CN103849137B

CN103849137B - Conduction TiO2/ PA composite and preparation method thereof

Info

Publication number: CN103849137B
Application number: CN201410040976.1A
Authority: CN
Inventors: 陈超; 郭建鹏; 金幸�; 孟成铭; 杨涛
Original assignee: Shanghai Rizhisheng New Technology Development Co Ltd
Current assignee: Shanghai Rizhisheng New Technology Development Co Ltd
Priority date: 2014-01-27
Filing date: 2014-01-27
Publication date: 2016-05-11
Anticipated expiration: 2034-01-27
Also published as: CN103849137A

Abstract

The invention provides a kind of conduction TiO₂/ PA composite and preparation method thereof; Described material comprises each component of following parts by weight: 50～80 parts of polyamide, conduction TiO₂5～40 parts, 1～10 part of conductive auxiliary agent, 0.1～5 part of auxiliary agent. The invention still further relates to aforesaid conduction TiO₂The preparation method of/PA composite, comprising: (1) takes each component by following content: 50～80 parts of polyamide, conduction TiO₂5～40 parts, 1～10 part of conductive auxiliary agent, 0.1～5 part of auxiliary agent (2), puts into low speed mixer by material and stirs 5min, mixes, and sets extruder temperature, and engine speed is set 35Hz, extruding pelletization. The present invention has good electric conductivity and good mechanical property, overcomes the shortcoming that conventional conductive material can not be matched colors, and has better mobility and processing stability. This product is applicable to being applied to high-end electronic product and electronic shield material.

Description

Conduction TiO2/ PA composite and preparation method thereof

Technical field

The present invention relates to conductive material and preparation method thereof, particularly, relate to a kind of conduction TiO₂/ PA composite and preparation method thereof.

Background technology

Nylon has good mechanical property, and wear-resisting, oil resistant, resistance to solvent, self-lubricity, be one of broad-spectrum engineering plastics. Conventionally the specific insulation of polyamide is all greater than 10¹⁵Ω, along with constantly increasing in the application aspect electronic apparatus, improves constantly the requirement of its electric conductivity. Due to the market demand, much require material itself to have good antistatic effect, or conductive effect, so that material can be used in electromagnetic shielding field or require anlistatig occasion.

The preparation of polyamide electroconductive composite mainly realizes by adding various conductive fillers, the most frequently used conductive filler is conductive black at present, electrically conductive graphite or carbon fiber, conventional method is all to improve the electric conductivity of polyamide as filler by adding conductive black or electrically conductive graphite. Although added in addition other materials as additional conductive agent, conductive black plays a major role in system the inside. Along with Nano-technology Development, CNT and Graphene are also applied to electrically conductive polyamide composite as a kind of filler, but normal and other conductive materials mixing uses such as carbon black and carbon fiber could obtain good electric conductivity. Above-mentioned electrically conductive polyamide material, although there is good electric conductivity, its inevitable shortcoming be exactly color can only be that black and processing characteristics are poor. Another kind of conventional conductive filler is surfactant-based or high score subclass additive, as application number be CN200710172871.1 a kind of flame-retardant antistatic reinforced nylon 6 composition and preparation method, CN201110298092.2 Antistatic nylon material and preparation method thereof, has added high score subclass antistatic additive. In use there are a lot of shortcomings in this class antistatic additive, as antistatic effect lack permanent, add decomposes in man-hour, and the feature such as conduction rate variance.

TiO₂Itself does Chinese white as a kind of filler is conventional, is widely used in the industries such as coating, plastics, rubber, medicine, food. In addition TiO,₂Also there is other special performances, as joined in macromolecule matrix as catalysis and antibacterial filler, prepare relevant functional composite material, CN201010609494.5 nylon/titanic oxide composite nano-microsphere and preparation method thereof, CN201310003682.7 anti-bacteria nylon 6 plastics. Other are as CN201110123178.1 composite insulating material and preparation method thereof, but about conduction TiO₂The article of/PA composite and patent also have no relevant report.

TiO₂Itself is also non-conductive, after its surface modification, can have good electric conductivity, and resistivity only has 1-10 Ω. At electromagnetic shielding, antistatic and surface heater field has potential application widely.

Summary of the invention

For defect of the prior art, the object of this invention is to provide a kind of conduction TiO₂/ PA composite and preparation method thereof.

The present invention is achieved by the following technical solutions:

First aspect, the present invention relates to a kind of conduction TiO2/PA composite, and described material comprises each component of following parts by weight:

Preferably, described polyamide is one or more the mixing in PA-66, PA-6, PA610, PA1010, PA1012, PA612, PA46, MXD6.

