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Preparation method of degradable bamboo fiber straw

A bamboo fiber and straw technology is applied in the field of preparation of degradable bamboo fiber straws, which can solve the problems of low utilization rate of bamboo materials, hollow sharpness, different diameters of bamboo materials, etc. The effect of reducing the hygroscopic properties

Active Publication Date: 2021-06-15
ZHEJIANG FORESTRY ACAD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the diameter of bamboo is different, hollow and has a certain degree of sharpness, which leads to a low utilization rate of bamboo. During the process of using and processing, a large amount of processing residues such as bamboo scraps are produced

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The preparation method of the degradable bamboo fiber straw of the present embodiment, the method is:

[0023] S1. Bamboo scrap fiber pretreatment: Bamboo scrap is first screened, bamboo fiber with a length less than 10mm is selected, mixed with water at a mass ratio of 1:1, steam blasted, rinsed with water, and heated at a temperature of 50°C After drying for 10 hours under the condition of 10 h, the pretreated bamboo fiber with a water content of ≤ 10% was obtained; the steam explosion treatment method is: after the temperature is 180 ° C and the steam pressure is 1.8 MPa, the pressure is maintained for 45 seconds, and the bamboo fiber is released instantly. After pressure to normal pressure, naturally cool to room temperature; The massfraction of hemicellulose in the described pretreated bamboo fiber is 20%, and the massfraction of lignin in the described pretreated bamboo fiber is 23%;

[0024] The pretreated bamboo fiber obtained by steam explosion of bamboo fiber ...

Embodiment 2

[0030] The preparation method of the degradable bamboo fiber straw of the present embodiment, the method is:

[0031] S1. Bamboo scrap fiber pretreatment: Bamboo scrap is first screened, bamboo fiber with a length less than 10mm is selected, mixed with water at a mass ratio of 1:2, steam blasted, rinsed with water, and heated at a temperature of 65°C. After drying under the condition of 7h, the pretreated bamboo fiber with water content≤10% is obtained; the method of steam explosion treatment is: after the temperature is 200°C and the steam pressure is 1.5MPa, the pressure is kept for 60s, and then the bamboo fiber is released instantly. After pressure is to normal pressure, naturally cool to room temperature; The massfraction of hemicellulose in the described pretreatment bamboo fiber is 15%, and the massfraction of lignin in the described pretreatment bamboo fiber is 25%;

[0032]S2. Preparation of bamboo fiber reinforced degradable modified plastic particles: preheat the de...

Embodiment 3

[0036] The preparation method of the degradable bamboo fiber straw of the present embodiment, the method is:

[0037] S1. Bamboo scrap fiber pretreatment: Bamboo scrap is first screened, bamboo fiber with a length less than 10mm is selected, mixed with water at a mass ratio of 1:1.5, steam blasted, rinsed with water, and heated at a temperature of 60°C After drying for 8 hours under the condition of 2 MPa, the pretreated bamboo fiber with water content≤10% is obtained; the method of steam explosion treatment is: after holding the pressure for 35s under the condition that the temperature is 210°C and the steam pressure is 2MPa, the pressure is released instantly After to normal pressure, naturally cool to room temperature; The massfraction of hemicellulose in the described pretreatment bamboo fiber is 18%, and the massfraction of lignin in the described pretreatment bamboo fiber is 26%;

[0038] S2. Preparation of bamboo fiber-reinforced degradable modified plastic particles: p...

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Abstract

The invention provides a preparation method of a degradable bamboo fiber straw, and the method comprises the following steps: primarily screening crushed bamboo, selecting bamboo fibers, mixing with water, performing steam explosion treatment, washing with water, and performing drying to obtain pretreated bamboo fibers; preheating and cooling degradable plastic, adding the pretreated bamboo fiber, polyvinyl alcohol, azodicarbonamide, filler, nano-silver and sodium bicarbonate, performing mixing, and performing granulating to obtain bamboo fiber reinforced degradable modified plastic particles; the bamboo fiber reinforced degradable modified plastic particles are continuously injected into an annular mold for directional heating in a microcellular foaming extrusion molding mode, and the degradable bamboo fiber suction pipe is obtained. According to the invention, hemicelluloses and part of lignin in bamboo fibers can be effectively degraded, the moisture absorption performance of the bamboo fibers is reduced, large pores exist among the fibers in the foaming process of the bamboo fiber reinforced degradable modified plastic particles, so that water escapes to the outer layer, a compact layer is formed on the inner wall of the bamboo fiber straw, and the stability of the internal structure of the straw is ensured.

Description

technical field [0001] The invention belongs to the technical field of bamboo processing, and in particular relates to a preparation method of a degradable bamboo fiber straw. Background technique [0002] With the gradual deepening of plastic pollution control, the use of disposable plastic bags, disposable plastic tableware, express plastic packaging, disposable plastic straws and other products made of non-degradable plastics has been restricted. Polylactic acid (PLA), polyhydroxyalkanoate (PHA), dibasic acid diol copolyester series (PBS, PBAT, PBSA), polyglycolic acid (PGA), polycaprolactone (PCL), etc. can be biologically The demand for degradable plastics has surged, but compared with traditional plastics, biodegradable plastics still have a large gap in heat resistance, toughness, high-strength mechanical properties, and high wear-resistant processability, which limits the application fields. [0003] Bamboo is an important forest resource in my country. It has the a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J9/08C08J9/10C08L97/02C08L3/02C08L29/04C08L67/04C08K3/08A47G21/18
CPCC08J9/103C08J9/08C08J9/0061C08J9/0066A47G21/18C08J2203/04C08J2203/02C08J2429/04C08J2397/02C08J2467/04
Inventor 张文福张建王洪艳袁少飞施江靖
Owner ZHEJIANG FORESTRY ACAD
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