摘要纤维素及其衍生物作为常用的分离用的膜材料，来源十分广泛而且价格也相对较低。使用纤维素制膜的工艺也较简单，成膜的性能也良好，纤维素膜的选择性高，与水的亲和力好，容易生物降解等。本课题从制膜的原材料、纤维素溶解的反应过程、纤维素膜的产品性能等角度出发，进行纤维素再生膜材料的制备与研究，目的是开发出一种制膜工艺简单的、价格成本较低的、对环境无污染的、绿色的纤维素膜制备的方法。84318
本文用[EMIM][DEP]（1-乙基-3-甲基咪唑磷酸二乙酯盐）为溶剂溶解纤维素，制备了微晶纤维素膜、桑枝纤维素膜、竹枝纤维素膜、桑竹复合纤维膜、羧基纤维素膜以及羧基纤维素/丝素蛋白复合膜等膜材料，通过傅里叶红外扫描测试分析膜特征形态，测定了膜材料的吸水率、溶胀率及孔隙率等特性，结果表明：我们利用无水吡啶/琥珀酸酐体系对桑枝纤维素进行接枝反应，并对生成物进行红外表征，结果发现生成物在1726 cm-1处出现了羧基中的-C=O的伸缩振动吸收峰，而桑枝纤维素在此处并没有吸收峰。同时生成物的红外吸收曲线在3000-3600 cm-1处出现了一个大的宽峰，且吸收性强度大，其归属于羧基的O-H伸缩振动吸收峰，从而说明生成了新的羧基官能团，证明成功制得了羧基桑枝纤维素。碱处理桑枝粉的失重率随着NaOH浓度的增加而增加，当用16%的NaOH处理桑枝粉后，桑枝粉在[DMIM][DMP]中110℃溶解2h的溶解率已经达到了100%。证明在一定范围内，桑枝粉的溶解率随着碱处理桑枝粉的NaOH的浓度的增加而增加。通过测定制备的纤维膜发现，桑纤维/竹纤维复合纤维素膜和羧基桑枝纤维素膜的吸水率较高，桑纤维/竹纤维复合纤维素膜的吸水率为2。09（g/g），羧基桑枝纤维素膜的吸水率为7。1（g/g），表明吸湿性能好，可应用于食品、医疗等行业。制备的羧基桑枝纤维素膜和羧基桑枝纤维/丝素蛋白复合膜的溶胀率和孔隙率都较高，具有良好的对物质的截留能力和选择性，可应用与分离化工等领域。
毕业论文关键字：生物降解；丝素蛋白；纤维素；离子液体；纤维素膜；
Abstract Cellulose and its derivatives as the separation membrane materials, has the advantages of extensive sources, low price, membrane preparation process simple, good film performance, after the film with high selectivity, good hydrophilicity, large permeable capacity, easy biodegradation advantages。 This topic from the perspective of raw materials, reaction process, properties of the product of development of regenerated cellulose film material preparation of, the goal is to develop a is simple, economical and feasible, environmental pollution-free fiber micro membrane preparation method, with an extremely important application value。
In this paper, [EMIM][DEP] is used as solvent to dissolve cellulose, Prepared microcrystalline cellulose membrane, mulberry cellulose membrane, bamboo cellulose membrane, mulberry bamboo fiber composite membrane, carboxyl cellulose membrane and carboxyl cellulose/silk fibroin protein composite membrane membrane materials and tested by Fourier transform infrared scanning analysis of membrane morphology, membrane materials, water absorption rate, swelling rate and porosity characteristics were determined。 The results showed that:we use of cellulose in the dissolution process of the easier for other derivatization reaction characteristics were successfully prepared carboxylated mulberry cellulose。 By IR spectra analysis, carboxylated mulberry cellulose in 1726 cm-1 appeared in the carboxyl groups in the C = O stretching vibration absorption peaks, and mulberry cellulose here and no absorption peak。 The carboxyl content of infrared absorption curve of mulberry cellulose in the 3000-3600 cm-1 appeared a large broad peak and absorption intensity big, its ownership to carboxyl O-H stretching vibration absorption peak, so that generated new carboxyl groups that successfully prepared carboxyl mulberry cellulose。Alkali treatment of mulberry shoot powder weight loss rate with the increase of NaOH concentration and increased, when processing mulberry shoot powder with 16% NaOH, mulberry twig powder in [DMIM][DMP] dissolved two hour dissolution rate has reached 100%。 In a certain range, the dissolution rate of mulberry powder increased with the concentration of alkali treated mulberry shoot powder of NaOH。Through the preparation of fiber membrane were tested, mulberry/bamboo composite cellulose membrane and carboxyl groups of the mulberry cellulose membrane bibulous rate is higher, hygroscopicity good application in food, medical and other industries。 Prepared carboxylated mulberry cellulose membrane and carboxylated mulberry/silk fibroin membrane protein complex of the swelling ratio and the porosity is high, with good material retention ability and selectivity, application and chemical separation and other fields。 离子液体中纤维素成膜系统化的研究:http://www.youerw.com/shengwu/lunwen_99928.html