中国塑料 ›› 2019, Vol. 33 ›› Issue (10): 28-34.DOI: 10.19491/j.issn.1001-9278.2019.10.006

• 材料与性能 • 上一篇    下一篇

温度对甲壳素/明胶复合膜的影响

杨斯乔,李海朝   

  1. 青海民族大学化学与化工学院
  • 收稿日期:2019-05-04 修回日期:2019-05-29 出版日期:2019-10-26 发布日期:2019-10-25
  • 基金资助:

    青海省自然科学基金(2015-ZJ-9092019-ZJ-928


Effect of Temperature on Properties of Gelatin/Chitin Composite Membranes

YANG Siqiao, LI Haichao   

  1. (School of Chemistry and Chemical Engineering,Qinghai University for Nationalities, Xining 810007,China
  • Received:2019-05-04 Revised:2019-05-29 Online:2019-10-26 Published:2019-10-25
  • Contact: LI Haichao E-mail:lihaichao@vip.163.com

摘要: 用明胶为原料(基体),以甘油作为增塑剂,甲壳素作为增强相,制备一系列不同含量的甲壳素/明胶复合膜。在5、20、35(±1) ℃环境之中,测试其拉伸强度、断裂伸长率、水蒸气透过系数(WVP)、水溶性和失水率,探究温度对甲壳素/明胶复合膜的影响。结果表明,温度对复合膜的性能影响较大,35 ℃时拉伸强度为77.34~44.44 MPa,但断裂伸长率较低(13.35 %~2.75 %),5 ℃时拉伸强度为6.06~4.75 MPa,断裂伸长率为111.4 %~64.2 %,低温时断裂伸长率较大,但拉伸强度较小,高温则相反;WVP随温度的升高而逐渐增加;水溶性随温度的升高而逐渐增大;甲壳素含量越大,复合膜内的水分子含量越少。

关键词: 甲壳素, 明胶, 温度, 水溶性, 力学性能

Abstract: Chitin/Gelatin composite membranes were prepared by a blending method, and their morphology, tensile properties, water adsorption, water vapor permeability coefficient and water solubility and water loss rate were investigated extensively. The result indicated that the tensile strength of the composite membranes was greatly affected by temperature. The composite membranes achieved the tensile strength of 77.34~44.44 MPa and the elongation at break of 13.35 %~2.75 % at 35 ℃, whereas they obtained the tensile strength of 6.06~4.75 MPa and the elongation at break of 111.4 %~64.2 % at 5 ℃. This result indicated that a high temperature facilitated to gain the high tensile strength and a low temperature favored the high elongation at break. The composite membranes showed an increase in water vapor permeability coefficient with an improvement of temperature. Moreover, the increase of chitin content resulted in a decrease of water content in the composite membranes.

Key words: gelatin, chitin, temperature, water solubility, mechanical property

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