Well-defined multi-stimuli responsive fluorinated graft poly(ether amine)s (fgPEAs)

Well-defined multi-stimuli responsive fluorinated graft poly(ether amine)s (fgPEAs)
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明确的多刺激响应氟化接枝聚(醚胺)(fgPEA)

DOI:
10.1016/j.polymer.2010.11.051
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发表时间:
2011-01
期刊:
影响因子:
4.6
通讯作者:
姜学松
姜学松
中科院分区:
化学2区
文献类型:
--
作者:
尹桂林;王瑞;印杰;姜学松

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以市售聚丙二醇二缩水甘油醚和JeffamineL100为原料,通过亲核取代/开环反应,再用含氟烷基羧酸对骨架上的羟基进行官能化处理,合成了具有多刺激响应性的接枝氟化聚醚胺S(FgPEAs)。FgPEA是由亲水性的短链聚氧乙烷(PEO)和疏水的氟化烷基链交替接枝在聚环氧丙烷(PPO)主链上形成的规整结构。在水溶液中,fgPEA11和fgPEA12自组装成多分散胶束,而fgPEA13形成尺寸均匀的微胶束,直径约200 nm。从fgPEA得到的胶束对温度、pH和离子强度具有多重响应,浊点(Cp)可调。值得注意的是,FgPEAS水溶液的CP随接枝含氟烷基链数量的增加而增大。
Well-defined multi-stimuli responsive fluorinated graft poly(ether amine)s (fgPEAs) were synthesized through nucleophilic substitution/ring-opening reaction of commercial poly(propylene glycol) diglycidyl ether and Jeffamine L100, followed by functionalization of hydroxyl groups in backbone by fluorinated alkyl carboxylic acid. fgPEAs are comprised of hydrophilic short poly(ethylene oxide) (PEO) and hydrophobic fluorinated alkyl chains, which are grafted on poly(propylene oxide) (PPO) backbone alternately to form well-defined structure. In aqueous solution, fgPEA11 and fgPEA12 self-assembled into multi-dispersed micelles, while fgPEA13 formed the uniform-sized micro-micelles with diameter of about 200 nm. These obtained micelles from fgPEAs were multi-responsive to temperature, pH and ionic strength with tunable cloud point (CP). It’s notable that CP of fgPEAs aqueous solution increased with the increasing amount of graft fluorinated alkyl chains.
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