CN105968522A - Carbon nanotube reinforced anti-oxidation geogrid and preparation method thereof - Google Patents
Carbon nanotube reinforced anti-oxidation geogrid and preparation method thereof Download PDFInfo
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Abstract
The invention discloses a carbon nanotube reinforced anti-oxidation geogrid. The carbon nanotube reinforced anti-oxidation geogrid is prepared from, by weight, 1.6-2 parts of calcium acetylacetonate, 0.7-1 part of alkenyl succinic anhydride, 1-2 parts of barium stearate, 0.1-0.3 part of lithium aluminum hydride, 0.3-1 part of 4-dimethyl aminopyridine, 0.4-1 part of an antioxidant 1010, 10-15 parts of multiwalled carbon nanotubes, 0.6-1 part of an antioxidant 168, 10-17 parts of polypropylene imine, 6-8 parts of tert-butyl acrylate, 140-160 parts of high density polyethylene, 0.3-1 part of bisphenol-a diglycidyl ether, 0.6-1 part of 2-thiolbenzimidazole, 4-6 parts of dibutyl maleate and 0.4-1 part of lithium naphthenate. The carbon nanotube reinforced anti-oxidation geogrid has advantages that content of free radicals participating in polymer auto-oxidation chain reaction is greatly reduced, a polymer oxidative degradation process is decelerated, and oxidation resistance of finished products is improved.
Description
Technical field
The present invention relates to GSZ technical field, particularly relate to a kind of CNT and strengthen antioxidation GSZ and preparation method thereof.
Background technology
CNT is as typical monodimension nanometer material, compared with traditional filler, has the advantages such as great draw ratio, the elastic modelling quantity of superelevation and bending strength, peculiar electrical conductivity, excellent thermal conductivity, and resistance to strong acid, highly basic.Research shows, is combined with polyolefin by CNT, makes respective character fully combine, and can prepare and have the machinery of excellence, conduction, the Multifunctional polyolefin/carbon nano tube compound material of the performance such as fire-retardant.The huge advantage that polyolefin/carbon nano tube composite material is potential, by the extensive concern of domestic and international researcher;
Although compared to common polymeric material, polyolefin/carbon nano tube material has the mechanical property of excellence, conduction/hot property, fire resistance, but yet suffers from the biggest gap compared with traditional metal materials.What is particularly worth mentioning is that polyolefinic durability is poor, easy oxidative degradation, the most greatly shorten the service life of material and cause a large amount of environmental debris.Therefore, study the oxidative degradation behavior of polyolefin/carbon nano tube composite material, and then the thermo-oxidative stability strengthening polyolefin/carbon nano tube composite material has important practical significance.On the other hand, the winding agglomeration that CNT is serious in polymeric matrix is not allowed to avoid.Correspondingly, how CNT is carried out surface modified, improve its dispersibility in polymeric matrix and compatibility, thus the final performance strengthening composite is always the problem that academia is paid close attention to jointly with industrial quarters.
Although CNT has many excellent performances, but due to its be insoluble in water and organic molten not, and dispersibility in polymeric matrix and the most very poor with the compatibility of matrix, significantly limit its application and using effect.In order to make CNT give full play to its advantage in the polymeric material, CNT must be dispersed in polymeric matrix to strengthen the interface interaction power of itself and polymer.For reaching this purpose, the preparation method of Polymer/carbon Nanotubes Composites is varied, the most relatively conventional has solution mixing method, dissolves blending method and situ aggregation method.Especially, for non-polar polyolefinic material, mainly based on melt blending.At present, improving polyene through hot oxygen main method qualitatively is to add thermal oxidation stabilizer in poly-coaleum matrix, i.e. antioxidant, free radical and hydroperoxides are two class noxious products during polymer accelerated oxidation, if this two classes intermediate product can be eliminated or suppress, can stop or slow down the Auto-oxidation reaction of polymer.Accordingly, main use two big kind antioxidants in polyolefin.Primary antioxidant is also referred to as chain termination and carves, energy Trapped free radical so that it is be no longer participate in oxidation cycle;Auxiliary anti-oxidant is hydrogen peroxide decomposition agent, the hydroperoxides ROOH that energy decomposing copolymer produces during autoxidation so that it is become stable compound.It is noted that the addition of antioxidant only makes oxidation rate reduce, and do not change autoxidation course;
Although Industrial polyolefin antioxidant kind is more, but owing to polyolefin processing temperature is higher, and along with the expansion of its range, people are more and more higher to the requirement of polyolefinic thermo-oxidative stability, and polyolefin antioxidant is also had higher requirement by this.
