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High-temperature-resistant polyurethane/modified vermiculite composite material and preparation method thereof

A composite material and polyurethane technology, applied in the field of high temperature resistant polyurethane/modified vermiculite composite material and its preparation, can solve the disadvantages of composite materials and other problems, and achieve simple and easy preparation method, mild reaction conditions, mechanical properties and temperature resistance good performance

Inactive Publication Date: 2014-12-10
SOUTHWEST PETROLEUM UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to improve the physical and chemical properties of vermiculite, it is necessary to modify vermiculite. Clay minerals such as vermiculite contain hydrated cations used to supplement the electricity price between the layers, and the surface is hydrophilic, which is very unfavorable for the polymer to enter the preparation of composite materials.

Method used

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  • High-temperature-resistant polyurethane/modified vermiculite composite material and preparation method thereof
  • High-temperature-resistant polyurethane/modified vermiculite composite material and preparation method thereof
  • High-temperature-resistant polyurethane/modified vermiculite composite material and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] The preparation method of embodiment 1 nano base vermiculite

[0016] After pulping the raw vermiculite according to the mass ratio of vermiculite to water of 1:10, add a slightly excess amount of sodium agent NaCl according to the cation exchange capacity (119mmol / 100g), stir in a water bath at 70-75°C for about 2 hours, and cool Suction filtration, washing with deionized water for several times, and then activating at 110° C. for 2 hours in an electric thermostat blast drying oven, grinding, and sieving (200 mesh) to prepare sodium-based vermiculite.

Embodiment 2

[0017] Example 2 The preparation method of different long-chain quaternary ammonium salt surfactants modified vermiculite

[0018] 10g nano-base vermiculite is pulped, add dodecyltrimethylammonium bromide (DTAB) 3.67g, tetradecyltrimethylammonium bromide ( TTAB) 4.00g, cetyltrimethylammonium bromide (CTAB) 4.33g, octadecyldimethylbenzyl ammonium chloride (ODBAC) 5.05g, octadecyltrimethylammonium bromide ( OTAB) 4.66g and behenyltrimethylammonium chloride (BTAC) 4.80g, stirred in a water bath at 70-75°C for about 2h, cooled and filtered, washed with deionized water several times, and then heated with an electric thermostat drum Air drying oven was activated at 110°C for 2 hours to produce different long-chain quaternary ammonium salt surfactant-modified vermiculite (X-VMT, X represents surfactant). It can be seen from the infrared spectrum that at 2920cm -1 、2850cm -1 Methyl-CH appears on both left and right 3 and methylene-CH 2 stretching vibration absorption peak; 1470cm...

Embodiment 3

[0019] Example 3 Preparation method of modified vermiculite with different additions of octadecyltrimethylammonium bromide

[0020] 10g nano-based vermiculite is pulped, and according to the cation exchange capacity (119mmol / 100g) of vermiculite, the addition of octadecyltrimethylammonium bromide is respectively 4.66g (1 times, 1-OTAB), 13.98g ( 3 times, 3-OTAB) and 23.30g (5 times, 5-OTAB), stirred in a water bath at 70-75°C for about 2 hours, cooled and filtered, washed with deionized water for many times, and then dried in an electric constant temperature blast drying oven Activated at 110°C for 2 hours to produce organically modified vermiculite with different additions of octadecyltrimethylammonium bromide (Y-OTAB-VMT, Y represents the multiple of OTAB). It can be seen from the infrared spectrum that 3445cm -1 The left and right broad absorption peaks are the stretching vibration absorption peaks of water-OH adsorbed on the surface and interlayer of vermiculite; 2920cm ...

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Abstract

The invention relates to a high-temperature-resistant polyurethane / modified vermiculite composite material and a preparation method thereof. The invention adopts the technical scheme as follows: the preparation method comprises the following steps: (1) performing sodium-based modification on primary mineral of vermiculite as a raw material to obtain sodium-based vermiculite, pulping the sodium-based vermiculite, adding quaternary ammonium salt surfactants with different long chains, stirring in a water bath with the temperature of 70-75 DEG C for about 2 hours, cooling, performing suction filtration, washing, and activating at 110 DEG C for 2 hours to prepare organic modified vermiculite; (2) adding the 3% organic modified vermiculite into polycarbonate polyol, performing high-speed stirring and ultrasonic dispersion for 2 hours, adding 1,4-cyclohexyl diisocyanate, reacting at 75 DEG C for 30 minutes to obtain a prepolymer, cooling the prepolymer to be 70 DEG C, controlling the value of R (-NCO / -OH), and adding a curing agent to obtain the high-temperature-resistant polyurethane / modified vermiculite composite material. The preparation methods of the organic modified vermiculite and the composite material are simple, the reaction conditions are mild, the mechanical property of the prepared composite material is remarkably improved, the temperature-resistant range can reach about 300 DEG C, and the composite material can be used for blocking a thick oil steam breakthrough channel.

Description

technical field [0001] The invention relates to a high-temperature-resistant polyurethane / modified vermiculite composite material and a preparation method thereof, in particular to a high-temperature-resistant polyurethane / modified vermiculite composite material and a preparation method thereof which can be used to block heavy oil steam channeling. technical background [0002] The general physical properties of vermiculite are similar to mica, often in the form of scales, flakes or monoclinic pseudocrystals. Vermiculite is roasted at high temperature, and its volume expands rapidly. It has a small space layer, which greatly increases the volume of the cavity, and has excellent properties such as heat insulation, low temperature resistance, flame retardancy and water absorption. Vermiculite is a special layered silicate mineral. Its crystal structure is composed of three basic structural layers. Exchangeable cations. This structural feature of vermiculite makes it have hig...

Claims

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Application Information

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IPC IPC(8): C08L75/04C08K9/04C08K3/34C08G18/66C08G18/44
Inventor 张太亮李泽锋全红平田天黄志宇
Owner SOUTHWEST PETROLEUM UNIV
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