当前位置:首页 > 环氧基硅油改性壳聚糖的制备研究(开题报告)
料通过壳聚糖与TMOS制得,并将葡萄糖氧化酶包埋在复合材料内。所得酶电极的稳定性超过60天。这种生物传感器可以用于人血样中葡萄糖浓度的检测。
壳聚糖硅基复合材料用于共沸物的预蒸发
将CS与GPTMS共混所得壳聚糖硅基复合材料,用于异丙醇-水的预蒸发脱水。发现硅氧烷的引入并没有显著降低其亲水性。此外,复合材料具有良好的选择渗透性及高的渗透通量。同时,交联反应和有机-无机复合结构使复合材料在140天长期使用下仍能保持良好的稳定性。
为改善季胺化壳聚糖的溶涨性,将季胺化壳聚糖与TEOS复合制备壳聚糖硅基复合材料,用于分离醇水共沸混合物。他们考察了TEOS含量对复合材料分离选择性的影响。发现复合材料比纯季胺化壳聚糖有更高的纯水选择性,这主要归因于壳聚糖硅基复合结构的形成对其溶涨的抑制。
将磺酸化纳米硅胶离子交联的壳聚糖硅胶复合膜,用于乙醇-水共沸物的预蒸发分离。复合材料中的硅胶颗粒可作为间隔臂连接不同的壳聚糖链,并为水的渗透提供外部空间,从而使复合壳聚糖具有高的透过率。
三、研究内容及实验方案:
(一)研究内容
制备可溶性壳聚糖;
制备壳聚糖有机硅表面活性剂;
对壳聚糖有机硅表面活性剂的性能进行测量,表征;
(二)实验方案
实验用品:壳聚糖(食品级,浙江奥兴甲壳素有限公司);KH560 (γ2缩水甘油醚基丙基三甲氧基硅烷),分析纯,江西星火化工厂;双氧水(30%),分析纯,上海试剂二厂;丙酮,分析纯,北京化学试剂研究所;异丙醇,分析纯,上海化学研究所;浓盐酸(36%),化学纯,上海试剂一厂;增力电动搅拌机,JB50-D,上海标本模型厂制造;数显恒温水浴锅,HH-4,国华电器有限公司;微波炉,NJL07-1,广东美的微波炉制造有限公司; 实验方法:
可溶性壳聚糖的制备
准确称取2g壳聚糖于一小烧杯中,向小烧杯中加入配制好的40mL 4 %的盐酸溶液,
搅拌,加入2mL的双氧水,继续搅拌片刻放入微波炉中加热12min后取出烧杯,搅拌。反应完成后,静置,冷却,用无水乙醇沉淀。溶液中出现白色胶状固体。将溶液抽滤,洗涤后收集白色滤饼。放置烘箱中烘干,得到淡黄色可溶于水的固体即为可溶性壳聚糖,重复几次以制备更多的可溶性壳聚糖。 壳聚糖有机硅表面活性剂的制备
向三颈烧瓶中加入2g可溶性壳聚糖和25mL异丙醇,搅拌回流;水浴升温至50 ℃,将3mL KH560溶液溶解在25mL丙酮中,缓慢加入至三颈烧瓶中,反应6h。冷却、抽滤,滤液在50 ℃水浴中用旋转蒸发仪浓缩至30mL左右;室温下放置4-5天,析出的淡黄色晶体,即为壳聚糖有机硅表面活性剂。
四、目标、主要特色及工作进度
目标:制备出壳聚糖有机硅表面活性剂 主要特色:有环氧基硅油改性壳聚糖 工作进度:
1.查找相关的外文资料并选择翻译 2.查阅资料并撰写开题报告 3.调查、研究、实验或撰写论文(设计) 4.论文(设计)定稿 5.主审教师评定论文(设计) 6.学生论文(设计)答辩
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