NDLI: Microwave-assisted synthesis of carboxymethylcellulose

Content Provider	Springer Nature Link
Author	Tomavá, Vladimíra Pielichowski, Krysztof Sroková, Iva Žoldaková, Alena Sasinková, Vlasta Ebringerová, Anna
Copyright Year	2007
Abstract	Carboxymethylcellulose (CMC, DSCM = 1) was partially hydrophobized in order to prepare polymeric surfactants by the transesterification reaction using the methyl ester of the fatty acid complex of rapeseed oil (MERO). The chemical modification was performed in different reaction media (i) DMF/TSA and (ii) H2O/DMF with and without K2CO3 as catalyst, at various reaction conditions and using microwave radiation with controlled power as heating source. The obtained MERO-hydrophobized CMC (MH-CMC) comprising mixed fatty acyl esters were characterized by FT-IR and NMR spectroscopic techniques, which indicated a very low degree of esterification (DS < 0.1). The derivatives showed, in spite of moderate surface tension-lowering effects, excellent emulsifying activity for ‘oil in water’ type emulsions as well as good performance properties including washing power and antiredeposition efficiency. The results suggested that surface-active MH-CMC derivatives can be prepared under microwave heating at reaction times in the range of several minutes, what is a great advantage in comparison to transesterification reactions lasting up to 6 h at conventional heating. The novel CMC esters represent biodegradable polymeric surfactants with potential applications in manufacture of consumer products and in industrial processes.
Starting Page	15
Ending Page	25
Page Count	11
File Format	PDF
ISSN	01700839
Journal	Polymer Bulletin
Volume Number	60
Issue Number	1
e-ISSN	14362449
Language	English
Publisher	Springer-Verlag
Publisher Date	2007-09-20
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Carboxymethylcellulose transesterification microwave irradiation biopolymers polymeric surfactants rapeseed oil methyl esters Polymer Sciences Characterization and Evaluation of Materials Soft Matter, Complex Fluids Physical Chemistry
Content Type	Text
Resource Type	Article
Subject	Chemistry Materials Chemistry Condensed Matter Physics Polymers and Plastics

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