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Preparation method of epichlorohydrin crosslinked sodium alginate fiber

A technology of epichlorohydrin and sodium alginate, which is applied in the field of materials, can solve problems such as low strength and difficulties in industrialized fiber production, and achieve the effects of uniform force, good strength performance, and simple operation

Inactive Publication Date: 2017-03-22
SHAANXI YIPINDA PETROCHEM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the alginate fibers produced at home and abroad are relatively hard and brittle, with low strength, which makes the industrial production of fibers more difficult.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] The preparation method of epichlorohydrin crosslinked sodium alginate fiber comprises the following steps:

[0018] (1) Preparation of modified sodium alginate: Add 3 g of sodium alginate to 80 g of deionized water, stir for 3 h at a water bath temperature of 50 °C, add 4 g of epichlorohydrin, and stir for 0.5 h. Stand still for 30min to obtain modified sodium alginate solution;

[0019] (2) Preparation of modified sodium alginate fiber: the draft ratio of the spinning head is set to 1:1, and the draft ratio of the winding is set to

[0020] Under the condition of 1:1.25, the modified sodium alginate solution was passed through containing 4% CaCl 2 coagulation bath to obtain uncrosslinked modified sodium alginate fibers;

[0021] (3) Put the uncrosslinked modified sodium alginate fiber in an oven at 100°C for 3 hours of crosslinking reaction, then soak the dried fiber in 0.4% NaCl aqueous solution for 30 minutes, and dry it in vacuum. Obtain modified sodium alginate ...

Embodiment 2

[0023] The preparation method of epichlorohydrin crosslinked sodium alginate fiber comprises the following steps:

[0024] (1) Preparation of modified sodium alginate: add 5 g of sodium alginate to 130 g of deionized water, stir for 3 h at a water bath temperature of 50 °C, add 4 g of epichlorohydrin, and stir for 0.5 h , standing for 30min to obtain a modified sodium alginate solution;

[0025] (2) Preparation of modified sodium alginate fiber: the draft ratio of the spinning head is set to 1:1, and the draft ratio of the winding is set to

[0026] Under the condition of 1:1.25, the modified sodium alginate solution was passed through containing 4% CaCl 2 coagulation bath to obtain uncrosslinked modified sodium alginate fibers;

[0027] (3) Put the uncrosslinked modified sodium alginate fiber in an oven at 100°C for 3 hours of crosslinking reaction, then soak the dried fiber in 0.4% NaCl aqueous solution for 30 minutes, and dry it in vacuum. Obtain modified sodium alginate...

Embodiment 3

[0029] The preparation method of epichlorohydrin crosslinked sodium alginate fiber comprises the following steps:

[0030] (1) Preparation of modified sodium alginate: add 4 g of sodium alginate to 100 g of deionized water, stir for 3 h at a water bath temperature of 50 ° C, and the stirring speed is 150 rpm, add 4 g of epichlorohydrin, Stir the reaction for 0.5 h, the stirring speed is 150 rpm, and let stand for 30 min to obtain the modified sodium alginate solution;

[0031] (2) Preparation of modified sodium alginate fiber: the draft ratio of the spinning head is set to 1:1, and the draft ratio of the winding is set to

[0032] Under the condition of 1:1.25, the modified sodium alginate solution was passed through containing 4% CaCl 2 coagulation bath to obtain uncrosslinked modified sodium alginate fibers;

[0033] (3) Put the uncrosslinked modified sodium alginate fiber in an oven at 100°C for 3 hours of crosslinking reaction, then soak the dried fiber in 0.4% NaCl aque...

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Abstract

The invention discloses a preparation method of epichlorohydrin crosslinked sodium alginate fiber. The preparation method comprises the following steps: (1) modifying sodium alginate with epichlorohydrin to obtain a modified sodium alginate solution; (2) treating the modified sodium alginate solution with a coagulating bath containing 4% of CaCl2 to obtain non-crosslinked modified sodium alginate fiber; and (3) putting the non-crosslinked modified sodium alginate fiber into a dryer at 100 DEG C, and performing a crosslinking reaction for 3h; soaking the dried fiber in 0.4% of NaCl aqueous solution by mass for 30min; and performing vacuum drying to obtain modified sodium alginate fiber. The preparation method disclosed by the invention is easy to operate; the sodium alginate is modified by epichlorohydrin before wet spinning; and the prepared sodium alginate fiber has the advantages of uniform cross-section stress and high strength.

Description

technical field [0001] The invention belongs to the field of materials, and in particular relates to a preparation method of epichlorohydrin crosslinked sodium alginate fibers. Background technique [0002] Sodium alginate is a natural biological material extracted from brown algae, which is widely available and readily available. The two basic units of α-L-guluronic acid (G region) and β-D-mannuronic acid (M region) in the macromolecule are distributed in the molecular chain in an irregular order. Among them, the G unit can interact with calcium ions (Ca 2+ ) combined to form a special "egg-box" structure, which is a commonly used crosslinking agent for sodium alginate spinning. At present, the alginate fibers produced at home and abroad are relatively hard and brittle, with low strength, which makes the industrial production of fibers more difficult. [0003] Therefore, it is of great significance to modify sodium alginate to prepare sodium alginate fibers with excellen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F9/04D01F11/00C08B37/04D01D5/06D01D5/12
CPCD01F9/04C08B37/0084D01D5/06D01D5/12D01F11/00
Inventor 李长英
Owner SHAANXI YIPINDA PETROCHEM CO LTD