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Montmorillonite-modified silicon rubber nanocomposite and preparation method thereof

A silicone rubber nano-composite material technology, applied in the field of modified silicone rubber nano-composite materials and its preparation, can solve the limited increase in montmorillonite layer spacing and thermal stability, and improve the mechanical and thermal stability of polymers Insignificant and other problems, to achieve excellent mechanical and heat resistance, excellent processing performance, the effect of heat resistance improvement

Inactive Publication Date: 2012-07-25
SHANGHAI UNIV OF ENG SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, the commonly used organic intercalation agents in montmorillonite are quaternary ammonium salt surfactants, but the interlayer spacing and thermal stability of montmorillonite after modification are limited. The effect of thermal stability improvement is not significant

Method used

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  • Montmorillonite-modified silicon rubber nanocomposite and preparation method thereof
  • Montmorillonite-modified silicon rubber nanocomposite and preparation method thereof
  • Montmorillonite-modified silicon rubber nanocomposite and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Weigh 92 grams of component A into a plastic beaker, add 1 gram of organic montmorillonite, and stir vigorously for 10 minutes to mix and disperse the montmorillonite and silicone rubber component A; then add 8 grams of component B And 0.1 g of chloroplatinic acid, stir vigorously to fully mix it with component A; put the plastic beaker into a vacuum oven with a vacuum of 80pa and vacuum at room temperature to exhaust the bubbles; take out the beaker and mix the mixture Pour into the Teflon mold, put the mold in a vacuum oven, the vacuum degree is 110pa, vacuum at room temperature, and discharge the air bubbles; put the mold with the sample into the 80 ℃ oven, and the curing reaction 50 After taking it out within minutes, the silicone rubber / organic montmorillonite nano composite material of the present invention can be obtained.

[0039] The tensile strength, elongation at break and center temperature of thermal weight loss of silicone rubber nanocomposites are shown in T...

Embodiment 2

[0041] Weigh 91 grams of component A in a plastic beaker, add 2 grams of organic montmorillonite, and stir vigorously for 20 minutes to make the montmorillonite and silicone rubber component A uniformly mixed and dispersed; then add 9 grams of component B And 0.2 g of chloroplatinic acid, stir vigorously to fully mix it with component A; put the plastic beaker into a vacuum oven with a vacuum of 90pa and vacuum at room temperature to exhaust the bubbles; take out the beaker and mix the mixture Pour into the Teflon mold, put the mold into a vacuum oven, the vacuum degree is 120pa, vacuum at room temperature, and discharge the bubbles; put the mold weighing the sample into the oven at 100℃, and the curing reaction 40 After taking it out within minutes, the silicone rubber / organic montmorillonite nano composite material of the present invention can be obtained.

[0042] The tensile strength, elongation at break and center temperature of thermal weight loss of silicone rubber nanocom...

Embodiment 3

[0044] Weigh 90 grams of component A in a plastic beaker, add 3 grams of organic montmorillonite, and stir vigorously for 30 minutes to make the montmorillonite and silicone rubber component A uniformly mixed and dispersed; then add 10 grams of component B And 0.3 g of chloroplatinic acid, stir vigorously to fully mix it with component A; put the plastic beaker into a vacuum oven with a vacuum of 100pa and vacuum at room temperature to exhaust the bubbles; take out the beaker and mix the mixture Pour into the Teflon mold, put the mold into a vacuum oven, the vacuum degree is 130pa, vacuum at room temperature, and discharge the bubbles; put the mold weighing the sample into the oven at 120℃, and the curing reaction is 30 After taking it out within minutes, the silicone rubber / organic montmorillonite nano composite material of the present invention can be obtained.

[0045] The tensile strength, elongation at break and center temperature of thermal weight loss of silicone rubber na...

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Abstract

The invention discloses a montmorillonite-modified silicon rubber nanocomposite and a preparation method thereof. The montmorillonite-modified silicon rubber nanocomposite comprises the following components in parts by weight: 90-92 parts of component A, 8-10 parts of component B, 0.1-0.3 part of catalyst and 1-3 parts of organic montmorillonite, wherein the component A is crude ethenyl (or isoallyl)-containing terminated silicon rubber; the component B is hydrogen-containing polysiloxane; the catalyst is chloroplatinic acid or other soluble platinic compound; the organic montmorillonite is hyperbranched quaternary ammonium salt modified organic montmorillonite; and the montmorillonite is taken as a reinforcing material of silicon rubber. The prepared silicon rubber nanocomposite has the advantages of: (1) higher mechanical property and heat resistance, (2) higher processability, (3) more economical and practical preparation technology; and the characteristics play an important role in making the silicon rubber / organic montmorillonite nanocompoiste practical.

Description

Technical field [0001] The invention relates to a modified silicon rubber nano composite material and a preparation method thereof. Background technique [0002] Silicone rubber is a chain structure formed by Si-O bonds, and its main composition is linear polysiloxane with high molar mass. Since the Si-O-Si bond is the basic bond type, the silicon atom is mainly connected to the methyl group, and a very small amount of unsaturated groups are introduced into the side chain. The intermolecular force is small, and the molecule has a spiral structure with the methyl group facing outward. The arrangement and free rotation make silicone rubber have better heat resistance, electrical insulation and chemical stability than other ordinary rubbers. Because silicone rubber is physiologically inert, non-toxic, has no adhesion to other materials, and can withstand repeated cooking and sterilization, it is widely used in medical and health and food industries, such as artificial heart valves,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L83/07C08L83/05C08K9/04C08K3/34
CPCC08L83/04C08G77/12C08G77/20C08L83/00C08K5/56C08K3/346C08K9/04
Inventor 王锦成郭燕郝文莉徐楠郑晓昱杨科
Owner SHANGHAI UNIV OF ENG SCI
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