Summary of the invention
The object of the invention is contemplated to make up the defect of prior art, it is provided that a kind of CNT strengthens antioxidation GSZ and preparation method thereof.
The present invention is achieved by the following technical solutions:
A kind of CNT strengthens antioxidation GSZ, and it is made up of the raw material of following weight parts:
Calcium acetylacetonate 1.6-2, alkenyl succinic anhydride 0.7-1, barium stearate 1-2, lithium aluminium hydride reduction 0.1-0.3, DMAP 0.3-1, antioxidant 1010 0.4-1, multi-walled carbon nano-tubes 10-15, irgasfos 168 0.6-1, PPI 10-17, tert-butyl acrylate 6-8, high density polyethylene (HDPE) 140-160, bis-phenol a diglycidyl ether 0.3-1,2-mercapto benzimidazole 0.6-1, dibutyl maleate 4-6, aphthenic acids lithium 0.4-1.
A kind of described CNT strengthens the preparation method of antioxidation GSZ, comprises the following steps:
(1) above-mentioned 2-mercapto benzimidazole is joined in the dehydrated alcohol of its weight 10-13 times, stir, add alkenyl succinic anhydride, rise high-temperature and be 60-70 DEG C, insulation reaction 20-30 minute, add aforesaid propylene tert-butyl acrylate, stirring, to room temperature, obtains modified monomer;
(2) above-mentioned PPI is joined in the absolute methanol of its weight 70-80 times, drip above-mentioned modified monomer in a nitrogen atmosphere, drip complete rear chamber temperature to stir 20-25 hour, it is vacuum dried 24-30 hour at 36-40 DEG C, join in the oxolane of its weight 20-30 times, stir, a must be expected;
(3) above-mentioned lithium aluminium hydride reduction is joined in the anhydrous tetrahydro furan of its weight 80-90 times, be sent in ice-water bath, be passed through nitrogen protection; drip above-mentioned material a; stirring reaction 50-60 minute, discharging, it is incubated at room temperature stirring 100-120 minute; add mixed system weight 0.8-1%, 2-3 DEG C, the sodium hydroxide solution of 6-8%; stir, filter after drying with anhydrous magnesium sulfate, filtrate decompression is pumped solvent; it is vacuum dried 20-25 hour, obtains hydroxylating polyhydric alcohol;
(4) take above-mentioned multi-walled carbon nano-tubes, join in its weight 30-40 times, 96-98% sulfuric acid solution, ultrasonic 10-17 minute, filter, precipitation is washed 2-3 time, mixes with barium stearate, aphthenic acids lithium, at 50-60 DEG C, insulated and stirred mixes 10-15 minute, obtains acidifying multi-walled carbon nano-tubes;
(5) take above-mentioned multi-walled carbon nano-tube, join in the thionyl chloride of its weight 100-110 times, ultrasonic 20-30 minute; it is passed through nitrogen protection; insulated and stirred 20-24 hour at 60-70 DEG C, decompression pumps thionyl chloride, joins in the oxolane of its weight 60-70 times; above-mentioned hydroxylating polyhydric alcohol is added under stirring condition; stirring reaction 46-50 hour, sucking filtration, by filter cake absolute ethanol washing 3-4 time; at 60-65 DEG C, it is dried under vacuum to constant weight, obtains polyhydric alcohol modified carbon nano-tube;
(6) above-mentioned polyalcohol modified CNT is joined in the oxolane of its weight 170-200 times; add above-mentioned DMAP, triethylamine, antioxidant 1010, irgasfos 168; under nitrogen protection; insulated and stirred 47-50 hour at 60-65 DEG C, adds above-mentioned calcium acetylacetonate, stirs; sucking filtration; by filter cake successively with dichloromethane, absolute ethanol washing, it is placed in the drying baker of 60-70 DEG C and is dried to constant weight, obtain antioxidation modified carbon nano-tube;
(7) above-mentioned antioxidation modified carbon nano-tube is mixed with bis-phenol a diglycidyl ether, dibutyl maleate, insulated and stirred 10-17 minute at 60-70 DEG C, add and remain each raw material, stir, input screw extruder melt extrudes, melt is made sheet material by three roll squeezer roll-ins, then through punching, stretching, to obtain final product.
