聚乳酸/聚己内酯涂布纸基透水材料的性能  

Properties of Polylactic Acid/Polycaprolactone Coated Paper-Based Water Permeable Materials

作　　者：欧章明 窦文芳 王慧[1] 薛奎 刘泽华[1] OU Zhangming;DOU Wenfang;WANG Hui;XUE Kui;LIU Zehua(Tianjin Key Laboratory of Pulping and Papermaking,College of Light Industry Science and Engineering,Tianjin University of Science&Technology,Tianjin 300457,China)

机构地区：[1]天津市制浆造纸重点实验室,天津科技大学轻工科学与工程学院,天津300457

出　　处：《天津科技大学学报》2022年第4期30-36,共7页Journal of Tianjin University of Science & Technology

摘　　要：采用聚己内酯(PCL)对聚乳酸(PLA)进行共混改性后得到的PLA/PCL二元共混涂布液对以旧瓦楞纸箱为纤维原料的纸板基材表面进行喷雾涂布,形成纸基复合材料,即得到一种新型的纸基透水材料.探究PLA/PCL涂布量对材料干、湿状态下的抗张指数,拉伸伸长率,疏水性,水蒸气透过速率的影响.结果表明:经PLA/PCL涂布处理得到的复合材料的湿强度明显提高,湿强度保留率从32%提高到50.8%;复合材料具有良好的疏水性能,涂布量为25 g/m^(2)时的接触角达到104.3°,涂布量达到10 g/m^(2)以上时,材料吸水量由原先的50.8%降低到15.9%以下;喷雾涂布后,复合材料的水蒸气透过速率降低,在涂布量为20 g/m^(2)时较未涂布纸板基材降低25%;涂布量为25 g/m^(2)的材料可以低速率稳定透水40 d以上.Polylactic acid(PLA)was blended with polycaprolactone(PCL).The PLA/PCL binary blend coating solution was sprayed on the surface of the cardboard substrate made from the old corrugated carton to form paper-based composites.Thus a new type of paper-based permeable material was obtained.The effects of PLA/PCL coating amount on the dry and wet tensile strength,tensile elongation,hydrophobicity,and water vapor transmission rate of the materials were investigated in this study.The results showed that the wet strength of the composites coated with PLA/PCL was significantly improved,and the wet strength retention rate was increased from 32%to 50.8%.The composite material had good hydrophobic property,and the contact angle reached 104.3°when the coating amount was 25 g/m^(2).When the coating amount was above 10 g/m^(2),the water absorption of the material decreased from 50.8%to below 15.9%.After spray coating,the water vapor transmission rate of the composite material decreased,which was 25%lower than that of uncoated paper-based material when the coating amount was 20 g/m^(2).The material with a coating amount of 25 g/m^(2) could permeate steadily at a low rate for more than 40 days.

关 键 词：聚乳酸/聚己内酯 纸基透水材料 高湿强度 疏水性 透湿性能 

分 类 号：TS762.2[轻工技术与工程—制浆造纸工程]