CN1279068C - Crosslinked core-shell structure nano-polymer microsphere and its preparation method - Google Patents
Crosslinked core-shell structure nano-polymer microsphere and its preparation method Download PDFInfo
- Publication number
- CN1279068C CN1279068C CN 200410056806 CN200410056806A CN1279068C CN 1279068 C CN1279068 C CN 1279068C CN 200410056806 CN200410056806 CN 200410056806 CN 200410056806 A CN200410056806 A CN 200410056806A CN 1279068 C CN1279068 C CN 1279068C
- Authority
- CN
- China
- Prior art keywords
- monomer
- shell
- monoolefine
- stratum nucleare
- olefin monomer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Graft Or Block Polymers (AREA)
- Polymerisation Methods In General (AREA)
Abstract
Crosslinked core-shell structure nano-polymer microsphere and method for making same belong to the polymer material technology field. In accordance with the present invention, in presence of wedding agents and initiating agents, a plurality of organic olefin hydrocarbon monomer are selected as raw materials to prepare the product thorough emulsion or suspension polymerization wherein water is selected as a medium; the product is of a core-shell structure with a particle diameter smaller than 100 nm, with inside of the cores and shells being crosslinked, and the cores and shells being connected therebetween through chemical bonds. By changing constitution and structure of cores and shells, in accordance with the present invention, nanometer polymer microballoons having soft-core-hard-shell or hard-core-soft-shell with different physical and chemical specific characters are obtained, with very high freedom at physical design selection. The present invention not only resolves the problem that the existing core-shell polymer microspheres don't possesses nanometer dimensions, but also resolves the problem that the existing cores and shells are often linear polymers, resulting in a more broad applications foreground at the nanometer technology field.
Description
Technical field
The present invention relates to nano polymer microspheres of a kind of cross-linked core-shell structure and preparation method thereof, belong to technical field of polymer materials.
Background technology
The polymer microsphere that preparation has a nucleocapsid structure has received the concern of more and more researchers in recent years.The polymer that is polymerized by the polymerisable monomer of different components can serve as the composition of core-shell particles center or shell, utilize these high molecular different qualities, can synthesize the soft nuclear duricrust with different physicochemical properties or the nano polymer microspheres of stone soft shell type.Simultaneously, embodied the theory of molecular designing during this is synthetic, not only the component of nuclear and shell can change as required, and its yardstick also can reach application aims by corresponding method control.This just Nano microsphere component and diversity structure and very high design freedom make it have very wide prospect in the research of novel material with in using.
Yet the technology of preparing in relevant this field mainly contained following deficiency in the past: at first forefathers generally are confined to micro-meter scale about the preparation of nucleocapsid polymer microsphere, particle diameter mostly is hundreds of nanometers to tens of microns, and bigger yardstick makes it lose the property that nanoparticle possessed; Secondly forefathers' synthetic nucleocapsid polymer microsphere general kernel or shell are linear macromolecule, and microballoon swelling ratio in solvent is very low, and good solubility-resistence energy and oil absorptiveness are also relatively poor.In addition, complex process, productive rate are low also is the important deficiency of relevant this area research of forefathers.Therefore the present invention is based on forming and the above defective of synthesis technique solution from yardstick, structure.
Summary of the invention
The purpose of this invention is to provide a kind of cross-linked core-shell structure nano polymer microsphere and preparation method thereof, this method is incited somebody to action in the past on the one hand, and the yardstick of polymer core-shell particles is reduced in the nanoscale scope, make the nuclear and the shell inside of product all form crosslinking structure simultaneously, thereby not only solved preparation and had the problem of nanoscale nucleocapsid latex particle, but also solved nucleocapsid latex particle good solubility-resistence and the relatively poor problem of oil absorbency in the past, finally can show various good properties in actual applications.The present invention can design nuclear and the composition of shell and structure, yardstick as required, thereby obtain various the have soft nuclear duricrust of different physicochemical properties and application value or the nanoparticles of stone soft shell type, on form and structure Design, have very high degree of freedom, greatly widened its Application Areas and application prospect.
The objective of the invention is to be achieved through the following technical solutions:
A kind of cross-linked core-shell structure nano polymer microsphere, it is characterized in that: this nano polymer microspheres has typical nucleocapsid structure, and nuclear is inner and the connection structure is all presented in shell inside, examine with shell between be connected by chemical bond, its particle diameter is less than 100nm; It is a raw material with following material, by being that the letex polymerization of medium or the method for suspension polymerization are prepared from water:
1) monoolefine monomer: 100 parts of the total mass meters of stratum nucleare monoolefine monomer and shell monoolefine monomer; Wherein stratum nucleare monoolefine monomer quality is between 30-70 part, and the shell monoolefine monomer is corresponding between 70-30 part;
2) multi-olefin monomer: stratum nucleare multi-olefin monomer and shell multi-olefin monomer total mass between 2-50 part, described stratum nucleare multi-olefin monomer and shell multi-olefin monomer the two all more than or equal to 1 part;
3) emulsifying agent: 2～7 parts;
4) initiator: 0.5～2 part.
