Fluorescent salix mongolica regenerated cellulose fibers and preparation method thereof

A technology of regenerated cellulose and cellulose solution, applied in the field of natural polymers and textiles, to achieve high luminous intensity, broad application prospects, and good water solubility

Active Publication Date: 2015-02-18
WUJIANG JINGMEIFENG IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is no report on adding up-conversion nanopart

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] (1) Preparation of salix wood powder: Peel and crush salix, pass through a 100-mesh sieve, dry at 80°C, cool, and put in a desiccator for later use;

[0032] (2) Preparation of salix fiber: add salix wood powder in step (1) to the autoclave, add anhydrous ethanol-nitric acid mixture, wherein the addition of nitric acid is 3%wt, and the solid-to-liquid ratio is 1:10 , heated to 120°C, stirred for 3 hours, cooled, filtered, washed with absolute ethanol for 5 times, rinsed repeatedly with deionized water, and dried;

[0033] (3) Preparation of salix pulp: use 10%wt NaOH to cook, the bath ratio is 1:10, the cooking temperature is 200°C, the time is 3h, and then 20%wt hydrogen peroxide is used for bleaching, the bleaching temperature is 100°C, and the bleaching time is 2h;

[0034] (4) Add 0.78mmol of Y(CF 3 COO) 3 , 0.2mmol of Yb (CF 3 COO) 3 , 0.02mmol of Er(CF 3 COO) 3 , 10mmol sodium fluoride (NaF) and 20ml organic solvent (10ml oleic acid OA + 10ml carbadecene OD...

Embodiment 2

[0038] (1) Preparation of salix wood powder: Peel and crush salix, pass through a 80-mesh sieve, dry at 90°C, cool, and put in a desiccator for later use;

[0039] (2) Preparation of salix fiber: add the salix wood powder in step (1) to the autoclave, add anhydrous ethanol-sulfuric acid mixture, the sulfuric acid addition is 4%wt, and the solid-to-liquid ratio is 1:5 , after heating to 120°C, stirring for 2 hours, cooling, filtering, washing with absolute ethanol for 3 times, then repeatedly rinsing with deionized water, and drying;

[0040] (3) Preparation of salix pulp: use 5%wt NaOH to cook, the liquor ratio is 1:5, the cooking temperature is 250°C, the time is 4h, and then bleached with 25%wt hydrogen peroxide, the bleaching temperature is 80°C, and the bleaching time is 1h;

[0041] (4) Add 0.69mmol of Y(CF 3 COO) 3 , 0.3mmol of Yb (CF 3 COO) 3 , 0.01mmol of Er(CF 3 COO) 3 , 10mmol sodium fluoride (NaF) and 20ml organic solvent (10ml oleic acid OA + 10ml carbadecen...

Embodiment 3

[0045] (1) Preparation of salix wood powder: Peel and crush salix, pass through a 60-mesh sieve, dry at 80°C, cool, and put in a desiccator for later use;

[0046] (2) Preparation of salix fiber: add salix wood powder in step (1) to the autoclave, add absolute ethanol-hydrochloric acid mixture, the solid-to-liquid ratio is 1:15, heat to 140°C, and stir for 3 hours , cooled, filtered, washed twice with absolute ethanol, rinsed repeatedly with deionized water, and dried;

[0047] (3) Preparation of salix pulp: use 15%wt NaOH to cook, the bath ratio is 1:10, the cooking temperature is 220°C, the time is 3h, and then 20%wt hydrogen peroxide is used for bleaching, the bleaching temperature is 80°C, and the bleaching time is 2h;

[0048] (4) Add 0.78mmol of Y(CF 3 COO) 3 , 0.2mmol of Yb (CF 3 COO) 3 , 0.02mmol of Tm (CF 3 COO) 3 , 10mmol sodium fluoride (NaF) and 20ml organic solvent (10ml oleic acid OA + 10ml carbadecene ODE) were added to a 50mL three-necked flask and heate...

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Abstract

The invention discloses fluorescent salix mongolica regenerated cellulose fibers and a preparation method thereof. The preparation method comprises the following steps: peeling off salix mongolica, crushing, sieving, drying and cooling to prepare salix mongolica wood powder; extracting salix mongolica cellulose by adopting an ethanol-acid mixed solution; treating the salix mongolica cellulose by processes of steaming, bleaching and the like to prepare salix mongolica pulp; filtering, decompressing and de-foaming water-soluble up-conversion nano particles and the salix mongolica cellulose to obtain a spinning solution which is uniformly mixed; and spinning the spinning solution by a condensation bath, drafting and molding, refining and drying to obtain the fluorescent salix mongolica regenerated cellulose fibers. A preparation process of the water-soluble up-conversion nano particles comprises the following steps: firstly, synthesizing hexagonal-phase up-conversion luminous nano particles UCNPs by adopting a high-temperature thermal decomposition method; treating the UCNPs with nitrosonium tetrafluoroborate NOBF4, and replacing oleic acid molecules on the surface; finally, reacting with a hydrophilic hyperbranched polymer to obtain the water-soluble up-conversion nano particles. According to the fluorescent salix mongolica regenerated cellulose fibers, the water-soluble up-conversion nano particles and the salix mongolica regenerated cellulose are used as raw materials and are subjected to efficient blending and wet-process spinning to prepare the regenerated cellulose fibers with the excellent fluorescent performance.

Description

technical field [0001] The invention relates to a fluorescent salix regenerated cellulose fiber and a preparation method thereof, belonging to the fields of natural polymers and textiles. Background technique [0002] Fluorescent fibers can be divided into infrared fluorescent fibers and ultraviolet fluorescent fibers. Infrared fluorescent fiber refers to a fiber that can emit a variety of different colors under the excitation of infrared light. Ultraviolet fluorescent fiber refers to the fiber that shimmers under the excitation of ultraviolet light and can emit various colors. When the ultraviolet light disappears, it can return to the original color of the fiber. Fluorescent fibers are mainly used in anti-counterfeiting. If fluorescent fibers are added to paper, various anti-counterfeiting papers can be made. Under visible light, the fibers in the paper are invisible, but under special light, the fibers will show different colors to play an anti-counterfeiting role. At ...

Claims

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Application Information

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IPC IPC(8): D01F1/10D01F2/00C09K11/06
Inventor 赵兵
Owner WUJIANG JINGMEIFENG IND
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