海藻酸钠-羟乙基纤维素可降解复合膜制备和性能  

Preparation and performance of sodium alginate-hydroxyethyl cellulose biodegradable composite film

作　　者：陈茹 宋静辉 李帅 邢振飞 张鑫 曹新苗 赵广泰 姜鹤 尹忠状 CHEN Ru;SONG Jinghui;LI Shuai;XING Zhenfei;ZHANG Xin;CAO Xinmiao;ZHAO Guangtai;JIANG He;YIN Zhongzhuang(School of Textile and Materials Engineering,Dalian Polytechnic University,Dalian 116034,Liaoning Province,China;Shanghai Lelang Testing Technology Co.,Ltd.,Shanghai 201201,China)

机构地区：[1]大连工业大学纺织与材料工程学院,辽宁大连116034 [2]上海乐朗检测技术有限公司,上海201201

出　　处：《化学工程》2024年第2期72-77,88,共7页Chemical Engineering(China)

基　　金：绿色轻工材料湖北省重点实验室开放基金资助项目(201611B14)。

摘　　要：为制备性能优异的SA(海藻酸钠)可降解复合膜,以HEC(羟乙基纤维素)为增强组分,采用浇铸法制备一系列不同SA与HEC质量比的可降解复合膜,然后利用Ca^(2+)进行交联处理,并采用土埋法进行降解实验。通过FTIR、SEM、TGA、UV/VIS/NIR等对其组成结构、力学性能等进行测试与表征。结果表明:HEC的加入极大改善了SA膜质脆易皱缩的特点,复合膜的力学性能优异,韧性和透明度良好,耐热和疏水性能也有显著提升。明确了最佳实验条件,当SA与HEC质量比为4∶1时,膜的拉伸断裂强度为64.6 MPa,断裂伸长率为3.62%,水接触角为63.3°,氧气透过量为(2.54±0.056) cm^(3)/(cm^(2)·d·MPa),可见光透过率为33.3%—52.9%,并具有良好的可降解性。因此,以HEC为增强组分制备的SA复合膜具有良好的力学性能和降解性能,可应用于食品包装领域。To prepare SA(sodium alginate)biodegradable composite film with excellent performance,a series of biodegradable composite films with different mass ratios of SA to HEC(hydroxyethyl cellulose)were prepared by casting method.HEC was used as reinforcing component.Then the composite filins were cross-linked using Ca^(2+),and degradation experiments were carried out by soil burial method.The performance such as composition structure and mechanical properties were tested and characterized by FTIR,SEM,TGA and UV/VIS/NIR.The results show that the characteristics of the SA film,which is brittle and prone to wrinkling,are greatly improved by the addition of HEC.The composite film has excellent mechanical properties,good toughness and transparency as well as significantly improved heat and hydrophobic properties.The optimum experimental conditions are determined.When the mass ratio of SA to HEC is 4∶1,the tensile breaking strength of the film is 64.6 MPa,the elongation at break is 3.62%,the water contact angle is 63.3°,the oxygen transmission is(2.54±0.056)cm^(3)/(cm^(2)·d·MPa),the visible light transmission is 33.3%-52.9%,and it has excellent degradability.Therefore,the SA composite film prepared with HEC as the reinforcing component has excellent mechanical and degradation properties and can be used in the food packaging field.

关 键 词：海藻酸钠 羟乙基纤维素 浇铸法 可降解复合膜 

分 类 号：TB332[一般工业技术—材料科学与工程]