Monoolefine of the present invention is meant the alpha-olefin that contains a carbon-carbon double bond (C=C) in the molecule, can be selected from vinylbenzene, vinylchlorid, vinyl cyanide, acrylate, the methacrylic ester one or more; Described Polyene Hydrocarbons material is meant the material that contains two or more carbon-carbon double bonds in the molecule, is selected from suitable divinyl, isobutyl diene, isoprene, Vinylstyrene, the trihydroxy methyl propane trimethyl acrylate one or more.And should guarantee that stratum nucleare monoolefine monomer and shell monoolefine monomer are incomplete same.
Emulsifying agent described in the present invention can adopt one or more in the following material:
A. cationic: as to comprise three C
1～18Alkyl methyl ammonium chloride, three C
1～18Alkyl methyl brometo de amonio, three C
1～18Alkyl benzyl ammonium chloride, three C
1～18Alkyl benzyl brometo de amonio or three C
1～18Alkyl methyl benzyl ammonium chloride, three C
1～18Alkyl ethylbenzylammonium chloride, three C
1～18Alkyl methyl benzyl brometo de amonio, three C
1～18Alkyl Ethylbenzyl brometo de amonio;
B. anionic: comprise C
12～18Sodium alkyl sulfate, C
12～18Alkylsurfuric acid potassium, C
12～18Alkyl sodium sulfonate, C
12～18Alkylsulphonic acid potassium, C
12～18Sodium alkyl benzene sulfonate, C
12～18Alkyl benzene sulphonate (ABS) potassium.
C. non-ionic type: comprise C
3～10Polyoxyethylene alkylphenol ether, C
2～18Fatty alcohol-polyoxyethylene ether, the single C of polyoxyethylene sorbitol
11～18Fatty acid ester or polyoxyethylene sorbitol three C
11～18Fatty acid ester, described polyoxyethylene number of repeat unit is 4～50.
Described initiator is meant can be under 40～95 ℃ of conditions, and also can produce free radical causes the water miscible persulfuric acid salt of olefinic monomer polymeric, hydroperoxide kind material or oil-soluble azo class, peroxide material to have 30～35kcal/mol ionic dissociation energy.Can be selected from Potassium Persulphate, ammonium persulphate, Diisopropyl azodicarboxylate or 2,2'-Azobis(2,4-dimethylvaleronitrile), or the redox system formed with ferrous salt, sulphite, thiosulphate respectively of hydrogen peroxide, dibenzoyl peroxide.
The preparation method of a kind of cross-linked core-shell structure nano polymer microsphere provided by the invention is characterized in that adopting emulsion polymerisation process, and this method is a raw material with following material:
Monoolefine monomer: 100 parts of the total mass meters of stratum nucleare monoolefine monomer and shell monoolefine monomer; Wherein stratum nucleare monoolefine monomer quality is between 30-70 part, and the shell monoolefine monomer is corresponding between 70-30 part;
Multi-olefin monomer: stratum nucleare multi-olefin monomer and shell multi-olefin monomer total mass between 2-50 part, described stratum nucleare multi-olefin monomer and shell multi-olefin monomer the two all more than or equal to 1 part;
Emulsifying agent: 2～7 parts;
Water soluble starter: 0.5～2 part;
The concrete processing step of this method is as follows:
(1) preparation of stratum nucleare:
(a) by the above-mentioned raw materials proportioning with the stratum nucleare multi-olefin monomer of the stratum nucleare monoolefine monomer of 30-70% and 30-70% mixed evenly put into to contain deionized water and emulsifying agent and be warming up in advance in 40 ℃～50 ℃ the reactor form uniform emulsion, in this reactor, add and account for the water soluble starter of total amount 20～80%, and make it to be warming up to 70 ℃～95 ℃ temperature range internal reaction 0.5～2 hour;
(b) evenly add in the above-mentioned system remaining stratum nucleare monoolefine monomer and remaining stratum nucleare multi-olefin monomer are mixed, 70 ℃～95 ℃ temperature range internal reactions 1～3 hour;
(2) preparation of shell:
(c) select for use the monoolefine monomer different as in shell monoolefine monomer and the reacted system of the mixed evenly adding step (b) of shell multi-olefin monomer according to described proportion of raw materials with the stratum nucleare monoolefine monomer, add the residue water soluble starter then, 70 ℃～95 ℃ temperature range internal reactions 1～3 hour;
(d) behind the cooling discharging, and after breakdown of emulsion, washing, drying and other steps are handled, can obtain the cross-linked core-shell structure nano polymer microsphere that the present invention proposes.
