pH-Responsive Schizophrenic Diblock Copolymers Prepared by Polymerization-Induced Self-Assembly.

pH-Responsive Schizophrenic Diblock Copolymers Prepared by Polymerization-Induced Self-Assembly.
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通过聚合诱导的自组装制备的pH响应性精神分裂症二嵌段共聚物。

DOI:
10.1021/acs.macromol.7b01005
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发表时间:
2017-08-22
期刊:
影响因子:
5.5
通讯作者:
Armes SP
Armes SP
中科院分区:
化学1区
文献类型:
--
作者:
Canning SL;Neal TJ;Armes SP

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聚合诱导自组装(比萨)用于直接在酸性水溶液中非常方便、高效地制备两性两嵌段共聚物纳米颗粒。在pH 2下形成包含质子化多胺稳定剂嵌段和疏水性多酸核形成嵌段的阳离子纳米颗粒。在pH 10下发生胶束反转以产生具有离子化的多酸稳定剂嵌段和疏水性多胺核形成嵌段的阴离子纳米颗粒。宏观沉淀发生在pH 6-7左右,其接近该两性二嵌段共聚物的等电点。将荧光素和罗丹明染料标记分别掺入酸和胺嵌段中,导致双色双荧光自报告pH响应性纳米颗粒。
Polymerization-induced self-assembly (PISA) is used for the highly convenient and efficient preparation of ampholytic diblock copolymer nanoparticles directly in acidic aqueous solution. Cationic nanoparticles comprising a protonated polyamine stabilizer block and a hydrophobic polyacid core-forming block are formed at pH 2. Micelle inversion occurs at pH 10 to produce anionic nanoparticles with an ionized polyacid stabilizer block and a hydrophobic polyamine core-forming block. Macroscopic precipitation occurs at around pH 6–7, which lies close to the isoelectric point of this ampholytic diblock copolymer. Incorporation of fluorescein and rhodamine dye labels into the acid and amine blocks, respectively, leads to dual-color bifluorescent self-reporting pH-responsive nanoparticles.
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发表时间: 2005-06-22
影响因子: 15
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