High-temperature-resistant antistatic modified polyamide and preparation method thereof

Abstract

The invention discloses high-temperature-resistant antistatic modified polyamide and a preparation method thereof. The preparation method comprises the following steps: S1, uniformly mixing chlorobenzyl trichlorosilane, anhydrous toluene and anhydrous pyridine to obtain a mixed solution, and adding dried glass fibers into the mixed solution to obtain glass fibers A; s2, adding octadecyl dimethyl tertiary amine into trichloromethane, stirring and dispersing the component, and adding the glass fiber A to obtain a material A; s3, adding 3,4-vinyl dioxythiophene into the sulfonate solution, and stirring to obtain a material B; and S4, melting polyamide, sequentially adding the material A and the material B into the polyamide melt, then adding an antioxidant, a flexibilizer and water, and performing stirring and extrusive granulation to obtain the modified polyamide. The polyamide material prepared by the invention is good in mechanical property, high in thermal stability, good in antistatic property and antibacterial property, low in cost, simple in reaction principle, mild in condition, outstanding in comprehensive performance and relatively good in application prospect, and components such as an antistatic agent and a bacteriostatic agent do not need to be additionally added.

Description

technical field [0001] The invention relates to the technical field of polyamide, in particular to a high-temperature resistant and antistatic modified polyamide and a preparation method thereof. Background technique [0002] Polyamide, commonly known as nylon, has excellent wear resistance, chemical resistance, flexibility, and flame retardancy, and is widely used in chemical industry, electrical parts, mechanical parts, etc. With the rapid development of related industries, there is an increasing demand for high-performance polyamide materials in the market, and filling polyamide materials with materials such as glass fiber and carbon fiber to improve the heat resistance and wear resistance of polyamide materials has already can gradually become mainstream. [0003] The main component of glass fiber is silica, which has strong thermal insulation ability and strong surface inertia. If it is directly mixed into polyamide material, the problem of poor dispersion and easy agg...

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Problems solved by technology

[0003] The main component of glass fiber is silica, which has strong thermal insulation ability and strong surface inertia. If it is directly mixed into polyamide material, the problem of poor dispersion and easy agglomeration of glass fiber often occurs; Insufficient compatibility between fiber and polyamide, which will reduce the chemical force between polyamide molecular chains. Although the heat resistance of the prepared polyamide material is greatly improved, the toughness and rigidity are reduced.

[0004] At present, there are few studies on the antistatic and antibacterial properties of polyamide materials on the market, which limits the application of polyamide materials in certain medical and static environments, and directly adds antistatic agents and antibacterial agents to polyamide materials. Chemical reagents such as bacterial agents will affect the intrinsic properties of polyamide materials, so people urgently need a polyamide material with good mechanical properties, strong antibacterial effect, and good anti-point performance to solve the problems raised in the above background

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