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摘要:
这是一篇矿物加工工程领域的论文。电气石具有自发极化效应、热释电性、远红外辐射和负离子释放等效应被广泛应用。为了增加其在水性涂料中的分散稳定性，改善其在水性涂料中的使用性能，本实验采用羧基化纳米纤维素（C-CNF）对电气石进行表面接枝改性，并对实验条件进行了优化。实验结果表明，当C-CNF的添加量为2 g、反应温度为50 ℃、反应时间为2 h、固液比为1∶5时，改性电气石的性能达到较佳值，其浊度达到1361 ntu，接触角达到了53o。通过对改性电气石的结构进行表征，发现C-CNF成功接枝到了电气石表面，改性电气石在水性介质中的分散性得到较大的提升。
Abstract:This is an article in the field of mineral processing engineering. Tourmaline has been widely used for its spontaneous polarity, pyroelectric effect, far-infrared radiation and negative-ion release effect. In order to increase its stability in water-based coatings and improve its performance in water-based coatings, in this work, the surface modification of tourmaline with carboxylated nanolocellulose (C-CNF) was studied and optimized. The test results show that the performance of modified tourmaline was optimal while the addition of C-CNF was 2 g, solid-to-liquid ratio 1:5, and reacted 2h at 50 ℃, its turbidity reached 1361 ntu, contact angle to 53o. It was found that C-CNF was successfully grafted to the tourmaline surface by means of characterization of the modified tourmaline, and the dispersion of the modified tourmaline in the aqueous medium was better improved.
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