当前位置：
X-MOL 学术
›
Soft Matter
›
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.)
Double cross-linked supramolecular hydrogels with tunable properties based on host-guest interactions.
Soft Matter ( IF 2.9 ) Pub Date : 2020-06-26 , DOI: 10.1039/d0sm00833h Yunjiao Che 1 , Jens Gaitzsch 2 , Nikolai Liubimtsev 1 , Stefan Zschoche 2 , Tim Bauer 3 , Dietmar Appelhans 2 , Brigitte Voit 1
Soft Matter ( IF 2.9 ) Pub Date : 2020-06-26 , DOI: 10.1039/d0sm00833h Yunjiao Che 1 , Jens Gaitzsch 2 , Nikolai Liubimtsev 1 , Stefan Zschoche 2 , Tim Bauer 3 , Dietmar Appelhans 2 , Brigitte Voit 1
Affiliation
|
We report a novel double cross-linked hydrogel system based on polyacrylamide and poly(2-methyl-2-oxazoline) (PMOXA) network chains, as well as on supramolecular host–guest interactions with on-demand tailored mechanical properties. Well-defined vinyl-bearing PMOXA macromonomers, functionalized with either β-cyclodextrin units (β-CD–PMOXA) or adamantane units (Ada–PMOXA), were synthesized and confirmed using 1H NMR, MALDI-TOF-MS and GPC measurements. The complexation between adamantane and β-CD modified macromonomers in solution towards bismacromonomers was confirmed by 2D NOESY NMR and DLS. After introducing these bismacromonomers into the polyacrylamide hydrogel, the supramolecular non-covalent Ada/β-CD bond was responsible for the presence of PMOXA network chains to form a dense network. Once the interactions broke, the PMOXA chains no longer contributed to the network, but became dangling graft side chains in a predominated polyacrylamide network. Their dissociative nature influenced the physical properties, including the swelling behavior and mechanics of the final hydrogel. Rheological experiments proved that the E-modulus of the network was significantly increased by the supramolecular host–guest interactions. Tuning the lengths of PMOXA network chains even allowed the modification of the changes in mechanical strength, also through the addition of free β-CD. The tunable properties of the double cross-linked supramolecular hydrogel proved their unique strength for future applications.
中文翻译：
基于宿主-客体相互作用具有可调性质的双交联超分子水凝胶。
我们报道了一种基于聚丙烯酰胺和聚（2-甲基-2-恶唑啉）（PMOXA）网络链的新型双交联水凝胶系统，以及超分子宿主与客体的相互作用以及按需定制的机械性能。合成了定义明确的带有乙烯基的PMOXA大分子单体，并用β-环糊精单元（β-CD–PMOXA）或金刚烷单元（Ada–PMOXA）进行了功能化，并使用11 H NMR，MALDI-TOF-MS和GPC测量。通过二维NOESY NMR和DLS证实金刚烷与β-CD修饰的大分子单体在溶液中向双大分子单体的络合。将这些双宏观单体引入聚丙烯酰胺水凝胶后，超分子非共价Ada /β-CD键负责PMOXA网络链的存在以形成致密网络。一旦相互作用中断，PMOXA链不再有助于网络，而是在占主导地位的聚丙烯酰胺网络中悬挂了接枝的侧链。它们的解离性质影响了物理性质，包括最终水凝胶的溶胀行为和力学。流变学实验证明，超分子主客体相互作用显着增加了网络的E模量。调节PMOXA网络链的长度甚至还可以通过添加游离的β-CD来改变机械强度的变化。双重交联的超分子水凝胶的可调性能证明了其在未来应用中的独特优势。
更新日期：2020-07-29
中文翻译：
基于宿主-客体相互作用具有可调性质的双交联超分子水凝胶。
我们报道了一种基于聚丙烯酰胺和聚（2-甲基-2-恶唑啉）（PMOXA）网络链的新型双交联水凝胶系统，以及超分子宿主与客体的相互作用以及按需定制的机械性能。合成了定义明确的带有乙烯基的PMOXA大分子单体，并用β-环糊精单元（β-CD–PMOXA）或金刚烷单元（Ada–PMOXA）进行了功能化，并使用11 H NMR，MALDI-TOF-MS和GPC测量。通过二维NOESY NMR和DLS证实金刚烷与β-CD修饰的大分子单体在溶液中向双大分子单体的络合。将这些双宏观单体引入聚丙烯酰胺水凝胶后，超分子非共价Ada /β-CD键负责PMOXA网络链的存在以形成致密网络。一旦相互作用中断，PMOXA链不再有助于网络，而是在占主导地位的聚丙烯酰胺网络中悬挂了接枝的侧链。它们的解离性质影响了物理性质，包括最终水凝胶的溶胀行为和力学。流变学实验证明，超分子主客体相互作用显着增加了网络的E模量。调节PMOXA网络链的长度甚至还可以通过添加游离的β-CD来改变机械强度的变化。双重交联的超分子水凝胶的可调性能证明了其在未来应用中的独特优势。
京公网安备 11010802027423号