ratio (about 25) and the m (NCC) / m total of 0.5% showed the highest tensile strength and the tensile strength of the NCC / PVA composite films increased by 40.8% . The elongation at break of the three kinds of NCC / PVA composite films prepared from the three kinds of raw materials, NCC, respectively, were lower than the elongation at break of the PVA film. With the total increase of m (NCC) / m, the transmittance of NCC / PVA composite film was lower than that of PVA film. The transmittance of microcrystalline cellulose NCC / PVA composite film was higher than that of PVA film Minimize.