Multi-layered polymerized high internal phase emulsions with controllable porosity and strong interfaces
Multi-layered polymerized high internal phase emulsions with controllable porosity and strong interfaces
复制标题
具有可控孔隙率和强界面的多层聚合高内相乳液
DOI：
10.1016/j.polymer.2021.124116
复制
发表时间：
2021
期刊：
影响因子：
4.6
通讯作者：
Ayres, Neil
中科院分区：
文献类型：
--
作者：
McKenzie, Tucker J.;Smail, Soren;Rost, Kathryn;Rishi, Kabir;Beaucage, Gregory;Ayres, Neil
包括生物材料界面、添加剂制造和分离膜在内的新应用需要具有梯度形态或化学组成的多孔弹性体。然而，具有孔隙度梯度的弹性体通常很难制备，需要缓慢的多步骤合成技术。本文采用一步法合成了具有特定界面的层状孔隙率聚二甲基硅氧烷(PDMS)高内相乳液。通过改变乳液中水分散相的体积来控制所制备的聚HIPE的总孔隙率、孔径和比表面积。扫描电子显微镜图像分析和层状孔隙率聚HIPE的孔径计算表明，乳液构图方法没有破坏乳液的形态，保持了清晰的孔隙率界面。总孔隙率决定了聚HIPE的存储模数，其中高孔隙率材料的观测模数最低，为~70-90千帕。拉伸测试表明，两层之间的界面是机械坚固的，在断裂伸长率实验中不会分裂。这项工作提供了一种简单的技术来制备基于PDMS的层状多孔性聚HIPE，该聚HIPE具有多达五个可调的多孔层，各层之间具有牢固的界面。
Porous elastomers possessing gradient morphology or chemistry are needed for new applications including biomaterial interfaces, additive manufacturing, and separation membranes. However, elastomers possessing a porosity gradient are often difficult to prepare requiring slow multistep synthesis techniques. In this work, layered porosity polydimethylsiloxane (PDMS)-based polymerized high internal phase emulsions (polyHIPEs) with defined interfaces have been synthesized using one-step reactions. The total porosity, pore size, and surface area of the prepared polyHIPEs are controlled by varying the volume of aqueous dispersed phase in the emulsion. Analysis of SEM images and pore size calculations of layered porosity polyHIPEs proved the emulsion patterning method did not disrupt emulsion morphology and a clear porosity interface was maintained. Total porosity values dictate the storage moduli of the polyHIPEs, where highly porous materials possess the lowest observed moduli of ~70–90 kPa. Tensile testing shows that the interface between two layers is mechanically robust and does not split during elongation at break experiments. This work provides a simple technique to prepare layered porosity PDMS-based polyHIPEs having up to five tunable porosity layers with strong interfaces between the layers.
登录
查看更多内容
使用硫醇-烯点击化学可以独立控制软 PDMS PolyMIPE 的储能模量和孔隙率
影响因子：
5.5
作者：
McKenzie, Tucker J.;Heaton, Paul S.;Rishi, Kabir;Kumar, Raj;Brunet, Thomas;Beaucage, Gregory;Mondain-Monval, Olivier;Ayres, Neil
通讯作者：
Ayres, Neil
用于骨科界面组织再生的空间控制模板化水凝胶。
影响因子：
7.015
作者：
Michael T. Frassica;Connor J Demott;E. M. Ramírez;M. Grunlan
通讯作者：
M. Grunlan
影响因子：
6.1
作者：
Ilavsky, Jan;Zhang, Fan;Allen, Andrew J.
通讯作者：
Allen, Andrew J.
影响因子：
5.2
作者：
Hejna, Aleksander;Kosmela, Paulina;Piszczyk, Lukasz
通讯作者：
Piszczyk, Lukasz
影响因子：
4.6
作者：
Johnson, D. W.;Langford, C. R.;Cameron, N. R.
通讯作者：
Cameron, N. R.