Method for preparing tetrapod-shaped zinc oxide whisker/natural latex composite latex film

A technology of four-needle zinc oxide and composite latex, which is applied in the field of preparation of four-needle zinc oxide whisker/natural latex composite latex film, can solve the problems of difficult uniform dispersion, weak binding force, interface defects, etc., and achieve wide application The effect of prospect, simple process and low cost

Inactive Publication Date: 2015-05-06
LONGYAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the hydrophilic and oleophobic properties of the four-needle ZnO whiskers make it difficult to disperse uniformly in organic media, and the bonding force with the matrix is ​​weak, which easily causes interface defects, resulting in the failure of the natural rubber latex composite film to achieve the ideal performance.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Add 21.7g of tetraacicular zinc oxide whiskers to 250ml of distilled water, stir for 50min at a water bath temperature of 75°C and a stirring speed of 800r / min, and gradually add 5% (relative to the mass of tetraacicular zinc oxide whiskers Percent) 10ml absolute ethanol solution of zinc octadecanoate. After the tetraacicular zinc oxide whisker is modified, it is filtered while it is hot, and the filter cake is dried at 85° C. for 2 hours to obtain the modified tetraacicular zinc oxide whisker product.

[0020] Preparation of tetrapod zinc oxide whisker / natural latex composite latex film: the modified tetrapod zinc oxide whisker is ultrasonically dispersed to prepare tetrapod zinc oxide whisker dispersion. Add the dispersion containing 6.7g of tetrapod zinc oxide whiskers to 166.7g of natural rubber latex (total solid content: 60%), and then add vulcanization compounding agent 20% KOH solution, 0.5g; 50% sulfur Dispersion, 2g; 40% zinc oxide dispersion, 1g; 50% acceler...

Embodiment 2

[0023] Add 21.7g of tetraacicular zinc oxide whiskers to 250ml of distilled water, stir for 50min at a water bath temperature of 75°C and a stirring speed of 800r / min, and gradually add 5% (relative to the mass of tetraacicular zinc oxide whiskers Percent) 10ml absolute ethanol solution of si69. After the tetraacicular zinc oxide whisker is modified, it is filtered while it is hot, and the filter cake is dried at 85° C. for 2 hours to obtain the modified tetraacicular zinc oxide whisker product.

[0024] Preparation of tetrapod zinc oxide whisker / natural latex composite latex film: the modified tetrapod zinc oxide whisker is ultrasonically dispersed to prepare tetrapod zinc oxide whisker dispersion. Add the dispersion containing 8.3g of four needle-shaped zinc oxide whiskers to 166.7g of natural rubber latex (total solid content: 60%), and then add vulcanization compounding agent 20% KOH solution, 0.5g; 50% sulfur Dispersion, 2g; 40% zinc oxide dispersion, 1g; 50% accelerator...

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Abstract

The invention discloses a method for preparing a tetrapod-shaped zinc oxide whisker / natural latex composite latex film. The method comprises the steps: heating slurry of tetrapod-shaped zinc oxide whiskers in water bath, stirring, adding an anhydrous ethanol solution or acetone solution of a surface treating agent gradually at the temperature of 75 DEG C, carrying out modifying treatment for 40 minutes, then, filtrating while the treated solution is hot, and drying; carrying out ultrasonic dispersion, so as to prepare a tetrapod-shaped zinc oxide whisker dispersion liquid; adding the tetrapod-shaped zinc oxide whisker dispersion liquid into natural latex in hot-water bath, and then, adding a vulcanizing ingredient, so as to obtain pre-vulcanized compounded latex; cooling the pre-vulcanized compounded latex, filtrating, then, pouring a filtrate into a glass plate with a frame, and drying and carrying out film forming at room temperature; and then, leaching, then, drying in the air, putting the compounded latex film into a drying oven, vulcanizing at the temperature of 85 DEG C, thereby preparing the tetrapod-shaped zinc oxide whisker / natural latex composite latex film. The composite latex film has the tensile strength of 25-34MPa, the 300% stress at definite elongation of 1.2-1.4MPa, the tear strength of 36-52KN / m and the elongation at break of 708-880%.

Description

technical field [0001] The invention relates to a preparation method of a natural latex composite latex film, in particular to a preparation method of a four-acicular zinc oxide whisker / natural latex composite latex film. Background technique [0002] Natural rubber latex has excellent film-forming properties, and the physical properties of the film are good, but its application is limited due to its low mechanical strength and small modulus. Therefore, it must be reinforced and modified to meet the needs of society. To meet the requirements of development, low-cost, high-performance green and environment-friendly latex products are prepared. [0003] Tetraacicular zinc oxide whisker is a crystal with a unique three-dimensional space structure, which can achieve a uniform three-dimensional distribution in the matrix material, so that various physical properties of the composite material can be isotropically improved, and the matrix strength can be significantly improved. An...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J5/18C08J3/24C08L7/02C08K13/06C08K9/04C08K9/02C08K7/08C08K3/06C08K3/22
Inventor 陈晰邱天吴粦华胡志彪张著森吴杰
Owner LONGYAN UNIV
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