Preferably, described conduction TiO₂Process for process surface is coated, its clad is with SnO₂Doping Sb₂O₅The conductive layer of preparation.

Preferably, described conduction TiO₂For thering is the nano-TiO of conducting function₂Powder or micron TiO₂Powder.

Preferably, described conductive auxiliary agent is the auxiliary agent that structure has conduction electron characteristic.

Preferably, described conductive auxiliary agent is polyoxyethylene vinyl copolymer, polyethylene glycol analog copolymer or conducting polymer class polyaniline.

Preferably, described auxiliary agent is lubricant, antioxidant, weather resisting agent.

Second aspect, the invention still further relates to aforesaid conduction TiO₂The preparation method of/PA composite, described method comprises the steps:

(1), take each component by following content:

(2), then material is put into low speed mixer and stir 5min, mix, set extruder temperature, engine speed is set 35Hz, extruding pelletization.

Compared with prior art, the present invention has following beneficial effect:

(1) the present invention utilizes high conductivity and its advantage of easily matching colors of conductive titanate dioxide, has overcome the shortcoming of aforementioned conventional conductive filler, has prepared conduction TiO₂/ PA composite.

(2) in composite of the present invention, add high score subclass conductive auxiliary agent, make TiO₂The conductive network forming is more perfect, thereby improves TiO₂The conductance of/PA composite.

(3) composite of the present invention has better electric conductivity, and specific insulation is minimum can be 1.8 × 10³。

Detailed description of the invention

Below in conjunction with specific embodiment, the present invention is described in detail. Following examples will contribute to those skilled in the art further to understand the present invention, but not limit in any form the present invention. It should be pointed out that to those skilled in the art, without departing from the inventive concept of the premise, can also make some distortion and improvement. These all belong to protection scope of the present invention.

Embodiment 1～4

Embodiment 1～4 relates to conduction TiO₂/ PA composite, component and the content thereof of each embodiment are shown in Table 1:

Embodiment 1～4 also relates to conduction TiO₂The preparation method of/PA composite, comprises the steps:

(1), take the each component in table 1;

(2), then material is put into low speed mixer and stir 5min, mix, set extruder temperature, engine speed is set 35Hz, extruding pelletization, and the temperature that its screw rod is set is shown in Table 2:

The composite that embodiment 1～4 prepares after tested performance indications is shown in Table 3.

Comparative example 1

Comparative example 1 relates to conduction TiO₂/ PA composite, component and content thereof are shown in Table 1:

Comparative example 1 also relates to conduction TiO₂The preparation method of/PA composite, comprises the steps:

(1), take the each component in table 1;

The composite that comparative example 1 prepares after tested performance indications is shown in Table 3.

Table 1

Table 2

Table 3

Project	Embodiment 1	Embodiment 2	Embodiment 3	Embodiment 4	Comparative example 1
						Hot strength/MPa	65	74	72	78	80
Bending strength/MPa	54.3	78.2	76.3	74	85
						Specific insulation/Ω cm	1.8×10³	9.8×10⁴	9.6×10⁵	3.2×10⁶	8.9×10¹²

As known from Table 3, conducing composite material conductance prepared by the present invention improves a lot, and its physical property declines lessly, it can be made into multiple color simultaneously, and visitor has overcome conventional system and only have the shortcoming of single black.

Above specific embodiments of the invention are described. It will be appreciated that, the present invention is not limited to above-mentioned specific implementations, and those skilled in the art can make various distortion or amendment within the scope of the claims, and this does not affect flesh and blood of the present invention.

Claims

1. a conduction TiO₂/ PA composite, is characterized in that, described material comprises each component of following parts by weight:

Described conductive auxiliary agent is the auxiliary agent that structure has conduction electron characteristic;

Described conductive auxiliary agent is polyoxyethylene vinyl copolymer, polyethylene glycol analog copolymer or conducting polymer class polyaniline;

Described auxiliary agent is lubricant, weather resisting agent;

Described conduction TiO₂For thering is the nano-TiO of conducting function₂Powder or micron TiO₂Powder;

Polyamide be a kind of in PA-66, PA-6, PA610, PA1010, PA1012, PA612, PA46, MXD6 orSeveral mixing;

Described conduction TiO₂Process for process surface is coated, its clad is with SnO₂Doping Sb₂O₅The conductive layer of preparation.

2. conduction TiO as claimed in claim 1₂/ PA composite, is characterized in that, described auxiliary agent is antioxidant.

3. a conduction TiO as claimed in claim 1₂The preparation method of/PA composite, is characterized in that, described inMethod comprises the steps:

(1), take each component by following content:

(2), then material is put into low speed mixer and stir 5min, mix, set extruder temperature, engine speedSet 35Hz, extruding pelletization.