CMC取代度对水溶性SA/CMC复合膜结构与性能的影响  

Degree of substitution of carboxymethyl cellulose effect on structure and properties of composite films of sodium alginate and carboxymethyl cellulose

作　　者：邓丰林 颜超[1] 崔莉[1] 刘云[1] 朱平[1,2,3] 张传杰[1,2] DENG Fenglin YAN Chao CUI Li LIU Yun ZHU Ping ZHANG Chuanjie(School of Chemistry and Chemical Engineering, Wuhan Textile University, Wuhan 430073, China State Key Laboratory of New Textile Materials and Advanced Processing, Wuhan Textile University, Wuhan 430073, China State Key Laboratory of New Fiber Materials and Modern Textile, Qingdao University, Qingdao 266071, China)

机构地区：[1]武汉纺织大学化学与化工学院,武汉430073 [2]武汉纺织大学纺织新材料及其先进加工技术国家重点实验室培育基地,武汉430073 [3]青岛大学纤维新材料及现代纺织国家重点实验室培育基地,山东青岛266071

出　　处：《功能材料》2016年第B06期174-178,184,共6页Journal of Functional Materials

基　　金：国家自然科学基金资助项目(51403160);湖北省教育厅中青年人才项目资助项目(Q20151607)

摘　　要：以4种不同取代度的CMC和SA为原料,采用溶液共混法制备SA/CMC复合膜,并通过红外、XRD、SEM及其它化学方法,研究CMC的取代度对其溶解性能、SA与CMC的相容性、以及SA/CMC复合膜的红外光谱、结晶结构、透光率、力学性能、阻氧性和水溶性等的影响。结果表明,SA与CMC之间具有范德华力和氢键等相互作用,4种取代度的CMC与SA均具有良好的相容性。随着CMC取代度的增加,溶液中的未溶解片段逐渐减少,复合膜的截面趋向于光滑、平整,且结晶度和透光率逐渐增加。随着CMC的取代度从0.4提高到0.9,复合膜的断裂强度从6.25 MPa提高到37.27 MPa,水溶时间从162s缩短至70s,而且复合膜的阻氧性能提高,油脂的过氧化值从4.2g/100g下降至1.9g/100g。Composite films of sodium alginate （SA）and four types of carbocymethyl cellulose （CMC）with dif-ferent degree of substitution （DS）were prepared by solution blending,and the effect of the DS on structure and properties of SA/CMC composite films was discussed.Van der waals forces and hydrogen bonding force among various functional groups of the component polymers of SA/CMC composite films was confirmed by their infra-red spectra,therefore,these two components of SA/CMC composite films were satisfactory compatibility.As the increase of DS,the mount of undissolved fragments in CMC solution gradually decrease,cross section of SA/CMC composite films tends to smooth and flat,and their crystallinity and transmittance slowly increase. The tensile strength of SA/CMC composite film increases to 37.27 MPa from 6.25 MPa,their dissolving time in distilled water declines to 70 s from 162 s,and peroxide value of oxidated oil reduces to 1.9 g/100 g from 4.2 g/100 g,while the DS of CMC increases to 0.9 from 0.4.

关 键 词：海藻酸钠 羧甲基纤维素钠 复合膜 水溶性 阻氧性 

分 类 号：TQ341.1[化学工程—化纤工业]