CN101376721B - 一种针状硅灰石粉的活化处理方法 - Google Patents
一种针状硅灰石粉的活化处理方法 Download PDFInfo
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- CN101376721B CN101376721B CN2008100134941A CN200810013494A CN101376721B CN 101376721 B CN101376721 B CN 101376721B CN 2008100134941 A CN2008100134941 A CN 2008100134941A CN 200810013494 A CN200810013494 A CN 200810013494A CN 101376721 B CN101376721 B CN 101376721B
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Abstract
本发明涉及一种针状硅灰石粉的强界面活化处理方法，其通过酸化处理硅灰石，使其活化，填充活化后的硅灰石增强和树脂的相容性，改善塑料制品的力学性能和耐热性，改善塑料制品的功能强度，起补强、增强作用，调整塑料的流变性能；提高制品的尺寸稳定性；替代价格较贵的玻璃纤维作填料，可部分替代价格高的塑料用量，从而降低制品成本。
Description
技术领域
本发明涉及化工领域，具体的说是硅灰石的活化处理方法。
技术背景
硅灰石具有细晶状、纤维状、磷片状等晶体形态，由于其无毒，并具有很高的白度、良好的介电性能和较高的耐热性能，热膨胀系数为6.15×10℃，低吸油性、低吸水性、热稳定性、化学稳定性等物化性质，因而被广泛应用在建筑陶瓷、涂料、塑料、橡胶、冶金和耐火材料等工业部门。
然而硅灰石表面具有亲水性，并呈极性，容易吸附水分，而聚合物则又憎水性，故两者之间的相容性很差，在界面难以形成良好的粘结，因此对于其表面改性显得尤为重要。
发明内容
本发明的目的是通过填充活化后的硅灰石增强和树脂的相容性，改善塑料制品的力学性能和耐热性；改善塑料制品的功能性，起补强、增强作用；调整塑料的流变性能；提高制品的尺寸稳定性；替代价格较贵的玻璃纤维作填料，可部分替代价格高的塑料用量，从而降低制品成本。
本发明的特殊处理工艺，其特征在于包括以下工艺步骤：
第一步、在室温下，用浓度为1％盐酸处理针状硅灰石，反应30min，使其发生一定程度的表面刻蚀；
第二步、在80～90℃下，烘干硅灰石粉体；
第三步、利用干法处理，用偶联剂对酸化硅灰石进行改性处理。
硅灰石酸化处理工艺流程见附图1。
在显微镜下对未处理和酸化处理后的硅灰石进行比较，发现在酸化处理后硅灰石在保持其针状特殊结构的情况下发生表面刻蚀，产生了物理化学变化，增强了和表面改性剂之间的作用，使其与树脂的相容性大大增加。
本发明跟现有技术比，硅灰石活化程度高，成本低，增强效果好，生产和使用都很方便。
附图说明
图1、硅灰石酸化处理工艺流程图；
图2、PA6/硅灰石复合材料的制备及性能测试工艺流程图；
图3、未处理硅灰石显微镜下观察图；
图4、酸化处理后硅灰石显微镜下观察图。
具体实施方式
硅灰石在填充尼龙-6上的应用。
第一步、在室温下，用1％盐酸处理针状硅灰石，反应30min，使其发生一定程度的表面刻蚀；
第二步、在90℃下，烘干硅灰石粉体；
第三步、利用干法处理，用偶联剂对其进行改性处理，得到酸化后硅灰石。
取140份尼龙-6，酸化后硅灰石60份，偶联剂1.2份，进行挤出注塑，材料的拉伸性能和冲击性能要比单纯用偶联剂处理的提高10％以上。尼龙-6(PA6)/硅灰石复合材料的制备及性能测试见附图2。
Claims (1)
1.一种针状硅灰石粉的强界面活化处理方法，其特征在于以下制备过程：
第一步、在室温下，用浓度为1％盐酸浸泡处理针状硅灰石，反应30min，使其发生一定程度的表面刻蚀；
第二步、在88～92℃下，烘干硅灰石粉体；
第三步、利用干法处理，用偶联剂对其进行改性处理。
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| CN101935473B (zh) * | 2010-09-01 | 2013-04-17 | 福建省二轻工业研究所 | 高活性硅灰石粉体制备方法及其在运动鞋底材料中的应用 |
| CN112441592A (zh) * | 2019-08-28 | 2021-03-05 | 西南科技大学 | 一种高纯硅灰石纤维的可控制备方法 |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1043150A (zh) * | 1988-12-06 | 1990-06-20 | 张春芳 | 硅灰石填料的制备方法 |
| US5116886A (en) * | 1990-02-16 | 1992-05-26 | Degussa Aktiengesellschaft | Method for the production of fillers modified with organosilicon compounds, the fillers produced in this manner and their use |
| US5908660A (en) * | 1997-09-03 | 1999-06-01 | Dow Corning Corporation | Method of preparing hydrophobic precipitated silica |
| US6051672A (en) * | 1998-08-24 | 2000-04-18 | Dow Corning Corporation | Method for making hydrophobic non-aggregated colloidal silica |
| CN1374352A (zh) * | 2001-03-14 | 2002-10-16 | 张梦显 | 水镁石粉、硅灰石粉的表面改性及方法 |
-
2008
- 2008-09-28 CN CN2008100134941A patent/CN101376721B/zh not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1043150A (zh) * | 1988-12-06 | 1990-06-20 | 张春芳 | 硅灰石填料的制备方法 |
| US5116886A (en) * | 1990-02-16 | 1992-05-26 | Degussa Aktiengesellschaft | Method for the production of fillers modified with organosilicon compounds, the fillers produced in this manner and their use |
| US5908660A (en) * | 1997-09-03 | 1999-06-01 | Dow Corning Corporation | Method of preparing hydrophobic precipitated silica |
| US6051672A (en) * | 1998-08-24 | 2000-04-18 | Dow Corning Corporation | Method for making hydrophobic non-aggregated colloidal silica |
| CN1374352A (zh) * | 2001-03-14 | 2002-10-16 | 张梦显 | 水镁石粉、硅灰石粉的表面改性及方法 |
Non-Patent Citations (2)
| Title |
|---|
| 刘新海等.表面改性硅灰石性能研究.《中国非金属矿工业导刊》.2003,(第4期),53-54,57. * |
| 赵宇龙等.我国硅灰石产业现状及其表面改性与表征.《化工矿物与加工》.2003,(第5期),1-4. * |
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