The present invention also provides the preparation method of another kind of cross-linked core-shell structure nano polymer microsphere, it is characterized in that adopting suspension polymerization to be prepared, and this method is a raw material with following material:
Monoolefine monomer: 100 parts of the total mass meters of stratum nucleare monoolefine monomer and shell monoolefine monomer; Wherein stratum nucleare monoolefine monomer quality is between 30-70 part, and the shell monoolefine monomer is corresponding between 70-30 part;
Multi-olefin monomer: stratum nucleare multi-olefin monomer and shell multi-olefin monomer total mass between 2-50 part, described stratum nucleare multi-olefin monomer and shell multi-olefin monomer the two all more than or equal to 1 part;
Emulsifying agent: 2～7 parts;
Oil-soluble initiator: 0.5～2 part;
The concrete processing step of this method is as follows:
(1) preparation of stratum nucleare:
(a) by the proportioning in the described raw material with the oil-soluble initiator of the stratum nucleare multi-olefin monomer of the stratum nucleare monoolefine monomer of 30-70%, 30-70% and 20-80% mixed evenly put into to contain deionized water and emulsifying agent and be warming up in advance in 40 ℃～50 ℃ the reactor form uniform milk sap, and make it to be warming up to 70 ℃～95 ℃ temperature range internal reaction 0.5～2 hour;
(b) evenly add in the above-mentioned system remaining stratum nucleare monoolefine monomer and remaining stratum nucleare multi-olefin monomer are mixed, 70 ℃～95 ℃ temperature range internal reactions 1～3 hour;
(2) preparation of shell:
(c) select for use the monoolefine monomer different as shell monoolefine monomer and shell multi-olefin monomer with remaining oil-soluble initiator is mixed evenly adds in the reacted system of step (b) by the proportioning in the described raw material, 70 ℃～95 ℃ temperature range internal reactions 1～3 hour with the stratum nucleare monoolefine monomer;
(d) behind the cooling discharging, and after breakdown of emulsion, washing, drying and other steps are handled, can obtain the cross-linked core-shell structure nano polymer microsphere that the present invention proposes.
Cross-linked core-shell structure nano polymer microsphere that the present invention proposes and preparation method thereof, under the condition that emulsifying agent and initiator exist by with water being the emulsion of medium or the polymer microsphere that suspension polymerization has obtained having nucleocapsid structure, nanoscale.Be connected with chemical bond between the cross-linked core-shell structure nano polymer microsphere of the present invention, stratum nucleare and shell, have very strong interface interaction; Nuclear all is crosslinked form with shell inside, not only solve preparation and had the problem of nanoscale nucleocapsid latex particle, but also solved in the past nucleocapsid emulsion particle daughter nucleus and shell mostly be simple linear polymer thereby good solubility-resistence can and all lower problem of oil absorptiveness, finally show various good properties in actual applications.Can design simultaneously the composition of nuclear and shell and structure, yardstick as required, thereby obtain various the have soft nuclear duricrust of different physicochemical properties and application value or the nano polymer microspheres of stone soft shell type, and place nucleocapsid structure for a long time and can not reverse, on form and structure Design, have very high degree of freedom.Overall yield of reaction and gel fraction are generally all more than 90%.In addition, preparation technology is simple to operate, easily realizes suitability for industrialized production, and the nano polymer microspheres of making can be preserved for a long time, also can be dried to pulverulence, is easy to store and use.The particle diameter of this cross-linked core-shell structure nano polymer microsphere has the property that nanoscale and nanoparticle possess all less than 100nm.These characteristics will make cross-linked core-shell structure nano polymer microsphere of the present invention have purposes widely in from now on nanometer material science and technical development.
Description of drawings
Fig. 1 (a): the electron micrograph of crosslinked soft nuclear duricrust nano-high molecule PBA/PMMA microballoon;
Fig. 1 (b): the electron micrograph of cross-linked hard soft shell nano-high molecule PS/PBA microballoon;
Fig. 2 (a): the grain size distribution curve of crosslinked soft nuclear duricrust nano-high molecule PBA/PMMA microballoon;
Fig. 2 (b): the grain size distribution curve of cross-linked hard soft shell nano-high molecule PS/PBA microballoon.
Embodiment
The invention will be further described below by embodiment, understands the present invention with further.
