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Polypropylene composite material and preparation method thereof

A composite material and polypropylene technology, which is applied in the field of polypropylene composite material and polypropylene composite material preparation, can solve the problems of high molding shrinkage, insufficient toughness, easy brittle cracking, etc., to improve porosity and enhance modification effect. Effect

Pending Publication Date: 2022-03-18
CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At the same time, polypropylene also has some disadvantages, such as excessive molding shrinkage, easy brittle cracking at low temperature, insufficient toughness, low wear resistance, and aging by ultraviolet radiation, resulting in a significant reduction in strength and toughness. These problems need to be solved. Solved by modifying

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Take a certain amount of sepiolite (two types of sepiolite powder and sepiolite wool), add it to a large beaker according to the mass ratio of sepiolite to water at 1:5, and hydrate overnight. Add a certain volume of dilute hydrochloric acid, stir until no bubbles are generated, and remove calcium carbonate; after standing for a period of time, take the suspension with uniform color in the upper layer, wash and filter until neutral. Separation and purification on a centrifuge to obtain purified sepiolite. After the purified sepiolite is filtered, washed, and vacuum-dried at 120°C, it is ground and put into a ziplock bag for use.

[0030] After the sepiolite is purified, use hydrochloric acid for surface treatment, soak the sepiolite in deionized water for 20 minutes, separate the scum, filter it, soak it with 1.0mol / L HCl solution at a constant temperature of 70°C for 10 hours, and control the solid-liquid ratio 10:1, then wash with distilled water, vacuum filter, remov...

Embodiment 2

[0035] Take a certain amount of sepiolite (two types of sepiolite powder and sepiolite wool), add it to a large beaker according to the mass ratio of sepiolite to water at 1:5, and hydrate overnight. Add a certain volume of dilute hydrochloric acid, stir until no bubbles are generated, and remove calcium carbonate; after standing for a period of time, take the suspension with uniform color in the upper layer, wash and filter until neutral. Separation and purification on a centrifuge to obtain purified sepiolite. After the purified sepiolite is filtered, washed, and vacuum-dried at 120°C, it is ground and put into a ziplock bag for use.

[0036] After the sepiolite is purified, use hydrochloric acid for surface treatment, soak the sepiolite in deionized water for 25 minutes, separate the scum, filter it, soak it with 0.9mol / L HCl solution at a constant temperature of 70°C for 10 hours, and control the solid-liquid ratio 10:1, then wash with distilled water, vacuum filter, remov...

Embodiment 3

[0041] Take a certain amount of sepiolite (two types of sepiolite powder and sepiolite wool), add it to a large beaker according to the mass ratio of sepiolite to water at 1:5, and hydrate overnight. Add a certain volume of dilute hydrochloric acid, stir until no bubbles are generated, and remove calcium carbonate; after standing for a period of time, take the suspension with uniform color in the upper layer, wash and filter until neutral. Separation and purification on a centrifuge to obtain purified sepiolite. After the purified sepiolite is filtered, washed, and vacuum-dried at 120°C, it is ground and put into a ziplock bag for use.

[0042] After the sepiolite is purified, use hydrochloric acid for surface treatment, soak the sepiolite in deionized water for 30 minutes, separate the scum, filter it, soak it with 1.2mol / L HCl solution at a constant temperature of 70°C for 10 hours, and control the solid-liquid ratio 10:1, then washed with distilled water, vacuum filtered to...

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PUM

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Abstract

The invention relates to a preparation method of a polypropylene composite material. The polypropylene composite material is prepared from 55-90 parts by mass of polypropylene, 3-5 parts by mass of modified sepiolite, 1-2 parts by mass of modified nano TiO2 and a processing aid, the sepiolite is subjected to surface treatment by a hydrochloric acid solution, and the preparation process comprises the following steps: soaking the sepiolite, removing scum, filtering, carrying out acid treatment, filtering, drying, firing at 500 DEG C, cooling and modifying the sepiolite; the preparation method comprises the following steps: carrying out surface treatment on nano TiO2 by using methyl methacrylate, stirring TiO2, deionized water and sodium dodecyl sulfate, heating to a certain temperature, dropwise adding a certain amount of methyl methacrylate after stirring, and after the reaction is finished, carrying out reduced pressure filtration, drying to a constant amount, and grinding into particles to obtain modified nano TiO2; the composite material is prepared by the following steps: drying polypropylene, modified sepiolite and modified nano TiO2, mixing in a mixer according to a certain proportion, extruding and granulating, and carrying out injection molding.

Description

technical field [0001] The invention relates to the technical field of new materials, in particular to a waterproof and moisture-resistant polypropylene composite material with excellent mechanical properties and anti-aging; the invention also relates to a preparation method of the polypropylene composite material. Background technique [0002] Polypropylene (Polyetheretherketone, referred to as PP) is a semi-crystalline thermoplastic. It has high impact resistance, strong mechanical properties, and resistance to various organic solvents and acid and alkali corrosion. It is widely used in industry and is one of the common polymer materials. [0003] At the same time, polypropylene also has some disadvantages, such as excessive molding shrinkage, easy brittle cracking at low temperature, insufficient toughness, low wear resistance, and aging by ultraviolet radiation, resulting in a significant reduction in strength and toughness. These problems need to be solved. Solved by ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L23/12C08K9/02C08K3/34C08K3/22C08K9/04C08K7/10C08K7/26
CPCC08K9/02C08K3/346C08K7/10C08K7/26C08K3/22C08K9/04C08L2201/08C08K2201/011C08K2003/2241C08L23/12
Inventor 肖林娇周卓龚杨春
Owner CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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