CN104592803A - Organosilicone modified phase-changing microcapsule and preparation method of microcapsule - Google Patents
Organosilicone modified phase-changing microcapsule and preparation method of microcapsule Download PDFInfo
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- C—CHEMISTRY; METALLURGY
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- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F212/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an aromatic carbocyclic ring
- C08F212/02—Monomers containing only one unsaturated aliphatic radical
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- B01J13/00—Colloid chemistry, e.g. the production of colloidal materials or their solutions, not otherwise provided for; Making microcapsules or microballoons
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- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
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Abstract
The invention relates to an organosilicone modified phase-changing microcapsule and a preparation method of the microcapsule. The microcapsule can be applied to a building coating. The microcapsule is prepared from the following raw materials in parts by weight by the following steps: 1) pre-emulsification: namely adding 50-70 parts of paraffin, 14-19 parts of styrene, 0.3-1 part of an organosilicone modifier, 5-8.5 parts of methacrylic acid, 55-82 parts of deionized water, 2-4 parts of an anionic emulsifier, 0.5-1.5 parts of a nonionic emulsifier and 0.25-1 part of an initiator into a pre-emulsification reactor, dispersing at a rotating speed of 800-1200r/min at a temperature which is 3-15 DEG C higher than the melting point of paraffin, and pre-emulsifying for 10-40 minutes to obtain a pre-emulsion; 2) carrying out emulsion polymerization reaction; and 3) carrying out post-treatment. The stability of the phase-changing microcapsule polymer emulsion can be improved, colliding agglomeration among phase-changing microcapsule emulsion particles is reduced, and the dispersibility of the emulsion particles in a coating is improved.
Description
Technical field
The present invention relates to a kind of phase-change microcapsule and preparation method thereof, particularly organic-silicon-modified phase-change microcapsule of one and preparation method thereof, can be applicable to building coating, belongs to functional technical field of phase-change energy storage.
Background technology
Along with the development of society and the progress of science, the energy becomes the large obstacle hindering human development progress, improve the emphasis that energy utilization rate has become people's Recent study, phase change material is widely used as a kind of hot storage medium improving energy utilization rate, its cardinal principle utilizes phase change material absorb in phase transition process and discharge a large amount of latent heat, temperature control and energy-conservation object can be reached, but this kind of material is in phase transition process, particularly when liquid phase, be easy to flowing, be restricted in actual applications.
At 20 century 70s, along with the maturation of microcapsulary, phase-change microcapsule technology obtains development and application.Phase-change microcapsule is the particle wrapped up by phase change material with polymer materials that is natural or synthesis, thus avoids the contact of phase change material and other materials.Phase-change microcapsule is made up of cyst wall and capsule-core two portions, and capsule-core is phase change material, and common solid-liquid phase change material has crystalline hydrate salt, eutectic salt hydrate, paraffin class, polyoxyethylene glycol, straight-chain paraffin, fatty acid etc.Cyst wall is generally high molecular polymer, and what normal selection was conventional has polyureas, polymeric amide, urea-formaldehyde resin, melamine formaldehyde resin, urethane or their compound system.
In recent years, existing a large amount of report discloses phase-change microcapsule and technology of preparing thereof.2004, the people such as patent CN1513938A Wang Lixin adopted melamine formaldehyde resin to be wall material, and select direct-connected alkane, fatty alcohol and organic esters are phase change material, have obtained phase-change microcapsule material.2006, the patent CN1903971A Liu Yong people such as to stand erect adopted the method directly preparing emulsion in alkaline carbamide performed polymer, controls the shell speed of growth prepare phase-change microcapsule by controlling temperature of reaction.2013, patent CN103468222A is seductive and bewitching waited people to use 46
#paraffin, liquid paraffin, lauryl alcohol and butyl stearate are the core of low temperature phase change, with methyl methacrylate, methacrylic acid, acrylic acid polymkeric substance for wall material, have synthesized a kind of microcapsule of low temperature phase change.2014, the patent CN103937461A people from side such as to benefit the nation took methyl methacrylate as wall material, with the mixture of Octadecane and n-hexadecane for core has synthesized a kind of phase-change microcapsule of clothes temperature adjustment.
