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Direct Organocataly...
Direct Organocatalytic Thioglycolic Acid Esterification of Cellulose Nanocrystals : A simple entry to click chemistry on the surface of nanocellulose
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- Alimohammadzadeh, Rana (författare)
- Mittuniversitetet,Institutionen för naturvetenskap
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- Abbaszad Rafi, Abdolrahim (författare)
- Mittuniversitetet,Institutionen för naturvetenskap
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- Goclik, Lisa (författare)
- Mittuniversitetet,Institutionen för naturvetenskap
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- Tai, Cheuk-Wai, 1973- (författare)
- Stockholms universitet,Institutionen för material- och miljökemi (MMK)
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- Cordova, Armando, 1970- (författare)
- Mittuniversitetet,Institutionen för naturvetenskap
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(creator_code:org_t)
- Elsevier BV, 2022
- 2022
- Engelska.
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Ingår i: Carbohydrate Polymer Technologies and Applications. - : Elsevier BV. - 2666-8939. ; 3
- Relaterad länk:
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https://doi.org/10.1...
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https://urn.kb.se/re...
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https://doi.org/10.1...
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https://urn.kb.se/re...
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Abstract
Ämnesord
Stäng
- The mild and simple direct organocatalytic esterification of cellulose nanocrystals (CNC) and nanocellulose-based materials (e.g. foams and films) with thioglycolic acid (TGA) is disclosed. The transformation gives the corresponding thiol group (-SH) functionalized crystalline nanocellulose (CNC-SH) using simple, naturally occurring, and non-toxic organic acids (e.g. tartaric acid) as catalysts. We also discovered that the direct esterification of cellulose with TGA is autocatalytic (i.e. the TGA is catalyzing its own esterification). The introduction of the -SH functionality at the nanocellulose surface opens up for further selective applications. This was demonstrated by attaching organic catalysts and fluorescent molecules, which are useful as sensors, to the CNC-SH surface by thiol-ene click chemistry. Another application is to use the CNC-SH-based foam as a heterogeneous biomimetic reducing agent, which is stable during multiple recycles, for the copper-catalyzed alkyne-azide 1,3-dipolar cycloaddition (“click” reaction).
Ämnesord
- TEKNIK OCH TEKNOLOGIER -- Industriell bioteknik -- Biomaterial (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Industrial Biotechnology -- Bio Materials (hsv//eng)
- NATURVETENSKAP -- Kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences (hsv//eng)
Nyckelord
- Cellulose nanocrystals
- Thiol-functionalized nanocellulose
- Organocatalysis
- Heterogeneous catalysis
- Direct esterification
- Click chemistry
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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