Inorganic Chemicals Industry >
Surface modification effect and mechanism of new organic modifiers on ground calcium carbonate
Received date: 2021-08-27
Online published: 2022-07-14
New modifiers and traditional modifiers were used to perform dry surface organic modification on two ground calcium carbonates,and the effect of modifier types and modifier dosages on the oil absorption,activation index,oil phase dispersion stability and water contact angle was explored.Then the optimized dosage of modification was determined,and the modification mechanism of ground calcium carbonate was explored by fourier transform infrared spectrometer(FT-IR) and thermogravimetric analysis(TG) characterization.The results showed that JST-9001(polyoxyethylene ether type composite modifier),JST-9003(polyoxyethylene ether type composite modifier),stearic acid and aluminate F-2 had better modification effects,especially the two new modifiers JST-9001 and JST-9003 could obtain more excellent effects of surface modification at low modifier dosage(0.5%).And under the optimized dosage,the hydrophilic groups in the molecules of JST-9001 and JST-9003 modifiers were bonded with the —OH on the surface of ground calcium carbonate,coating the surface of ground calcium carbonate particles with modifiers molecular layer.
Chao LIANG , Chunquan LI , Zhiming SUN , Shuilin ZHENG . Surface modification effect and mechanism of new organic modifiers on ground calcium carbonate[J]. Inorganic Chemicals Industry, 2022 , 54(7) : 70 -77 . DOI: 10.19964/j.issn.1006-4990.2021-0517
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