在硅溶胶中加入八甲基环四硅氧烷(D4)和偶联剂γ-(2,3-环氧丙氧)丙基三甲氧基硅烷(KH560),以十二烷基苯磺酸(DBSA)催化D4的开环聚合,借助超声强化聚二甲基硅氧烷(PDMS)和偶联剂对硅溶胶的表面改性.将改性硅溶胶及其混合物分散在甲基丙烯酸甲酯(MMA)和丙烯酸丁酯(BA)的混合单体中,实施微滴乳液聚合,制备SiO2/聚丙烯酸酯纳米复合材料.硅溶胶改性阶段的催化剂中和后成为后续微滴乳液聚合的乳化剂,而伴生的PDMS成为有效抑制单体珠滴Ostwald熟化的超疏水剂.采用FTIR、TGA、TEM、马尔文纳米粒度仪、水接触角等测试方法对改性纳米粒、复合胶乳和胶乳薄膜进行表征.结果表明,PDMS和偶联剂在SiO2表面形成了共价键合和包覆,且伴生的PDMS改善了复合胶乳薄膜的表面疏水性,复合粒子是聚合物基体为壳、SiO2纳米颗粒呈海岛分散的(多)核-壳结构形态,SiO2占单体质量分数为3％时,平均粒径约98 nm.
参考文献
| [1] | 吴春蕾,章明秋,容敏智.纳米SiOs表面接枝聚合改性及其聚丙烯基复合材料的力学性能[J].复合材料学报,2002,19(6):61-67.Wu Chunlei,Zhang Mingqiu,Rong Minzhi.Grafting polymerization onto nanosilica and its effect on mechanical properties of PP composites[J].Acta Materiae Compositae Sinica,2002,19(6):61-67. |
| [2] | Zhao S,Zhang J,Zhao S,Li W,Li H.Effect of inorganicorganic interface adhesion on mechanical properties of Al2O3/polymer laminate composites[J].Compos Sci Technol,2003,63(7):1009-1014. |
| [3] | Thomas H,Dorothée V S.Polymer-nanoparticle composites:From synthesis to modern applications[J].Materials,2010,3(6):3468-3517. |
| [4] | Zou Hua,Wu Shishan,Shen Jian.Polymer/silica nanocomposites:Preparation,characterization,properties,and applications[J].ChemRev,2008,108(9):3893-3957. |
| [5] | Bourgeat-Lami E,Lansalot M.Organic/inorganic composite latexes:The marriage of emulsion polymerization and inorganic chemistry[J].Adv Polym Sci,2010,233:53-123. |
| [6] | Hideki S,Kazuki D,Eiji N,Yutaka O,Takashi Y,Katsuhiro I.Preparation and properties of poly (methyl methacrylate) silica hybrid materials incorporating reactive silica nanoparticles[J].Polymer,2006,47 (11):3754-3759. |
| [7] | Bourgeat-Lami E,Farzi G A,David L,Putaux J L,McKenna T F L.Silica encapsulation by miniemulsion polymerization:Distribution and localization of the silica particles in droplets and latex particles[J].Langmuir,2012,28(14):6021-6031. |
| [8] | Clemens K W,Katharina L.Miniemulsion polymerization as a means to encapsulate organic and inorganic materials[J].Adv Polym Sci,2010,233:185-236. |
| [9] | Jose M A.Miniemulsion polymerization[J].Prog Polym Sci,2002,27(7):1283-1346. |
| [10] | Gareth J P,Matthew P H,Emma N K W,Ali M P.Ultrasonically assisted synthesis and degradation of poly(dimethylsiloxane)[J].Polymer,1996,37(12):2303-2308. |
| [11] | Kenneth S S,Gareth J P.Applications of ultrasound to materials chemistry[J].Annu Rev Mater Sci,1999,29:295-326. |
| [12] | Zhang K,Park B J,Fang F F,Choi H J.Sonochemical preparation of polymer nanocomposites[J].Molecules,2009,14:2095-2110. |
| [13] | Monrita K,Hu Y,Mackenzie J D.The effects of ultrasonic irradiation on the preparation and properties of ormosils[J].Journal of Sol-Gel Science and Technology,1994,3(2):109-116. |
| [14] | Iwamoto T,Mackenzie J D.Hard ormosils prepared with ultrasonic irradiation[J].Journal of Sol-Gel Science and Technology,1995,4(2):141-150. |
| [15] | Alsten Van J.Experimental measurements of local mobility in adsorbed poly (dimethyl siloxane) layers[J].Macromolecules,1991,24(19):5320-5323. |
| [16] | Zou Mingxuan,Huang Fangzhi,Nie Jun,Zhang Zhicheng,Ge Xuewu.Preparation and characterization of polysiloxanepolyacrylates composite latices and their film properties[J].Polym Int,2005,54(6):861-869. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%