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Imvite, polyurethane/imvite nanometer composite material with surface modification and production thereof

A nano-composite material and surface modification technology, applied in the field of polymer nano-composite materials and their preparation, can solve problems such as polyurethane nano-composite materials that have not been seen, and achieve the effect of broadening the application field and scope

Inactive Publication Date: 2005-07-27
NANJING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are no research reports on the modification of montmorillonite surface hydroxyl groups with diphenylmethane diisocyanate and the application of this surface-modified montmorillonite to polyurethane systems to prepare polyurethane nanocomposites in China.

Method used

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  • Imvite, polyurethane/imvite nanometer composite material with surface modification and production thereof
  • Imvite, polyurethane/imvite nanometer composite material with surface modification and production thereof
  • Imvite, polyurethane/imvite nanometer composite material with surface modification and production thereof

Examples

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Effect test

Embodiment 1

[0026] The surface-modified montmorillonite of the present invention is obtained by modifying the surface hydroxyl groups of organic montmorillonite with diphenylmethane diisocyanate. Its preparation method comprises the following steps:

[0027] 1. Preparation of organic montmorillonite: add 40g montmorillonite and 725ml distilled water into a three-neck flask, stir and heat up to 80°C; add 17.5g cetyltrimethylammonium bromide and 20ml distilled water into a beaker, heat to 80°C; then mix the two and stir for 8 hours; the reaction product is filtered and washed with distilled water until there is no Br - Ions (with 0.1mol / l AgNO 3 Solution test filtrate until no precipitation); vacuum-dried, ground, and passed through a 325-mesh sieve.

[0028] 2. Preparation of surface-modified montmorillonite: Add 16 g of organic montmorillonite and 784 g of toluene prepared in step 1 into a dry four-necked bottle, stir to form a suspension, and then pour dry N 2 protection, add 16g of d...

Embodiment 2

[0030] Another preparation method of surface-modified montmorillonite according to the present invention:

[0031] Add 40g of organic montmorillonite and 760g of toluene prepared in step 1 of Example 1 to the dry four-necked bottle, stir into a suspension and feed into dry N 2 For protection, add 40 g of diphenylmethane diisocyanate and react at 80° C. for 6 hours. The reaction product was suction-filtered under reduced pressure, then extracted with toluene for 24 hours, dried, ground, and passed through a 325-mesh sieve.

Embodiment 3

[0033] Another preparation method of surface-modified montmorillonite according to the present invention:

[0034] Add 64g of organic montmorillonite and 736g of toluene prepared in step 1 of Example 1 to the dry four-necked bottle, stir into a suspension and feed into dry N 2 protection, add 70g of diphenylmethane diisocyanate, and react at 90°C for 12 hours. The reaction product was suction-filtered under reduced pressure, then extracted with toluene for 24 hours, dried, ground, and passed through a 325-mesh sieve.

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PUM

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Abstract

An imvite with surface modification, polyurethane / imvite nanometer composite material and its production are disclosed. The imvite production is carried out by adding organic imvite and toluene into reacting bottle, agitating to become suspension, inducing inactive gas, adding excess diphenylmethane and vulcabond, modifying reacting, filtering reaction product, extracting by toluene, drying, grinding and screening. The polyurethane / imvite with surface modification nanometer composite material consists of polyurethane 90-98wt%, imvite with surface and modification 2-10wt%. The production is carried out by dissolving polyurethane into N,N-methane-formamide, adding imvite with surface modification, agitating, dispersing by ultrasonic wave, pouring into mould, and drying. It achieves higher stretching and cracking strength.

Description

1. Technical field [0001] The invention relates to a surface-modified montmorillonite, a polymer nanocomposite and a preparation method thereof, in particular to a surface-modified montmorillonite with diphenylmethane diisocyanate, a polyurethane / surface Modified montmorillonite nanocomposites and methods for their preparation. 2. Background technology [0002] Polyurethane elastomers have excellent properties such as wear resistance, oil resistance, chemical corrosion resistance, tear resistance, and high elasticity. Research on their filling modification has been active. Since 1998, Pinnavaia T J and others first prepared polyurethane / montmorillonite nanocomposites, and studied the dispersion of organic montmorillonite in polyol polyether. Chen T K synthesized a new type of polyurethane / montmorillonite nanocomposite material by chain extension of polyhydroxycaprolactone / montmorillonite nanocomposite and polyurethane prepolymer in solution, and the introduction of a small ...

Claims

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Application Information

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IPC IPC(8): C08K9/04C08L75/04C09C3/08
Inventor 吴石山沈健
Owner NANJING UNIV
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