In the preparation method of report phase-change microcapsule, most with melamine resin, urea-formaldehyde resin, resol is wall material, and by its Effect of Materials, in cyst wall, removing residue formaldehyde becomes inevitable.In addition, adopt the method for letex polymerization, conventional emulsifier used is attached to emulsion particle surface in the mode of physical adsorption, thus realizes the stability to emulsion system, this conventional emulsion agent molecule easily by external environment affect generation desorb, cause emulsion particle collide cohesion.And it is normal containing APE (alkylphenol polyoxyethylene) and formaldehyde objectionable impurities in emulsifying agent, in addition, with the polymkeric substance of methyl methacrylate, methacrylic acid for wall material, though not containing objectionable impuritiess such as formaldehyde, but the poor heat stability of phase-change microcapsule, resistance to elevated temperatures is poor, and resistance to acids and bases is poor.
Summary of the invention
In order to solve the above-mentioned problems in the prior art, the invention provides a kind of organic-silicon-modified phase-change microcapsule and preparation method thereof, organic-silicon-modified phase-change microcapsule prepared by the present invention can improve the stability of phase-change microcapsule polymer emulsion, reduce the collision cohesion between phase-change microcapsule emulsion particle, improve the dispersiveness of emulsion particle in coating.In addition, also there is outstanding weathering resistance, make phase-change microcapsule have satisfactory stability and resistance to acids and bases.
Technical solution of the present invention is as follows:
One) scheme one:
A kind of organic-silicon-modified phase-change microcapsule, it is prepared from according to following step of sequentially carrying out by the raw material of following weight proportioning:
1) pre-emulsification:
50-70 part paraffin, 14-19 part vinylbenzene, 0.3-1 part organosilicon modifier, 5-8.5 part methacrylic acid, 55-82 part deionized water, 2-4 part anionic emulsifier, 0.5-1.5 part nonionic emulsifying agent and 0.25-1 part initiator are joined in pre-emulsification reactor, higher than at the temperature of melting point of paraffin wax 3-15 DEG C, under the dispersion of 800-1200r/min rotating speed, pre-emulsification 10-40 minute, obtains pre-emulsion;
2) emulsion polymerization:
30-45 part deionized water is added in polymerization reactor, being heated to 78 DEG C-82 DEG C, by step 1) pre-emulsion that obtains is added drop-wise in polymerization reactor, drips 50-100 minute, at 78 DEG C of-82 DEG C of temperature, react 5.5-6.5 hour afterwards, obtain polymer emulsion;
3) aftertreatment:
Filtering separation step 2) polymer emulsion that obtains, after washing 2-5 time, namely obtain organic-silicon-modified phase-change microcapsule;
Described melting point of paraffin wax is 30-60 DEG C.
Described organosilicon modifier is containing the one in the siloxanes of single methacryloxy functional side group, vinyltrimethoxy silane, γ-methacryloxypropyl trimethoxy silane.
Described nonionic emulsifying agent adopts the polyethenoxy ether class containing propenyl.
Described cationic emulsifier adopts the salt containing propenyl.
Described initiator adopts the one in Diisopropyl azodicarboxylate, benzoyl peroxide, 2,2'-Azobis(2,4-dimethylvaleronitrile), ammonium persulphate, Potassium Persulphate.
Two) scheme two: a kind of preparation method for the preparation of the organic-silicon-modified phase-change microcapsule described in scheme one, the method comprises the step that next coming in order carry out:
1) pre-emulsification:
50-70 part paraffin, 14-19 part vinylbenzene, 0.3-1 part organosilicon modifier, 5-8.5 part methacrylic acid, 55-82 part deionized water, 2-4 part anionic emulsifier, 0.5-1.5 part nonionic emulsifying agent and 0.25-1 part initiator are joined in pre-emulsification reactor, higher than at the temperature of melting point of paraffin wax 3-15 DEG C, under the dispersion of 800-1200r/min rotating speed, pre-emulsification 10-40 minute, obtains pre-emulsion;
2) emulsion polymerization:
30-45 part deionized water is added in polymerization reactor, being heated to 78 DEG C-82 DEG C, by step 1) pre-emulsion that obtains is added drop-wise in polymerization reactor, drips 50-100 minute, at 78 DEG C of-82 DEG C of temperature, react 5.5-6.5 hour afterwards, obtain polymer emulsion;
3) aftertreatment:
Filtering separation step 2) polymer emulsion that obtains, after washing 2-5 time, namely obtain organic-silicon-modified phase-change microcapsule;
Described melting point of paraffin wax is 30-60 DEG C.
