Swelling properties of thermoresponsive/hydrophilic co-networks with functional crosslinked domain structures†,Polymer Chemistry

当前位置： X-MOL 学术 › Polym. Chem. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Swelling properties of thermoresponsive/hydrophilic co-networks with functional crosslinked domain structures†
Polymer Chemistry ( IF 4.1 ) Pub Date : 2018-01-03 00:00:00 , DOI: 10.1039/c7py01793f
Shohei Ida _{1,

2,

3,

4} , Hironobu Kitanaka _{1,

2,

3,

4} , Tatsuya Ishikawa _{1,

2,

3,

4} , Shokyoku Kanaoka _{1,

2,

3,

4} , Yoshitsugu Hirokawa _{1,

2,

3,

4}

Affiliation

For the fine control of the thermoresponsive properties of polymer hydrogels, we focused on the monomer and crosslinker sequence in a network. In this paper, we designed novel thermoresponsive/hydrophilic polymer co-networks with functional crosslinked domain (CD) structures such as a thermoresponsive network with hydrophilic CDs (D_CDN gel) and a hydrophilic network with thermoresponsive CDs (N_CDD gel). The gel synthesis was based on post-polymerization crosslinking of triblock prepolymers with reactive sites in the outer blocks. The obtained gels showed larger, sharper, and more rapid volume transitions in response to temperature change as compared to the corresponding gel with a random monomer/crosslinker sequence as well as a randomly crosslinked polymer co-network with the same composition. In addition, significant differences were observed in the transition temperature and shrinking kinetics between D_CDN and N_CDD gels with the same composition and a similar network structure, and the swelling behavior was also controlled by the composition of the triblock prepolymers. These results indicated that the domain structure in the network could effectively function and the monomer/crosslinker sequence exerts a strong effect on the swelling behavior of the gels.

中文翻译：

具有功能性交联域结构的热敏/亲水共网络的溶胀特性†

为了更好地控制聚合物水凝胶的热响应特性，我们重点研究了网络中的单体和交联剂序列。在本文中，我们设计了具有功能性交联域（CD）结构的新型热响应/亲水聚合物共网络，例如具有亲水CD的热响应网络（D _CD N凝胶）和具有热响应CD的亲水网络（N _CD D凝胶）。凝胶合成是基于三嵌段预聚物在外嵌段中具有反应性位点的聚合后交联。与具有无规单体/交联剂序列以及具有相同组成的无规交联聚合物共网络的相应凝胶相比，所获得的凝胶响应于温度变化而显示出更大，更锐利和更快的体积转变。另外，在D _CD N和N _CD D之间观察到转变温度和收缩动力学的显着差异。具有相同组成和相似网络结构的凝胶，其溶胀行为也由三嵌段预聚物的组成控制。这些结果表明网络中的域结构可以有效地起作用，并且单体/交联剂序列对凝胶的溶胀行为具有强烈的影响。

更新日期：2018-01-03

点击分享查看原文

点击收藏

阅读更多本刊最新论文本刊介绍/投稿指南11