Embodiment 1: 70 parts of butyl acrylates (BA) are evenly mixed as the stratum nucleare multi-olefin monomer, stand-by as stratum nucleare monoolefine monomer and 7 parts of trihydroxy methyl propane trimethyl acrylates (TM).In the four-hole bottle that mechanical stirring, reflux condensing tube and thermometer are housed, add 360 parts of deionized waters, 4 parts of sodium laurylsulfonates (SDS) and 0.5 part of nonylphenol Soxylat A 25-7, be warming up to 50 ℃, add the uniform emulsion of 30% formation of the miscellany for preparing previously.Add 80% of the initiator solution that is made into by 0.5 part of water soluble starter ammonium persulphate and 72 parts of deionized waters then, temperature is risen to 82 ℃ of reactions 1.5 hours.In system, drip the remaining mixture for preparing previously then, waited to drip afterreaction 1.5 hours.Add remaining initiator solution again, in system, drip mixture, dripped afterreaction 1.5 hours by 30 parts of methyl methacrylates (MMA) (as the shell monoolefine monomer) and 3 parts of trihydroxy methyl propane trimethyl acrylates (TM) (as the shell multi-olefin monomer).Be warming up to 90 ℃, continue reaction postcooling discharging in 0.5 hour.Part emulsion after the discharging gets the white powder product after breakdown of emulsion, washing, drying, another part emulsion places test tube, find that storage deposited phenomenon do not occur after 6 months, and electron microscopic observation finds that down the nucleocapsid structure of microsphere particles still keeps better, and reversal development does not take place.Overall yield of reaction 91.2% as calculated, uses the chloroform extracting after 12 hours exsiccant cross-linked core-shell structure nano polymer microsphere, and recording gel fraction is 93.7%, illustrates that nucleocapsid all exists with crosslinked form.Can be clear that the nucleocapsid structure of expection from Fig. 1 a (electromicroscopic photograph of PBA/PMMA), as can be seen, its median size is in 40～50nm scope for Fig. 2 a (the size distribution test of PBA/PMMA) simultaneously, and size distribution is very narrow.
Embodiment 2: 30 parts of vinylbenzene (St) are evenly mixed as the stratum nucleare multi-olefin monomer, stand-by as stratum nucleare monoolefine monomer and 3 parts of Vinylstyrenes (DVB).In the four-hole bottle that mechanical stirring, reflux condensing tube and thermometer are housed, add 360 parts of deionized waters, 6.5 parts of sodium laurylsulfonates (SDS) and 0.5 part of nonylphenol Soxylat A 25-7, be warming up to 50 ℃, add the uniform emulsion of 70% formation of the miscellany for preparing previously.Add 20% of the initiator solution that is made into by 0.5 part of water soluble starter ammonium persulphate and 72 parts of deionized waters then, temperature is risen to 82 ℃ of reactions 40 minutes.In system, add the remaining mixture for preparing previously then, continue reaction 1 hour.Add whole remaining initiator solutions again, in system, add mixture, reacted then 2 hours by 70 parts of butyl acrylates (BA) (as the shell monoolefine monomer) and 7 parts of Vinylstyrenes (DVB) (as the shell multi-olefin monomer).Be warming up to 90 ℃, continue reaction postcooling discharging in 0.5 hour.Part emulsion after the discharging gets the white powder product after breakdown of emulsion, washing, drying, another part emulsion places test tube, also find to store after 6 months deposited phenomenon not occur, and electron microscopic observation finds that down the nucleocapsid structure of microsphere particles still keeps better, and reversal development does not take place.Overall yield of reaction 94.1% as calculated, uses the chloroform extracting after 12 hours exsiccant cross-linked core-shell structure nano polymer microsphere, and recording gel fraction is 90.8%, also illustrates that nucleocapsid all exists with crosslinked form.Can be clear that the nucleocapsid structure of expection from Fig. 1 b (electromicroscopic photograph of PS/PBA), as can be seen, its median size is 40～50nm to Fig. 2 b (the size distribution test of PS/PBA) simultaneously, and size distribution is very narrow.
Embodiment 3: with the butyl acrylate of quality such as the stratum nucleare monoolefine monomer among the embodiment 1 becomes and the mixture of methyl acrylate, the shell monoolefine monomer is become the mixture of St and MMA, wherein MMA and St mass ratio are 2: 1, and all the other prescriptions are identical with example 1.The products therefrom performance index see Table 1.
Embodiment 4: the stratum nucleare monoolefine monomer among the embodiment 1 is become with the methyl acrylate of measuring, initiator amount increases to 2 parts, system temperature is 70 ℃, each following reaction times of step was respectively 2 hours, 3 hours, 3 hours, and save at last and be warming up to 90 ℃ and react 0.5 hour this step, all the other prescriptions are identical with embodiment 1.The products therefrom performance index see Table 1.
