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Thermoreversible ge...
Thermoreversible gels of hydrophobically modified hydroxyethyl cellulose cross-linked by amylose
- Article/chapterEnglish2002
Publisher, publication year, extent ...
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2002-04-05
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American Chemical Society (ACS),2002
Numbers
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LIBRIS-ID:oai:lup.lub.lu.se:c60eb2f2-a6f5-4fa2-8faa-1af3f5942684
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https://lup.lub.lu.se/record/338534URI
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https://doi.org/10.1021/ma011980qDOI
Supplementary language notes
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Language:English
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Summary in:English
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Subject category:art swepub-publicationtype
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Subject category:ref swepub-contenttype
Notes
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Aqueous mixtures of hydrophobically modified hydroxyethyl cellulose (HMHEC) or unmodified hydroxyethyl cellulose (HEC), with amylose (AM) or potato amylopectin (PAP), have been investigated by rheology, turbidity, and H-1 NMR measurements. It is concluded that the AM molecules cross-link HMHEC chains by forming helical inclusion complexes with the hydrophobic side chains of HMHEC, leading to thermoreversible, elastic, and thixotropic gels at ambient temperatures. The complexation ability, the setting-melting temperature of the AM-HMHEC complexes, the strength of the association, and the viscoelastic behavior of the gels vary with the polymer concentrations, the pH, and the preparation method. AM-HMHEC complexes were obtained at a pH range of 7-12.5, but a maximum storage modulus was observed at pH approximate to 10. The AM-HMHEC complexation is modified or completely abolished by the addition of surfactant. A weak synergistic interaction was found for mixtures of PAP with HNIHEC. No complexation was observed between HEC and either AM or PAP.
Subject headings and genre
Added entries (persons, corporate bodies, meetings, titles ...)
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Egermayer, MonicaLund University,Lunds universitet,Kemiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,Department of Chemistry,Departments at LTH,Faculty of Engineering, LTH(Swepub:lu)fk1-meg
(author)
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Piculell, LennartLund University,Lunds universitet,Fysikalisk kemi,Enheten för fysikalisk och teoretisk kemi,Kemiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,Physical Chemistry,Physical and theoretical chemistry,Department of Chemistry,Departments at LTH,Faculty of Engineering, LTH(Swepub:lu)fk1-lpi
(author)
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Kemiska institutionenInstitutioner vid LTH
(creator_code:org_t)
Related titles
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In:Macromolecules: American Chemical Society (ACS)35:10, s. 4113-41220024-92971520-5835
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