Ebringerová, Anna

Jakubíková, Zuzana

Sasinková, Vlasta

Sroková, Iva

English

DSpace at VSB Technical University of Ostrava

Sb 'k vd ký h 'V k' vk I b'v k' T h • k\J I 1J I- I '!Jorm ve ec c prac1 yso es o y ans e - ec mc e fflhverz1ty strava číslo I, rok 2008, ročník LI, řada hutnická článek č. 1398 POLYSACCHARIDE SURFACTANTS: PREPARATION, SYNTHÉSIS, CHARAKTERIZA TION AND PROPERTIES Z. JAKUBÍKOVÁ 1, I. SROKOVÁ 1, V. SASíNKOVÁ 2, A. EBRíNGEROVÁ2 1 Fac11lty of l11d11stria/ Tec/1110/ogies T/IU of A. Dubček, I. Krasku 491/30, 020 01 Púchov, Slovak Rep11blic,jakubikova@fpt.t11u11i.sk 2 Center of Excellence of the Slova k Academy of Scie11ces, Institute of Chemistry, Dúbravsklí cesta 9,845 38 Bratislava, S/ovak Republic ABSTRACT: This contribution deals with partial hydrophobization of O-(carboxymethyl)starch (CMS, DS = 0.3) with alkylamine (C6,C 10,C 12). The reaction was performed in methanol or dimethylsulfoxide (MeOH, DMSO) and ,4-DMAP as catalyst at laboratory temperature and compared to the reaction performed by the assistance of microwave energy. Various reaction conditions were studied in order to optimize the preparation of water-soluble CMS alkylamides. The obtained derivatives were characterized by FT-IR spectroscopy and the surface­active properties were determined by surface tension and emulsifying efficiency. The biosurfactant performance of the prepared alkylamides of CMS were tested by washing power apd antiredeposition efficiency. KEY WORDS: CMS, amidation, hydrophobization, surface active - properties I. INTRODUCTIONln recent years, considerable attention has been devoted to the preparation ofbiosurfanctants from cbmmercial and non-commercial polysaccharides. Water-soluble derivates of polysaccharides can exhibit properties of biodegradable polymeric surfactants after appropriate chemical modification (1,2]. Starch is renewable, biodegradable, low-cost biopolymer and therefore represents an idea! raw material for production of biosurfactants. The recently reported hydrophobic modification methods used on starch are mainly based on physical treatments (3] and esterification reactions [4] Partially hydrophobized CMS derivatives represent important biodegradable biosurfactants (5, 6]. An interesting alternative of the conventional hydrophobization methods, based O,!l the esterification of carbohydrates with acid halides, anhydrides or by transesterification, represents the amidation of CMS with alkyl amines. Recently, a performing metod of amidation of carboxymethylcellulose [7] and dextran [8) has been reported. CMS is the most important ionic starch ether commercially produced in large quantities. The degree of substitutioon of the carboxymethyl groups of the commercial products was ranges from 0.1 to 0.4 and products are partially soluble in water. 2. EXPERIMENT AL2.1 Materials and analytical methods O-(carboxymethyl) starch with DS.=0.3 and DS=0.1, methanol, dimethylsulfoxide(DMSO), dodecylamine was from FLUKA AG. RUCHS SG, Switzerland, hexylamine and decylamine was 225 

Polysaccharide surfactants : preparation, synthesis, characterization and properties

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Polysaccharide surfactants : preparation, synthesis, characterization and properties

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