Inventive principle of the present invention is as follows:
The present invention is with vinylbenzene, methacrylic acid, organosilicon modifier is monomer, with the salt containing propenyl and containing the Soxylat A 25-7 of propenyl for emulsifying agent, adopt the method for letex polymerization, vinylbenzene in reaction process, methacrylic acid, organosilicon modifier moves to water-direction, oily interface, synthetic polymer, successfully wrap up phase change material paraffin, the anionic emulsifier that organic-silicon-modified phase-change microcapsule of the present invention is selected and the functional group that nonionic emulsifying agent contains can directly and monomer reaction, greatly improve the stability of polymer emulsion, decrease the collision cohesion between emulsion particle, when applying in coating, in the middle of coating, promoter action is dispersed with to phase-change microcapsule.
The cyst material of microcapsule is formed by vinylbenzene and methacrylic polymeric, not containing formaldehyde, and environmental protection more compared with traditional urea-formaldehyde resin, resol cyst wall.Adding organosilicon modifier carries out organic-silicon-modified to cyst material, adds the dispersiveness of microcapsule, improves the thermal stability of cyst wall, weathering resistance, high thermal resistance and acid-proof alkaline.
The present invention compared with prior art, has the following advantages:
Organic-silicon-modified phase-change microcapsule prepared by the present invention is not containing formaldehyde, adopt polymerisable emulsifying agent, polymerisable emulsifier itself both can play emulsifying agent in letex polymerization, polymerization process can be participated in again, itself and polymerization reaction monomer are with covalent bonds, therefore greatly can improve the stability of polymer emulsion, decrease the collision cohesion between emulsion particle, improve the dispersiveness of emulsion particle in coating.In addition, the present invention adopts organosilicon to the modification of phase-change microcapsule wall material, due to the bond energy that Si-O key is very high, outstanding weathering resistance, makes phase-change microcapsule have satisfactory stability and resistance to acids and bases.
1) phase-change microcapsule prepared of the present invention, cyst material is formed by vinylbenzene and methacrylic polymeric, not containing formaldehyde, and with organic-silicon-modified, improves the thermal stability of cyst wall, weathering resistance, high thermal resistance and acid-proof alkaline.
2) phase-change microcapsule that prepared by the present invention adopts the environment-friendly type emulsifying agent that can participate in being polymerized, emulsifying agent participates in the polymerization process of monomer, greatly improve the stability of polymer emulsion, decrease the reunion between phase-change microcapsule, improve the dispersing property of phase-change microcapsule in coating.
3) phase-change microcapsule prepared of the present invention, preparation technology is simple, and production efficiency is high, more efficiently.
4) the phase-change microcapsule particle diameter prepared is at 1-5um, can directly add in building coating, do not affect the film effect of coating, oil-proof, microcapsule stability is good, and resistance to acids and bases is good, can substantially increase the heat preservation and insulation of coating, also can be applicable to field of textiles, all respects such as military field.
5) solid content that the present invention prepares gained emulsion can reach more than 50%, and in phase-change microcapsule, core accounts for microcapsule proportion up to more than 70%, and greatly enhance productivity and the heat-insulating property of microcapsule, energy-conserving and environment-protective more, are widely used.
Embodiment
Below in conjunction with embodiment, embodiment, content of the present invention is described in detail:
(1) embodiment
A kind of organic-silicon-modified phase-change microcapsule, it is prepared from according to following step of sequentially carrying out by the raw material of following weight proportioning:
1) pre-emulsification:
50-70 part paraffin, 14-19 part vinylbenzene, 0.3-1 part organosilicon modifier, 5-8.5 part methacrylic acid, 55-82 part deionized water, 2-4 part anionic emulsifier, 0.5-1.5 part nonionic emulsifying agent and 0.25-1 part initiator are joined in pre-emulsification reactor, higher than at the temperature of melting point of paraffin wax 3-15 DEG C, under the dispersion of 800-1200r/min rotating speed, pre-emulsification 10-40 minute, obtains pre-emulsion;
2) emulsion polymerization:
30-45 part deionized water is added in polymerization reactor, being heated to 78 DEG C-82 DEG C, by step 1) pre-emulsion that obtains is added drop-wise in polymerization reactor, drips 50-100 minute, at 78 DEG C of-82 DEG C of temperature, react 5.5-6.5 hour afterwards, obtain polymer emulsion;
3) aftertreatment:
Filtering separation step 2) polymer emulsion that obtains, after washing 2-5 time, namely obtain organic-silicon-modified phase-change microcapsule;
Described melting point of paraffin wax is 30-60 DEG C.
