CN101255259A - Method for preparing polymethyl methyl acrylate montmorillonite nanocomposite - Google Patents
Method for preparing polymethyl methyl acrylate montmorillonite nanocomposite Download PDFInfo
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- CN101255259A CN101255259A CNA2007100187253A CN200710018725A CN101255259A CN 101255259 A CN101255259 A CN 101255259A CN A2007100187253 A CNA2007100187253 A CN A2007100187253A CN 200710018725 A CN200710018725 A CN 200710018725A CN 101255259 A CN101255259 A CN 101255259A
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Abstract
The invention provides a preparation method for polymethyl methacrylate montmorillonite nanomter composite material, comprising: preparing 0.5-7 parts by unit weight of montmorillonite with mineral content of above 90%; adding 1000-3000 parts of water; stirring until the montmorillonite fully expands; adding 100 parts of methyl methacrylate and continuously stirring until the stable dispersion liquid is formed; adding 5-7 parts of initiator and performing heating and polymerizing; filtering, cleaning, drying, grinding, screening by 200 mesh screen, putting into mould and hot briquetting.
Description
Technical field
The present invention relates to the preparation method of high molecular polymer based nano composite material, specifically is the preparation of wear resistance polymethyl methyl acrylate montmorillonite nanocomposite.
Background technology
Polymethylmethacrylate claims synthetic glass again, is one of best polymer materials of the transparency, has good weathering resistance, electrical insulating property and processing characteristics, but wears no resistance, and in use the surface easily is scratched.Chinese patent CN1837270 of the prior art (publication number), prepare the polymethyl methacrylate materials of surface abrasion resistance by titanium dioxide coating based nano film layer on the surface of polymethyl methacrylate materials, do not relate to the nano combined wear resistance polymethylmethacrylate for preparing by organic materials and inorganic materials.
Summary of the invention
The preparation method who the purpose of this invention is to provide a kind of polymethyl methyl acrylate montmorillonite nanocomposite.Be the preparation process of matrix material below.
(1) presses unit weight, prepare 0.5～7 part of polynite, join in 1000～3000 parts of water, be stirred to polynite and dissolve fully, expand;
(2) in solution, add 100 parts of methyl methacrylate monomers, continue to be stirred to the stable intercalation clay dispersion liquid of formation;
(3) continue in solution, to add 5～7 parts of initiators, the intensification polymerization;
(4) filtration, washing, drying.
(5) grind, cross 200 mesh sieves, make polymethyl methyl acrylate montmorillonite nanocomposite.
(6) (5) gained matrix material is put into mould, hot-forming;
(7) cooling naturally, the demoulding.
Among the present invention, the polynite content range is in the time of 4～5 parts, and the wear resistance of matrix material is best.Under metal to-metal contact and the water lubricating condition, its wear rate is respectively with 25%～35% and 55% of pure polymethylmethacrylate under the condition.And the matrix material frictional coefficient under DRY SLIDING that only adds the polynite of TJ-2 type improved less than 9%, and under all the other conditions, the frictional coefficient of matrix material all is better than polymethylmethacrylate.
Description of drawings
The graphic representation of the The friction coefficient polynite content of two kinds of polymethyl methyl acrylate montmorillonite nanocomposites when Fig. 1 is metal to-metal contact.
The wear rate of two kinds of polymethyl methyl acrylate montmorillonite nanocomposites was with the graphic representation of polynite content when Fig. 2 was metal to-metal contact.
The graphic representation of the The friction coefficient polynite content of two kinds of polymethyl methyl acrylate montmorillonite nanocomposites when Fig. 3 is water lubricating.
The wear rate of two kinds of polymethyl methyl acrylate montmorillonite nanocomposites was with the graphic representation of polynite content when Fig. 4 was water lubricating.
Embodiment
The preparation method of polymethyl methyl acrylate montmorillonite nanocomposite, wherein the mineral content of polynite is for containing more than 90%, and its preparation process is:
(1) presses unit weight, prepare 0.5～7 part of polynite, join in 1000～3000 parts of aqueous solution, carry out high-speed stirring, be stirred to polynite and dissolve fully, expand;
(2) in solution, add 100 parts of methyl methacrylate monomers, continue high-speed stirring, form stable intercalation clay dispersion liquid;
(3) continue in the solution 5～7 parts of adding initiators, initiator is Potassium Persulphate or ammonium persulphate, carries out high-speed stirring under 83 ℃, carries out polyreaction;
(4) filter at last, wash, drying.
(5) grind, 200 mesh sieves make polymethyl methyl acrylate montmorillonite nanocomposite.
(6) (5) gained matrix material is put into mould, 1.5 * 10
4Be warmed up to 160 ℃ with 2～3.2K/min under the N pressure;
(7) more than the insulation 1h;
(8) cooling naturally, the demoulding.
Initiator of the present invention is superoxide such as Potassium Persulphate or ammonium persulphate.
