CN106590049A - 一种高吸附性的改性碳酸钙粉体及其制备方法 - Google Patents

一种高吸附性的改性碳酸钙粉体及其制备方法 Download PDF

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CN106590049A
CN106590049A CN201610914963.1A CN201610914963A CN106590049A CN 106590049 A CN106590049 A CN 106590049A CN 201610914963 A CN201610914963 A CN 201610914963A CN 106590049 A CN106590049 A CN 106590049A
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calcium carbonate
carbonate powder
powder
modified calcium
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陈永忠
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QINGYANG YONGCHENG CALCIUM INDUSTRY Co Ltd
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Abstract

本发明公开了一种高吸附性的改性碳酸钙粉体，该改性碳酸钙粉体在制备过程中将碳酸钙先经过钛酸酯偶联剂、硬脂酸/乙醇溶液湿法球磨预处理，改善其分散性，提高表面反应活性，随后在其表面原位交联包覆羟乙基纤维素‑聚乙烯亚胺膜，获得了具有良好分散稳定性和两亲性的改性粉体，改性后的粉体具有优良的吸附性，在污水处理、环境改善、吸附剂等材料领域具有优异的填充改性效果。

Description

一种高吸附性的改性碳酸钙粉体及其制备方法
技术领域
本发明涉及无机粉体表面改性技术领域，尤其涉及一种高吸附性的改性碳酸钙粉体及其制备方法。
背景技术
碳酸钙是一种十分常见的无机粉末填料，其价格低廉、无毒无味、白度高、硬度好等优点，在橡胶制品、造纸、油墨、塑料、涂料等等领域均有广泛的应用，然而，碳酸钙本质上一种无机矿物质，与有机物质亲和相容性较差，直接填充将会导致产品性能严重劣化，使用范围严重受限，因此，在实际应用中需要对碳酸钙粉体进行改性处理。
目前主要的改性方法有机械细化法、表面改性剂如偶联剂、脂肪酸及其盐、表面活性剂等改性两大类，两种方法各有其优势，改性后的碳酸钙性能也得到一定的改善。《硬脂酸-钛酸酯偶联剂改性重质碳酸钙粉体研究》一文以硬脂酸、钛酸酯偶联剂作为复合改性剂，无水乙醇作为分散剂，采用湿法球磨对粉体进行改性处理，取得了较为理想的改性效果，但是这种方法制备得到的产品为疏水性产品，在水性油墨、水性涂料领域应用受到限制，且附加功能不足，仅限于补强增韧用，需要做进一步的改性处理，以扩宽其使用范围。
发明内容
本发明目的就是为了弥补已有技术的缺陷，提供一种高吸附性的改性碳酸钙粉体及其制备方法。
本发明是通过以下技术方案实现的：
一种高吸附性的改性碳酸钙粉体，该改性碳酸钙粉体由以下重量份的原料制成：碳酸钙50、硬脂酸1-2、钛酸酯偶联剂2-3、无水乙醇60-80、羟乙基纤维素3-5、浓度为5%的戊二醛水溶液15-20、聚乙烯亚胺1-2、去离子水60-80。
所述的一种高吸附性的改性碳酸钙粉体的制备方法包括以下步骤：
（1）先将钛酸酯偶联剂、硬脂酸、碳酸钙一起投入无水乙醇中，球磨40-50min后热风干燥，完全除去溶剂，研磨分散后得预改性碳酸钙粉体备用；
（2）将聚乙烯亚胺、羟乙基纤维素一起投入去离子水中，搅拌至其完全溶解后投入预改性碳酸钙粉体，超声搅拌混合2-3h，随后滴加戊二醛水溶液，边滴加边搅拌，滴加完毕后继续搅拌反应4-5h，反应结束后抽滤，所得产物物水洗2-3次后在80℃烘箱内干燥处理，干燥后的产物经研磨分散即得所述的改性碳酸钙粉体。
本发明的优点是：本发明将碳酸钙先经过钛酸酯偶联剂、硬脂酸/乙醇溶液湿法球磨预处理，改善其分散性，提高表面反应活性，随后在其表面原位交联包覆羟乙基纤维素-聚乙烯亚胺膜，获得了具有良好分散稳定性和两亲性的改性粉体，改性后的粉体具有优良的吸附性，在污水处理、环境改善、吸附剂等材料领域具有优异的的填充改性效果。
具体实施方式
一种高吸附性的改性碳酸钙粉体，该改性碳酸钙粉体由以下重量份的原料制成：碳酸钙50、硬脂酸1、钛酸酯偶联剂2、无水乙醇60、羟乙基纤维素3、浓度为5%的戊二醛水溶液15、聚乙烯亚胺1、去离子水60。
该实施例粉体的制备方法包括以下步骤：
（1）先将钛酸酯偶联剂、硬脂酸、碳酸钙一起投入无水乙醇中，球磨40min后热风干燥，完全除去溶剂，研磨分散后得预改性碳酸钙粉体备用；
（2）将聚乙烯亚胺、羟乙基纤维素一起投入去离子水中，搅拌至其完全溶解后投入预改性碳酸钙粉体，超声搅拌混合2h，随后滴加戊二醛水溶液，边滴加边搅拌，滴加完毕后继续搅拌反应4h，反应结束后抽滤，所得产物物水洗2次后在80℃烘箱内干燥处理，干燥后的产物经研磨分散即得所述的改性碳酸钙粉体。
制得的碳酸钙粉体性能测试结果为：
粒度D50：0.85μm；粘度：42.5mPa.s活化度：96.5%；吸油值：0.28ml/g；沉降体积：1.14ml/g。

Claims (2)

1.一种高吸附性的改性碳酸钙粉体，其特征在于，该改性碳酸钙粉体由以下重量份的原料制成：碳酸钙50、硬脂酸1-2、钛酸酯偶联剂2-3、无水乙醇60-80、羟乙基纤维素3-5、浓度为5%的戊二醛水溶液15-20、聚乙烯亚胺1-2、去离子水60-80。
2.如权利要求1所述的一种高吸附性的改性碳酸钙粉体的制备方法，其特征在于，其制备方法包括以下步骤：
（1）先将钛酸酯偶联剂、硬脂酸、碳酸钙一起投入无水乙醇中，球磨40-50min后热风干燥，完全除去溶剂，研磨分散后得预改性碳酸钙粉体备用；
（2）将聚乙烯亚胺、羟乙基纤维素一起投入去离子水中，搅拌至其完全溶解后投入预改性碳酸钙粉体，超声搅拌混合2-3h，随后滴加戊二醛水溶液，边滴加边搅拌，滴加完毕后继续搅拌反应4-5h，反应结束后抽滤，所得产物物水洗2-3次后在80℃烘箱内干燥处理，干燥后的产物经研磨分散即得所述的改性碳酸钙粉体。
CN201610914963.1A 2016-10-20 2016-10-20 一种高吸附性的改性碳酸钙粉体及其制备方法 Pending CN106590049A (zh)

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