【摘要】 为探寻茶籽壳吸附剂的制备工艺,以改性产物对磷酸根的去除效果为指标,考察了物料投加量、各阶段反应温度和时间等因素对改性效果的影响,通过单因素实验与正交实验优选了最佳改性条件为:环氧氯丙烷添加量为30mL,第一阶段反应温度100℃,反应时间为2.5h,二甲胺添加量为40mL,第二阶段反应温度为65℃,反应时间为6h。随后使用傅里叶红外变换光谱(FTIR),扫描电镜(SEM)及全自动比表面积和孔隙分析仪对所得改性产物的成分、表面形态和孔隙结构进行表征。结果表明,经过改性,茶籽壳中的木质素、半纤维素和其他杂质基本被去除,但保留了纤维素的骨架,并且其表面形貌发生很大的变化,比表面积和孔隙结构十分发达。更多还原

【Abstract】 The objective of this study was to find the modification of tea seed shells.The removal of H2PO-4were used to examine the effect of material dosage,reaction temperature and time on the modification.On the basis of signal- factor and orthogonal test,the optimum modification conditions were as follows: 30 mL of the epichlorohydrin,40 mL of the dimethylamine,100℃ of the first stage reaction temperature,2.5 hours of the first stage reaction temperature,and 65℃ of the second stage reaction temperature,and 6 hours of the second stage reaction temperature.The composition,morphology and structure of the modified products were characterized by Fourier Transform Infrared( FTIR),scanning electron microscopy( SEM) and automatic specific surface area and porosity analyzer.The results showed that the morphology of tea seed shells had changed greatly,lignin and hemicellulose were removed and cellulose backbone was retained after modification.更多还原