摘要
将明胶作为原料(基体),甘油作为增塑剂,羟甲基纤维素(Hydroxymethyl cellulose,HMC)作为增强相,制备一系列不同含量的HMC/明胶复合膜。置于5、15、25、35(±1)℃的环境中,测试其拉伸强度(tensile strength)、断裂伸长率(elongation at break)、水蒸气透过系数(water vapour permeability,WVP)、水溶性(water solubility)和失水率,研究温度对HMC/明胶复合膜性能的影响。结果表明,温度对复合膜的性能影响较大,当温度为35℃时,拉伸强度最大(28. 51~88. 98 MPa),但断裂伸长率较低(3. 7%~33. 8%);当温度为0℃时,拉伸强度最低(4. 79~28. 31 MPa),断裂伸长率较大(32. 9%~107. 8%)。因此,低温(0℃)时,断裂伸长率较大,但拉伸强度较小,高温时(35℃)则相反;在低温或常温时,WVP趋势差别均较小,当温度为35℃时,WVP值较大;随温度的升高,水溶性逐渐增加;由105℃时的失水率可知,1%的HMC/明胶复合膜的含水率最大,随着HMC的继续加入,含水量逐渐减小。
HMC/Gelatin composite membranes were prepared by blending method.Tensile strength,elongation at break,water adsorption,WVP and SEM were used to characterize the prepared samples in different temperature.The result was that different temperature had a great influence on the performance of the composite membrane.In 35℃(28.51~88.98 MPa)were better than others,but elongation at break(3.7%~33.8%)were lower than others.In 0℃(32.9%~107.8%)were better than others,but tensile strength(4.79~28.31 MPa)were lower than others.The elongation at break was higher and the tensile strength was lower,when the temperature was lower.And the high temperature was opposite.The WVP were as same as the smaller at low temperature or normal temperature after added HMC,and were larger at 35℃.The water adsorption rate of the sample membrane increased with temperature grew.The water loss rate at 105℃showed that the moisture content of the 1%HMC/gelatin composite membrane was the largest,and the water content decreased with the continued addition of HMC.
作者
杨斯乔
张净净
李海朝
YANG Siqiao;ZHANG Jingjing;LI Haichao(School of Chemistry and Chemical Engineering,Qinghai University for Nationalities,Xining,Qinghai 810007,China)
出处
《塑料》
CAS
CSCD
北大核心
2020年第3期102-106,共5页
Plastics
基金
青海省自然科学基金(2015-ZJ-909,2019-ZJ-928)。
关键词
羟甲基纤维素
明胶
温度
水蒸气透过率
水溶性
力学性能
hydroxymethyl cellulose
gelatin
temperature
water vapour permeability
water solubility
mechanical properties
