摘要
聚乙烯醇(PVA)与紫胶树脂(SLR)均为易成膜树脂,且二者主要作为膜制品来应用。为改善SLR成膜后水汽渗透性差、脆性高等特性,特增加PVA,且分别以ω(PVA)为0%、10%、20%、30%、40%、50%时与SLR进行水相共混成膜,着重研究了二者成膜的可行性并确定了其成膜工艺:分别制备SLR水乳液和PVA水溶液,并将二者于50℃条件混合均匀,最后将液体倒入培养皿中,干燥、成膜。对成膜样品分别进行了表面形态观测、水静滴接触角分析、吸湿性测定,结果表明:PVA和SLR具有一定的物理相容性,PVA的加入提高了SLR膜的致密性,且随着PVA含量的增加,PVA/SLR膜的致密性增加,二者发生化学反应的程度较低;PVA质量分数最高时[本研究中ω(PVA)为50%]的PVA/SLR膜亲水性最强、吸湿性最大,表明PVA的加入改善了SLR的亲水性,且PVA的加入量越大,膜的亲水性、吸湿性增加的程度越大。
Both PVA and shellac resin are easy to form film,and both of them are mainly used in membrane products.In order to improve the poor water vapor permeability and high brittleness of shellac resin after film formation,PVA was specially added and blended with shellac resin in aqueous phase whenω(PVA)was 0%,10%,20%,30%,40%and 50%,respectively.The feasibility of the two films was studied and the film forming process was determined:preparing shellac resin aqueous emulsion and PVA aqueous solution respectively,and mixing them evenly at 50℃.Finally,pour the liquid into the petri dish,dry and form a film.The surface morphology,water drop contact angle and hygroscopicity of the film-forming samples were measured respectively.The results show that PVA and shellac resin have certain physical compatibility,and the addition of PVA improves the compactness of shellac resin membrane,and with the increase of PVA content,the compactness of PVA/shellac resin membrane increases,and the degree of chemical reaction between them is low.When the mass fraction of PVA was the highest[ω(PVA)50%],the hydrophilicity and hygroscopicity of PVA/shellac resin membrane were the strongest,which indicated that the addition of PVA improved the hydrophilicity of shellac resin,and the greater the amount of PVA added,the greater the hydrophilicity and hygroscopicity of the membrane.
作者
冀浩博
张弘
唐保山
JI Haobo;ZHANG Hong;TANG Baoshan(Department of Science and Technology,Kunming Metallurgy College,Kunming 650033,China;Institute of Highland Forest Science,Chinese Academy of Forestry,Kunming 650233,China)
出处
《昆明冶金高等专科学校学报》
CAS
2023年第6期31-38,共8页
Journal of Kunming Metallurgy College
基金
云南省教育厅科学研究基金项目“紫胶树脂与聚乳酸的共混改性研究”(2023J1528)。
关键词
紫胶树脂
聚乙烯醇
膜
物理共混
吸湿性
亲水性
shellac resin
polyvinyl alcohol
membrane
physical blending
hygroscopicity
hydrophilicity
作者简介
冀浩博(1986-),男,内蒙古乌兰察布人,讲师,工程硕士,主要从事天然产物化学研究。
