CN105111892A - LED heat-dissipation fiber coating and preparation method therefor - Google Patents

Abstract

The present invention discloses an LED heat-dissipation fiber coating and a preparation method therefor. The LED heat-dissipation fiber coating consists of the following raw materials in parts by weight: 360-400 parts of high-density polyethylene, 100-130 parts of sodium hydroxide, 400-420 parts of bisphenol A, 160-180 parts of epichlorohydrin, 10-12 parts of silicon nitride, 2-3 parts of acrylic amide, 1-1.6 parts of ammonium chloride, 0.05-0.1 part of N,N-methylenebisacrylamide, 3-4 parts of ammonium persulfate, 0.01-0.02 part of TritonX114, 1.8-2 parts of aqueous ammonia, 10-20 parts of diethylenetriamine, 30-42 parts of carbon nano-tubes, 20-30 parts of precipitated barium sulfate, 2-3 parts of ammonium metaborate, 3-4 parts of ethyl cellulose, 5-7 parts of dimethyl methylphosphonate, 18-20 parts of calcined kaolin, 5-7 parts of polyoxypropylene glycol, and 0.7-1 part of lauryl diethanolamide. According to the invention, the added ethyl cellulose can effectively improve the compatibility of all the materials, thereby improving the dispersion effect.

Description

A kind of led heat radiation fiber coating and preparation method thereof

Technical field

The present invention relates to heat radiation coating technical field, particularly relate to a kind of led heat radiation fiber coating and preparation method thereof.

Background technology

Epoxy resin is one of very important thermoset macromolecule material, has cohesive strength high, and electrical insulation capability is good, the advantages such as shrinking percentage is low, good processability, is widely used in each fields such as electronics, machinery, building;

CNT (carbon nano-tube) has higher thermal conductivity, therefore CNT (carbon nano-tube) is filled in epoxy resin as packing material and has good application prospect as a kind of heat sink material, but due to the nano effect of CNT (carbon nano-tube), CNT (carbon nano-tube) is more difficult dispersion in the epoxy.

Summary of the invention

The object of the invention is exactly the defect in order to make up prior art, provides a kind of led heat radiation fiber coating and preparation method thereof.

The present invention is achieved by the following technical solutions:

A kind of led heat radiation fiber coating, it is made up of the raw material of following weight parts:

High density polyethylene(HDPE) 360-400, sodium hydroxide 100-130, dihydroxyphenyl propane 400-420, epoxy chloropropane 160-180, silicon nitride 10-12, acrylamide 2-3, ammonium chloride 1-1.6, N,N methylene bis acrylamide 0.05-0.1, ammonium persulphate 3-4, TritonX1140.01-0.02, ammoniacal liquor 1.8-2, diethylenetriamine 10-20, CNT (carbon nano-tube) 30-42, process white 20-30, ammonium metaborate 2-3, ethyl cellulose 3-4, dimethyl methyl phosphonate 5-7, calcined kaolin 18-20, polyoxypropyleneglycol 5-7, lauroyl diethanolamine 0.7-1.

A preparation method for described led heat radiation fiber coating, comprises the following steps:

(1) above-mentioned sodium hydroxide is added water, be mixed with the sodium hydroxide solution of 10-15%;

(2) by CNT (carbon nano-tube), silicon nitride, ammonium chloride mixing, ball milling is even;

(3) above-mentioned lauroyl diethanolamine is joined in 16-20 times of water, add ethyl cellulose, stir, obtain fibre emulsion;

(4) by aforesaid propylene acid amides, N,N methylene bis acrylamide, TritonX114 mixing, join in 40-50 times of water, stir, add above-mentioned ball milling material, 1400-1500 rev/min of dispersed with stirring 1-2 minute, add ammonium persulphate, ammoniacal liquor, leave standstill 3-4 hour, obtain frothy gel;

(5) by above-mentioned fiber solution, frothy gel mixing, stir, obtain fibrous foam gel;

(6) by above-mentioned polyoxypropyleneglycol, dimethyl methyl phosphonate mixing, insulated and stirred 7-10 minute at 80-90 DEG C, add the 5-10% of above-specified high density polyethylene weight, stir, drip the Virahol of above-mentioned mixed system weight 10-15%, dropwise in the oil bath of rear feeding 130-135 DEG C, insulated and stirred 3-5 minute, discharging cools, and mixes with ammonium metaborate, stir, obtain modified poly ethylene;

