Preparation method of fir nano fiber

A technology of nanofiber and Chinese fir, which is applied in fiber raw materials, fiber raw material treatment, cellulose pulp post-treatment, etc. It can solve the problems of low catalytic activity of Chinese fir pulp, difficulty in obtaining and meeting requirements, low production efficiency, etc., and achieve excellent catalytic performance. Activity, high production efficiency, and excellent product performance

Active Publication Date: 2017-03-08
TIANJIN ZHONGZHI TECH DEV CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The generation of cellulose nanofibers is one of the new ways to utilize Chinese fir, but in the prior art, TEMPO is used to catalyze and oxidize the pulp to prepare wood nanofibers, but the commonly used preparation process and TEMPO catalytic materials are not effective for the catalytic oxidation of Chinese fir pulp. The activity is low and it is not easy to obtain nanofibers that meet the requirements, the production efficiency is low, and the waste of raw materials is serious

Method used

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Embodiment 1

[0030] Embodiment 1 of the present invention provides a kind of preparation method of Chinese fir nanofiber, comprises the following steps carried out in sequence:

[0031] S1. Add the Chinese fir fiber raw material to the cooking equipment, add 12-18% of the cooking liquid by weight of the Chinese fir fiber raw material, first pre-cook at 80-95°C for 30-45min, then heat up to 130-160°C for 2-2.5 hours , then lower the temperature to 60°C, spray 1,2-dibromoethane ethanol solution into the cooking equipment, stir for 1 hour, remove the residual liquid, and finally obtain the cooking slurry; wherein, the cooking liquid contains the following components in weight percentage : Emodin 2-3%, NaOH 1-1.5%, tetrabutylammonium bromide 0.3-0.6%, hydroxymethyl cellulose 1-2%, o-benzoylsulfonimide 0.05-0.2%, potassium citrate 1 to 3%, 1.5 to 2% methacrylic acid; the volume ratio of 1,2-dibromoethane to ethanol in the 1,2-dibromoethane ethanol solution is 1:10, and the spraying amount is th...

Embodiment 2

[0044] Embodiment 2 of the present invention provides a kind of preparation method of Chinese fir nanofiber, comprises the following steps carried out in sequence:

[0045] S1. Add the Chinese fir fiber raw material to the cooking equipment, add 12-18% of the cooking liquid by weight of the Chinese fir fiber raw material, first pre-cook at 80-95°C for 30-45min, then heat up to 130-160°C for 2-2.5 hours , then lower the temperature to 60°C, spray 1,2-dibromoethane ethanol solution into the cooking equipment, stir for 1 hour, remove the residual liquid, and finally obtain the cooking slurry; wherein, the cooking liquid contains the following components in weight percentage : Emodin 2-3%, NaOH 1-1.5%, tetrabutylammonium bromide 0.3-0.6%, hydroxymethyl cellulose 1-2%, o-benzoylsulfonimide 0.05-0.2%, potassium citrate 1 to 3%, 1.5 to 2% methacrylic acid; the volume ratio of 1,2-dibromoethane to ethanol in the 1,2-dibromoethane ethanol solution is 1:10, and the spraying amount is th...

Embodiment 3

[0060] Embodiment 3 of the present invention provides a kind of preparation method of Chinese fir nanofiber, comprises the following steps carried out in sequence:

[0061] S1. Add the Chinese fir fiber raw material to the cooking equipment, add 12-18% of the cooking liquid by weight of the Chinese fir fiber raw material, first pre-cook at 80-95°C for 30-45min, then heat up to 130-160°C for 2-2.5 hours , then lower the temperature to 60°C, spray 1,2-dibromoethane ethanol solution into the cooking equipment, stir for 1 hour, remove the residual liquid, and finally obtain the cooking slurry; wherein, the cooking liquid contains the following components in weight percentage : Emodin 2-3%, NaOH 1-1.5%, tetrabutylammonium bromide 0.3-0.6%, hydroxymethyl cellulose 1-2%, o-benzoylsulfonimide 0.05-0.2%, potassium citrate 1 to 3%, 1.5 to 2% methacrylic acid; the volume ratio of 1,2-dibromoethane to ethanol in the 1,2-dibromoethane ethanol solution is 1:10, and the spraying amount is th...

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Abstract

The invention provides a preparation method of a fir nano fiber. The preparation method comprises the following steps: 1, boiling fir fibers in a boiling liquid to prepare paper pulp; 2, extracting the fir fibers, 3, preparing sodium chlorite solution, adding polyethylene friction blocks into the sodium chlorite solution, treating the fir fibers by the sodium chlorite solution; 4, treating the fir fibers with alkali solution to obtain purified cellulose; 5, preparing iron-ruthenium composite nano-particles; 6, preparing the iron-ruthenium composite nano-particles; 6, subjecting the purified cellulose to catalytic oxidation in the catalytic system comprising TEMPO, the composite nano-particles, sodium bromide and sodium hypochlorite; 7, carrying out a microwave heating reaction on the obtained cellulose suspension liquid under the condition of alternating magnetic field, subjecting the reaction product to washing and drying in vacuum to obtain the absolute dry oxidized cellulose fiber; 8 freeze-drying the suspension liquid to obtain a final product. The method disclosed by the invention is specially used for preparing the fir nano fibers, and the prepared fir nano fibers are very uniformly dispersed, and the nano fibers are low in mutual aggregation degree, high in production efficiency and good in product performance.

Description

technical field [0001] The invention relates to the technical field of wood fiber preparation, in particular to a method for preparing fir nanofibers. Background technique [0002] Nanocellulose is a nano-material with a diameter of 1-100nm and a granular, rod-like or filamentary structure isolated from natural fibers. Due to its advantages of regeneration, low density, high strength, high elastic modulus, high specific surface area, low cost, biodegradability, and nanoscale fine scale, it is widely used in reinforced polymer nanocomposites, flexible display substrate materials, artificial There is a large potential application space in the field of advanced functional materials such as skin, artificial blood vessels, and biosensors. [0003] Carbon fiber with a wide range of applications has high axial strength and modulus, low density, high specific performance, no creep, ultra-high temperature resistance in non-oxidizing environments, good fatigue resistance, specific he...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21B1/30D21C7/00D21C9/02D21C9/18C08B15/02
CPCC08B15/02D21B1/306D21C7/00D21C9/02D21C9/185
Inventor 崔建中
Owner TIANJIN ZHONGZHI TECH DEV CO LTD
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