Title:
ALGINIC ACID FIBER WITH HIGH DEGREE OF ORIENTATION AND PREPARATION METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2022/252956
Kind Code:
A1
Abstract:
An alginic acid fiber with a high degree of orientation and a preparation method therefor, belonging to the technical field of polymer materials. The method comprises: using sodium alginate having a molecular weight of 400-10000 Daltons and a polyvinyl alcohol having an alcoholysis degree of 70-100 and a polymerization degree of 500-4000 as raw materials, dissolving same to obtain a spinning raw solution, subjecting same to defoaming by means of standing, and spinning same, followed by treatments in a first coagulation bath and a second coagulation bath, then drawing same, and removing the polyvinyl alcohol by means of washing with water to finally obtain the alginic acid fiber with a high degree of orientation. By means of the preparation method, the molecular weight of sodium alginate and the alcoholysis degree and polymerization degree of the polyvinyl alcohol are rationally selected; an alginic acid/polyvinyl alcohol composite fiber with a high degree of orientation is obtained by means of optimizing spinning and drawing conditions; the nature that intermolecular or intramolecular hydrogen bonds hinder the super-drawing of the fiber and eventually affect the fiber strength is disclosed; and by means of changing the conditions, the purposes of weakening hydrogen bonds, improving the draw ratio of the fiber and eventually improving the fiber strength are achieved.
Inventors:
SHI LIUXIN (CN)
SUN HAIYAN (CN)
SUN HAIYAN (CN)
Application Number:
PCT/CN2022/092532
Publication Date:
December 08, 2022
Filing Date:
May 12, 2022
Export Citation:
Assignee:
UNIV NANJING FORESTRY (CN)
International Classes:
D01F8/18; D01D1/02; D01D5/06; D01D5/12; D01F8/10
Domestic Patent References:
| WO2017062429A1 | 2017-04-13 |
Foreign References:
| CN1986920A | 2007-06-27 | |||
| CN113463222A | 2021-10-01 | |||
| CN106149099A | 2016-11-23 | |||
| CN101509152A | 2009-08-19 | |||
| EP0327696A2 | 1989-08-16 |
Other References:
LI XIAO: "Preparation and Properties Research for Blended Products of Sodium Alginate and Water-Soluble Polymers", MASTER THESIS, TIANJIN POLYTECHNIC UNIVERSITY, CN, no. 11, 15 January 2019 (2019-01-15), CN , XP093010398, ISSN: 1674-0246
Attorney, Agent or Firm:
NANJING ZHIZHUAN HUIYI INTELLECTUAL PROPERTY AGENCY CO., LTD (CN)
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