Its effect of dispersion medium that the present invention adopts is to promote the dispersion of polynite in polymer monomer, and its composition can be water, ethanol etc.
The used heat-up rate of polymethyl methyl acrylate montmorillonite nanocomposite moulding is 2～3.2K/min among the present invention.Heat-up rate is greater than 3.2K/min, and then the sample internal-external temperature difference is excessive, can't moulding.
The present invention is a raw material with the methyl methacrylate monomer of technical grade, and the polynite that is provided is typical layer silicate mineral, and its polynite content is respectively TJ-2 type and KH-V6 type more than 90%.
The raw material of preparation wear resistance polymethyl methyl acrylate montmorillonite nanocomposite by the unit weight umber is: 100 parts of acrylonitrile monemers, 0.5～7 part of polynite.When polynite content is lower than 0.5 part, wear resistance improves not obvious, and when content surpasses 6 parts, wear resistance obviously descends, and the forming ability variation.The relation of the friction and wear behavior of polymethyl methyl acrylate montmorillonite nanocomposite and polynite content can be better understood by accompanying drawing.
As shown in Figure 1 and Figure 2, the frictional coefficient of two kinds of polymethyl methyl acrylate montmorillonite nanocomposites and wear rate are with the graphic representation of polynite content during for metal to-metal contact, test is to carry out on M-2000 type friction wear testing machine, the mating plate material is a GCr15 bearing steel loop, its Rockwell hardness number reaches 63～65HRC, and outside dimension is 40mm.Specimen size is 30mm * 6mm * 7mm.Test conditions: metal to-metal contact, room temperature, friction pair sliding velocity are 0.43m/s, and contact load is 150N, and the friction cycle is 30min.Before the test, sample and test ring are all through 900
#Liquid honing and acetone clean, and the average roughness Ra of sample surfaces is 0.10～0.18 μ m.Moment of friction is by the data collecting system record, and is converted into frictional coefficient.With precision is the reading microscope measurement sample polishing scratch width of 0.01mm, and is converted into wear rate.5 on parallel sample is averaged as test-results.
As shown in Figure 3, Figure 4, the frictional coefficient of two kinds of polymethyl methyl acrylate montmorillonite nanocomposites and wear rate are with the graphic representation of polynite content during for water lubricating, test is to carry out on M-2000 type friction wear testing machine, the mating plate material is a GCr15 bearing steel loop, its Rockwell hardness number reaches 63～65HRC, and outside dimension is 40mm.Specimen size is 30mm * 6mm * 7mm.Test conditions: water lubricating (speed with 500mL/h drips distilled water), room temperature, friction pair sliding velocity are 0.43m/s, and contact load is 150N, and the friction cycle is 30min.Before the test, sample and test ring are all through 900
#Liquid honing and acetone clean, and the average roughness Ra of sample surfaces is 0.10～0.18 μ m.Moment of friction is by the data collecting system record, and is converted into frictional coefficient.With precision is the reading microscope measurement sample polishing scratch width of 0.01mm, and is converted into wear rate, and 5 on parallel sample is averaged as test-results.
By Fig. 1, Fig. 2, Fig. 3, Fig. 4 as can be known, among the present invention, the polynite content range is in the time of 4～5 parts, and the wear resistance of matrix material is best.Under metal to-metal contact and the water lubricating condition, its wear rate is respectively with 25%～35% and 55% of pure polymethylmethacrylate under the condition.And the matrix material frictional coefficient under DRY SLIDING that only adds the polynite of TJ-2 type improved less than 9%, and under all the other conditions, the frictional coefficient of matrix material all is better than polymethylmethacrylate.
Be exemplifying embodiment more specifically below:
Embodiment 1:
Taking by weighing the 1.2g polynite is scattered in the 600mL distilled water, vigorous stirring 2h adds the 20mL methyl methacrylate monomer, stirs 1h, continue to add the 1.4g initiator ammonium persulfate, be warming up to 83 ℃, continue to stir 8h, place 1h after-filtration, washing, drying, grind the back and cross 200 mesh sieves, obtain the polymethyl methacrylate/montmorillonite nano matrix material, get this matrix material of 12g and put into mould, at pressure 1.5 * 10
4Speed with 2K/min under the N is warming up to 160 ℃, and 1h is hot-forming in insulation, and after the room temperature cooling, the demoulding obtains the wear resistance polymethyl methyl acrylate montmorillonite nanocomposite.
Embodiment 2:
Taking by weighing the 0.2g polynite is scattered in the 200mL distilled water, vigorous stirring 1h adds the 20mL methyl methacrylate monomer, stirs 1h, continue to add the 1g initiator potassium persulfate, be warming up to 83 ℃, continue to stir 8h, place 1h after-filtration, washing, drying, grind the back and cross 200 mesh sieves, obtain the polymethyl methacrylate/montmorillonite nano matrix material, get this matrix material of 12g and put into mould, at pressure 1.5 * 10
4Speed with 3.2K/min under the N is warming up to 160 ℃, and 1h is hot-forming in insulation, and after the room temperature cooling, the demoulding obtains the wear resistance polymethyl methyl acrylate montmorillonite nanocomposite.
