微晶纤维素改性对聚乙烯醇薄膜性能的影响

发布时间：2018-03-01 16:45

本文关键词： 微晶纤维素聚乙烯醇薄膜力学性能　出处：《包装工程》2017年09期 　论文类型：期刊论文

【摘要】：目的研究不同添加量的微晶纤维素(MCC)对聚乙烯醇(PVA)薄膜性能的影响。方法通过共混溶液流延法制备得到MCC质量分数不同(0%,1%,2%,3%,4%)的PVA薄膜,测定分析MCC含量不同对PVA薄膜的颜色、光学性能、力学性能、阻隔性能、热稳定性和表面微观形态的影响。结果随着MCC含量的增加,PVA薄膜的透光率和断裂伸长率显著降低,雾度和抗拉强度显著增加,与纯PVA薄膜相比,MCC质量分数为4%的PVA薄膜的抗拉强度增加了64.8%,断裂伸长率降低了14.7%,水蒸气透过系数显著降低。当MCC质量分数从0%增加到3%时,薄膜的氧气透过系数由2.145×10~(-16) cm~3·cm/(cm~2·s·Pa)降低到1.393×10~(-16) cm~3·cm/(cm~2·s·Pa),但当MCC质量分数为4%时,薄膜的氧气透过系数略有增加。MCC的加入使得薄膜的热稳定性提高,初始分解温度略有升高,当MCC质量分数为4%时,薄膜表面和横截断面局部区域可以观察到少量的大颗粒出现团聚现象。结论 MCC的加入提高了PVA薄膜的力学性能、疏水性、阻隔性、热稳定性,控制好其加入量可以有效改善PVA薄膜的性能。
[Abstract]:Objective to study the effect of different amount of microcrystalline cellulose on the properties of polyvinyl alcohol (PVA) films. Methods the PVA films with different MCC mass fraction were prepared by solution flow extension method. The color of PVA films with different MCC content was determined and analyzed. The effects of optical properties, mechanical properties, barrier properties, thermal stability and surface micromorphology. Results with the increase of MCC content, the transmittance and elongation at break decreased significantly, and the fog and tensile strength increased significantly. Compared with pure PVA films, the tensile strength of PVA films with mass fraction of 4% increases by 64.8%, elongation at break decreases by 14.7and the water vapor transmittance decreases significantly. When the mass fraction of MCC increases from 0% to 3, the tensile strength of PVA films increases from 0% to 3. The oxygen transmittance of the films decreased from 2.145 脳 10 ~ (-16) cm~3 路cm/(cm~2 路s 路Pa) to 1.393 脳 10 ~ (-1) cm~3 路cm/(cm~2 路s 路Pa.However, when the mass fraction of MCC was 4, the oxygen transmittance of the films increased slightly. When the mass fraction of MCC is 4, a small amount of large particles can be observed in the local area of the film surface and cross-section. Conclusion the addition of MCC can improve the mechanical properties, hydrophobicity, barrier and thermal stability of PVA films. The properties of PVA films can be effectively improved by controlling the addition amount.
【作者单位】：上海海洋大学;上海水产品加工及贮藏工程技术研究中心;
【基金】：国家重点研发计划(2016YFD0400106) 上海市科委工程中心能力提升项目(16DZ2280300) 上海市高校青年教师培养资助计划(B-5409-13-0014) 上海海洋大学科技发展专项(A2-0203-00-100218);上海海洋大学骆肇荛科技创新项目(A1-0204-00-1033) 上海市大学生创新项目(A1-2042-16-0003)
【分类号】：TQ325.9;TB383.2

【相似文献】