偶联改性棉花纳米纤维素/聚己内酯复合材料的非等温结晶性能及疏水性能研究  

Study on Non-isothermal Crystallization and Hydrophobic Properties of Couped Modified Cotton Nanocellulose/Polycaprolactone Composites

作　　者：李仁焕 庞锦英 LI Renhuan;PANG Jinying(Department of Scientific Research and Discipline Development,Nanning University,Nanning 530029,China;Guangxi Key Laboratory of Natural Polymer Chemistry and Physics,College of Chemistry and Materials,Nanning Normal University,Nanning 530001,China)

机构地区：[1]南宁学院科研与学科建设处,广西南宁530299 [2]南宁师范大学化学与材料学院,广西天然高分子化学与物理重点实验室,广西南宁530001

出　　处：《化工技术与开发》2022年第5期4-9,13,共7页Technology & Development of Chemical Industry

基　　金：广西高校中青年教师科研基础能力提升项目(2020KY64013)。

摘　　要：以3-氨丙基三乙氧基硅烷(KH550)为偶联剂,对棉花纳米纤维素(CNF)进行表面改性,再将偶联改性的棉花纳米纤维素与聚己内酯共混,通过溶液浇铸,制得偶联改性棉花纳米纤维素/聚己内酯复合材料(cCNF/PCL)。通过FT-IR、DSC、TG、CA(偏光显微镜)等表征手段,探索cCNF的加入量对PCL复合材料性能的影响。结果表明,添加微量的cCNF到PCL中,对羧基(-OH)的伸缩强度只有微弱的影响,cCNF降低了PCL的结晶度,且cCNF含量增加时,其复合材料的结晶温度随之升高,结晶度逐渐下降。cCNF/PCL在350℃开始分解,420℃时达到最大分解速率,475℃时基本完成分解。cCNF的添加量为0.375%时,cCNF/PCL复合材料的接触角为67.5°,比纯PCL降低10.0°。The surface modification of cotton nanocellulose(CNF)was carried out with 3-aminopropyl triethoxysilane(KH550)as coupling agent,the cotton nanocellulose/polycaprolactone composite(cCNF/PCL)was prepared by blending the coupling modified cotton nanocellulose with polycaprolactone through solution casting.FT-IR,DSC,TG,CA(polarized light microscope)and other characterization methods were used to explore the influence of the amount of cCNF on the properties of PCL composites.The results showed that the addition of trace cCNF to PCL had only a slight effect on the stretching strength of carboxyl group(-OH),and cCNF reduced the crystallinity of PCL.With the increase of cCNF content,the crystallization temperature of the composites increased and the crystallinity decreased gradually.cCNF/PCL decomposition began at 350℃,reached the maximum decomposition rate at 420℃,and basically completed decomposition at 475℃.When the content of cCNF was 0.375%,the contact Angle of cCNF/PCL composite was 67.5°,which was 10.0°lower than that of pure PCL.

关 键 词：聚己内酯 棉花纳米纤维素 偶联改性 复合材料 

分 类 号：TB332[一般工业技术—材料科学与工程]