Embodiment 3:
Taking by weighing the 0.5g polynite is scattered in the 300mL distilled water, vigorous stirring 1h adds the 20mL methyl methacrylate monomer, stirs 1h, continue to add the 1.1g initiator ammonium persulfate, be warming up to 83 ℃, continue to stir 8h, place 1h after-filtration, washing, drying, grind the back and cross 200 mesh sieves, obtain the polymethyl methacrylate/montmorillonite nano matrix material, get this matrix material of 12g and put into mould, at pressure 1.5 * 10
4Speed with 3K/min under the N is warming up to 160 ℃, and 1h is hot-forming in insulation, and after the room temperature cooling, the demoulding obtains the wear resistance polymethyl methyl acrylate montmorillonite nanocomposite.
Embodiment 1-4:
Taking by weighing the 0.8g polynite is scattered in the 400mL distilled water, vigorous stirring 1h adds the 20mL methyl methacrylate monomer, stirs 1h, continue to add the 1.2g initiator potassium persulfate, be warming up to 83 ℃, continue to stir 8h, place 1h after-filtration, washing, drying, grind the back and cross 200 mesh sieves, obtain the polymethyl methacrylate/montmorillonite nano matrix material, get this matrix material of 12g and put into mould, at pressure 1.5 * 10
4Speed with 2.6K/min under the N is warming up to 160 ℃, and 1h is hot-forming in insulation, and after the room temperature cooling, the demoulding obtains the wear resistance polymethyl methyl acrylate montmorillonite nanocomposite.
Claims (1)
1, polymethyl methyl acrylate montmorillonite nanocomposite preparation method, wherein the mineral content of polynite is for containing more than 90%, and preparation is characterised in that:
(1) with 0.5～7 part of polynite, join in 1000～3000 parts of aqueous solution, be stirred to polynite and dissolve fully, expand;
(2) in solution, add 100 parts of methyl methacrylate monomers, continue high-speed stirring, form stable intercalation clay dispersion liquid;
(3) continue in solution, to add 5～7 parts of initiators, the intensification polymerization;
(4) filter, wash, drying, ground 200 mesh sieves, polymethyl methyl acrylate montmorillonite nanocomposite;
(5) above-mentioned matrix material is put into mould, hot-forming;
(6) cooling naturally, the demoulding.
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| Application Number | Priority Date | Filing Date | Title |
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| CNA2007100187253A CN101255259A (en) | 2007-09-11 | 2007-09-11 | Method for preparing polymethyl methyl acrylate montmorillonite nanocomposite |
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| CNA2007100187253A CN101255259A (en) | 2007-09-11 | 2007-09-11 | Method for preparing polymethyl methyl acrylate montmorillonite nanocomposite |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102134363A (en) * | 2011-04-12 | 2011-07-27 | 中国科学院合肥物质科学研究院 | Polymethylmethacrylate nanometer composite material and preparation method thereof |
| CN102485805A (en) * | 2010-12-02 | 2012-06-06 | 广东高科达科技实业有限公司 | Method for preparing modified nano montmorillonite |
| CN105197951A (en) * | 2015-08-17 | 2015-12-30 | 四川大学 | Method for preparing montmorillonoid filler through polymer implosion |
| CN108774395A (en) * | 2018-06-06 | 2018-11-09 | 汪涛 | A kind of processing method of flame retarding type thermoplastic polyurethane elastomer |
-
2007
- 2007-09-11 CN CNA2007100187253A patent/CN101255259A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102485805A (en) * | 2010-12-02 | 2012-06-06 | 广东高科达科技实业有限公司 | Method for preparing modified nano montmorillonite |
| CN102134363A (en) * | 2011-04-12 | 2011-07-27 | 中国科学院合肥物质科学研究院 | Polymethylmethacrylate nanometer composite material and preparation method thereof |
| CN102134363B (en) * | 2011-04-12 | 2012-11-21 | 中国科学院合肥物质科学研究院 | Polymethylmethacrylate nanometer composite material and preparation method thereof |
| CN105197951A (en) * | 2015-08-17 | 2015-12-30 | 四川大学 | Method for preparing montmorillonoid filler through polymer implosion |
| CN108774395A (en) * | 2018-06-06 | 2018-11-09 | 汪涛 | A kind of processing method of flame retarding type thermoplastic polyurethane elastomer |
| CN108774395B (en) * | 2018-06-06 | 2020-10-16 | 栖霞市兴邦新材料科技有限公司 | Processing method of flame-retardant thermoplastic polyurethane elastomer |
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Open date: 20080903 |