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菠萝叶纤维素膜制备工艺优化
作者: 魏晓奕1  杨 琴2   祝 晓1  常 刚1  付调坤1  向佳晴1  冯 芹3  李积华1  
单位: (1 中国热带农业科学院 农产品加工研究所  广东 湛江 524001;2 农业部规划设计研究院  北京 100125;  
关键词: 菠萝叶  纤维素膜  离子液体  相转化法  成膜性能  
分类号:S563.9
出版年,卷(期):页码:2016 ,47 ( 1 ): 页码:101-106
摘要:

【目的】优化菠萝叶纤维素膜制备工艺,为菠萝叶纤维的高值化利用提供参考依据。【方法】利用乳化剪切方式使菠萝叶纤维素溶解在离子液体中,采用相转化法制备菠萝叶纤维素膜,并考察溶剂种类、甘油浓度、干燥方式、再生温度、再生时间等因素对纤维素膜力学性能及微观结构的影响。【结果】优化后的菠萝叶纤维素膜制备工艺条件为:25 g菠萝叶纤维素/离子液体均相溶液,浸入5 ℃的1.5%甘油水溶液中,浸泡16 h后真空干燥,此条件下制得的纤维素膜力学性能较好,拉伸强度为44.01 MPa、断裂伸长率为3.13%,膜表面平整致密,且有孔状结构。【结论】采用乳化剪切和相转化法在优化条件下制得的纤维素膜具有良好的力学性能和微观结构,为研发新型可降解膜材料开辟了新途径。

【Objective】In order to provide technical references for improving high-value utilization of pineapple leaf cellulose, the preparation process of cellulose membrane was optimized using pineapple leaf as raw materials. 【Method】 The pineapple leaf cellulose was dissolved in ionic liquid by emulsification treatment, then the phase inversion method was used to prepare cellulose membrane. The influences of main factors on mechanical properties and structure of cellulose membrane were investigated, such as solvent type, glycerol concentration, drying method, regeneration temperature and regeneration time. 【Result】The optimal process conditions was as follows: 25 g pineapple leaf cellulose/ionic liquid homogenous solution was immersed in 1.5% glycerin solution for 16 h at 5 ℃, then, dried in vacuum drying oven. Under the above optimum conditions, the cellulose membrane showed that better mechanical properties, the tensile strength reached up to 44.01 MPa, and the elongation at break was up to 3.13%, the membrane surface was smooth, dense and porose. 【Conclusion】The cellulose membrane with great mechanical properties and microstructure can be prepared under optimized conditions of emulsification and inversion methods, so as to provide a new path for developing novel biodegradable membrane materials.

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