Synthesis and characterization of aluminum or copper tungstophosphate and tungstosilicate immobilized in a polymeric blend

被引：16

作者：

Fuchs, Vanesa M. ^{[1
]}

Pizzio, Luis R. ^{[1
]}

Blanco, Mirta N. ^{[1
]}

机构：

[1] Natl Univ La Plata, Fac Ciencias Exactas, Dept Quim, UNLP CONICET,CINDECA, RA-1900 La Plata, Argentina

来源：

EUROPEAN POLYMER JOURNAL | 2008年 / 44卷 / 03期

关键词：

aluminum or copper Keggin salts; characterization; polymer-immobilized Keggin salts; hybrid materials;

D O I：

10.1016/j.eurpolymj.2007.12.017

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Aluminum or copper tungstophosphates and tungstosilicates were synthesized and immobilized in a polymeric blend formed by polyvinyl alcohol and polyethylene glycol using the freeze-thawing method. The salts retained the Keggin structure of the heteropolyanions during their synthesis and immobilization. Materials with spherical shape and a mean size of 2 mm were obtained, with an almost constant distribution of the salts along the sphere width. Besides, the immobilized salts presented very strong acid sites and good thermal stability. The synthesized hybrid materials present suitable properties to be used as heterogeneous acid catalysts which are very attractive for many processes as replacement of conventional liquid ones. (C) 2008 Elsevier Ltd. All rights reserved.

引用

页码：801 / 807

页数：7

共 20 条

[1] The acid-catalysed reaction of α-pinene over molybdophosphoric acid immobilised in dense polymeric membranes [J].

Castanheiro, JE ;

Ramos, AM ;

Fonseca, I ;

Vital, J .

CATALYSIS TODAY, 2003, 82 (1-4) :187-193

[2] Preparation and conductivity of polyvinyl alcohol (PVA) films composited with molybdotungstovanadogermanic heteropoly acid [J].

Cui, YL ;

Mao, HW ;

Wu, QY .

MATERIALS CHEMISTRY AND PHYSICS, 2004, 85 (2-3) :416-419

[3] CONJUGATED POLYMER-SUPPORTED CATALYSTS - POLYANILINE PROTONATED WITH 12-TUNGSTOPHOSPHORIC ACID [J].

HASIK, M ;

TUREK, W ;

STOCHMAL, E ;

LAPKOWSKI, M ;

PRON, A .

JOURNAL OF CATALYSIS, 1994, 147 (02) :544-551

[4] Heterogeneous liquid-phase hydration of isobutene by heteropoly acid-polymer composite film catalyst [J].

Lim, SS ;

Kim, YH ;

Park, GI ;

Lee, WY ;

Song, IK ;

Youn, HK .

CATALYSIS LETTERS, 1999, 60 (04) :199-204

[5] Entrapment of the alcohol dehydrogenase from Lactobacillus kefir in polyvinyl alcohol for the synthesis of chiral hydrophobic alcohols in organic solvents [J].

De Temiño, DM ;

Hartmeier, W ;

Ansorge-Schumacher, MB .

ENZYME AND MICROBIAL TECHNOLOGY, 2005, 36 (01) :3-9

[6]

Okuhara T, 1996, ADV CATAL, V41, P113, DOI 10.1016/S0360-0564(08)60041-3

[7] HARD AND SOFT ACIDS AND BASES [J].

PEARSON, RG .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1963, 85 (22) :3533-&

[8] Acid catalysts prepared by impregnation of tungstophosphoric acid solutions on different supports [J].

Pizzio, LR ;

Caceres, CV ;

Blanco, MN .

APPLIED CATALYSIS A-GENERAL, 1998, 167 (02) :283-294

[9] Isoamyl acetate production catalyzed by H3PW12O40 on their partially substituted Cs or K salts [J].

Pizzio, LR ;

Blanco, MN .

APPLIED CATALYSIS A-GENERAL, 2003, 255 (02) :265-277

[10]

Pizzio LR, 2002, STUD SURF SCI CATAL, V143, P731

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