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利用支化型交替聚(苯乙烯-alt-马来酸酐)(BPSMA)在选择溶剂DMF-H2O中自组装制备球形胶束,以之作为新型颗粒乳化剂稳定白油-水体系,探讨胶束浓度和pH对BPSMA胶束乳化性能的影响。用紫外分光光度计(UV-Vis)追踪了聚合物溶液自组装过程,粒径及Zeta电位分析仪和透射电子显微镜(TEM)表征了BPSMA胶束的基本性质;利用光学显微镜分析了乳液性质;扫描电子显微镜(SEM)观察了胶束在固化后的油水界面的形貌。结果表明:BPSMA胶束具有优异的乳化效率,在极低的胶束质量浓度下(0.25~1.00mg/mL)亦可长期稳定白油-水乳液;BPSMA胶束所稳定的乳液具有明显的pH响应性,当pH≤6时,胶束呈球形颗粒状吸附并稳定于油水界面,当pH>6时,胶束从油水界面脱离,乳液破乳;此外,BPSMA胶束作为颗粒乳化剂还具备良好的普适性,可以长效稳定碳酸二辛脂、辛酸丙基庚酯、硅油、棕榈酸异辛酯和润肤油脂等。
Spherical micelles were prepared by the self-assembly of branched-type alternating poly (styrene-alt-maleic anhydride) (BPSMA) in DMF-H2O as the new type of emulsifier to stabilize the white oil- Effect of concentration and pH on the emulsification of BPSMA micelles. The self-assembly process of polymer solution was followed by UV-Vis. The particle size, Zeta potential analyzer and transmission electron microscope (TEM) were used to characterize the properties of BPSMA micelles. The emulsion properties were analyzed by light microscopy. Scanning electron microscopy (SEM) observed micelles in the cured oil-water interface morphology. The results show that BPSMA micelles have excellent emulsifying efficiency, and white oil-water emulsion can also be stabilized for a long time under very low micelle concentration (0.25-1.00 mg / mL). The emulsions stabilized by BPSMA micelles have obvious pH Responsiveness, when pH≤6, the micelles were spherical particles adsorbed and stabilized at the oil-water interface. When pH> 6, the micelles detached from the oil-water interface and the emulsion was demulsified. In addition, the BPSMA micelles also served as a particle emulsifier Good universal, long-term stability of two capryl carbonate, octyl caprylate, silicone oil, isooctyl palmitate and emollient fat.