Monolithic nanoporous-crystalline aerogels based on PPO

被引:39
作者
Daniel, Christophe [1 ,2 ]
Longo, Simona [1 ,2 ]
Cardea, Stefano [3 ]
Vitillo, Jenny G. [4 ,5 ]
Guerra, Gaetano [1 ,2 ]
机构
[1] Univ Salerno, Dept Biol & Chem, INSTM Res Unit, I-84084 Fisciano, SA, Italy
[2] Univ Salerno, Dept Biol & Chem, NANOMATES Res Unit, I-84084 Fisciano, SA, Italy
[3] Univ Salerno, Dept Ind Engn, I-84084 Fisciano, SA, Italy
[4] Univ Turin, Dipartimento Chim, I-10125 Turin, Italy
[5] Univ Turin, NIS Ctr Excellence, I-10125 Turin, Italy
关键词
SYNDIOTACTIC POLYSTYRENE; X-RAY; POLY(2,6-DIMETHYL-1,4-PHENYLENE OXIDE); MOLECULAR-COMPOUND; MELTING BEHAVIOR; DELTA(E) FORM; PHASES; ADSORPTION; SORPTION; FILMS;
D O I
10.1039/c2ra22325b
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Monolithic and robust aerogels exhibiting nanoporous-crystalline modifications of an industrially relevant polymer (poly(2,6-dimethyl-1,4-phenylene)oxide, generally known as polyphenyleneoxide, PPO), have been obtained from thermoreversible gels, by sudden solvent extraction with supercritical carbon dioxide. The aerogel formation occurs only in the presence of semicrystalline nanofibrils of syndiotactic polystyrene, a polymer presenting molecular miscibility with PPO in the amorphous phase. These mixed monolithic aerogels can present nanoporous-crystalline phases of both polymers and hence are very promising for water and air purification. For instance, the carbon tetrachloride uptake from 10 ppm aqueous solutions can be as high as 19 wt%.
引用
收藏
页码:12011 / 12018
页数:8
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