Vibrational spectroscopy in the development of surface hydrophilic elastomer latex (SHEL) |
| |
| Affiliation: | 1. Faculty of Biological Sciences, Shahid Beheshti University, G.C. Evin, Tehran, Islamic Republic of Iran;2. School of Life Sciences, University of Technology Sydney, PO Box 123, Broadway, NSW 2007, Australia;1. Graduate Institute of Applied Science and Technology, National Taiwan University of Science and Technology, Taipei 106, Taiwan, ROC;2. Division of Nephrology, Department of Internal Medicine, Mackay Memorial Hospital, Taipei, Taiwan, ROC;3. Graduate Institute of Medical Science, Taipei Medical University, Taipei, Taiwan, ROC;4. National Applied Research Laboratories, Instrument Technology Research Center, Hsinchu, Taiwan, ROC;1. Institute of Technical Thermodynamics, RWTH Aachen University, Schinkelstr.8, 52062 Aachen, Germany;2. Institute of Thermodynamics and Thermal Process Engineering, Stuttgart University, Pfafffenwaldring 9, 70569 Stuttgart, Germany |
| |
| Abstract: | An illustrative example is given to show how various vibrational spectroscopy techniques coupled with two-dimensional (2D) correlation analysis can be effectively utilized in the development of a novel and functional material. Surface-hydrophilic elastomer latex (SHEL) is a material exhibiting rather unusual permanently water-wettable surface feature despite having a soft and rubbery bulk property, which can be successfully analyzed with vibrational spectroscopy. 2D photoacoustic (PAS) IR spectra of a SHEL film indicate the localized surface segregation of long-chain ethoxylate moiety of the oligomeric surfactant used in the preparation of this material. The accumulation of the hydrophilic long-chain ethoxylate produces the high energy polar surface over the hydrophobic bulk phase of SBR copolymer. The persistence of very low water contact angle, even after repeated washing of a SHEL film with an excess amount of water, indicates permanent covalent attachment of long-chain ethoxylate group to the SBR copolymer. 2D Raman spectra generated from the process monitoring of the emulsion copolymerization of SHEL reveal the mechanism of the covalent attachment of long-chain ethoxylate. The reaction involves a separate step of oleyl moiety of the block surfactant reacting with 1,3-butadiene prior to the onset of copolymerization to produce the SBR latex product. |
| |
| Keywords: | Vibrational spectroscopy Materials development Photoacoustic spectroscopy Raman process monitoring Two-dimensional correlation analysis |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
