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A method for preparing nanofibril cellulose with high aspect ratio by using camellia oleifera husk

A technology of camellia husk and nanofibrils, which is applied in the directions of pulping with inorganic alkali, fiber raw material treatment, and finely split raw material pretreatment, etc., can solve the problems that there are no reports on the development and utilization of camellia husk nanofibrils, etc. Achieve the effects of good mechanical properties, strong Young's modulus, and stable molecular bonding

Active Publication Date: 2019-01-29
HUNAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Through reading relevant literature and patents at home and abroad, it is found that so far there has been no report on the development and utilization of camellia oleifera husk nanofibril fibers, which is still a brand new subject

Method used

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  • A method for preparing nanofibril cellulose with high aspect ratio by using camellia oleifera husk
  • A method for preparing nanofibril cellulose with high aspect ratio by using camellia oleifera husk
  • A method for preparing nanofibril cellulose with high aspect ratio by using camellia oleifera husk

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] S1. Mechanical treatment: take 100g of Camellia oleifera husk, wash it with distilled water, dry it in the sun, and cut it into 1-3cm pieces;

[0042] S2. Alkali treatment: Add 10g of small pieces of waste camellia oil husk to 50mL of 2(wt)%NaOH and 2(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;

[0043] S3. NaOH purification: add 10 g of Camellia oleifera husk cellulose obtained in step S2 into 40 mL of 10 wt% sodium hydroxide solution, heat and stir in a water bath at 50°C for 120 minutes, remove hemicellulose, and prepare Camellia oleifera husk fiber white;

[0044] S4.H 2 o 2 Bleaching: Disperse 5 g of Camellia oleifera cellulose obtained in step S3 into 100 mL of distilled water, add 1 mL of 30 wt% H 2 o 2 The solution was heated and stirred in a water bath at 40°C for 120 minutes, filtered through a G4 sand core funnel, collected, placed in an ove...

Embodiment 2

[0049] S1. Mechanical treatment: take 100g of Camellia oleifera husk, wash it with distilled water, dry it in the sun, and cut it into 1-3cm pieces;

[0050] S2. Alkali treatment: Add 10g of small pieces of waste camellia oil husk to 60mL of 3(wt)%NaOH and 3(wt)%Na 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;

[0051] S3. NaOH purification: add 10 g of Camellia oleifera husk cellulose obtained in step S2 into 60 mL of 14wt% sodium hydroxide solution, heat and stir in a water bath at 60°C for 90 minutes to remove hemicellulose, and prepare Camellia oleifera husk fiber white;

[0052] S4.H 2 o 2 Bleaching: disperse 5 g of Camellia oleifera 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 45°C for 100 minutes, filtered through a G4 sand core funnel, collected, placed in an ov...

Embodiment 3

[0057] S1. Mechanical treatment: take 100g of Camellia oleifera husk, wash it with distilled water, dry it in the sun, and cut it into 1-3cm pieces;

[0058] S2. Alkaline treatment: Add 10g of small pieces of waste camellia oil husk to 70mL of 4(wt)%NaOH and 4(wt)%Na 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;

[0059] S3. NaOH purification: add 10 g of Camellia oleifera husk cellulose obtained in step S2 into 70 mL of 18 wt% sodium hydroxide solution, heat and stir in a water bath at 70°C for 80 minutes to remove hemicellulose, and prepare Camellia oleifera husk fiber white;

[0060] S4.H 2 o 2 Bleaching: disperse 5 g of Camellia oleifera 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, filtered through a G4 sand core funnel, collected, placed in an ov...

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Abstract

The invention relates to a method for preparing nano-filament cellulose with a high length-diameter ratio by using camellia oleifera shells, belonging to the technical field of nano structure materials. The method comprises the steps of pretreating the camellia oleifera shells serving as an initial raw material by using a sulfite alkaline method, carrying out alkali purification, bleaching by using hydrogen peroxide to obtain camellia oleifera shell cellulose; after that, using a TEMPO / NaClO / NaBr medium oxidation system to treat a great deal of carboxyl groups introduced to fibers of the camellia oleifera shell cellulose, and then further carrying out high-pressure homogenization treatment so as to finally obtain the nano-filament cellulose with the high length-diameter ratio. The method is simple in production technology and easy to implement, and not only well improves the comprehensive utilization value of the camellia oleifera shells and meets the requirements of the sustainable development strategy of China, but also can be used for preparing the nano-filament cellulose which has the high length-diameter ratio and the characteristics of being good in mechanical properties, biodegradable, easy to compound, and the like, thus being widely applied to the industrial fields such as optics, electrics and semiconductor devices.

Description

technical field [0001] The invention relates to a method for preparing nanofibrillar cellulose, and more particularly, to a method for preparing nanofibrillar cellulose by using Camellia oleifera husk fibers. Background technique [0002] Camellia oleiferaabel (Camellia oleiferaabel) is a unique high-quality woody oil tree species in my country, and is one of the four major woody edible oil source tree species along with olive, oil palm and coconut. China is the country with the largest cultivated area, the highest yield and the most abundant varieties of camellia oleifera in the world. According to statistics, my country's existing camellia 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 country's total area. The main products of camellia seeds, camellia oil and tea saponin, have been widely used in the fields of food, medicine, daily chemicals, etc., but the camell...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D21C5/00D21C1/00D21C3/02D21C9/10
CPCD21C1/00D21C3/02D21C5/00D21C9/10
Inventor 李知函毛龙刘跃军肖金昭
Owner HUNAN UNIV OF TECH
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