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Regenerated cellulose fiber and preparation method thereof

A technology of regenerated cellulose and fiber, applied in the direction of single-component cellulose rayon, fiber chemical characteristics, rayon manufacturing, etc., can solve the problems of shortage of regenerated cellulose fiber raw materials, poor operability, etc., and achieve short dissolution time , Improve the uniformity of reaction and reduce the effect of reaction time

Active Publication Date: 2016-04-27
JINAN SHENGQUAN GROUP SHARE HLDG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] In view of this, the technical problem to be solved by the present invention is to provide a kind of regenerated cellulose fiber and its preparation method. The regenerated cellulose fiber and its preparation method provided by the present invention use corn cobs as cellulose as raw material and are prepared by solvent method Regenerated cellulose fiber effectively solves the problems of shortage of regenerated cellulose fiber raw materials and poor operability in the preparation process

Method used

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  • Regenerated cellulose fiber and preparation method thereof
  • Regenerated cellulose fiber and preparation method thereof
  • Regenerated cellulose fiber and preparation method thereof

Examples

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preparation example Construction

[0032] The invention provides a kind of preparation method of regenerated cellulose fiber, it is characterized in that, comprises the steps:

[0033] 1) After mixing and dissolving the corn cob fiber pulp and the chelating agent in the NMMO solution, the spinning dope is obtained;

[0034] 2) Spinning the spinning dope obtained in the above steps to obtain regenerated cellulose fibers.

[0035] In the present invention, firstly, the corncob fiber pulp and the chelating agent are mixed and dissolved in the NMMO solution to obtain the spinning dope; the degree of polymerization of the corncob fiber pulp is preferably 400-800, more preferably 400-750, and more preferably 400-700, more preferably 400-650, most preferably 400-600. In the corn cob fiber pulp, the cellulose is preferably 80% to 95%, more preferably 83% to 92%, most preferably 85% to 90%; the whiteness is preferably 70% to 90% , more preferably 75%-85%, most preferably 78%-82%; the ash content is preferably 0-0.5%, ...

Embodiment 1

[0075] The corncob fiber pulp and the chelating agent are dissolved with NMMO solution to obtain a spinning stock solution, and the spinning stock solution is used to prepare regenerated cellulose fibers.

[0076] Among them, corncob pulp accounts for 12% of the total material weight. The addition amount of the chelating agent (ethylenediaminetetraacetic acid) is 0.1% of the cellulose pulp.

[0077] see image 3 , image 3 It is a 5000 times SEM photo of the corncob cellulose pulp in Example 1 of the present invention.

Embodiment 2～15

[0079] Embodiment 2-13 is the same as embodiment 1, only limited to the change of corn cob pulp content and the change of chelating agent, the corn cob pulp of embodiment 14 is impregnated with acetic acid before mixing with NMMO, then dried, then added to NMMO solution middle. In Example 15, after the corncob pulp and the NMMO solution were mixed, carbon dioxide gas was passed into the mixed slurry. The carbon dioxide introduced at this time is simultaneously removed in the defoaming step before spinning.

[0080] In Examples 1 to 15, the timing of adding the chelating agent is when the water content of NMMO is 10% to 30%, the properties of the corn cob fiber pulp selected in Examples 1-15 and Comparative Document 1: corn cob fiber pulp The medium cellulose content is 80-95%, the whiteness is 70-90%, the ash content is 0-0.5%, and the water content is 5-50%.

[0081] The preparation method of the corn cob fiber pulp is:

[0082] method one

[0083] (1) After crushing the ...

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Abstract

The invention provides a regenerated cellulose fiber and a preparation method thereof. The preparation method is characterized by comprising the following steps: dissolving corncob fiber pulp and a chelating agent with an NMMO solution so as to obtain a spinning stock solution; and preparing regenerated cellulose fiber from the spinning stock solution obtained in the previous step. According to the invention, the regenerated cellulose fiber is prepared by using a solvent method; corncob fiber is used as a raw material for Lyocell fiber, so the agricultural waste corncob is fully utilized and the problem of shortage of a raw material for the Lyocell fiber is effectively overcome; moreover, the corncob fiber pulp has short fiber length (in a range of 0 to 0.3 mm) and a uniform polymerization degree (in a range of 500 to 600) and can be rapidly and uniformly dispersed in a solvent system; and since a great number of holes are distributed in the surface of the corncob fiber pulp, strong capillarity is obtained, a solvent can be rapidly absorbed and the surface and interior of the pulp both participate in a reaction, and thus, reaction time is greatly reduced and reaction uniformity is improved.

Description

technical field [0001] The invention relates to the technical field of regenerated fibers, in particular to a regenerated cellulose fiber and a preparation method thereof. Background technique [0002] Regenerated cellulose fibers refer to chemical fibers that are made from natural polymers and chemically, and are basically the same in chemical composition as the original polymers. At the same time, cellulose can be used as raw material to make regenerated fibers with the structure of cellulose II. [0003] Among many regenerated cellulose fibers, Lyocell fiber (that is, soluble fiber) is known as the green fiber of the 21st century. It uses N-methylmorpholine-N-oxide (NMMO) as a solvent for wet spinning regenerated cellulose fibers. As early as the 1930s, a patent (US92179181) proposed that tertiary amine acid oxides could be used to directly dissolve cellulose to produce a new type of cellulose fiber-Lyocell fiber with better performance than viscose fiber. Its compositi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F2/00D01F1/00A41D31/00
CPCD01F1/00D01F2/00
Inventor 唐一林张金柱许日鹏王双成孙俊科张小鸽
Owner JINAN SHENGQUAN GROUP SHARE HLDG
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