Embodiment 5: stratum nucleare multi-olefin monomer among the embodiment 2 and shell multi-olefin monomer are all become 1 part of N, the N-methylene diacrylamine, emulsifying agent adopts 2 parts of sodium lauryl sulphate, and system temperature is 95 ℃, and each following reaction times of step was respectively 0.5 hour, 1 hour, 1 hour.All the other prescriptions are identical with embodiment 2.The products therefrom performance index see Table 1.
Embodiment 6: 30 parts of vinylbenzene are evenly mixed as the stratum nucleare multi-olefin monomer, stand-by as stratum nucleare monoolefine monomer and 20 parts of isoprene.In the four-hole bottle that mechanical stirring, reflux condensing tube and thermometer are housed, add 360 parts of deionized waters, 2 parts of tripropyl ammonio methacrylates, be warming up to 50 ℃, the 70% and 0.1 part of oil-soluble initiator Diisopropyl azodicarboxylate that adds the miscellany for preparing previously forms uniform milk sap.Temperature is risen to 70 ℃ of reactions 2 hours.In system, add the mixture of remaining St and DVB then, continue reaction 3 hours.In system, add mixture again, reacted then 3 hours by whole remaining initiators, 70 parts of butyl acrylates (BA) (as the shell monoolefine monomer) and 30 parts of low polyhutadiene (as the shell multi-olefin monomer).Be warming up to 90 ℃, continue reaction postcooling discharging in 0.5 hour.The products therefrom performance index see Table 1.
Embodiment 7: the mixture that the emulsifying agent among the embodiment 6 is adopted 6 parts of tripropyl benzyl ammonium chlorides and 1 part of 12 fatty alcohol-polyoxyethylene ether, Diisopropyl azodicarboxylate is changed into the oil-soluble initiator dibenzoyl peroxide of measuring, system temperature is 95 ℃, each step time was respectively 0.5 hour, 1 hour, 1 hour, and all the other prescriptions are identical with embodiment 1.The products therefrom performance index see Table 1.
Embodiment 8: change the sodium laurylsulfonate among the embodiment 6 into Sodium dodecylbenzene sulfonate, the stratum nucleare monoolefine monomer changes 70 parts of BA into, the shell monoolefine monomer changes 30 parts of MMA into, and initiator is that all the other prescriptions are identical with embodiment 1 with the oil-soluble initiator Diisopropyl azodicarboxylate of amount.The products therefrom performance index see Table 1.
Embodiment 9: the emulsifying agent among the embodiment 6 is changed into the tripropyl methyl brometo de amonio of measuring, and initiator is 2 parts of oil-soluble initiator BPO, and all the other prescriptions are identical with embodiment 1.The products therefrom performance index see Table 1.
Comparative example 1: the preparation method is with example 1, but all do not add multi-olefin monomer among BA and the MMA, and the products therefrom performance index see Table 1.
Comparative example 2: the preparation method does not add emulsifying agent with example 2, system water oil content layer, and polymerization begins the back and block precipitation occurs.
More than the results are shown in Table shown in 1 of each example.
In above each embodiment, embodiment 1,2,3,4,5 belongs to method of emulsion polymerization, and embodiment 6,7,8,9 belongs to the method for suspension polymerization.
The present invention can summarize with other the specific form without prejudice to spirit of the present invention or principal character.Therefore, no matter from which point, above-mentioned embodiment of the present invention all can only be thought can not limit the present invention to explanation of the present invention, claims have been pointed out scope of the present invention, therefore, suitable with claims of the present invention contain with scope in any change, all should think to be included in the scope of claims.
The product property index of each embodiment of table 1
| Example 1 | Example 2 | Example 3 | Example 4 | Example 5 | Example 6 | Example 7 | Example 8 | Example 9 | Comparative example 1 | Comparative example 2 | |
| Fundamemtal phenomena | Well | Well | Well | Well | Well | Well | Well | Well | Well | A | Precipitation |
| Productive rate (%) | 91.2 | 94.1 | 89.6 | 95.2 | 93.5 | 87.4 | 92.6 | 95.5 | 90.0 | 88.4 | - |
| Gel fraction (%) | 93.7 | 90.8 | 94.3 | 98.7 | 86.2 | 91.7 | 96.1 | 92.8 | 94.6 | 0 | - |
| Particle diameter (nm) | 40～50 | 40～ 50 | 40～ 50 | 40～ 50 | 40～ 50 | 40～ 50 | 40～ 50 | 40～ 50 | 40～ 50 | 30～ 60 | - |
Annotate: the A. phenomenon is that gel fraction is 0, and the product microballoon is shaped as irregular sphere simultaneously, and size distribution is wide.
