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Modified adhesive powder nano-composite material with sodium silicate as silicon source and method for producing the same

A technology of nano-composite material and modified rubber powder, applied in the field of modified rubber powder nano-composite material and its preparation, can solve the problems of high toxicity and high cost, achieve the effects of molecular-level dispersion, improve compatibility and simplify process

Inactive Publication Date: 2010-06-23
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But because what the reaction precursor of this method adopts is orthosilicate ethyl ester or trichlorosiloxane, solvent selects tetrahydrofuran, has certain toxicity, and cost is higher

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] See Table 1 for the amounts of rubber powder, sodium silicate, water and sulfuric acid in parts by weight.

[0034] Table 1

[0035] Raw materials (parts by weight)

1#

2#

3#

4#

5#

6#

7#

rubber powder

100

100

100

100

100

100

100

Sodium silicate

0.5

1

4

12

30

10

15

water

25

50

100

120

150

100

100

sulfuric acid

Appropriate amount *

Appropriate amount

Appropriate amount

Appropriate amount

Appropriate amount

Appropriate amount

Appropriate amount

ethanol

400

500

600

200

800

400

400

[0036] in, * Appropriate amount means that the pH value of the control system is between 3.5 and 4.0.

[0037] Mix the ingredients in Table 1 evenly, adjust the pH of the sys...

Embodiment 2

[0047] See Table 3 for the dosage of rubber powder, sodium silicate, water and sulfuric acid

[0048] table 3

[0049]

[0050]

[0051] * Appropriate amount means that the pH value of the control system is between 4.0 and 4.5.

[0052] Mix the raw materials in the above ratio evenly, place in a water bath at 50°C, stir for 8 hours, then filter the product out, age at room temperature for 5 hours, then filter and dry to constant weight.

[0053] The obtained modified rubber powder nanocomposite material is applied to natural rubber, and the ratio of raw materials is as follows: natural rubber NR: 100; modified rubber powder nanocomposite material: 50; stearic acid: 2; ZnO: 5; Agent CZ: 1.5; accelerator DM: 0.5; antioxidant 4010NA: 1.5; sulfur: 1.5.

[0054] Mixed at room temperature on a Φ160 open mill, and vulcanized on a 25-ton flat vulcanizer at a vulcanization temperature of 143°C. Table 4 lists the mechanical properties of the vulcanized rubber obta...

Embodiment 3

[0059] The types and amounts of rubber powder, sodium silicate, water, sulfuric acid and organosiloxane are shown in Table 5

[0060] table 5

[0061]

[0062]

[0063] * Appropriate amount means that the pH value of the control system is between 4.0 and 4.5.

[0064] Among them, the organosiloxanes in 1#-8# are respectively, γ-aminopropyltriethoxysilane (KH-550), γ-glycidoxypropyltrimethoxysilane (KH-560) , γ-(methacryloyloxy)propyltrimethoxysilane (KH-570), vinyltriethoxysilane (A-151), N-(β-aminoethyl)-γ-aminopropyl Methyldimethoxysilane, γ-mercaptopropyltrimethoxysilane, γ-chloropropyltriethoxysilane, long chain alkyltrimethoxysilane (dodecyl trichlorosilane).

[0065] Mix the raw materials in the above ratio evenly, place in a water bath at 40°C, stir for 10 hours, then filter the product out, age at room temperature for 10 hours, then filter, and dry to constant weight.

[0066]The obtained modified rubber powder nanocomposite material is applied ...

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PUM

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Abstract

The invention discloses a modified gelatine powder nano composite material using sodium silicate as silicon source and a preparation method thereof. The preparation method comprises the following steps that: water, the gelatine powder, solvent, a precursor, catalyzer and organic siloxane are added into a vessel in sequence, which are dissolved in the water at the temperature of 40-80 DEG C; the pH value is regulated to 3.5-5.0 and the mixture is stirred for 2 to 10 hours; then the product is filtrated, taken out and is aged at room temperature for 2 to 10 hours and then dried in vacuum until the weight is constant. The compatibility of the gelatine powder and matrix is enhanced due to the preparation method of the invention, which ensures that the gelatine powder can be applied in different matrixes and shows relatively good comprehensive capacity. The technique is simplified and the reaction time is shortened. The modified gelatine powder nano composite material has better physical, mechanical and thermal capacities and realizes molecule level interpenetrating of the nano silicon dioxide and the gelatine powder networks.

Description

technical field [0001] The invention relates to a rubber powder nanocomposite material and a preparation method thereof, in particular to a modified rubber powder nanocomposite material with sodium silicate as a silicon source and a preparation method thereof. Background technique [0002] Rubber powder is a powder substance with a certain network structure made of waste vulcanized rubber by mechanical crushing or grinding. Since rubber powder is a polymer network whose cross-linked structure is not completely destroyed, the movement of surface molecular chains is limited to a certain extent, and it contains less reactive groups, so it is difficult to form chemical bonds during rubber processing. If it is directly mixed in rubber or plastic, it is difficult to form a good bond at the interface, which will lead to a significant decline in the mechanical properties of the composite material. [0003] Previously, the rubber powder hybrid modification technology applied by the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08K5/541C08J3/00C08L21/00
Inventor 刘岚贾德民罗远芳于利刚鹿海华
Owner SOUTH CHINA UNIV OF TECH
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