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Nano-zinc oxide modified nanocrystalline cellulose reinforced natural rubber and preparation method thereof

A technology of nanocrystalline cellulose and nano-zinc oxide, which is applied in the field of rubber materials, can solve complex problems and achieve the effects of improving tensile strength and elongation at break, good physical and mechanical properties, and improved friction properties

Inactive Publication Date: 2020-07-10
TAICANG RONGNAN SEAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above-mentioned modification method of nanocrystalline cellulose requires multiple reactions, which is relatively complicated, and the traditional mixing method is used to prepare rubber composite materials, and a variety of additives are added to ensure the physical and mechanical properties of the composite rubber.
There is no easier preparation method and product of modified nanocrystalline cellulose reinforced rubber

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] This embodiment provides a method for preparing a natural rubber composite material reinforced by nano-zinc oxide modified nanocrystalline cellulose, and the specific steps are as follows:

[0026] (1) NCC is made into a NCC suspension with a mass fraction of 10% by magnetic stirring and ultrasonic dispersion;

[0027] (2) Zn(AcO) 2 2H 2 The O alcohol solution is dispersed in the NCC suspension in step (1), and stirred at 80 ° C to form a uniform mixed solution, and the pH value of the mixed solution is adjusted to 10 by using a sodium hydroxide solution with a concentration of 5 mol / L. ;

[0028] (3) After continuing to heat the suspension in step (2) for 2h, the AgNO with a mass fraction of 10% 3 Add the aqueous solution to the suspension, and stir vigorously to make it evenly mixed, and continue to react for 3 hours;

[0029](4) centrifuging the reacted suspension in step (3) to obtain a precipitate, carefully washing the precipitate three times with distilled wa...

Embodiment 2

[0034] This embodiment provides a method for preparing a natural rubber composite material reinforced by nano-zinc oxide modified nanocrystalline cellulose, and the specific steps are as follows:

[0035] (1) NCC is made into a NCC suspension with a mass fraction of 15% by magnetic stirring and ultrasonic dispersion;

[0036] (2) Zn(AcO) 2 2H 2 The O alcohol solution is dispersed in the NCC suspension in step (1), and stirred at 70° C. to form a uniform mixed solution, and the pH value of the mixed solution is adjusted to 10 by using a sodium hydroxide solution with a concentration of 5 mol / L. ;

[0037] (3) After continuing to heat the suspension in step (2) for 3h, the AgNO with a mass fraction of 15% 3 Add the aqueous solution to the suspension, and stir vigorously to make it evenly mixed, and continue to react for 2 hours;

[0038] (4) Centrifuge the reacted suspension in step (3) to obtain a precipitate, carefully wash the precipitate three times with distilled water,...

Embodiment 3

[0043] This embodiment provides a method for preparing a natural rubber composite material reinforced by nano-zinc oxide modified nanocrystalline cellulose, and the specific steps are as follows:

[0044] (1) NCC is made into a NCC suspension with a mass fraction of 10% by magnetic stirring and ultrasonic dispersion;

[0045] (2) Zn(AcO) 2 2H 2 The O alcohol solution is dispersed in the NCC suspension in step (1), and stirred at 90° C. to form a uniform mixed solution, and the pH value of the mixed solution is adjusted to 10 by using a sodium hydroxide solution with a concentration of 5 mol / L. ;

[0046] (3) After continuing to heat the suspension in step (2) for 3h, the AgNO with a mass fraction of 20% 3 Add the aqueous solution to the suspension, and stir vigorously to make it evenly mixed, and continue to react for 4 hours;

[0047] (4) Centrifuge the reacted suspension in step (3) to obtain a precipitate, carefully wash the precipitate three times with distilled water,...

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Abstract

The invention discloses a nano-zinc oxide modified nanocrystalline cellulose reinforced natural rubber and a preparation method thereof. The nano-zinc oxide modified nanocrystalline cellulose reinforced natural rubber is formed by compounding nano-zinc oxide, nanocrystalline cellulose and natural rubber. The preparation method comprises the following steps: firstly, synthesizing nano-zinc oxide / nanocrystalline cellulose by adopting a hydrothermal method, and then preparing the modified nanocrystalline cellulose reinforced natural rubber by adopting a sol-gel method. The prepared nano-zinc oxide modified nanocrystalline cellulose reinforced natural rubber has good physical and mechanical properties, the tensile strength and the elongation at break are remarkably improved, and the high temperature resistance, the ageing resistance and the friction performance are all improved to a certain extent. The preparation process is simple, reaction conditions are not harsh, and no harmful substance is generated.

Description

technical field [0001] The invention belongs to the field of rubber materials, and relates to a modified natural rubber and a preparation method thereof, in particular to a nano-zinc oxide modified nanocrystalline cellulose reinforced natural rubber and a preparation method thereof. Background technique [0002] Nanocrystalline cellulose (NCC) can be obtained by degrading cellulose raw materials with mixed acid or sulfuric acid. Because of its small particle size, large specific surface area, and certain hydrophilicity, it has some unique optical properties and rheological properties. and mechanical properties. These characteristics make NCC have a wide range of applications: it can be combined with other materials to prepare degradable nanomaterials, and it can also be used as a reinforcement doped into other materials to improve its mechanical properties. [0003] Since the specific surface of NCC particles is extremely large and the surface hydroxyl groups are very rich,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L7/00C08L1/04C08K3/22
CPCC08K2003/2296C08K2201/011C08L7/00C08L2201/08C08L1/04C08K3/22
Inventor 金涛陈勇邱宇航
Owner TAICANG RONGNAN SEAL TECH
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