【作者】 唐丽荣； 黄彪； 戴达松； 欧文； 陈燕丹； 陈学榕；

【Author】 TANG Li-rong, HUANG Biao, DAI Da-song, OU Wen,CHEN Yan-dan, CHEN Xue-rong College of Material Engineering,Fujian Agriculture and Forestry University,Fuzhou 350002,China

【机构】 福建农林大学材料工程学院；

【摘要】 采用硫酸水解微晶纤维素制备了纳米纤维素晶体,应用溶液共混法制备了纳米纤维素晶体/聚乙烯醇复合膜材料,对纳米纤维素晶体的改性增强作用进行了研究。研究采用原子力显微镜、XRD及热重分析仪等对纳米纤维素及其复合膜材料的微观结构、分散性、力学及热学等性能进行了分析与表征。结果表明:所制得的纳米纤维素晶体直径约为10～40nm,长度为100～400nm;纳米纤维素晶体与聚乙烯醇基体具有良好的相容性,纳米纤维素晶体的加入可明显提高复合膜材料的力学性能,当NCC添加量为0.5%时,复合膜材料拉伸强度为51MPa,较纯PVA膜提高45.7%。而且随着纳米纤维素晶体添加量的增加,复合膜材料的热稳定性增大。更多还原

【Abstract】 Nanocellulose crystal (NCC) was prepared from Microcrystalline cellulose (MCC) by sulfuric acid treatment. Polyvinyl alcohol(PVA) composite films were prepared by adding NCC into a PVA matrix at different loading levels. The microstructure, dispersion, mechanical and thermal properties of NCC and composite films were characterized by Atomic force microscopy, X-ray diffraction, thermogravimetric analysis and so on. The results show that the diameter of NCC is about 10-40nm, with the length 100-400nm. NCC also has homogeous dispersion in the polymer matrix. PVA films reinforced by nanocellulose crystal exhibit improved mechanical properties as compared to the neat PVA film. When the NCC content is only 0.5%, the tensile strength of composite film incresess 45.7% compared to the neat PVA film, being up to 51MPa. The thermal stability of the PVA composite films slightly increases when NCC is added.更多还原