Polydimethylsiloxane/silica/titania composites prepared by solvent-free sol-gel technique

被引：20
|
作者：
Alexandru, Mihaela [1 ]
Cazacu, Maria [1 ]
Nistor, Alexandra [1 ]
Musteata, Valentina E. [1 ]
Stoica, Iuliana [1 ]
Grigoras, Cristian [1 ]
Simionescu, Bogdan C. [1 ,2 ]
机构：
[1] Petru Poni Inst Macromol Chem, Iasi 700487, Romania
[2] Gh Asachi Tech Univ Iasi, Dept Nat & Synthet Polymers, Iasi 700050, Romania
来源：
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY | 2010年 / 56卷 / 03期
关键词：
Composites; Sol-gel technique; Polysiloxanes; Titania; Silica; INCORPORATING PYRITE POWDERS; OPTICAL-PROPERTIES; ELASTOMERIC NETWORKS; ACTUATION ELEMENTS; HYBRID MATERIALS; SILICA; NANOCOMPOSITES; SURFACE; TIO2; PRECIPITATION;
D O I：
10.1007/s10971-010-2307-5
中图分类号：
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Composites based on polydimethylsiloxane incorporating silica and titania were prepared by mixing polydimethylsiloxane with proper oxides precursors, tetraethyl-orthosilicate and tetrabutyl-orthotitanate. In the presence of environmental humidity and in acid catalysis, hydrolysis/condensation processes take place with formation of oxides and concomitantly polymer crosslinking. Partial replacement of SiO(2) in a polydimethylsiloxane/silica composite with titania (both generated in situ by sol-gel process) affects surface hydrophilicity (evaluated by dynamic contact angle), water vapor sorption ability (determined by dynamic vapor sorption) and thermal stability. The dielectric properties are also controlled by composition.
引用
收藏
页码：310 / 319
页数：10
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