Encapsulation of Clay within Polymer Particles in a High-Solids Content Aqueous Dispersion

被引：25
作者：
Reyes, Yuri [1 ]
Peruzzo, Pablo J. [1 ]
Fernandez, Mercedes [2 ]
Paulis, Maria [1 ]
Leiza, Jose R. [1 ]
机构：
[1] Univ Basque Country UPV EHU, POLYMAT, Kimika Aplikatua Saila, Joxe Mari Korta Zentroa,Kim Zientzien Fak, Donostia San Sebastian 20018, Spain
[2] Univ Basque Country UPV EHU, POLYMAT, Polimeroen Zientzia & Telmol Saila, Joxe Mari Korta Zentroa,Kim Zientzien Fak, Donostia San Sebastian 20018, Spain
来源：
LANGMUIR | 2013年 / 29卷 / 31期
关键词：
MINIEMULSION POLYMERIZATION; EMULSION POLYMERIZATION; MODIFIED MONTMORILLONITE; POLY(VINYL ALCOHOL); VINYL-ACETATE; NANOCOMPOSITES; MORPHOLOGY; PLATELETS; KINETICS; BLENDS;
D O I：
10.1021/la401301s
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
By using a two-step polymerization process, it was possible to encapsulate clay platelets within polymer particles dispersed in water. First, seed polymer particles with chemically bonded clay were obtained by batch miniemulsion polymerization. Then, the clay was buried within the particles by the addition of neat monomer in a second step. The final stable dispersions can have a solids content of up to 50 wt %. Transmission electron microscopy images clearly show the presence of clay platelets inside the polymer colloids, although they are not totally exfoliated. The obtained nanocomposites showed an increase in both the storage modulus in the rubbery state and the water resistance as the clay content increases. The approach presented here might be useful for encapsulating other high-aspect ratio nanofillers.
引用
收藏
页码：9849 / 9856
页数：8
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