The invention have the advantage that the present invention obtains, by PPI, tert-butyl acrylate generation additive reaction, the dendrimer that end is the tert-butyl ester, it is hydrogenated the reduction of aluminum lithium subsequently, obtain hydroxylating polyhydric alcohol, then with multi-wall carbon nano-tube tube reaction, obtain polyalcohol modified CNT, then antioxidant is occurred with it condensation reaction, forms stable ester bond, obtain with polyhydric alcohol as bridge molecule, antioxidant grafting carbon nano-tube material;
nullThe present invention is during polymer thermo-oxidative ageing,The hindered phenol antioxygen 1010 of CNT framing structure and surface grafting thereof plays primary antioxidant effect,Remove the free radical that polymer autoxidation produces,Such as alkyl diradical、Peroxy radical etc.,Wherein hindered phenol antioxygen breaks hydrogen donor as chain,Peroxy radical R00-can be converted into hydroperoxides ROOH,And self forms stable free radical,But the hydroperoxides ROOH generated easily grows alkoxy free group R0-and hydroxyl radical free radical-OH in the way of homolysis,Cause further and promote polymer oxidative chain reactions,And in the presence of phosphite ester kind antioxidant 168,Its reducible hydroperoxides ROOH,And self generates stable compound,Thus the free radical avoiding ROOH decomposes,Accordingly,The antioxidant 1010 that the present invention adds、Irgasfos 168 is combined,Alkyl diradical can be eliminated、Peroxy radical、Alkoxy free group and hydroperoxides,It is substantially reduced the free-radical contents participating in polymer autoxidation chain reaction,Delay polymer Oxidative Degradation Process,Improve the antioxygenic property of finished-product material.
Detailed description of the invention
A kind of CNT strengthens antioxidation GSZ, and it is made up of the raw material of following weight parts:
Calcium acetylacetonate 1.6, alkenyl succinic anhydride 0.7, barium stearate 1, lithium aluminium hydride reduction 0.1,4 dimethylamino naphthyridine 0.3, antioxidant 1010 0.4, multi-walled carbon nano-tubes 10, irgasfos 168 0.6, PPI 10, tert-butyl acrylate 6, high density polyethylene (HDPE) 140, bis-phenol a diglycidyl ether 0.3,2 mercapto benzimidazole 0.6, dibutyl maleate 4, aphthenic acids lithium 0.4.
A kind of described CNT strengthens the preparation method of antioxidation GSZ, comprises the following steps:
(1) being joined by above-mentioned 2 mercapto benzimidazoles in the dehydrated alcohol of its weight 10 times, stir, add alkenyl succinic anhydride, rising high-temperature is 60 DEG C, insulation reaction 20 minutes, adds aforesaid propylene tert-butyl acrylate, and stirring, to room temperature, obtains modified monomer;
(2) above-mentioned PPI is joined in the absolute methanol of its weight 70 times, drip above-mentioned modified monomer in a nitrogen atmosphere, drip complete rear chamber temperature and stir 20 hours, it is vacuum dried 24 hours at 36 DEG C, join in the oxolane of its weight 20 times, stir, a must be expected;
(3) above-mentioned lithium aluminium hydride reduction is joined in the anhydrous tetrahydro furan of its weight 80 times, be sent in ice-water bath, be passed through nitrogen protection; drip above-mentioned material a; stirring reaction 50 minutes, discharging, it is incubated at room temperature stirring 100 minutes; add mixed system weight 0.8%, 2 DEG C, the sodium hydroxide solution of 6%; stir, filter after drying with anhydrous magnesium sulfate, filtrate decompression is pumped solvent; it is vacuum dried 20 hours, obtains hydroxylating polyhydric alcohol;
(4) take above-mentioned multi-walled carbon nano-tubes, join in its weight 30 times, the sulfuric acid solution of 96%, ultrasonic 10 minutes, filter, precipitation is washed 2 times, mixes with barium stearate, aphthenic acids lithium, at 50 DEG C, insulated and stirred mixes 10 minutes, obtains acidifying multi-walled carbon nano-tubes;
(5) take above-mentioned multi-walled carbon nano-tube, join in the thionyl chloride of its weight 100 times, ultrasonic 20 minutes; it is passed through nitrogen protection; insulated and stirred 20 hours at 60 DEG C, decompression pumps thionyl chloride, joins in the oxolane of its weight 60 times; above-mentioned hydroxylating polyhydric alcohol is added under stirring condition; stirring reaction 46 hours, sucking filtration, by filter cake absolute ethanol washing 3 times; at 60 DEG C, it is dried under vacuum to constant weight, obtains polyhydric alcohol modified carbon nano-tube;
(6) above-mentioned polyalcohol modified CNT is joined in the oxolane of its weight 170 times; add above-mentioned 4 dimethylamino naphthyridines, triethylamine, antioxidant 1010, irgasfos 168; under nitrogen protection; insulated and stirred 47 hours at 60 DEG C, add above-mentioned calcium acetylacetonate, stir; sucking filtration; by filter cake successively with dichloromethane, absolute ethanol washing, it is placed in the drying baker of 60 DEG C and is dried to constant weight, obtain antioxidation modified carbon nano-tube;
(7) above-mentioned antioxidation modified carbon nano-tube is mixed with bis-phenol a diglycidyl ether, dibutyl maleate, insulated and stirred 10 minutes at 60 DEG C, add and remain each raw material, stir, input screw extruder melt extrudes, melt is made sheet material by three roll squeezer roll-ins, then through punching, stretching, to obtain final product.
