One-pot method for preparing ascidian nano-microcrystalline cellulose/rubber nanocomposites

A nano-microcrystalline and rubber-nano technology, applied in the field of rubber, can solve problems such as weak interfacial bonding, and achieve the effects of high crystallinity and molecular weight, large aspect ratio, and high length

Active Publication Date: 2020-02-18
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The object of the present invention is to provide a more efficient, economical, and environmentally friendly nano-microcrystalline cellulose / rubber nanocomposite material and a preparation method thereof for the problems existing in the prior art. This method can overcome the current simple physical common The problem of weak interfacial bonding between rubber and nanocrystalline cellulose in the hybrid technology enables nanocrystalline cellulose to exert a better reinforcing effect

Method used

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  • One-pot method for preparing ascidian nano-microcrystalline cellulose/rubber nanocomposites
  • One-pot method for preparing ascidian nano-microcrystalline cellulose/rubber nanocomposites
  • One-pot method for preparing ascidian nano-microcrystalline cellulose/rubber nanocomposites

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Effect test

Embodiment 1～4

[0039] The preparation method of the ascidian nano-microcrystalline cellulose suspension is as follows: soak and clean the ascidian and dissect the capsule; soak the capsule in strong alkali at 40°C for 24 hours to remove the protein and lipid contained therein; Under the condition of 50°C, the capsules from which proteins and lipids have been removed were reacted in a bleaching solution made of glacial acetic acid and sodium hypochlorite for 6 hours, and repeated twice, each time the previous bleaching solution was replaced until the capsules turned white. ; dry the bleached powdered cellulose crystals in an air blast drying oven at 30° C., and pulverize them to micron or millimeter scale; use sulfuric acid with a concentration of 55-65 wt % to pulverize the powdered cellulose crystals Carry out acid hydrolysis, the acid hydrolysis temperature is 40 ℃, time 5h, add a large amount of deionized water after the reaction, dilute the solution and lower the temperature to terminate ...

Embodiment 5～8

[0074] The preparation method of the ascidian nano-microcrystalline cellulose suspension is as follows: soak and wash the ascidian and dissect the capsule; soak the capsule in strong alkali at 60°C for 12 hours to remove the protein and lipid contained therein; Under the condition of 90°C, react the capsules from which proteins and lipids have been removed in the bleaching solution made of glacial acetic acid and sodium hypochlorite for 12 hours, and repeat the process 6 times, each time the previous bleaching solution needs to be replaced until the capsules turn white ; dry the bleached powdered cellulose crystals in an air blast drying oven at 30° C., and pulverize them to micron or millimeter scale; use sulfuric acid with a concentration of 55-65 wt % to pulverize the powdered cellulose crystals Acid hydrolysis, acid hydrolysis temperature is 60 ℃, time 0.5h, add a large amount of deionized water after the reaction, dilute the solution and lower the temperature to terminate ...

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Abstract

The invention discloses a method for preparing a sea squirt nanocrystalline cellulose / rubber nanocomposite with a one-pot process. According to the method, natural latex is diluted at the room temperature, and an emulsifier is slowly dropwise added; a sea squirt nanocrystalline cellulose suspension and emulsified natural latex are blended, and a premix is obtained; formic acid is slowly dropwise added to the premix, and hydrogen peroxide is slowly added for a reaction; after the reaction ends, the pH value is adjusted to 6-8, solidification, blanching, dewatering and drying are performed, and a sea squirt nanocrystalline cellulose / rubber mixture is obtained; the mixture and a vulcanizing agent are mixed in an open mill and left for vulcanizing formation. The problem of poorer strength due to physical interaction of two interfaces in the prior art is solved, and the prepared rubber nanocomposite has excellent properties such as high strength, high modulus, high wear resistance and the like and can more sufficiently play the strengthening effect of nanocrystal cellulose.

Description

technical field [0001] The invention belongs to the technical field of rubber, and in particular relates to a one-pot process for preparing ascidian nano-microcrystalline cellulose / rubber nano-composite materials. Background technique: [0002] Carbon black and silica are the most commonly used reinforcing fillers in the rubber industry, but they have unavoidable defects such as large pollution, high energy consumption, and dependence on petroleum resources. Therefore, it is of great significance to develop sustainable green reinforcing fillers. [0003] Cellulose is a kind of polysaccharide biological material that widely exists in nature, and its yield is very abundant. After a series of treatments, rod-shaped nanocrystalline cellulose (CNs) can be obtained, which has the advantages of large specific surface area, high strength, wide source, and renewable. It is used as a new green reinforcing filler for rubber and as a carbon The supplement or partial replacement of trad...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L15/00C08L1/04C08K13/02C08K3/22C08K5/09C08K3/06C08K5/47C08J3/00C08B15/02C08C19/06
CPCC08B15/02C08C19/06C08J3/005C08J2315/00C08J2400/30C08J2401/04C08K2003/2296C08L15/00C08L2207/20C08L1/04C08K13/02C08K3/22C08K5/09C08K3/06C08K5/47
Inventor 陈玉坤曹黎明范剑锋
Owner SOUTH CHINA UNIV OF TECH
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