利用电石渣制备纳米碳酸钙的研究.docx
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利用电石渣制备纳米碳酸钙的研究.docx
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利用电石渣制备纳米碳酸钙的研究
利用电石渣制备纳米碳酸钙的研究
学科专业:
研究方向:
导师:
研究生:
化学工艺
超细颗粒流态化、改性与制
王晓芳
中国·贵州·贵阳
2006年6月
摘要...................................................................................……。
..............................................……!
第一章绪论............................................................................................................................3
1.1电石渣概述......……,..................................................................……,...·························……3
1.1.1电石渣的基本性质.........................……,......……,...........··.·.······························……3
1.1.2目前电石渣的一般应用.........................................................................................3
1.1.3利用电石渣制备纳米碳酸钙.................................................................................4
1.2纳米碳酸钙的概况..............................................……,................·······························一5
1.3纳米碳酸钙的特点.............……。
............……,..…,................···.....································一5
1.4纳米的生产方法................................................................................................................6
1.4.1苏尔维法..............……。
.................................……。
..........................................····……6
1.4.2纯碱一氛化钙法................................................................··································……6
1.4.3苛化法................……,.................……,...............................................................……6
1.4.4联钙法...............................................................................................................……7
1.4.5碳化法...............................................................................................................……7
1.5目前工业上生产纳米碳酸钙的方法................................................................................7
1.5.1间歇鼓泡碳化法.........................................................……,...·..·························……8
1.5.2喷雾碳化法........................................................……,............····..·..···················……8
1.5.3喷射吸收法.........................……,........................……,...............···.·......·············一9
1.5.4超声空化法...............……,.......................................................................···.......……9
1.5.5超重力反应结晶法........................................................·......··························……10
1.6纳米碳酸钙的应用......................................................................·····························……10
1.6.1橡胶行业.........................................................................................................……10
1.6.2塑料行业......................................................................……。
............................……I1
1.6.3涂料行业.................……,.................................................................................……11
1.6.4造纸行业.........................................................................................................……1l
1.6.5制药行业.........................................................................................................……11
1.7研究的主要内容...................................................................··......·····························……12
1.7.1电石渣制备纳米碳酸钙.................................................................................……12
1.7.2纳米碳酸钙的表面改性............................·........············································……12
1.8纳米碳酸钙的表征.........................................................................·……。
···················……12
1.9电石渣制备纳米碳酸钙的现状及发展前景...........................................................……13
1.9.1电石渣制备纳米碳酸钙的研究现状..........……,............................................……13
1.9.2电石渣制备纳米碳酸钙的发展前景.............................................................……13
第二章碳酸钙的生成过程..........................................................................................................15
2.1碳化反应过程..……。
.....................................……,.......................·.··........····················……15
2.1.1碳化反应.........................................................................................................……15
2.1.2碳化反应中的结晶过程.......................................................................................16
2.3.1晶核的形成.....................................................................................................……18
2.2碳化反应过程中pH值和电导率的变化........................................................................24
2.2.2实验试剂及仪器.........................……,.................·....······.···,····························……24
2.2.3实验方法..................................................……,.............................······..···.·······……25
2.2.4实验结果与分析...................................................................................................25
毛
2.3小结............……,.........................................................................................................……28
第三章纳米碳酸钙的制备..........................................................................................................30
3.1电石渣的成分分析................................……,.............................................................……30
3.2实验方法.....................................................................……,........................................……30
3.2.1电石渣的水洗及过筛............................................................................……。
..……30
3.2.2电石渣的缎烧及消化.....................................................................................……30
3.2.3纳米碳酸钙的制备...............................................................................................31
3.2.4DTA/TG分析............................……,...............................................................……33
3.2.5XRD分析.,..................................……,.............................................................……33
3.2.6SEM分析...........................................................................……,......................……33
3.2.7粒度分析..........……,........................................................................................……33
3.2.8白度检测...............................................................................................................34
3.3实验结果与分析........................................................................................................……35
3.3.1电石渣的消化特性...............................................................................................35
3.3.2电石渣的DTA/TG分析结果...............................................................................36
3.3.3电石渣及制得样品的XRD分析结果.................................................................36
3.3.4电石渣的SEM分析结果...............................................................................……40
3.3.5电石渣及纳米碳酸钙的EDS分析结果..............................................................40
3.3.6粒度分析.…,...................................................................................................……43
3.4碳化反应条件对碳酸钙粒度的影响..............................................................................45
3.4.1锻烧温度对粒度的影响.......................................................................................45
3.4.2反应温度对粒度的影响.......................................................................................46
3.4.3氢氧化钙浓度对粒度的影响...............................................……。
..................……48
3.4斗外加剂的种类及加量对粒度的影响...................................................................49
3.5杂质对产品粒径和晶状的影响......................................................................................51
3.5.1电石渣直接碳化...................................……,...................................................……51
3.5.2外掺其它他组分时的碳化反应结果...................................................................52
3.6碳化反应工艺条件选择............................................................................................……54
3.6.1.正交实验设计.................................................................................................……54
3.6.2正交实验结果分析.....……。
.…,...................................……。
..............................……55
3.7小结............................................................................................................................……56
第四章纳米碳酸钙的活化..........................................................................................................58
4.1碳酸钙活化的目的和意义..............................................................................................58
4.1.1纳米粒子的特性...................................................................................................58
4.1.2碳酸钙活化.....................................................................................................……58
4.2纳米粒子团聚动力学......................................................................................................59
4.3活化机理............................................……,.,.....................................................……,...……60
4.4活化方法.......……,.......................................................................................……,........……60
4.4.1干法活化................……。
……。
..........................……,..........................................……60
4.4.2湿法活化....................................................……,.............................................……61
4.5活性剂........................................................................................................................……61
4.5.1偶联剂.........……,,.……,....................................................................................……61
4.5.2有机酸类.........................................................................................................……62
4.5.3.无机类............................................................................................................……63
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4.6活化实验............................……,..............................................................
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