【摘要】：納米CaCO_3漿液中加入L-賴氨酸,在其表面引入羧基、氨基等活性基團(tuán)實(shí)現(xiàn)表面改性,利用FTIR、XRD、SEM和TGA等手段對(duì)改性機(jī)理進(jìn)行研究。結(jié)果表明:L-賴氨酸是以化學(xué)鍵合的形式接枝到納米CaCO_3表面,改性后的納米CaCO_3分散良好,晶面間距增大;L-賴氨酸接枝納米CaCO3最佳工藝條件為:料漿CaCO_3中質(zhì)量分?jǐn)?shù)為8%~10%,L-賴氨酸與納米CaCO_3質(zhì)量比為0.1,改性溫度70℃,時(shí)間70 min;優(yōu)化工藝條件下,改性納米CaCO_3的活化度為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，

本文編號(hào)：2471102