HYDROGELS OF CELLULOSE ACETATE CROSSLINKED WITH PYROMELLITIC DIANHYDRIDE - PART I: SYNTHESIS AND SWELLING KINETICS

被引：14

作者：

Oliveira, Victor A. ^{[1
]}

Veloso, Tacia C. ^{[1
]}

Leao, Versiane A. ^{[1
]}

dos Santos, Claudio G. ^{[2
]}

Botaro, Vagner R. ^{[3
]}

机构：

[1] Univ Fed Ouro Preto, Dept Engn Met, BR-35400000 Ouro Preto, MG, Brazil

[2] Univ Fed Ouro Preto, Dept Quim, BR-35400000 Ouro Preto, MG, Brazil

[3] Univ Fed Sao Carlos, Dept Quim, BR-18052780 Sorocaba, SP, Brazil

来源：

QUIMICA NOVA | 2013年 / 36卷 / 01期

关键词：

cellulose acetate; hydrogel; PMDA; DRUG-DELIVERY; SUPERABSORBENT HYDROGELS; ACID) HYDROGELS; RELEASE; WATER; COPOLYMERS; BEHAVIOR; SUBSTITUTION; TRANSPORT; SORPTION;

D O I：

10.1590/S0100-40422013000100019

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

This work describes the synthesis of hydrogels of cellulose acetate (AC) crosslinked with 1,2,4,5-benzenotetracarboxylic dianhydride (PMDA). The crosslinking reaction was monitored by FTIR. Analysis of aromatic fragments from the alkaline hydrolysis of the gels by UV spectroscopy indicated that an increase in the stoichiometric ratio of dianhydride resulted in higher degrees of crosslinking. The non-porous nature of the gels was confirmed by analysis of nitrogen adsorption. Water absorption isotherms showed that as the temperature and degree of crosslinking increased, the percentage of water absorbed at equilibrium (%S-eq) also increased. The hydrogels presented second order swelling kinetics.

引用

页码：102 / 106

页数：5

共 24 条

[1]

Ali A. E., 2007, EUR POLYM J, V39, P2337

[2] Superabsorbent hydrogels for removal of divalent toxic ions. Part I: Synthesis and swelling characterization [J].

Bajpai, SK ;

Johnson, S .

REACTIVE & FUNCTIONAL POLYMERS, 2005, 62 (03) :271-283

[3] Synthesis and characterisation of hydrogels based on poly(vinyl pyrrolidone) [J].

Benamer, S. ;

Mahlous, M. ;

Boukrif, A. ;

Mansouri, B. ;

Youcef, S. Larbi .

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS, 2006, 248 (02) :284-290

[4] Preparation and characterization of pH sensitive poly(N-vinyl-2-pyrrolidone/itaconic acid) copolymer hydrogels [J].

Chen, KS ;

Ku, YA ;

Lin, HR ;

Yan, TR ;

Sheu, DC ;

Chen, TM ;

Lin, FH .

MATERIALS CHEMISTRY AND PHYSICS, 2005, 91 (2-3) :484-489

[5]

Colombo, 2000, Pharm Sci Technol Today, V3, P198, DOI 10.1016/S1461-5347(00)00269-8

[6] Synthesis and characterization of AB-crosslinked graft copolymers based on maleilated chitosan and N-isopropylacrylamide [J].

Don, TM ;

Chen, HR .

CARBOHYDRATE POLYMERS, 2005, 61 (03) :334-347

[7] Cellulose esters in drug delivery [J].

Edgar, Kevin J. .

CELLULOSE, 2007, 14 (01) :49-64

[8]

Ende MTA, 1997, J CONTROL RELEASE, V48, P47

[9] An efficient method for determination of the degree of substitution of cellulose esters of long chain aliphatic acids [J].

Freire, CSR ;

Silvestre, AJD ;

Neto, CP ;

Rocha, RMA .

CELLULOSE, 2005, 12 (05) :449-458

[10] Effect of acetyl content on the sorption isotherm of water by cellulose acetate: comparison with the thermal analysis results [J].

Gocho, H ;

Shimizu, H ;

Tanioka, A ;

Chou, TJ ;

Nakajima, T .

CARBOHYDRATE POLYMERS, 2000, 41 (01) :83-86

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