| A SURFACTANT-ASSISTED APPROACH FOR PREPARING COLLOIDAL AZO POLYMER SPHERES WITH NARROW SIZE DISTRIBUTION |
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| 作者姓名： | Xiao-lan Tong Yao-bang Li Ya-ning He Xiao-gong Wang |
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| 作者单位： | Department of Chemical Engineering and Laboratory for Advanced Materials, Tsinghua University, Beijing, 100084, China |
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| 摘 要： | A surfactant-assisted method for preparing colloidal spheres with narrow size distribution from a polydispersed azo polymer has been developed in this work. The colloidal spheres were formed through gradual hydrophobic aggregation of the polymeric chains in THF-H2O dispersion media, which was induced by a steady increase in the water content. Results showed that the addition of a small amount of surfactant （SDBS） could significantly narrow the size distribution of the colloidal spheres. The size distribution of the colloidal spheres was determined by the concentrations of azo polymer and the amount of surfactant in the systems. When the concentrations of polymer and surfactant amount were in a proper range, colloidal spheres with narrow size distribution could be obtained. The colloidal spheres formed by this method could be elongated along the polarization direction of the laser beams to be a new type of the colloid-based functional materials. upon Ar^＋ laser irradiation. The colloidal spheres are considered
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| 关 键 词： | 表面活性剂 粒度分配 胶质球 偶氮类聚合物 |
| 收稿时间： | 2005-09-27 |
| 修稿时间： | 2005-11-09 |
A SURFACTANT-ASSISTED APPROACH FOR PREPARING COLLOIDAL AZO POLYMER SPHERES WITH NARROW SIZE DISTRIBUTION |
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| Xiao-lan Tong Yao-bang Li Ya-ning He Xiao-gong Wang.A SURFACTANT-ASSISTED APPROACH FOR PREPARING COLLOIDAL AZO POLYMER SPHERES WITH NARROW SIZE DISTRIBUTION[J].Chinese Journal of Polymer Science,2006,0(4):431-436. |
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| Authors: | Xiao-lan Tong Yao-bang Li Ya-ning He Xiao-gong Wang |
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| Institution: | Department of Chemical Engineering and Laboratory for Advanced Materials, Tsinghua University, Beijing, 100084, China |
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| Abstract: | A surfactant-assisted method for preparing colloidal spheres with narrow size distribution from a polydispersed azo polymer has been developed in this work. The colloidal spheres were formed through gradual hydrophobic aggregation of the polymeric chains in THF-H2O dispersion media, which was induced by a steady increase in the water content. Results showed that the addition of a small amount of surfactant (SDBS) could significantly narrow the size distribution of the colloidal spheres. The size distribution of the colloidal spheres was determined by the concentrations of azo polymer and the amount of surfactant in the systems. When the concentrations of polymer and surfactant amount were in a proper range,colloidal spheres with narrow size distribution could be obtained. The colloidal spheres formed by this method could be elongated along the polarization direction of the laser beams upon Ar laser irradiation. The colloidal spheres are considered to be a new type of the colloid-based functional materials. |
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| Keywords: | Surfactant-assisted Narrow size distribution Colloidal sphere Azo polymer SIZE DISTRIBUTION NARROW POLYMER new type functional materials irradiation polarization direction laser range concentrations systems SDBS Results addition small surfactant induced steady increase |
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