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Method for utilizing camellia oleifera abel fruit shells to prepare cellulose nano-crystal whiskers

A technology of camellia husk and nano-whisker is applied in the post-processing of cellulose pulp, fiber raw material, fiber raw material processing and other directions, which can solve the problems such as not yet, and achieve strong Young's modulus, high reactivity, and good mechanical properties. Effect

Active Publication Date: 2017-12-01
HUNAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Through reading related literatures and patents at home and abroad, it is found that the main method of preparing nano-cellulose whiskers is to use 60wt% concentrated sulfuric acid to acid hydrolyze wood raw materials, and so far there is no relevant organic weak acid treatment of camellia oleifera husks and fiber preparation. Report on prime nanowhiskers

Method used

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  • Method for utilizing camellia oleifera abel fruit shells to prepare cellulose nano-crystal whiskers
  • Method for utilizing camellia oleifera abel fruit shells to prepare cellulose nano-crystal whiskers
  • Method for utilizing camellia oleifera abel fruit shells to prepare cellulose nano-crystal whiskers

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] S1. Mechanical treatment: take 100g of Camellia oleifera husk, wash it with distilled water, dry it in the sun, and cut it into 1cm pieces;

[0041] S2. Alkali treatment: get the 10g camellia oleifera husk in step S1, add to 50mL of 1(wt)%NaOH and 1(wt)%Na 2 SO 3 In the mixed solution, heat and stir in a water bath at 50°C for 180 minutes to remove lignin and obtain cellulose from camellia oleifera husk;

[0042] S3. Purification: Add 10 g of Camellia oleifera husk cellulose obtained in step S2 into 40 mL of 10 (wt)% NaOH solution, heat and stir in a water bath at 50° C. for 120 minutes, remove hemicellulose, and prepare Camellia oleifera husk fiber white;

[0043] S4. Bleaching: disperse 10 g of camellia husk cellulose obtained in step S3 into 100 mL of distilled water, add 2 mL of 30 wt % H 2 o 2 The solution was heated and stirred in a water bath at 40°C for 120 minutes, then filtered with a G4 sand core funnel, collected, placed in an oven, and dried at 50°C;

[...

Embodiment 2

[0048] S1. Mechanical treatment: take 100g of Camellia oleifera husk, wash it with distilled water, dry it in the sun, and cut it into 1cm pieces;

[0049] S2. Alkali treatment: get 10g Camellia oleifera husk in step S1, add 3(wt)%NaOH and 3(wt)%NaOH to 60mL 2 SO 3 In the mixed solution, heat and stir in a water bath at 60°C for 120 minutes to remove lignin and obtain cellulose from camellia oleifera husk;

[0050] S3. Purification: the Camellia oleifera husk cellulose that 10g step S2 gained is joined in the 14(wt)% NaOH solution of 60mL, 60 ℃ Heating and stirring in a water bath for 90 minutes to remove the hemicellulose and prepare the camellia oleifera husk cellulose;

[0051] S4. Bleaching: disperse 10 g of camellia oleifera cellulose obtained in step S3 into 100 mL of distilled water, add 3 mL of 30 wt % H 2 o 2 The solution was heated and stirred in a water bath at 45°C for 100 minutes, then filtered with a G4 sand core funnel, collected, placed in an oven, and drie...

Embodiment 3

[0056] S1. Mechanical treatment: take 100g of Camellia oleifera husk, wash it with distilled water, dry it in the sun, and cut it into 1cm pieces;

[0057] S2. lye treatment: get 10g camellia oleifera husk in step S1, add 4(wt)%NaOH and 4(wt)%NaOH to 70mL 2 SO 3 In the mixed solution, heat and stir in a water bath at 70°C for 90 minutes to remove lignin and obtain cellulose from camellia oleifera husk;

[0058] S3. Purification: Add 10 g of Camellia oleifera husk cellulose obtained in step S2 into 70 mL of 18 (wt)% NaOH solution, heat and stir in a water bath at 70°C for 80 minutes, remove hemicellulose, and prepare Camellia oleifera husk fiber white;

[0059] S4. Bleaching: disperse 10 g of the camellia husk cellulose obtained in step S3 into 100 mL of distilled water, add 4 mL of 30 wt % H 2 o 2 The solution was heated and stirred in a water bath at 50°C for 80 minutes, then filtered with a G4 sand core funnel, collected, placed in an oven, and dried at 50°C;

[0060] S...

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Abstract

The invention discloses a method for utilizing camellia oleifera abel fruit shells to prepare cellulose nano-crystal whiskers, and belongs to the technical field of energy chemical materials. According to the method, the camellia oleifera abel fruit shells serve as initial raw materials, and firstly, the fruit shells are subjected to sulphite alkali pretreatment, alkali purification and hydrogen peroxide bleaching to obtain camellia oleifera abel fruit shell cellulose; secondly, the camellia oleifera abel fruit shell cellulose is subjected to acidolysis with organic acid namely oxalic acid, and the camellia oleifera abel fruit shells cellulose can be prepared after centrifugation and ultrasonic dispersion. According to the method, the production process is simple and easy to implement, and not only can the comprehensive utilization value of the camellia oleifera abel fruit shells be well improved, but also the prepared cellulose nano-crystal whiskers have the advantage of being good in mechanical performance, biodegradable, easy to compound and the like and can be widely applied to packaging toughening materials, optoelectronics and semiconductor devices and other industrial fields.

Description

technical field [0001] The invention relates to a preparation method of cellulose nano-whiskers, more specifically, a method for preparing cellulose nano-whiskers by using camellia oleifera husk. Background technique [0002] Camellia oleifera (Camellia oleiferaabel) is a unique high-quality woody oil tree species in my country, and it is one of the four woody edible oil tree species that are as famous as olives, oil palms and coconuts. China is the country with the largest cultivation area, the highest output and the most abundant varieties of Camellia oleifera in the world. According to statistics, my country's existing Camellia oleifera forest area is about 45 million mu, and the annual output of tea seeds is about 1 million tons, of which Hunan, Jiangxi and Guangxi account for 76.2% of the total area of ​​the country. The main products of Camellia oleifera seed, camellia oil and tea saponin, have been widely used in food, medicine, daily chemical and other fields, but C...

Claims

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Application Information

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IPC IPC(8): D21B1/06D21C1/06D21C3/04D21C3/26D21C9/16C08B15/02C08B15/08
CPCC08B15/02C08B15/08D21B1/061D21C1/06D21C3/04D21C3/26D21C9/163
Inventor 李知函杨玲刘跃军肖金昭
Owner HUNAN UNIV OF TECH
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