Preparation and properties of chemical cellulose from ascidian tunic and their regenerated cellulose fibers

Autor:	Sang-Hoon You, Young-Seok Koo, Young-Soo Wang, Han-Do Kim
Rok vydání:	2002
Předmět:	Aqueous solution Polymers and Plastics Regenerated cellulose General Chemistry Surfaces Coatings and Films Solvent chemistry.chemical_compound Cellulose fiber chemistry Materials Chemistry Acetone Organic chemistry Fiber Cellulose Dissolving pulp Nuclear chemistry
Zdroj:	Journal of Applied Polymer Science. 85:1634-1643
ISSN:	1097-4628 0021-8995
Popis:	Chemical cellulose (dissolving pulp) was prepared from ascidian tunic by modified paper-pulp process (prehydrolysis with acidic aqueous solution of H2SO4, digestion with alkali aqueous solution of NaOH/Na2S, bleaching with aqueous NaOCl solution, and washing with acetone/water). The α- cellulose content and the degree of polymerization (DPw) of the chemical cellulose was about 98 wt % and 918, respectively. The Japanese Industrial Standard (JIS) whiteness of the chemical cellulose was about 98%. From the X-ray diffraction patterns and 13C-NMR spectrum, it was found that the chemical cellulose obtained here has cellulose Iβ crystal structure. A new regenerated cellulose fiber was prepared from the chemical cellulose by dry–wet spinning using N-methylmorpholine- N-oxide (NMMO)/water (87/13 wt %) as solvent. The new regenerated cellulose fiber prepared in this study has a higher ratio of wet-to-dry strength (
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::fffe11eb50c98cdfab3722e263fc6133 https://doi.org/10.1002/app.10711 Zobrazit plný text záznamu Plný text