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Method for preparing attapulgite/nylon 6 nano-composite by negative ion ring-open method

A nano-composite material and anion ring-opening technology, which is applied in the field of heat-resistant nylon materials, can solve the problems of low relative molecular weight of polymers and long polymerization time, and achieve the effects of short reaction time, low polymerization temperature and simple process flow

Active Publication Date: 2010-07-07
HEFEI GENIUS NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the polymerization of caprolactam is a stepwise polycondensation, resulting in a long polymerization time and a relatively low molecular weight of the polymer

Method used

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  • Method for preparing attapulgite/nylon 6 nano-composite by negative ion ring-open method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] The method for preparing attapulgite / nylon 6 in-situ nanocomposite material by the anion ring-opening method involved in the present invention, the method is realized through the following process steps:

[0016] In the first step, weigh 200g of caprolactam and 0.6g of sodium hydroxide in the reactor and heat to 140°C, remove water in vacuum for 30min, and the vacuum degree is 10 -1 ~10 -3 Pa, after removing the water, remove the vacuum, add 1g of dry attapulgite, and ultrasonicate for 2 hours in a water bath at 80°C under sealed conditions, so that attapulgite forms a homogeneous solution in caprolactam.

[0017] In the second step, add 1.5g of activator 2,6-toluene diisocyanate, stir well, pour it into a mold preheated at 180°C, keep the temperature for 30min, and obtain attapulgite / nylon 6 in-situ nanocomposite after cooling Material.

[0018] The thermal properties of the prepared in-situ nanocomposite material after SEM, DSC, and TGA analysis and characterization...

Embodiment 2

[0020] The method is basically the same as in Example 1, except that the content of attapulgite is changed to 2 g. The thermal properties of the prepared in-situ nanocomposite material after SEM, DSC, and TGA analysis and characterization are shown in Table 1.

Embodiment 3

[0022] The method is basically the same as in Example 1, except that the content of attapulgite is changed to 3g. The thermal properties of the prepared in-situ nanocomposite material after SEM, DSC, and TGA analysis and characterization are shown in Table 1.

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Abstract

The invention relates to a method for preparing an attapulgite / nylon 6 nano-composite by a negative ion ring-open method, the composite comprises raw materials of caprolactam, attapulgite, an activating agent, a catalyst and the like, firstly, the caprolactam and the catalyst are heated to 140 DEG C for vacuum de-watering, then dry attapulgite is added thereto for 2h ultrasound processing in a water bath at a temperature of 80 DEG C under confinement until the attapulgite forms an even solution in a caprolactam melt, then the activating agent is added, the mixture is agitated fully and evenly and poured into a die preheated at a temperature of 180 DEG C, and the attapulgite / nylon 6 in situ nano-composite is obtained after cooling and demoulding. In the attapulgite / nylon 6 in situ nano-composite prepared by the method, the attapulgite can be dispersed in a nylon 6 matrix evenly by a nanoscale, and the melt temperature, crystallization temperature and the heat stability of the composite are all increased.

Description

technical field [0001] The invention relates to the field of heat-resistant nylon materials, in particular to the preparation of attapulgite / nylon 6 in-situ nano-composite materials by means of an anion ring-opening method by means of ultrasonic dispersion. Background technique [0002] Attapulgite (AT) is a mineral rich in aluminum and magnesium, and its chemical formula is (Mg, Al, Fe) 5 Si 8 o 20 (HO) 2 (OH 2 ) 4 4H 2 O. In 1862, Russian scholar Long Kochenkov first discovered this type of mineral in the hydrothermal alteration products of the Ural mining area and named it palygorskite. In 1935, the French scholar Rabatran found it in the bleaching earth of Attapulgite, Georgia, USA, and named it Attapulgite. Its soil is fine and oily, light, brittle, strong in water absorption, sticky and plastic when wet, and has a chain-layer structure, which is different from layered silicates such as montmorillonite. The structure makes it have some special properties. If n...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L77/02C08K3/34C08G69/18C08G69/24
Inventor 吴方娟杨桂生
Owner HEFEI GENIUS NEW MATERIALS
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