Asymmetric Block Extension of Star‐Shaped [PEG‐SH]<sub>4</sub> – toward Poly(dehydroalanine)‐Functionalized PEG Hydrogels for Catch and Release of Charged Guest Molecules
作者:Kathrin Kowalczuk、Peter J. Mons、Hans F. Ulrich、Valentin D. Wegner、Johannes C. Brendel、Alexander S. Mosig、Felix H. Schacher
DOI:10.1002/mabi.202300230
日期:2024.2
With the incorporation of polyampholytic segments into soft matter, hydrogels can serve as a reservoir for a variety of charged molecules which can be caught and released upon changes in pH value. Asymmetric block extension of one arm for star-shaped poly(ethylene glycol) [PEG26-SH]4 using short segments of polyampholytic poly(dehydroalanine) (PDha) is herein demonstrated while maintaining the functional
通过将多两性片段掺入软物质中,水凝胶可以作为各种带电分子的储存库,这些带电分子可以在 pH 值变化时被捕获和释放。本文证明了使用多两性聚(脱氢丙氨酸)(PDha)的短片段对星形聚(乙二醇)[PEG 26 -SH] 4的一臂进行不对称嵌段延伸,同时保持用于网络形成的功能性硫醇端基。对于随后的 PDha 含量高达 10 wt.% 的水凝胶合成,采用了简单且生物相容的光引发硫醇-烯点击反应。对水凝胶溶胀特性的研究揭示了对离子强度和 pH 值变化的响应行为。此外,通过 UV-vis 测量研究了模型染料亚甲基蓝 (MB) 和酸性橙 7 (AO7) 的可逆吸附,并且该过程可以成功转移到粘附肽 RGDS 的吸附,导致吸收 1.5 wt %RGDS 相对于水凝胶的干重。