陈晨伟,陈柚吉,许哲玮,马亚蕊,刘晋良,谢晶.微晶纤维素改性对聚乙烯醇薄膜性能的影响[J].包装工程,2017,38(9):85-90.
CHEN Chen-wei,CHEN You-ji,XU Zhe-wei,MA Ya-rui,LIU Jin-liang,XIE Jing.Effect of Modified Microcrystalline Cellulose on Properties of Poly-(vinyl alcohol) Film[J].Packaging Engineering,2017,38(9):85-90. |
| 微晶纤维素改性对聚乙烯醇薄膜性能的影响 |
| Effect of Modified Microcrystalline Cellulose on Properties of Poly-(vinyl alcohol) Film |
| 投稿时间：2016-07-18 修订日期：2017-05-10 |
| DOI： |
| 中文关键词: 微晶纤维素 聚乙烯醇 薄膜 力学性能 |
| 英文关键词: microcrystalline cellulose poly-(vinyl alcohol) film mechanical property |
| 基金项目: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）；上海市大学生创新项目（A1-2042-16-0003）；上海海洋大学骆肇荛科技创新项目（A1-0204-00-1033） |
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| 中文摘要: |
| 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 cm3•cm/(cm2•s•Pa)降低到1.393×10-16 cm3•cm/(cm2•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。 |
| 英文摘要: |
| The work aims to research the effect of microcrystalline cellulose (MCC) with different concentrations on the properties of poly-(vinyl alcohol) film. The PVA films containing MCC with different concentrations (0%, 1%, 2%, 3% and 4% of PVA weight) were prepared by solution casting method. The effect of microcrystalline cellulose (MCC) with different concentrations on the properties of poly-(vinyl alcohol) film was detected and analyzed, including color, optical property, mechanical property, barrier property, thermal stability and topographical microstructure. With the increasing concentration of MCC, the light transmittance and elongation at break of the PVA films decreased significantly, and the haze and tensile strength increased significantly. Compared with the pure PVA film, the tensile strength of the PVA film containing 4% MCC increased by 64.8% and the elongation at break decreased by 14.7%. The water vapor transmission coefficient of the PVA films decreased significantly. When the concentration of MCC increased from 0% to 3%, the oxygen transmission coefficient of the PVA films decreased from 2.145×10-16 cm3•cm/(cm2•s•Pa) to 1.393×10-16 cm3•cm/(cm2•s•Pa). However, the oxygen transmission coefficient of the PVA film containing 4% MCC increased slightly. The thermal stability of PVA films was improved and their initial decomposition temperatures slightly increased with MCC added to the films. The agglomeration of large particles on the surface and part of the cross section of the PVA film containing 4% MCC was observed. The mechanical property, hydrophobicity, barrier property and thermal stability are improved by incorporating MCC in the PVA films. The properties of the PVA films can be improved effectively by properly controlling the addition of MCC. |
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