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Ultraviolet Light Catalyzed Gelation of 3-Methacryloxypropyltrimethoxysilane via Altered Silicate Spatial Structure
Li Wei1, Wu Yonggang1, Shen Shukun1
1School of Materials Science and Engineering, Shaanxi Normal University , Xi'an 710062, People's Republic of China.
The Journal of Physical Chemistry. B
|August 10, 2016
Summary
This study presents a novel UV-assisted method for rapidly forming transparent hybrid gels from 3-methacryloxypropyltrimethoxysilane (MAPTMS). The process involves hydrolytic polycondensation, offering a new strategy for organotrialkoxysilane sol-gel applications.
Area of Science:
- Materials Science
- Chemistry
Background:
- Conventional methods for gelling 3-methacryloxypropyltrimethoxysilane (MAPTMS) are often challenging.
- Developing efficient and rapid gelation techniques for hybrid materials is crucial.
Purpose of the Study:
- To introduce a novel, one-step approach for creating transparent and firm hybrid gel materials using MAPTMS.
- To investigate the mechanism of UV-induced gelation in MAPTMS sols.
Main Methods:
- Hydrolysis of MAPTMS in an acidified aqueous solution to form a homogeneous sol.
- UV irradiation of the MAPTMS sol to induce gelation.
- Analysis of the Si-O-Si skeleton structure and the gelation mechanism.
Main Results:
- A transparent and firm hybrid gel was successfully formed rapidly via a one-step UV-assisted process.
- UV irradiation alters the Si-O-Si skeleton structure through hydroxyl radicals.
- Gelation primarily results from the hydrolytic polycondensation of MAPTMS, not the polymerization of its substituent groups.
Conclusions:
- The study demonstrates a concise photoinduced gelation strategy for MAPTMS.
- UV irradiation's role in altering the Si-O-Si structure and promoting polycondensation is elucidated.
- This research provides new insights into the sol-gel process of organotrialkoxysilanes under UV light.
