Yu Kai, Han Yanchun
State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Graduate School of the Chinese Academy of Sciences, Changchun, 130022, P. R. China.
Soft Matter. 2006 Jul 20;2(8):705-709. doi: 10.1039/b602880m.
A PEO-tethered layer on a PDMS (polydimethylsiloxane) cross-linked network has been prepared by a swelling-deswelling process. During swelling, the PDMS block of a PDMS-b-PEO diblock copolymer penetrates into the PDMS substrate and interacts with PDMS chains because of the van der Waals force and hydrophobic interaction between them. Upon deswelling, the PDMS block is trapped in the PDMS matrix while the PEO, as a hydrophilic block, is tethered to the surface. The PEO-tethered layer showed stability when treated in water for 16 h. The surface fraction of PEO and the wetting property of the PEO-tethered PDMS surface can be controlled by the cross linking density of the PDMS matrix. A patterned PEO-tethered layer on a PDMS network was also created by microcontact printing and water condensation figures (CFs) were used to study the patterned surface with different wetting properties.
通过溶胀-去溶胀过程在聚二甲基硅氧烷（PDMS）交联网络上制备了聚环氧乙烷（PEO） tethered层。在溶胀过程中，PDMS-b-PEO二嵌段共聚物的PDMS嵌段由于它们之间的范德华力和疏水相互作用而渗透到PDMS基质中并与PDMS链相互作用。去溶胀后，PDMS嵌段被困在PDMS基质中，而作为亲水性嵌段的PEO则 tethered在表面上。PEO tethered层在水中处理16小时后表现出稳定性。PEO的表面分数和PEO tethered PDMS表面的润湿性可以通过PDMS基质的交联密度来控制。还通过微接触印刷在PDMS网络上创建了图案化的PEO tethered层，并使用水凝聚图形（CFs）来研究具有不同润湿性的图案化表面。
