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以茶树品种金萱的鲜叶新梢为原料,通过杀青、烘干、脱色、去除木质素与半纤维素,干燥粉碎后制得纤维素,然后用1-烯丙基-3-甲基咪唑盐酸盐作为溶剂,用加热搅拌方法制备出水凝胶。通过傅立叶红外光谱扫描、扫描式电子显微镜观察与质构分析等方法对水凝胶进行表征,并研究了水凝胶的平衡润胀率,用水杨酸钠作为模型药物分子的平衡载药率和释放率。实验发现:不同嫩度的茶叶纤维及其水凝胶在结构上差异较小;水凝胶在制备过程中,对应的纤维素均与离子液体发生了相互作用,产生的水凝胶主要组成属于再生纤维;叶梗水凝胶的凝胶特性、质构特性在5组样品中最优;二叶纤维所制备的水凝胶的平衡润胀率最高;而对水杨酸钠的平衡载药率与释放率则以成熟叶纤维制备的水凝胶最高。
Using the fresh shoots of tea tree variety Jin Xuan as raw material, the lignin and hemicellulose are removed by fixing, drying and decolorizing, and the cellulose is prepared by drying and crushing, then the cellulose is prepared by using 1-allyl-3-methylimidazole Hydrochloride as a solvent, a hydrogel was prepared by heating and stirring. The hydrogels were characterized by Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM) and texture analysis. The equilibrium swelling rate of hydrogels was also investigated. The equilibrium drug loading rate was calculated by sodium salicylate Release rate. The experimental results showed that tea fiber and its hydrogels with different tenderness had little difference in structure; during the preparation of hydrogel, the corresponding cellulose interacted with ionic liquid, the main components of hydrogel produced belonged to Regenerated fiber. The gel properties and texture properties of leaf stem hydrogels were the best among the five samples. The equilibrium swelling rate of the hydrogels prepared from the two-leaf fibers was the highest. However, the equilibrium drug loading of sodium salicylate The rate and release rate of hydrogel prepared with mature leaf fiber highest.