Claims (7)
1. cross-linked core-shell structure nano polymer microsphere, it is characterized in that: this microballoon has nucleocapsid structure, and nuclear is inner and the connection structure is all presented in shell inside, examine with shell between be connected by chemical bond, its particle diameter is less than 100nm; It is a raw material with following material, by being that medium adopts the method for letex polymerization or suspension polymerization to be prepared from water:
1) monoolefine monomer: 100 parts of the total mass meters of stratum nucleare monoolefine monomer and shell monoolefine monomer; Wherein stratum nucleare monoolefine monomer quality is between 30-70 part, and the shell monoolefine monomer is corresponding between 70-30 part;
2) multi-olefin monomer: stratum nucleare multi-olefin monomer and shell multi-olefin monomer total mass between 2-50 part, described stratum nucleare multi-olefin monomer and shell multi-olefin monomer the two all more than or equal to 1 part;
3) emulsifying agent: 2～7 parts;
4) initiator: 0.5～2 part.
Described monoolefine monomer is meant the monomer that only contains a carbon-carbon double bond in the molecule, in employing vinylchlorid, vinyl cyanide, acrylate or the methacrylic ester one or more, described multi-olefin monomer is meant the monomer that contains two or more carbon-carbon double bonds in the molecule.
2. according to the described cross-linked core-shell structure nano of claim 1 polymer microsphere, it is characterized in that: described multi-olefin monomer adopts one or more in suitable divinyl, isobutyl diene, isoprene, Vinylstyrene, the trihydroxy methyl propane trimethyl acrylate.
3. according to the described cross-linked core-shell structure nano of claim 1 polymer microsphere, it is characterized in that: described emulsifying agent adopts one or more in the following material:
A. cationic: as to comprise three C
1～18Alkyl methyl ammonium chloride, three C
1～18Alkyl methyl brometo de amonio, three C
1～18Alkyl benzyl ammonium chloride, three C
1～18Alkyl benzyl brometo de amonio or three C
1～18Alkyl methyl benzyl ammonium chloride, three C
1～18Alkyl ethylbenzylammonium chloride, three C
1～18Alkyl methyl benzyl brometo de amonio, three C
1～18Alkyl Ethylbenzyl brometo de amonio;
B. anionic: comprise C
12～18Sodium alkyl sulfate, C
12～18Alkylsurfuric acid potassium, C
12～18Alkyl sodium sulfonate, C
12～18Alkylsulphonic acid potassium, C
12～18Sodium alkyl benzene sulfonate, C
12～18Alkyl benzene sulphonate (ABS) potassium;
C. non-ionic type: comprise C3～10 alkyl phenol polyoxyethylenes (4～50) ether, C2～18 aliphatic alcohol polyethenoxies (4～50) ether, polyoxyethylene (4～50) sorbyl alcohol list C11～18 fatty acid esters or polyoxyethylene (4～50) sorbyl alcohol three C11～18 fatty acid esters.
4. according to the described cross-linked core-shell structure nano of claim 1 polymer microsphere, it is characterized in that: described initiator is meant can be under 40～95 ℃ of conditions, have 30～35kcal/mol ionic dissociation energy and can produce free radical to cause olefinic monomer polymeric water-soluble persulfuric acid salt material or oil-soluble azo class, peroxide material.
5. according to the described cross-linked core-shell structure nano of claim 4 polymer microsphere, it is characterized in that: described initiator is a kind of in Potassium Persulphate, ammonium persulphate, Diisopropyl azodicarboxylate or the 2,2'-Azobis(2,4-dimethylvaleronitrile); The perhaps redox system of forming with ferrous salt, sulphite, thiosulphate respectively for hydrogen peroxide, dibenzoyl peroxide.
6. emulsion polymerisation process for preparing cross-linked core-shell structure nano polymer microsphere as claimed in claim 1, it is characterized in that: this method is a raw material with monoolefine monomer, multi-olefin monomer, emulsifying agent and initiator, and wherein the content of each composition is:
Monoolefine monomer: 100 parts of the total mass meters of stratum nucleare monoolefine monomer and shell monoolefine monomer; Wherein stratum nucleare monoolefine monomer quality is between 30-70 part, and the shell monoolefine monomer is corresponding between 70-30 part;
Multi-olefin monomer: stratum nucleare multi-olefin monomer and shell multi-olefin monomer total mass between 2-50 part, described stratum nucleare multi-olefin monomer and shell multi-olefin monomer the two all more than or equal to l part;
Emulsifying agent: 2～7 parts;
Water soluble starter: 0.5～2 part;
Described monoolefine monomer is meant the monomer that only contains a carbon-carbon double bond in the molecule, in employing vinylchlorid, vinyl cyanide, acrylate or the methacrylic ester one or more, described multi-olefin monomer is meant the monomer that contains two or more carbon-carbon double bonds in the molecule.