(2) embodiment:
Embodiment 1
A kind of organic-silicon-modified phase-change microcapsule, it is prepared from according to following step of sequentially carrying out by the raw material of following weight proportioning:
1) pre-emulsification:
55 parts of paraffin, 18.55 parts of vinylbenzene, 0.5 part of organic-silicon-modified additive of DOW CORNING 32,6.35 parts of methacrylic acids, 60 parts of deionized waters, 3.1 parts of propenyl ether sulfonate, 1.18 parts of propenyl Soxylat A 25-7s and 0.5 part of Diisopropyl azodicarboxylate are joined in pre-emulsification reactor, heating in water bath to 45 DEG C, under the dispersion of 900r/min rotating speed, pre-emulsification 20 minutes, obtains pre-emulsion;
2) emulsion polymerization:
In polymerization reactor, adding 30 parts of deionized waters, be heated to 80 DEG C, by step 1) pre-emulsion that obtains is added drop-wise in polymerization reactor, and drip 80 minutes, react 6 hours at 80 DEG C of temperature afterwards, obtain polymer emulsion;
3) aftertreatment:
Filtering separation step 2) polymer emulsion that obtains, after washing 2-5 time, namely obtain organic-silicon-modified phase-change microcapsule;
Described melting point of paraffin wax is 37 DEG C.
Embodiment 2
A kind of organic-silicon-modified phase-change microcapsule, it is prepared from according to following step of sequentially carrying out by the raw material of following weight proportioning:
1) pre-emulsification:
70 parts of paraffin, 23.25 parts of vinylbenzene, the figure A-171 organo functional silanes advanced in years of 1 part, 8.08 parts of methacrylic acids, 82 parts of deionized waters, 4.0 parts of propenyl ether sulfonate, 1.5 parts of propenyl Soxylat A 25-7s and 1 part of Diisopropyl azodicarboxylate are joined in pre-emulsification reactor, heating in water bath to 50 DEG C, under the dispersion of 900r/min rotating speed, pre-emulsification 20 minutes, obtains pre-emulsion;
2) emulsion polymerization:
Adding 44 parts of deionized waters in the reactor, be heated to 80 DEG C, by step 1) pre-emulsion that obtains is added drop-wise in reactor, and drip 100 minutes, react 6 hours at 80 DEG C of temperature afterwards, obtain polymer emulsion;
3) aftertreatment:
Filtering separation step 2) polymer emulsion that obtains, after washing 2-5 time, namely obtain organic-silicon-modified phase-change microcapsule;
Described melting point of paraffin wax is 42 DEG C.
Embodiment 3
A kind of organic-silicon-modified phase-change microcapsule, it is prepared from according to following step of sequentially carrying out by the raw material of following weight proportioning:
1) pre-emulsification:
50 parts of paraffin, 15.57 parts of vinylbenzene, the figure A-174NT organo functional silanes advanced in years of 0.3 part, 5.37 parts of methacrylic acids, 54 parts of deionized waters, 3.5 parts of propenyl ether sulfonate, 0.8 part of propenyl Soxylat A 25-7 and 0.25 part of benzoyl peroxide are joined in pre-emulsification reactor, heating in water bath to 45 DEG C, under the dispersion of 900r/min rotating speed, pre-emulsification 20 minutes, obtains pre-emulsion;
2) emulsion polymerization:
Adding 30 parts of deionized waters in the reactor, be heated to 80 DEG C, by step 1) pre-emulsion that obtains is added drop-wise in reactor, and drip 60 minutes, react 6 hours at 80 DEG C of temperature afterwards, obtain polymer emulsion;
3) aftertreatment:
Filtering separation step 2) polymer emulsion that obtains, after washing 2-5 time, namely obtain organic-silicon-modified phase-change microcapsule;
Described melting point of paraffin wax is 31 DEG C.
Embodiment 4
A kind of organic-silicon-modified phase-change microcapsule, it is prepared from according to following step of sequentially carrying out by the raw material of following weight proportioning:
1) pre-emulsification:
60 parts of paraffin, 19.5 parts of vinylbenzene, the figure A-174NT organo functional silanes advanced in years of 0.5 part, 8 parts of methacrylic acids, 55 parts of deionized waters, 2.8 parts of propenyl ether sulfonate, 1.5 parts of propenyl Soxylat A 25-7s and 0.5 part of benzoyl peroxide are joined in pre-emulsification reactor, heating in water bath to 50 DEG C, under the dispersion of 900r/min rotating speed, pre-emulsification 20 minutes, obtains pre-emulsion;
2) emulsion polymerization:
Adding 30 parts of deionized waters in the reactor, be heated to 80 DEG C, by step 1) pre-emulsion that obtains is added drop-wise in reactor, and drip 60 minutes, react 6 hours at 80 DEG C of temperature afterwards, obtain polymer emulsion;
3) aftertreatment:
Filtering separation step 2) polymer emulsion that obtains, after washing 2-5 time, namely obtain organic-silicon-modified phase-change microcapsule;
Described melting point of paraffin wax is 45 DEG C.
