Anti-static phosgene modified polyacrylonitrile carbon fiber

Abstract

The invention discloses an anti-static phosgene modified polyacrylonitrile carbon fiber which is characterized by being prepared through the steps of: uniformly mixing 180 parts of acrylonitrile, 10 parts of methyl acrylate and 10 parts of itaconic acid, adding an azo initiator of 1 part of dimethyl 2,2'-azobis(2-methylpropionate) and 1 part of 1-((cyano-1-methylethyl)azo)formamide for carrying out polymerization reaction to produce an polyacrylonitrile base carbon fiber precursor; and modifying the polyacrylonitrile base carbon fiber precursor through COCl2 by adopting an immersion method. An anti-static coating obtained by using the carbon fiber in the invention as an anti-static additive has better tensile property, impact resistance, wear resistance and corrosion resistance, and also has better anti-static property.

Description

technical field [0001] The invention belongs to the field of antistatic materials, and relates to a phosgene-modified polyacrylonitrile carbon fiber for antistatic. Background technique [0002] Static electricity is generated by mutual friction or induction between objects, such as gas transportation and discharge, liquid stirring and spraying, solid crushing and grinding, dust mixing and sieving, etc., all of which will generate static electricity, and the static electricity protection is slightly negligent. , it may cause fire, explosion and personal electric shock, and sometimes interfere with normal production and affect product quality. Therefore, it is necessary to take practical protective measures against static electricity. In industrial production, antistatic coatings are often sprayed on the surface of products or workpieces to eliminate static electricity hazards. the goal of. In current antistatic coatings, the main antistatic additives are metal powder or gr...

AI Technical Summary

Problems solved by technology

[0002] Static electricity is generated by mutual friction or induction between objects, such as gas transportation and discharge, liquid stirring and spraying, solid crushing and grinding, dust mixing and sieving, etc., all of which will generate static electricity, and the static electricity protection is slightly negligent. , it may cause fire, explosion and personal electric shock, and sometimes interfere with normal production and affect product quality. Therefore, it is necessary to take practical protective measures against static electricity. In industrial production, antistatic coatings are often sprayed on the surface of products or workpieces to eliminate static electricity hazards. the goal of

In current antistatic coatings, the main antistatic additives are metal powder or graphite powder. Although both have good electrical conductivity, metal powder is easy to oxidize, graphite powder has poor adhesion, and is difficult to absorb in the coating. Form a continuous conductive network, can not achieve the ideal anti-static effect

In addition, the final antistatic coating should also have good impact resistance, wear resistance and corrosion resistance. It is difficult for existing antistatic coatings to fully meet these requirements.

The Chinese patent whose publication number is CN1632002 discloses a preparation method of an antistatic coating, which is mainly prepared by mixing expanded graphite materials with organic film-forming substances and solvents, and its conductivity and impact resistance are relatively poor; the publication number is CN1422919 The domestic patent discloses nano-polyurethane antistatic coating and its preparation method, which is mainly prepared by mixing mica as a conductive agent with nano-polyurethane, which improves the wear resistance, but the conductive effect is poor; the national patent with the publication number of CN1085927 discloses an antistatic The preparation method of electrostatic coating is mainly made by mixing aluminum powder and polyurethane, and its conductivity and wear resistance are not ideal.

[0003] Carbon fiber has good electrical conductivity, corrosion resistance and wear resistance, and is an ideal additive for antistatic coatings. The domestic patent with the publication number CN1286931C discloses a carbon fiber conductive electrostatic coating and its preparation method. It is made by mixing short-cut carbon fiber with epoxy resin. It has good conductivity and corrosion resistance, but its application fields are limited, and it cannot meet the special requirements of electrostatic protection for some special fields such as aircraft radomes.

[0004] The national patent with the publication number CN101220535A discloses a kind of antistatic carbon fiber made of polyacrylonitrile fiber, which has good impact resistance, wear resistance and corrosion resistance, but the conductivity is still not ideal