"Green" molecular weight degradation of chitosan using microwave irradiation

被引：76

作者：

Wasikiewicz, Jaroslaw M. ^{[1
]}

Yeates, Stephen G. ^{[1
]}

机构：

[1] Univ Manchester, Sch Chem, OMIC, Manchester M13 9PL, Lancs, England

来源：

POLYMER DEGRADATION AND STABILITY | 2013年 / 98卷 / 04期

关键词：

Chitosan; Microwave; Degradation; Molecular weight; Energy efficiency; ASSISTED ACID-HYDROLYSIS; RADIATION; ACETYLATION; CHITIN; INTENSITY; OLIGOMERS;

D O I：

10.1016/j.polymdegradstab.2012.12.028

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 [高分子化学与物理];

摘要：

Chitosan degradation in 0.1 M acetic acid solution by microwave radiation alone (without any additives and initiators) is reported. At the condition of reduced thermal effects of microwave heating degradation manifested most of typical features associated with mechanical (and or mechanochemical) degradations induced by shear forces, in this particular case oscillating molecules. At the absorbed energy dose of 9 MJ kg(-1) chitosan in 1% w/v solution degrades within 20 min to the weight average molecular weight of 30 kDa. Comparative evaluation of degradation yield of chain scission (G(s)) with other high energy radiations such as ultraviolet- and gamma radiation showed microwave to be the least efficient, but considering the environmental impact and low running costs it presents a viable alternative to obtain targeted molecular weights of charged polysaccharides. (C) 2013 Elsevier Ltd. All rights reserved.

引用

页码：863 / 867

页数：5

共 37 条

[1]

Products from microwave and ultrasonic wave assisted acid hydrolysis of chitin [J].

Ajavakom, Anawat ;

Supsvetson, Sulaleewan ;

Somboot, Aimjit ;

Sukwattanasinitt, Mongkol .

CARBOHYDRATE POLYMERS, 2012, 90 (01) :73-77

[2]

[Anonymous], 1996, US Patent Nr, Patent No. [5,482,843, 5482843, 5, 482, 843]

[3]

Molecular weight and degree of acetylation of high-intensity ultrasonicated chitosan [J].

Baxter, S ;

Zivanovic, S ;

Weiss, J .

FOOD HYDROCOLLOIDS, 2005, 19 (05) :821-830

[4]

CHARACTERIZATION OF CHITOSANS VIA COUPLED SIZE-EXCLUSION CHROMATOGRAPHY AND MULTIPLE-ANGLE LASER LIGHT-SCATTERING TECHNIQUE [J].

BERI, RG ;

WALKER, J ;

REESE, ET ;

ROLLINGS, JE .

CARBOHYDRATE RESEARCH, 1993, 238 :11-26

[5]

Charlesby A., 1960, ATOMIC RAD POLYM

[6]

Radiation-induced and sonochemical degradation of chitosan as a way to increase its fat-binding capacity [J].

Czechowska-Biskup, R ;

Rokita, B ;

Ulanski, P ;

Rosiak, JM .

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS, 2005, 236 :383-390

[7]

Kinetics of the thermal degradation of chitosan [J].

de Britto, Douglas ;

Campana-Filho, Sergio Paulo .

THERMOCHIMICA ACTA, 2007, 465 (1-2) :73-82

[8]

Water sorption and permeation in chitosan films: Relation between gas permeability and relative humidity [J].

Despond, S ;

Espuche, E ;

Domard, A .

JOURNAL OF POLYMER SCIENCE PART B-POLYMER PHYSICS, 2001, 39 (24) :3114-3127

[9]

An optimised method to determine the degree of acetylation of chitin and chitosan by FTIR spectroscopy [J].

Duarte, ML ;

Ferreira, MC ;

Marvao, MR ;

Rocha, J .

INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES, 2002, 31 (1-3) :1-8

[10]

Depolymerization and de-N-acetylation of chitin oligomers in hydrochloric acid [J].

Einbu, Aslak ;

Varum, Kjell M. .

BIOMACROMOLECULES, 2007, 8 (01) :309-314

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