Embodiment 5
A kind of organic-silicon-modified phase-change microcapsule, it is prepared from according to following step of sequentially carrying out by the raw material of following weight proportioning:
1) pre-emulsification:
50 parts of paraffin, 19.5 parts of vinylbenzene, the organic-silicon-modified additive of DOW CORNING 32 of 0.5 part, 8 parts of methacrylic acids, 65 parts of deionized waters, 3.1 parts of propenyl ether sulfonate, 1.08 parts of propenyl Soxylat A 25-7s and 0.5 part of Diisopropyl azodicarboxylate are joined in pre-emulsification reactor, heating in water bath to 45 DEG C, under the dispersion of 900r/min rotating speed, pre-emulsification 20 minutes, obtains pre-emulsion;
2) emulsion polymerization:
Adding 35 parts of deionized waters in the reactor, be heated to 80 DEG C, by step 1) pre-emulsion that obtains is added drop-wise in reactor, and drip 60 minutes, react 6 hours at 80 DEG C of temperature afterwards, obtain polymer emulsion;
3) aftertreatment:
Filtering separation step 2) polymer emulsion that obtains, after washing 2-5 time, namely obtain organic-silicon-modified phase-change microcapsule;
Described melting point of paraffin wax is 31 DEG C.
In above each embodiment:
The organic-silicon-modified additive of the preferred DOW CORNING of described organosilicon modifier 32;
Described nonionic emulsifying agent propenyl Soxylat A 25-7 is preferably the ER-10 that ADEKA produces;
Described anionic emulsifier allyl ethers hydroxylpropyl sulfonate is preferably the COPS-1 that SOLVAY produces.
Described paraffin is preferably the paraffin that Runzhou, Zhenjiang Ze Zhong Wax special factory produces.
The preferred Aladdin reagent of described vinylbenzene, methacrylic acid, Diisopropyl azodicarboxylate.
The performance tests such as solid content, thermostability, enthalpy, size, resistance to acids and bases are carried out to prepared organic-silicon-modified phase-change microcapsule.
Solid content is tested: the quality accurately taking blank flat disk is M
0, take about 1g sample, the quality of sample disk is pacifically M altogether
2, sample is heated 1h in 120 ± 2 DEG C of baking ovens.After in moisture eliminator, be cooled to room temperature, again weigh the quality M altogether of remaining sample and flat disk
1, all weighings are accurately to 0.1mg.
The percentage ratio (X) of solid content is calculated as follows:
X＝100×(M1-M0)/(M2-M0)
Measure twice, measurement result is averaged, and report test result is to a decimal.
Size measures: the size of observing microcapsule under a scanning electron microscope.
Heat enthalpy value measures: use differential scanning calorimeter (DSC) to test the heat enthalpy value of sample, test condition is: the sample accurately taking about 10mg, at N
2under atmosphere, select 10K/min temperature rate, probe temperature selects the useful range of-20 DEG C-100 DEG C.
Emulsion particle dispersiveness test: the placement phase-change microcapsule emulsion of 10 days of getting 30g joins in 100g finished product emulsion paint, stirs 30 minutes with the rotating speed of 900r/min.Get the emulsion paint sample after mixing, link plate grindometer does fineness test.
Phase-change microcapsule thermal stability is tested: use thermal gravimetric analyzer (TG) to test the heat decomposition temperature of sample, test condition is: the sample taking about 10mg, at N
2under atmosphere, select 10K/min temperature rise rate, probe temperature selects the useful range of 25 DEG C-600 DEG C.
Acid resistance is tested: in microcapsule emulsion, add hydrochloric acid regulate pH value to 3, place two days later, add about 1g sample, sample is put into 50 degrees Celsius of baking ovens 1 hour in flat disk, touch whether have oil leakage phenomenon after taking-up by feel.
Alkali resistance is tested: in microcapsule emulsion, add ammoniacal liquor regulate pH value to 10, place two days later, add about 1g sample, sample is put into 50 degrees Celsius of baking ovens 1 hour in flat disk, touch whether have oil leakage phenomenon after taking-up by feel.
