Synthesis and Characterization of Hydrophobically Modified Xylans
| Autor: | Carlucio Roberto Alves, Atanu Biswas, Sanghoon Kim, Roselayne Ferro Furtado, Huai N. Cheng |
|---|---|
| Přispěvatelé: | SANGHOON KIM, National Center for Agricultural Utilization Research, USDA Agricultural Research Services, CARLUCIO R. ALVES, Chemistry Department, State University of Ceará, ROSELAYNE FERRO FURTADO, CNPAT., ATANU BISWAS, National Center for Agricultural Utilization Research, USDA Agricultural Research Services, HUAI N. CHENG, Southern Regional Research Center, USDA Agricultural Research Service |
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
animal structures
alkyl ketene dimer Polymers and Plastics Dimer Xylan (coating) Ketene Article xylan lcsh:QD241-441 hydrophobic modification Xylan chemistry.chemical_compound octenyl succinic anhydride lcsh:Organic chemistry Modificação hidrofóbica Organic chemistry tetrapropenyl succinic anhydride Alkenyl succinic anhydride Hemicellulose Alkyl Octenyl succinic anhydride chemistry.chemical_classification Dimethyl sulfoxide Succinic anhydride technology industry and agriculture General Chemistry Xilano alkenyl succinic anhydride Anidrido alcenil succínico Solvent carbohydrates (lipids) Anidrido octenil succínico chemistry Anidrido tetrapropenil succínico Alkyl ketene dimer Hydrophobic modification Tetrapropenyl succinic anhydride Dímero de alquil ceteno |
| Zdroj: | Polymers Volume 13 Issue 2 Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA-Alice) Empresa Brasileira de Pesquisa Agropecuária (Embrapa) instacron:EMBRAPA Polymers, Vol 13, Iss 291, p 291 (2021) |
| ISSN: | 2073-4360 |
| Popis: | Xylan is a major type of hemicellulose that has attracted a lot of research and development activities. It is often derivatized in order to improve its properties. In the literature, hydrophobic modification of polymers is often used to produce surfactant-like materials and associative thickeners. In this work, we have derivatized xylan with alkyl ketene dimer (AKD) and two types of alkenyl succinic anhydrides (ASAs). The xylan-AKD derivatives have been made at 90 ° C, using dimethyl sulfoxide as solvent and 4-dimethylaminopyridine as promoter. Samples with degrees of substitution (DS) up to 0.006 have been produced. The xylan-ASA derivatives have been synthesized at 120 ° C in dimethyl sulfoxide with DS up to 0.105&ndash 0.135. The structures of these products have been confirmed with NMR and FT-IR. These xylan derivatives increase the structural diversity of xylan and provide additional options for people seeking to use hydrophobically modified polysaccharides in their applications. |
| Databáze: | OpenAIRE |
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