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Modified attapulgite and preparing method thereof

An attapulgite and modified technology, which is applied in the treatment of fibrous fillers and dyed low-molecular organic compounds, can solve the problems of high brittleness and poor curing process, and achieve the effects of high grade, blocking heat transfer, and mild reaction temperature

Active Publication Date: 2015-09-02
SUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a multifunctional modifier capable of simultaneously solving the two bottleneck problems of poor curing processability and high brittleness of CE resin. The preparation method is simple and easy, and the source of raw materials is wide, which is suitable for large-scale application

Method used

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  • Modified attapulgite and preparing method thereof
  • Modified attapulgite and preparing method thereof
  • Modified attapulgite and preparing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] (1) Preparation of acidified attapulgite

[0030] Add 1 g of attapulgite to 50 mL of hydrochloric acid (5 mol / L), react at a constant temperature of 75 °C for 1 h, then filter with suction, wash with deionized water until neutral, and dry at 70 °C to obtain acidified attapulgite.

[0031] (2) Preparation of aminated attapulgite

[0032] Disperse 1 g of the acidified attapulgite prepared in step (1) in 60 mL of toluene, and disperse it ultrasonically for 30 minutes to obtain a uniform dispersion A; add 6 mL of γ-aminopropyltriethoxysilane to the dispersion A, and react at 90°C for 8h; filter with suction, wash with ethanol several times, and dry at 60°C to obtain aminated attapulgite.

[0033] (3) Preparation of Schiff base-attapulgite

[0034] Disperse 1 g of the aminated attapulgite prepared in step (2) in 100 mL of ethanol, and disperse it ultrasonically for 30 minutes to obtain a uniform dispersion B of the aminated attapulgite; under stirring conditions, add 16 mL...

Embodiment 2

[0042] Disperse 1 g of the Schiff base-attapulgite obtained in step (3) of Example 1 in 100 mL of ethanol, and stir with a strong mixer for 25 min to obtain a uniform dispersion C of Schiff base-attapulgite; 2 Under protection and stirring conditions, add 4.52g of manganese acetate tetrahydrate to the dispersion C, and then reflux for 12 hours; then filter with suction, wash with ethanol several times, and dry at 65°C to obtain modified attapulgite.

[0043] Provide comparative example 1:

[0044] (1) Preparation of cyanate resin prepolymer

[0045] Stir 100g of 2,2'-bis(4-cyanophenyl)propane (also known as bisphenol A cyanate) at 90°C, and ultrasonically disperse for 40min; then stir at 140°C for 12min to obtain cyanide Ester resin prepolymer. Its differential scanning calorimetry (DSC) curve is shown in the appendix Figure 5 .

[0046] (2) Preparation of cyanate ester cured resin

[0047] Pour the cyanate ester prepolymer prepared in step (1) into the mold, vacuum dega...

Embodiment 3

[0070] Disperse 1 g of the Schiff base-attapulgite prepared in step (3) of Example 1 in 100 mL of ethanol, and disperse it ultrasonically at 40 mm to obtain a uniform dispersion C of Schiff base-attapulgite; 2 Under the conditions of protection and stirring, 1.98g of manganese acetate tetrahydrate was added to the dispersion C, and then refluxed for 12 hours; then suction filtered, washed with ethanol several times, and dried at 60°C to obtain modified attapulgite.

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Abstract

The invention discloses modified attapulgite and a preparing method thereof. The modified attapulgite is composed of attapulgite and manganese Schiff base. The preparing method of the modified attapulgite includes the steps that the attapulgite and hydrochloric acid are reacted to obtain acidulated attapulgite, and then the acidulated attapulgite is reacted with methylbenzene and gamma-aminopropyltriethoxysilane to obtain amination attapulgite; the amination attapulgite is added into mixed liquid composed of salicylaldehyde and ethyl alcohol for reaction to obtain attapulgite with Schiff base grafted to the surface; then the attapulgite is mixed with manganous acetate tetrahydrate, backflow, stirring and reacting are carried out in the N2 atmosphere, and the modified attapulgite is obtained after suction filtering, washing and drying are carried out. By means of the modified attapulgite, cyanate ester resin can be remarkably catalyzed and toughened at the same time, and the heat resistance of the resin is improved. The preparing method of the modified attapulgite has the advantages of being simple in technology, easy to control, wide in raw material source, low in cost and the like.

Description

technical field [0001] The invention relates to a modified attapulgite and its preparation technology, in particular to a modified attapulgite and its preparation method. Background technique [0002] Since the birth of the world's first artificial synthetic resin, thermosetting resins have been playing an important role in the field of modern industrial technology, and heat-resistant thermosetting resins have become key basic materials in high-tech fields such as electronic information, new energy, and aerospace. However, heat-resistant thermosetting resins generally have the problems of poor curing processability (high temperature, long time) and high brittleness. [0003] The addition of catalysts or tougheners is a common way to solve these two problems respectively. Catalysts can improve the curing process, but they also often increase the degree of curing of the resin, resulting in a further increase in the brittleness of the resin. The selection of tougheners for he...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09C1/42C09C3/08
Inventor 梁国正张小宝顾嫒娟袁莉
Owner SUZHOU UNIV
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