Through the test to each embodiment, the detection data results of organic-silicon-modified phase-change microcapsule of the present invention is as shown in following table:
The experimental data of each embodiment test of table one---organic-silicon-modified phase-change microcapsule
Can obviously find out from table one, various embodiments of the present invention all have good thermal stability and resistance to acids and bases under difficult environmental conditions, and size distribution is all between 1-5um, and heat enthalpy value is high, and there is satisfactory stability and resistance to acids and bases, there is good using value.
In sum, the organic-silicon-modified phase-change microcapsule of various embodiments of the present invention has very high heat enthalpy value, therefore has good energy-storage property, has good thermal stability simultaneously.
Above-mentioned embodiment is just explained in detail technical scheme of the present invention; the present invention has more than and is only confined to above-described embodiment; those skilled in the art should be understood that; every improvement on basis of the present invention according to above-mentioned principle and spirit, substitute, all should within protection scope of the present invention.
Claims (6)
1. an organic-silicon-modified phase-change microcapsule, is characterized in that: it is prepared from according to following step of sequentially carrying out by the raw material of following weight proportioning:
1) pre-emulsification:
50-70 part paraffin, 14-19 part vinylbenzene, 0.3-1 part organosilicon modifier, 5-8.5 part methacrylic acid, 55-82 part deionized water, 2-4 part anionic emulsifier, 0.5-1.5 part nonionic emulsifying agent and 0.25-1 part initiator are joined in pre-emulsification reactor, higher than at the temperature of melting point of paraffin wax 3-15 DEG C, under the dispersion of 800-1200r/min rotating speed, pre-emulsification 10-40 minute, obtains pre-emulsion;
2) emulsion polymerization:
30-45 part deionized water is added in polymerization reactor, being heated to 78 DEG C-82 DEG C, by step 1) pre-emulsion that obtains is added drop-wise in polymerization reactor, drips 50-100 minute, at 78 DEG C of-82 DEG C of temperature, react 5.5-6.5 hour afterwards, obtain polymer emulsion;
3) aftertreatment:
Filtering separation step 2) polymer emulsion that obtains, after washing 2-5 time, namely obtain organic-silicon-modified phase-change microcapsule;
Described melting point of paraffin wax is 30-60 DEG C.
2. organic-silicon-modified phase-change microcapsule according to claim 1, is characterized in that:
Described organosilicon modifier is containing the one in the siloxanes of single methacryloxy functional side group, vinyltrimethoxy silane, γ-methacryloxypropyl trimethoxy silane.
3. organic-silicon-modified phase-change microcapsule according to claim 1, is characterized in that:
Described nonionic emulsifying agent adopts the polyethenoxy ether class containing propenyl.
4. organic-silicon-modified phase-change microcapsule according to claim 1, is characterized in that:
Described cationic emulsifier adopts the salt containing propenyl.
5. organic-silicon-modified phase-change microcapsule according to claim 1, is characterized in that:
Described initiator adopts the one in Diisopropyl azodicarboxylate, benzoyl peroxide, 2,2'-Azobis(2,4-dimethylvaleronitrile), ammonium persulphate, Potassium Persulphate.
6. for the preparation of a preparation method for the organic-silicon-modified phase-change microcapsule described in any one of claim 1-5, it is characterized in that: described organic-silicon-modified phase-change microcapsule is according to the following step preparation sequentially carried out:
1) pre-emulsification:
50-70 part paraffin, 14-19 part vinylbenzene, 0.3-1 part organosilicon modifier, 5-8.5 part methacrylic acid, 55-82 part deionized water, 2-4 part anionic emulsifier, 0.5-1.5 part nonionic emulsifying agent and 0.25-1 part initiator are joined in pre-emulsification reactor, higher than at the temperature of melting point of paraffin wax 3-15 DEG C, under the dispersion of 800-1200r/min rotating speed, pre-emulsification 10-40 minute, obtains pre-emulsion;
2) emulsion polymerization:
30-45 part deionized water is added in polymerization reactor, being heated to 78 DEG C-82 DEG C, by step 1) pre-emulsion that obtains is added drop-wise in polymerization reactor, drips 50-100 minute, at 78 DEG C of-82 DEG C of temperature, react 5.5-6.5 hour afterwards, obtain polymer emulsion;
3) aftertreatment:
Filtering separation step 2) polymer emulsion that obtains, after washing 2-5 time, namely obtain organic-silicon-modified phase-change microcapsule;
Described melting point of paraffin wax is 30-60 DEG C.
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