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›› 2006, Vol. 6 ›› Issue (5): 742-747.

• 过程与工艺 • 上一篇    下一篇

羟基磷酸钙的制备及其对甲基丙烯酸甲酯悬浮聚合的影响

黄维,章于川,夏茹   

  1. 安徽大学化学化工学院
  • 出版日期:2006-10-20 发布日期:2006-10-20

Synthesis of Hydroxyapatite and Its Effect on Suspension Polymerization of Methylmethacrylate

HUANG Wei,ZHANG Yu-chuan,XIA Ru   

  1. School of Chemistry and Chemical Engineering, Anhui University
  • Online:2006-10-20 Published:2006-10-20

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摘要： 利用Ca(OH)2和H3PO4中和反应制备悬浮聚合分散剂超细羟基磷酸钙(HAP). 通过正交实验法，研究了反应温度、Ca(OH)2浓度、H3PO4滴加速度、表面活性剂十二烷基苯磺酸钠(SDBS)的加入量等各因素对反应产物羟基磷酸钙结晶形态与尺寸的影响. 分别将不同条件下制备的HAP与聚乙烯醇(PVA)组成复合分散体系，通过甲基丙烯酸甲酯(MMA)的悬浮聚合反应，比较了各组的聚合效果. 应用红外光谱及透射电镜对HAP进行了表征，分析了HAP的结晶形态及尺寸对聚甲基丙烯酸甲酯(PMMA)的粒径及其分布的影响. 结果表明，本实验制备的长′宽为140 nm×35 nm的针状结晶HAP与PVA的复合分散体系对MMA悬浮聚合效果最好，可制备出综合性能较好、粒径d32达1.41 mm的PMMA光学小球.

关键词: 正交实验, 羟基磷酸钙, 中和, 甲基丙烯酸甲酯

Abstract: A method of hydroxyapatite (HAP) microcrystal synthesis with neutralization reaction of Ca(OH)2 suspension and H3PO4 solution was studied. With designed orthogonal tests, the effects of temperature, concentration of Ca(OH)2, feeding rate of H3PO4 and amount of sodium dodecylbenzene sulfonate (SDBS) on the morphology and properties of HAP were investigated. Several groups of compound dispersant agents of HAP, polyvinyl alcohol (PVA) and SDBS were prepared, and the effect of each group on the suspension polymerization of methylmethacrylate (MMA) was assessed and compared with each other. The HAP was characterized by FT-IR and TEM. The influences of morphology and size of HAP crystal grains on diameter and size distribution of PMMA were analysed. The results showed that HAP/PVA/SDBS had good effects on suspension polymerization of MMA. It was found that the system of diameter of PMMA increased with increasing acicular degree of HAP, and the diameter of PMMA first increased and then decreased with increasing size of HAP and when the size of HAP was 140 nm×35 nm, the diameter of PMMA reached peak value at 1.41 mm.

Key words: orthogonal test, hydroxyapatite, neutralization, methylmethacrylate