物理化学学报 >> 2009, Vol. 25 >> Issue (11): 2225-2231.doi: 10.3866/PKU.WHXB20091011

研究论文 上一篇    下一篇

交替共聚物P(St-alt-Ma-Dopa)的自组装及乳化性能

杨逸群, 易成林, 王益华, 江金强, 刘晓亚   

  1. 江南大学化学与材料工程学院, 江苏 无锡 214122
  • 收稿日期:2009-03-29 修回日期:2009-06-22 发布日期:2009-10-28
  • 通讯作者: 刘晓亚 E-mail:lxy@jiangnan.edu.cn

Self-Assembly and Emulsification of the Alternating Copolymer P(St-alt-Ma-Dopa)

YANG Yi-Qun, YI Cheng-Lin, WANG Yi-Hua, JIANG Jin-Qiang, LIU Xiao-Ya   

  1. School of Chemical and Material Engineering, Jiangnan University, Wuxi 214122, Jiangsu Province, P. R. China
  • Received:2009-03-29 Revised:2009-06-22 Published:2009-10-28
  • Contact: LIU Xiao-Ya E-mail:lxy@jiangnan.edu.cn

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摘要：

以二甲亚砜(DMSO)为溶剂, 用多巴胺(Dopamine)胺解聚(苯乙烯-alt-马来酸酐)(P(St-alt-Man))制备双亲交替共聚物P(St-alt-Ma-Dopa). 在选择性溶剂(N,N-二甲基甲酰胺(DMF)/水)中对P(St-alt-Ma-Dopa)进行溶液自组装, 用紫外分光光度计(UV)、透射电镜(TEM)、荧光探针技术、zeta电位仪等技术研究了添加剂(HCl, NaOH或NaCl)对P(St-alt-Ma-Dopa)自组装行为的影响及其胶体粒子的乳化性能. 结果表明, P(St-alt-Ma-Dopa)链在选择性溶剂(DMF/水)中可自组装形成球状胶体颗粒, 其临界聚集水含量(CWC)明显大于P(St-alt-Man). 体系的pH值、盐浓度等对P(St-alt-Ma-Dopa)胶体粒子的性质(粒子大小、zeta电位、亲疏水性等)有较大的影响, 引入多巴胺结构使交替共聚物胶体粒子的乳化性能有所提高.

关键词: 自组装, 交替共聚物, 胶体粒子, 乳化, 多巴胺

Abstract:

Using dimethylsulfoxide (DMSO) as solvent, an amphiphilic alternating copolymer P(St-alt-Ma-Dopa) was prepared by the ammonolysis of P(St-alt-Man) with dopamine. The influences of additives (HCl, NaOH, or NaCl) on the characteristics of P(St-alt-Ma-Dopa) colloidparticles after the self-assemblyof the copolymer in the selective solvent N,N-dimethylformamide (DMF)/H2O were studied by UV spectrophotometer, transmission electron microscopy (TEM), zeta potential measurements, and fluorescence probe. Results show that P(St-alt-Ma-Dopa) can self-assemble into spherical particles and its critical water content (CWC) is larger than that of P(St-alt-Man). The size, zeta potential, and hydrophilic-hydrophobic property of these colloid particles showed a series of regular changes after the addition of HCl, NaOH, or NaCl. The emulsification of P(St-alt-Ma-Dopa) colloid particles was improved because of the presence of dopamine.

Key words: Self-assembly, Alternating copolymer, Colloid particle, Emulsification, Dopamine