The processing step of this method is as follows:
(1) preparation of stratum nucleare:
(a) by the above-mentioned raw materials proportioning with the stratum nucleare multi-olefin monomer of the stratum nucleare monoolefine monomer of 30-70% and 30-70% mixed evenly put into to contain deionized water and emulsifying agent and be warming up in advance in 40 ℃～50 ℃ the reactor form uniform emulsion, in this reactor, add and account for the water soluble starter of total amount 20～80%, and make it to be warming up to 70 ℃～95 ℃ temperature range internal reaction 0.5～2 hour;
(b) evenly add in the above-mentioned system remaining stratum nucleare monoolefine monomer and remaining stratum nucleare multi-olefin monomer are mixed, 70 ℃～95 ℃ temperature range internal reactions 1～3 hour;
(2) preparation of shell:
(c) select for use the monoolefine monomer different as in shell monoolefine monomer and the reacted system of the mixed evenly adding step (b) of shell multi-olefin monomer according to described proportion of raw materials with the stratum nucleare monoolefine monomer, add the residue water soluble starter then, 70 ℃～95 ℃ temperature range internal reactions 1～3 hour;
(d) behind the cooling discharging, and after breakdown of emulsion, washing, drying step are handled, can obtain the cross-linked core-shell structure nano polymer microsphere that the present invention proposes.
7. one kind prepares the suspension polymerization of cross-linked core-shell structure nano polymer microsphere according to claim 1, it is characterized in that: this method is a raw material with monoolefine monomer, multi-olefin monomer, emulsifying agent and initiator, and wherein the content of each composition is:
Monoolefine monomer: 100 parts of the total mass meters of stratum nucleare monoolefine monomer and shell monoolefine monomer; Wherein stratum nucleare monoolefine monomer quality is between 30-70 part, and the shell monoolefine monomer is corresponding between 70-30 part;
Multi-olefin monomer: stratum nucleare multi-olefin monomer and shell multi-olefin monomer total mass between 2-50 part, described stratum nucleare multi-olefin monomer and shell multi-olefin monomer the two all more than or equal to 1 part;
Emulsifying agent: 2～7 parts;
Oil-soluble initiator: 0.5～2 part;
Described monoolefine monomer is meant the monomer that only contains a carbon-carbon double bond in the molecule, in employing vinylchlorid, vinyl cyanide, acrylate or the methacrylic ester one or more, described multi-olefin monomer is meant the monomer that contains two or more carbon-carbon double bonds in the molecule.
The processing step of this method is as follows:
(1) preparation of stratum nucleare:
(a) by the proportioning in the described raw material with the oil-soluble initiator of the stratum nucleare multi-olefin monomer of the stratum nucleare monoolefine monomer of 30-70%, 30-70% and 20-80% mixed evenly put into to contain deionized water and emulsifying agent and be warming up in advance in 40 ℃～50 ℃ the reactor form uniform milk sap, and make it to be warming up to 70 ℃～95 ℃ temperature range internal reaction 0.5～2 hour;
(b) with in the mixed reaction system that evenly adds above-mentioned steps (a) of remaining stratum nucleare monoolefine monomer and remaining stratum nucleare multi-olefin monomer, 70 ℃～95 ℃ temperature range internal reactions 1～3 hour;
(2) preparation of shell:
(c) select for use the monoolefine monomer different as shell monoolefine monomer and shell multi-olefin monomer with remaining oil-soluble initiator is mixed evenly joins in the reacted system of step (b) by the proportioning in the described raw material, 70 ℃～95 ℃ temperature range internal reactions 1～3 hour with the stratum nucleare monoolefine monomer;
(d) behind the cooling discharging, and after breakdown of emulsion, washing, drying step are handled, can obtain the cross-linked core-shell structure nano polymer microsphere that the present invention proposes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410056806 CN1279068C (en) | 2004-01-16 | 2004-08-20 | Crosslinked core-shell structure nano-polymer microsphere and its preparation method |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200410000745.4 | 2004-01-16 | ||
| CN200410000745 | 2004-01-16 | ||
| CN 200410056806 CN1279068C (en) | 2004-01-16 | 2004-08-20 | Crosslinked core-shell structure nano-polymer microsphere and its preparation method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1618824A CN1618824A (en) | 2005-05-25 |
| CN1279068C true CN1279068C (en) | 2006-10-11 |
Family
