A unique polymersome covered by loop-cluster polyamine corona,RSC Advances

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A unique polymersome covered by loop-cluster polyamine corona
RSC Advances ( IF 3.9 ) Pub Date : 2020-4-1 , DOI: 10.1039/c9ra10704e
Wen-Li Wang ₁ , Ren-Hua Jin ₁

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In this work, we synthesized a new comb-like copolymer (c-iMP) possessing amphiphilic diblock side chains consisting of poly(methyloxazoline) (PMOZ) and poly(phenyloxazoline) (PPOZ) via reversible addition-fragmentation chain-transfer (RAFT) polymerization of p-choloromethylstyene (CMS) and cationic ring-opening polymerization (CROP) of 2-methyl-2-oxazoline (MOZ) and 2-phenyl-2-oxazoline (POZ). Then, by performing selective hydrolysis of the hydrophilic PMOZ block, the PMOZ block was transformed into PEI (polyethylenimine) from which comb-like copolymers (c-iEP) possessing two blocks of PEI (E) and PPOZ (P) were produced. The comb-copolymers c-iEP showed unique self-assembling behavior in water to give an unusual polymersome covered by a loop-cluster polyamine corona. The polymersome showed extreme toughness and stability without collapse and fusion even at dry conditions and could be transformed into capsules. This is the first example of polymesome without free-ends on the vesicle wall which could include Ag ions inside and could deposit silica around the wall to form hybrid hollow spheres.

中文翻译：

一种由环簇聚胺电晕覆盖的独特聚合物体

在这项工作中，我们通过可逆加成-断裂链转移（RAFT）合成了一种具有由聚（甲基恶唑啉）（PMOZ）和聚（苯基恶唑啉）（PPOZ）组成的两亲二嵌段侧链的新型梳状共聚物（c-iMP ） p的聚合-氯甲基苯乙烯 (CMS) 和 2-甲基-2-恶唑啉 (MOZ) 和 2-苯基-2-恶唑啉 (POZ) 的阳离子开环聚合 (CROP)。然后，通过对亲水性 PMOZ 嵌段进行选择性水解，将 PMOZ 嵌段转化为 PEI（聚乙烯亚胺），由此产生具有 PEI（E）和 PPOZ（P）两个嵌段的梳状共聚物（c-iEP）。梳状共聚物 c-iEP 在水中表现出独特的自组装行为，从而产生了一种不寻常的聚合物体，其被环状簇聚胺电晕覆盖。即使在干燥条件下，聚合物囊泡也表现出极高的韧性和稳定性，不会塌陷和融合，并且可以转化为胶囊。这是第一个在囊泡壁上没有自由端的多聚体的例子，它可以在内部包含 Ag 离子，并且可以在壁周围沉积二氧化硅以形成混合空心球。

更新日期：2020-04-01

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