L-赖氨酸接枝纳米碳酸钙的合成
发布时间：2019-05-07 13:00
【摘要】：纳米CaCO_3浆液中加入L-赖氨酸,在其表面引入羧基、氨基等活性基团实现表面改性,利用FTIR、XRD、SEM和TGA等手段对改性机理进行研究。结果表明:L-赖氨酸是以化学键合的形式接枝到纳米CaCO_3表面,改性后的纳米CaCO_3分散良好,晶面间距增大;L-赖氨酸接枝纳米CaCO3最佳工艺条件为:料浆CaCO_3中质量分数为8%~10%,L-赖氨酸与纳米CaCO_3质量比为0.1,改性温度70℃,时间70 min;优化工艺条件下,改性纳米CaCO_3的活化度为46.3%。
[Abstract]:When L-lysine was added to the nano-CaCO_3 slurry, carboxyl and amino groups were added to the surface to modify the surface. The modification mechanism was studied by means of FTIR,XRD,SEM and TGA. The results showed that L-lysine was grafted onto the surface of nano-CaCO_3 in the form of chemical bonding. The modified nano-CaCO_3 dispersed well and the spacing of crystal planes increased. The optimum technological conditions for grafting L-lysine onto nano-CaCO3 were as follows: the mass fraction of CaCO_3 in slurry was 8% and 10%, the mass ratio of L-lysine to nano-CaCO_3 was 0.1, the modification temperature was 70 鈩，
本文编号：2471102
[Abstract]:When L-lysine was added to the nano-CaCO_3 slurry, carboxyl and amino groups were added to the surface to modify the surface. The modification mechanism was studied by means of FTIR,XRD,SEM and TGA. The results showed that L-lysine was grafted onto the surface of nano-CaCO_3 in the form of chemical bonding. The modified nano-CaCO_3 dispersed well and the spacing of crystal planes increased. The optimum technological conditions for grafting L-lysine onto nano-CaCO3 were as follows: the mass fraction of CaCO_3 in slurry was 8% and 10%, the mass ratio of L-lysine to nano-CaCO_3 was 0.1, the modification temperature was 70 鈩，
本文编号：2471102
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