Graft Polymerization of Vinyl Monomers onto Titanium Dioxide Modified with Alcoholic Hydroxyl Groups Initiated by the System Consisting of Ceric Ion and Alcoholic Hydroxyl Groups of the Surface

DOI Web Site 2 Citations 19 References

Bibliographic Information

Other Title
  • アルコール性水酸基で修飾した二酸化チタンとセリウムイオン系で開始される粒子表面へのビニルモノマーのグラフト重合
  • アルコールセイ スイサンキ デ シュウショクシタ 2サンカ チタン ト セリウ

Search this article

Abstract

To modify the surface of polymethysiloxane (PMS) -coated titanium dioxide which was modified with alcoholic hydroxyl groups (Ti/Si-R-OH), we investigated the grafting of hydrophilic polymers by the radical graft polymerization initiated by the system consisting of ceric ion and alcoholic hydroxyl groups on the surface. The radical polymerizations of acrylamide (AAm), N, N-diethylacrylamide (DEAM), and N-isopropylacrylamide (NIPAM) are successfully initiated by the surface radicals formed by the redox reaction of ceric ions with alcoholic hydroxyl groups of the surface and the corresponding polymers were grafted onto Ti/Si-R-OH : The percentage of PAAm grafting reached to 24. 9% after 90 min at 30°C. By the grafting of these hydrophilic polymers onto Ti/Si-R-OH surface, the surface wettability turned from hydrophobic to hydrophilic and the dispersibility in water was remarkably improved. In addition, the dispersibility of PDEAM- and PNIPAM-grafted Ti/Si-R-OH in water was readily controlled by the temperature of dispersant. These polymer-grafted Ti/Si-R-OH gave a stable dispersion in water at below LCST (lower critical solution temperature) of the polymers, i. e., 32°C, but immediately precipitated above the temperature.

Journal

Citations (2)*help

See more

References(19)*help

See more

Keywords

Details 詳細情報について

Report a problem

Back to top