Acta Phys. -Chim. Sin. ›› 2009, Vol. 25 ›› Issue (11): 2225-2231.doi: 10.3866/PKU.WHXB20091011

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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


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


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