Preparation method of cellulose nanocrystal/carbon black/natural rubber composite

A nano-microcrystalline and natural rubber technology, applied in the field of rubber, can solve the problems of high pollution, high energy consumption, dependence on petroleum resources, etc., and achieve the effect of increasing cross-linking density, low cost, and superior mechanical properties

Inactive Publication Date: 2011-02-16
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] As the most traditional and important reinforcing filler in the rubber industry, carbon black has excellent reinforcing properties, but

Method used

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  • Preparation method of cellulose nanocrystal/carbon black/natural rubber composite
  • Preparation method of cellulose nanocrystal/carbon black/natural rubber composite
  • Preparation method of cellulose nanocrystal/carbon black/natural rubber composite

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0060] Example 1

[0061] In the first step, 169.5g of 59% natural rubber latex (equivalent to 100g of dry rubber) was placed in a 1L beaker and stirred for 15min at room temperature;

[0062] In the second step, 5g of nanocrystalline cellulose was added to 100g of ethanol solution with a mass fraction of 95% at 60°C, the pH was adjusted to 5 with acetic acid, 0.5g of coupling agent A151 was added, and the reaction was stirred for 90min;

[0063] The third step is to add nanocrystalline cellulose into the natural rubber latex that is evenly stirred, and stir and mix at room temperature for 45 minutes;

[0064] The fourth step is to pour the well-stirred mixture of natural rubber / nano-microcrystalline cellulose into the tray, and spray 10% CaCL by mass. 2 The solution was demulsified, co-precipitated, washed for 20 hours, and dried in a blast drying oven at 60°C to a constant weight to obtain a solid natural rubber / nano-microcrystalline cellulose mixture;

[0065] In the fift...

Example Embodiment

[0068] Example 2

[0069] In the first step, 169.5g of 59% natural rubber latex (equivalent to 100g of dry rubber) was placed in a 1L beaker and stirred for 15min at room temperature;

[0070] In the second step, 0g, 5g, 10g, 15g, 20g and 25g of nanocrystalline cellulose were added to 0g, 50g, 100g, 150g, 200g and 250g of ethanol solution with a mass fraction of 95% at 60°C, respectively. 6 samples, adjust the pH to 7, add 0g, 0.5g, 1.0g, 1.5g, 2.0g, 2.5g of coupling agent Si-69 to the 6 samples respectively, and stir the reaction for 90min;

[0071] The third step is to add nanocrystalline cellulose into the natural rubber latex that is evenly stirred, and stir and mix at room temperature for 45 minutes;

[0072] The fourth step is to pour the well-stirred mixture of natural rubber / nano-microcrystalline cellulose into the tray, and spray 10% CaCL by mass. 2 The solution is demulsified, co-precipitated and washed for 20 hours, and dried in a blast drying oven at 60°C to a co...

Example Embodiment

[0074] Example 3

[0075] In the first step, 169.5g of 59% natural rubber latex (equivalent to 100g of dry rubber) was placed in a 1L beaker and stirred for 20min at room temperature;

[0076] The second step is to add 0g, 5g, 10g, 15g, 20g, 25g of nanocrystalline cellulose to 0g, 50g, 100g, 150g, 200g, 250g of 95% ethanol solution (NCC The mass is 10% of the mass of the ethanol solution), adjust the pH to 5 with acetic acid, then add 0g, 0.5g, 1.0g, 1.5g, 2.0g, 2.5g of coupling agent NDZ102, respectively, and stir the reaction for 120min;

[0077] In the third step, the nanocrystalline cellulose is added to the natural rubber latex which is evenly stirred, and the mixture is stirred and mixed for 60min at room temperature;

[0078]The fourth step is to pour the well-stirred mixture of natural rubber / nano-microcrystalline cellulose into the tray, and spray 10% CaCL by mass. 2 The solution was demulsified, co-precipitated, washed for 24 hours, and dried in a blast drying oven...

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Abstract

The invention discloses a preparation method of a nanocrystals cellulose/carbon black/rubber composite. The nanocrystals cellulose (NCC) is prepared through the acidolysis of microcrystalline cellulose, is a rod-like crystal product with the diameter of 20-60nm and the average length of 300nm, is characterized by reproducibility, low density, orientation, high strength and the like and can be used as the novel reinforced material of rubber; the NCC has simple preparation method and low price and is accessible. Researches prove that the reinforcing effect of the NCC to rubber is better than carbon black, the thermal-oxydative aging property of rubber can be well improved, the heat build-up of the composite can be reduced, and the traditional rubber process technology can also be adopted to prepare the NCC/carbon black/rubber composite. The NCC/carbon black/rubber composite prepared by the method can be used to prepare various vulcanized rubber products.

Description

technical field [0001] The invention belongs to the field of rubber, in particular to a preparation method of nano-microcrystalline cellulose / carbon black / natural rubber composite material. Background technique [0002] As the most traditional and important reinforcing filler in the rubber industry, carbon black has excellent reinforcing properties, but at the same time it also has unavoidable shortcomings such as high pollution, high energy consumption, and dependence on petroleum resources. Cellulose is a kind of polysaccharide biological material widely existing in nature, and the cellulose synthesized in nature every year in the world can reach 10 10 ~10 11 Ton. Microcrystalline cellulose produced by cellulose degradation has a relatively complete crystalline structure and excellent mechanical properties. Compared with traditional fillers such as carbon black, microcrystalline cellulose has the advantages of extensive sources, low cost, renewable, degradable, environm...

Claims

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Application Information

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IPC IPC(8): C08K3/04C08L1/02C08L7/00C08K13/02
Inventor 古菊林路徐苏华罗远芳贾德民
Owner SOUTH CHINA UNIV OF TECH
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