Outward appearance: smooth, bubble-free, without groove mark;
The tensile yield strength of grid sheet: 25MPa;
Weld tensile strength: >=200N/cm.
Claims (2)
1. a CNT strengthens antioxidation GSZ, it is characterised in that it is made up of the raw material of following weight parts:
Calcium acetylacetonate 1.6-2, alkenyl succinic anhydride 0.7-1, barium stearate 1-2, lithium aluminium hydride reduction 0.1-0.3, DMAP 0.3-1, antioxidant 1010 0.4-1, multi-walled carbon nano-tubes 10-15, irgasfos 168 0.6-1, PPI 10-17, tert-butyl acrylate 6-8, high density polyethylene (HDPE) 140-160, bis-phenol a diglycidyl ether 0.3-1,2-mercapto benzimidazole 0.6-1, dibutyl maleate 4-6, aphthenic acids lithium 0.4-1.
2. the preparation method of a CNT as claimed in claim 1 enhancing antioxidation GSZ, it is characterised in that comprise the following steps:
(1) above-mentioned 2-mercapto benzimidazole is joined in the dehydrated alcohol of its weight 10-13 times, stir, add alkenyl succinic anhydride, rise high-temperature and be 60-70 DEG C, insulation reaction 20-30 minute, add aforesaid propylene tert-butyl acrylate, stirring, to room temperature, obtains modified monomer;
(2) above-mentioned PPI is joined in the absolute methanol of its weight 70-80 times, drip above-mentioned modified monomer in a nitrogen atmosphere, drip complete rear chamber temperature to stir 20-25 hour, it is vacuum dried 24-30 hour at 36-40 DEG C, join in the oxolane of its weight 20-30 times, stir, a must be expected;
(3) above-mentioned lithium aluminium hydride reduction is joined in the anhydrous tetrahydro furan of its weight 80-90 times, be sent in ice-water bath, be passed through nitrogen protection; drip above-mentioned material a; stirring reaction 50-60 minute, discharging, it is incubated at room temperature stirring 100-120 minute; add mixed system weight 0.8-1%, 2-3 DEG C, the sodium hydroxide solution of 6-8%; stir, filter after drying with anhydrous magnesium sulfate, filtrate decompression is pumped solvent; it is vacuum dried 20-25 hour, obtains hydroxylating polyhydric alcohol;
(4) take above-mentioned multi-walled carbon nano-tubes, join in its weight 30-40 times, 96-98% sulfuric acid solution, ultrasonic 10-17 minute, filter, precipitation is washed 2-3 time, mixes with barium stearate, aphthenic acids lithium, at 50-60 DEG C, insulated and stirred mixes 10-15 minute, obtains acidifying multi-walled carbon nano-tubes;
(5) take above-mentioned multi-walled carbon nano-tube, join in the thionyl chloride of its weight 100-110 times, ultrasonic 20-30 minute; it is passed through nitrogen protection; insulated and stirred 20-24 hour at 60-70 DEG C, decompression pumps thionyl chloride, joins in the oxolane of its weight 60-70 times; above-mentioned hydroxylating polyhydric alcohol is added under stirring condition; stirring reaction 46-50 hour, sucking filtration, by filter cake absolute ethanol washing 3-4 time; at 60-65 DEG C, it is dried under vacuum to constant weight, obtains polyhydric alcohol modified carbon nano-tube;
(6) above-mentioned polyalcohol modified CNT is joined in the oxolane of its weight 170-200 times; add above-mentioned DMAP, triethylamine, antioxidant 1010, irgasfos 168; under nitrogen protection; insulated and stirred 47-50 hour at 60-65 DEG C, adds above-mentioned calcium acetylacetonate, stirs; sucking filtration; by filter cake successively with dichloromethane, absolute ethanol washing, it is placed in the drying baker of 60-70 DEG C and is dried to constant weight, obtain antioxidation modified carbon nano-tube;
(7) above-mentioned antioxidation modified carbon nano-tube is mixed with bis-phenol a diglycidyl ether, dibutyl maleate, insulated and stirred 10-17 minute at 60-70 DEG C, add and remain each raw material, stir, input screw extruder melt extrudes, melt is made sheet material by three roll squeezer roll-ins, then through punching, stretching, to obtain final product.
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