ID=34796374
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200410056806 Expired - Fee Related CN1279068C (en) | 2004-01-16 | 2004-08-20 | Crosslinked core-shell structure nano-polymer microsphere and its preparation method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1279068C (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102847496B (en) * | 2011-07-02 | 2014-08-13 | 兰州大学 | Preparation method of calcium ion crosslinked poly(tert-butyl acrylate) microcapsules |
| CN102444027B (en) * | 2011-08-24 | 2013-07-03 | 翔瑞（泉州）纳米科技有限公司 | Antimicrobial fabric supported with nano silver core-shell polymer microsphere and preparation method thereof |
| CN104341546B (en) * | 2013-07-25 | 2016-06-08 | 中国石油天然气股份有限公司 | A kind of preparation method of shelly oil absorbing polymer microsphere |
| CN104448087B (en) * | 2013-09-18 | 2017-08-04 | 中国石油天然气集团公司 | A kind of core-shell polymers microballoon and its preparation and application |
| CN104403031A (en) * | 2014-12-15 | 2015-03-11 | 天津渤天化工有限责任公司 | Paste resin glove material with middle viscosity |
| CN104387508A (en) * | 2014-12-15 | 2015-03-04 | 天津渤天化工有限责任公司 | Method for preparing paste resin with medium viscosity |
| CN110804127B (en) * | 2019-11-14 | 2021-11-16 | 浙江理工大学 | Flexible photonic crystal element nano-microsphere and preparation method thereof |
| CN115138347B (en) * | 2022-07-25 | 2023-08-22 | 杭州师范大学 | Preparation method of strong-acid hollow nanospheres and application of strong-acid hollow nanospheres in urea adsorption |
-
2004
- 2004-08-20 CN CN 200410056806 patent/CN1279068C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1618824A (en) | 2005-05-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1417249A (en) | Composite polyolefin/sio2 nano particle and its prepn | |
| CN1246351C (en) | Nano macromolecule microball of epoxy function type cross-linked nucleocapsid structure and preparation process thereof | |
| CN1077717A (en) | Synthesizing of latex capsules | |
| CN1279068C (en) | Crosslinked core-shell structure nano-polymer microsphere and its preparation method | |
| CN1304436C (en) | Process for preparing reaction functional macromolecule/Al2O3 nano composite particles | |
| CN100418991C (en) | Porous polypropylene particle suspension solid phase graft-modification method | |
| CN100417686C (en) | High molecule/calcium carbonate nanometer particles, functional particles and prepn. method thereof | |
| CN1246352C (en) | Nano macromolecule microball of carboxy function type cross-linked nucleocapsid structure and preparation process thereof | |
| CN1583860A (en) | Preparing method for high cross-linked olefinic polymer/calcium carbonate composite nanometer particle | |
| CN1258544C (en) | Nano macromolecule microball of carboxy function type cross-linked nucleocapsid structure and preparation process thereof | |
| CN1189523C (en) | Surface treatment method for improving hydrophobicity of Nano particles of calcium carbonate | |
| CN103275275B (en) | A kind of preparation method of monodisperse polystyrene hybrid colloid emulsion of functionalization | |
| CN104672368A (en) | Preparation method of form-adjustable anisotropic asymmetric emulsion particles | |
| CN100558808C (en) | Nano calcium carbonate/polystyrene composite material and preparation method thereof | |
| CN1155630C (en) | Copolymer latex for reinforcing oil well and its prepn | |
| CN1258540C (en) | Macromolecule/A12O3 nano complex particle preparation method | |
| CN1168750C (en) | Suspension polymerization process of preparing polyvinyl chloride resin with high molecular weight | |
| CN1285616C (en) | Method for fabricatng compound microsphere of macromolecule/inorganic matter | |
| CN102532395B (en) | Acrylic fine particles and containing its diffusion barrier | |
| CN1218969C (en) | Composite nano epoxy functional polymer/SiO2 particle and its prepn process | |
| CN1583862A (en) | Preparingm ethod for olefinic polymer/calcium carbonate composite nanometer particle with high stem grafting rate and high stem grafting efficiency | |
| CN1246346C (en) | Process for preparing carboxyl functional macromolecular/SiO2 composite nano-particles | |
| CN1258570C (en) | Sulfonic acid functional macromolecular/SiO2 composite nano-particles and process for preparing same | |
| CN1618826A (en) | Method of copolymerization of maleic anhydride and vinyl acetate | |
| CN1807501A (en) | Preparation method of swelled vermiculite/ polyacrylic acid potassium- acrylamide high water absorption composite material |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20061011 Termination date: 20100820 |