| 超支化双亲水性嵌段共聚物对CaCO3结晶影响的研究 |
| Influence of Hyperbranched DHBC with Carboxyl Terminal Groups on the Crystallization of CaCO3 |
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| 摘要: 采用合成的聚乙二醇-超支化聚酯(PEG-hb-DMPA)的线性-超支化杂化二嵌段共聚物, 探讨了羧端基树状功能化的杂化嵌段共聚物对CaCO3结晶的影响，并用FTIR、XRD、SEM等对产物进行了表征。结果表明，羧端基的双亲水性嵌段共聚物对CaCO3结晶形貌乃至晶型均具有显著调控作用，比较高的浓度(1.67 g·L-1, >10 min)或较低浓度作用较长时间(0.33 g·L-1, 24 h)均得到了呈较均匀球粒形态的球霰石CaCO3结晶。 |
| 关键词: CaCO3 超支化高分子 双亲水性嵌段共聚物 结晶调节剂 |
| 基金项目: |
| Abstract: A novel hybrid double hydrophilic block copolymer (DHBC) of poly(ethylene glycol)(PEG) and hyperbranched polyester from dimethylolpropionic acid (DMPA) with carboxyl terminal groups was synthesized and investigated as a modifying additive for CaCO3 crystallization. Primary investigations indicated that these hybrid DHBCs possessed strong modifying ability for both polymorphism and morphologies of inorganic crystals. In the presence of the fourth generation of hyperbranched hybrid DHBC with carboxyl terminal groups, in higher concentration (1.67 g·L-1, >10 min) or low concentration for long incubation time (0.33 g·L-1, 24 h), almost pure spherical vaterite was obtained, while with hydroxyl terminal groups only rhombohedral calcite resembling the control sample was harvested. The crystal phases were fully characterized with FTIR, XRD and also investigated by SEM. |
| Keywords: CaCO3 hyperbranched polymer DHBC crystallization modifier |
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| 摘要点击次数: 1220 |
| 全文下载次数: 1870 |
| 孟庆伟,王希,谌东中,余学海.超支化双亲水性嵌段共聚物对CaCO3结晶影响的研究[J].无机化学学报,2006,22(3):447-450. |
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