Preparation method for nanocrystals cellulose/white carbon black/rubber composite material

A nano-crystal and composite material technology, applied in the rubber field, can solve the problems of light damage to polymer materials, increased density of vulcanized rubber, serious processing pollution, etc. Effect

Inactive Publication Date: 2011-04-06
SOUTH CHINA UNIV OF TECH
View PDF1 Cites 38 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A series of organic fillers such as white carbon black have a relatively high density (silica is about 2.5g / cm3), and the density of carbon black is also about 1.8g / cm3, while the density of general-purpose raw rubber is about 1.1g / cm3 or less. This makes the density of vulcanized rubber reinforced with inorganic substances significantly increase, which to a certain extent damages the important characteristic of light weight of polymer materials.
Secondly, the problems of carbon black and white carbon black in terms of energy and environment are also very serious: (1) carbon black comes from petroleum, and petroleum is a non-renewable resource, so with the depletion of petroleum, the output of carbon black will also be affected. threaten
(2) Both of them have the disadvantages of long processing time, large mixing energy consumption and serious processing pollution during the processing process.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Preparation method for nanocrystals cellulose/white carbon black/rubber composite material
  • Preparation method for nanocrystals cellulose/white carbon black/rubber composite material
  • Preparation method for nanocrystals cellulose/white carbon black/rubber composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] In the first step, 169.5g mass fraction of 59% natural rubber latex (equivalent to 100g dry rubber) is placed in a 1L beaker, and stirred for 5min at room temperature;

[0062] In the second step, at 20°C, add 10g of nanocrystalline cellulose to 100g of ethanol solution with a mass fraction of 95%, adjust the pH to 9.5 with sodium bicarbonate, add 0.5g of coupling agent KH-550, and stir for 30 minutes ;

[0063] The third step is to add nano-microcrystalline cellulose to the evenly stirred natural rubber latex, and stir and mix at room temperature for 15 minutes;

[0064] The fourth step is to pour the evenly stirred nano-microcrystalline cellulose / natural rubber mixture into the tray, and spray 10% CaCl in mass fraction 2 The solution was demulsified, co-precipitated, washed for 12 hours, and dried in a blast drying oven at 40°C to a constant weight to obtain a solid nanocrystalline cellulose / natural rubber mixture;

[0065] The 5th step carries out mixing with the o...

Embodiment 2

[0068] In the first step, 169.5g mass fraction of 59% natural rubber latex (equivalent to 100g dry rubber) is placed in a 1L beaker, and stirred for 5min at room temperature;

[0069] In the second step, at 40° C., 0 g, 2 g, 4 g, 6 g, and 8 g of nanocrystalline cellulose (NCC) are added to a mass fraction of 95% ethanol solution (the quality of NCC is 10% of the ethanol solution quality), Adjust the pH to 7, add 1g RH, and stir for 30 minutes;

[0070] The third step is to add nano-microcrystalline cellulose to the evenly stirred natural rubber latex, and stir and mix at room temperature for 15 minutes;

[0071] The fourth step is to pour the evenly stirred nano-microcrystalline cellulose / natural rubber mixture into the tray, and spray 10% CaCl in mass fraction 2 The solution was demulsified, co-precipitated, washed for 12 hours, and dried in a blast drying oven at 40°C to a constant weight to obtain a solid nanocrystalline cellulose / natural rubber mixture;

[0072] The 5th ...

Embodiment 3

[0074] In the first step, 169.5g mass fraction of 59% natural rubber latex (equivalent to 100g dry rubber) is placed in a 1L beaker, and stirred at room temperature for 10min;

[0075] The second step is at 50 DEG C, the nanocrystalline cellulose that quality is respectively 0g, 5g, 10g, 15g, 20g, 25g is added to the ethanol solution that mass fraction is 95% (the quality of NCC is 10% of ethanol solution quality ), adjust the pH at 5 with acetic acid, add 1g modifier KH-570, and stir for 60 minutes;

[0076] The third step is to add the modified nano-microcrystalline cellulose with uniform stirring reaction to the evenly stirred natural rubber latex, and stir and mix at room temperature for 30 minutes;

[0077] The fourth step is to pour the evenly stirred nano-microcrystalline cellulose / natural rubber mixture into the tray, and spray 10% CaCl 2 The solution was demulsified, co-precipitated, washed for 16 hours, and dried in a blast drying oven at 50°C to a constant weight t...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
diameteraaaaaaaaaa
lengthaaaaaaaaaa
densityaaaaaaaaaa
Login to view more

Abstract

The invention discloses a preparation method for a nanocrystals cellulose/white carbon black/rubber composite material. The nanocrystals cellulose (Nanocrystals Cellulose, called NCC for short) is a rod-shaped crystallized product which is obtained by performing acidolysis on microcrystalline cellulose, has the diameter of between 20 and 60 nm and the average length of 300 nm, can serve as a novel reinforcing material for rubber, and has the characteristics of reproducibility, low density, orientation, high strength and the like; moreover, the preparation method is simple and convenient; the cost is low; and the NCC is easy to obtain. Researches discover that a reinforcing effect of the NCC to natural rubber is superior to that of white carbon black; the thermal-oxidative ageing property of the natural rubber is improved very well; simultaneously the heat generation of the composite material is reduced; and the nanocrystals cellulose/white carbon black/a rubber composite material can be prepared by adopting a conventional rubber processing process. The nanocrystals cellulose/white carbon black/a rubber composite material prepared by the invention can be used for manufacturing various vulcanized rubber products.

Description

technical field [0001] The invention belongs to the field of rubber, and in particular relates to a preparation method of nano-microcrystalline cellulose / white carbon black / rubber composite material. Background technique [0002] Silica and carbon black have always been important rubber reinforcing fillers because of their excellent reinforcing effect. However, they all have their prominent disadvantages. A series of organic fillers such as white carbon black have a relatively high density (silica is about 2.5g / cm3), and the density of carbon black is also about 1.8g / cm3, while the density of general-purpose raw rubber is about 1.1g / cm3 or less. This makes the density of vulcanized rubber reinforced by inorganic substances significantly increase, which to some extent damages the important characteristic of light weight of polymer materials. Secondly, the energy and environmental problems of carbon black and white carbon black are also very serious: (1) carbon black comes f...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): C08L7/00C08L1/02C08K3/36C08K13/02
Inventor 古菊徐苏华罗远芳贾德民
Owner SOUTH CHINA UNIV OF TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap