Full-Text Search:
Home|Journal Papers|About CNKI|User Service|FAQ|Contact Us|中文
《Chinese Journal of Geriatric Dentistry》 2003-01
Add to Favorite Get Latest Update

Study of adsorption mechanism of the silane coupling agent onto the surface of barium glass

NIU Guang-liang, WANG Tong, XU Heng-chang, SHEN De-yan, (Dental Material Research Lab, School of Stomatology, Beijing University, Beijing 100081.)  
Objective: To study the adsorption mechanism of a silane coupling agent y-MPS on the surface of barium glass. Methods: The silanated and unsilanated barium glass powders were measured by using diffuse reflectance Forier transform infrared (DRIFT) spectroscopy, and the DRIFT bands were analyzed using difference spectrum method. Results: (1) The free OH-groups on the surface of the silanated barium glass were disappeared, and at the interface between y-MPS and the barium glass, there were characteristic DRIFT bands of Si-O-Si groups, Si-O-Al groups and Si-O-B groups. (2) Chemical adsorption was happened between y-MPS and barium glass. The adsorption mechanism was that the free OH-groups on the surface of barium glass condensed with the Si-OH groups of y-MPS which had hydrolyzed, to form covalent bonds mainly comprising Si-O-M groups. Conclusions: The present study revealed the mechanism and essence of the interface between the silane coupling agent y-MPS and barium glass on the molecular level. These could provide the theoretical basis for the usage of barium glass fillers in dental composite resins and for the development of modern composite
【CateGory Index】: R783.1
Download(CAJ format) Download(PDF format)
CAJViewer7.0 supports all the CNKI file formats; AdobeReader only supports the PDF format.
©2006 Tsinghua Tongfang Knowledge Network Technology Co., Ltd.(Beijing)(TTKN) All rights reserved