(7) in the sodium hydroxide solution of above-mentioned 10-15%, dihydroxyphenyl propane is added, raised temperature is 60-65 DEG C, add frothy gel, ultrasonic stirring process 30-40 minute, adds epoxy chloropropane, raised temperature is 80-85 DEG C, insulated and stirred 3-4 hour, adds modified poly ethylene, stirs, cooling after washing, to neutral, is dried;

(8) material after above-mentioned oven dry is mixed with diethylenetriamine, stir 3-5 minute, add each raw material of residue, stir, be sent in twin screw extruder and melt extrude, pulverize and sieve after cooling, obtain described heat radiation coating.

Advantage of the present invention is:

(1) powder coating of the present invention has good resistance to impact shock:

Carbon nanotube has larger surfactivity, with macromolecular chain generation physics or chemically combined chance many, increase with substrate contact area, carbon nanotube forms the reactive force much larger than Van der Waals force with epoxide group on interface, form desirable interface, be conducive to the Stress transmit between CNT (carbon nano-tube) and epoxy resin, improve the ability bearing load, when matrix material is subject to foreign impacts power, epoxy resin can pass to carbon nanotube and silicon nitride surging force, make carbon nanotube, silicon nitride absorbs more energy, thus matrix material can be made to bear higher impact force,

(2) powder coating of the present invention has very high sticking power:

The string stress making to produce in curing of coating process that adds of carbon nanotube, silicon nitride reduces, thus the sticking power of film is improved;

(3) powder coating of the present invention has good salt spray resistance:

Carbon nanotube, silicon nitride have good dispersiveness in the epoxy, and the carbon nanotube of these good distribution, silicon nitride can play the effect of extra physical crosslinking point, and the compactness of the powder coating film obtained is improved, and salt spray resistance also increases thereupon;

(4) powder coating of the present invention has good thermal diffusivity:

Silicon nitride has very low specific inductivity, good chemical stability and heat-shock resistance, inherently there is good heat conductivility, and the material after curing molding formed a kind of with the network structure of polyacrylamide be skeleton, foam and particle stabilized to exist wherein, there is some strength and flexible porous body, stable heat dissipation channel is formed between these stable hole CNT (carbon nano-tube), be conducive to distributing of heat, greatly improve thermal conductivity.

The ethyl cellulose that the present invention adds effectively can improve the consistency of each storeroom, improves dispersion effect.

Embodiment

A kind of led heat radiation fiber coating, it is made up of the raw material of following weight parts:

High density polyethylene(HDPE) 360, sodium hydroxide 100, dihydroxyphenyl propane 400, epoxy chloropropane 160, silicon nitride 10, acrylamide 2, ammonium chloride 1, N, N methylene-bisacrylamide 0.05, ammonium persulphate 3, TritonX1140.01, ammoniacal liquor 1.8, diethylenetriamine 10, CNT (carbon nano-tube) 30, process white 20, ammonium metaborate 2, ethyl cellulose 3, dimethyl methyl phosphonate 5, calcined kaolin 18, polyoxypropyleneglycol 5, lauroyl diethanolamine 0.7.

A preparation method for described led heat radiation fiber coating, comprises the following steps:

(1) above-mentioned sodium hydroxide is added water, be mixed with the sodium hydroxide solution of 10%;

(2) by CNT (carbon nano-tube), silicon nitride, ammonium chloride mixing, ball milling is even;

(3) above-mentioned lauroyl diethanolamine is joined in 16 times of water, add ethyl cellulose, stir, obtain fibre emulsion;

(4) by aforesaid propylene acid amides, N, N methylene-bisacrylamide, TritonX114 mixing, join in 40 times of water, stir, add above-mentioned ball milling material, 1400 revs/min of dispersed with stirring 1 minute, add ammonium persulphate, ammoniacal liquor, leave standstill 3 hours, obtain frothy gel;

(5) by above-mentioned fiber solution, frothy gel mixing, stir, obtain fibrous foam gel;

