Your browser doesn't support javascript.
loading
Inverse solubility of chitin/chitosan in aqueous alkali solvents at low temperature.
Ru, Geying; Wu, Shuaishuai; Yan, Xiaoshuang; Liu, Biaolan; Gong, Pei; Wang, Liying; Feng, Jiwen.
Afiliación
  • Ru G; National Center for Magnetic Resonance in Wuhan, State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, Chinese Academy of Science, Wuhan 430071, People's Republic of China.
  • Wu S; National Center for Magnetic Resonance in Wuhan, State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, Chinese Academy of Science, Wuhan 430071, People's Republic of China; University of Chinese Academy of Sciences, Beijing 100049, P
  • Yan X; National Center for Magnetic Resonance in Wuhan, State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, Chinese Academy of Science, Wuhan 430071, People's Republic of China; University of Chinese Academy of Sciences, Beijing 100049, P
  • Liu B; National Center for Magnetic Resonance in Wuhan, State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, Chinese Academy of Science, Wuhan 430071, People's Republic of China.
  • Gong P; National Center for Magnetic Resonance in Wuhan, State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, Chinese Academy of Science, Wuhan 430071, People's Republic of China; University of Chinese Academy of Sciences, Beijing 100049, P
  • Wang L; National Center for Magnetic Resonance in Wuhan, State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, Chinese Academy of Science, Wuhan 430071, People's Republic of China.
  • Feng J; National Center for Magnetic Resonance in Wuhan, State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, Chinese Academy of Science, Wuhan 430071, People's Republic of China. Electronic address: jwfeng@wipm.ac.cn.
Carbohydr Polym ; 206: 487-492, 2019 Feb 15.
Article en En | MEDLINE | ID: mdl-30553349
The low-temperature dissolving mechanism of chitin/chitosan in the alkali (LiOH, NaOH and KOH) aqueous solvents has not been well established yet. As revealed by our XRD and NMR methods, the prepared deacetylated chitins can be categorized as chitin (DA = 0.94-0.74), chitosan I (DA = 0.53-0.25) and chitosan II (DA < 0.25). Aqueous alkali exhibits fully different dissolving power in the above three regions, i.e., KOH > NaOH >> LiOH for chitin, KOH ≈ LiOH ≈ NaOH for chitosan I, and inverse LiOH >> KOH > NaOH for chitosan II. While in the two-alkali mixed solvent, NaOH or KOH can destroy the interaction of LiOH with D9 (chitosan II region) in the order of NaOH >> KOH, but LiOH cannot destroy the interaction of KOH with raw chitin. The varied solubility of chitin/chitosan in alkali solvent is suggested to be from the cation's preferential interaction rather than OH- ion and low temperature.
Palabras clave
Texto completo
Añadir a Mi BVS
Imprimir
XML
PubMed Links
Buscar en Google

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Carbohydr Polym Año: 2019 Tipo del documento: Article Pais de publicación: Reino Unido
Texto completo
Añadir a Mi BVS
Imprimir
XML
PubMed Links
Buscar en Google

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Carbohydr Polym Año: 2019 Tipo del documento: Article Pais de publicación: Reino Unido