(6) by above-mentioned polyoxypropyleneglycol, dimethyl methyl phosphonate mixing, insulated and stirred 7 minutes at 80 DEG C, add 5% of above-specified high density polyethylene weight, stir, drip the Virahol of above-mentioned mixed system weight 10%, dropwise in the oil bath of rear feeding 130 DEG C, insulated and stirred 3 minutes, discharging cools, and mixes with ammonium metaborate, stir, obtain modified poly ethylene;

(7) in the sodium hydroxide solution of above-mentioned 10%, dihydroxyphenyl propane is added, raised temperature is 60 DEG C, add frothy gel, ultrasonic stirring process 30 minutes, adds epoxy chloropropane, raised temperature is 80 DEG C, insulated and stirred 3 hours, adds modified poly ethylene, stirs, cooling after washing, to neutral, is dried;

(8) material after above-mentioned oven dry is mixed with diethylenetriamine, stir 3 minutes, add each raw material of residue, stir, be sent in twin screw extruder and melt extrude, pulverize and sieve after cooling, obtain described heat radiation coating.

Performance test:

Impact resistance is 32kgcm;

Sticking power and resistance to Neutral Salt Spray Corrosion grade are 2 grades;

Thermal conductivity is 0.513W/mK.

Claims (2)

1. a led heat radiation fiber coating, is characterized in that what it was made up of the raw material of following weight parts:

High density polyethylene(HDPE) 360-400, sodium hydroxide 100-130, dihydroxyphenyl propane 400-420, epoxy chloropropane 160-180, silicon nitride 10-12, acrylamide 2-3, ammonium chloride 1-1.6, N,N methylene bis acrylamide 0.05-0.1, ammonium persulphate 3-4, TritonX1140.01-0.02, ammoniacal liquor 1.8-2, diethylenetriamine 10-20, CNT (carbon nano-tube) 30-42, process white 20-30, ammonium metaborate 2-3, ethyl cellulose 3-4, dimethyl methyl phosphonate 5-7, calcined kaolin 18-20, polyoxypropyleneglycol 5-7, lauroyl diethanolamine 0.7-1.

2. a preparation method for led heat radiation fiber coating as claimed in claim 1, is characterized in that comprising the following steps:

(1) above-mentioned sodium hydroxide is added water, be mixed with the sodium hydroxide solution of 10-15%;

(2) by CNT (carbon nano-tube), silicon nitride, ammonium chloride mixing, ball milling is even;

(3) above-mentioned lauroyl diethanolamine is joined in 16-20 times of water, add ethyl cellulose, stir, obtain fibre emulsion;

(4) by aforesaid propylene acid amides, N,N methylene bis acrylamide, TritonX114 mixing, join in 40-50 times of water, stir, add above-mentioned ball milling material, 1400-1500 rev/min of dispersed with stirring 1-2 minute, add ammonium persulphate, ammoniacal liquor, leave standstill 3-4 hour, obtain frothy gel;

(5) by above-mentioned fiber solution, frothy gel mixing, stir, obtain fibrous foam gel;

(6) by above-mentioned polyoxypropyleneglycol, dimethyl methyl phosphonate mixing, insulated and stirred 7-10 minute at 80-90 DEG C, add the 5-10% of above-specified high density polyethylene weight, stir, drip the Virahol of above-mentioned mixed system weight 10-15%, dropwise in the oil bath of rear feeding 130-135 DEG C, insulated and stirred 3-5 minute, discharging cools, and mixes with ammonium metaborate, stir, obtain modified poly ethylene;

(7) in the sodium hydroxide solution of above-mentioned 10-15%, dihydroxyphenyl propane is added, raised temperature is 60-65 DEG C, add frothy gel, ultrasonic stirring process 30-40 minute, adds epoxy chloropropane, raised temperature is 80-85 DEG C, insulated and stirred 3-4 hour, adds modified poly ethylene, stirs, cooling after washing, to neutral, is dried;

(8) material after above-mentioned oven dry is mixed with diethylenetriamine, stir 3-5 minute, add each raw material of residue, stir, be sent in twin screw extruder and melt extrude, pulverize and sieve after cooling, obtain described heat radiation coating.