CN104744930A - Method for improving nylon composite film surface hydrophobicity - Google Patents
Method for improving nylon composite film surface hydrophobicity Download PDFInfo
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- CN104744930A CN104744930A CN201510155796.2A CN201510155796A CN104744930A CN 104744930 A CN104744930 A CN 104744930A CN 201510155796 A CN201510155796 A CN 201510155796A CN 104744930 A CN104744930 A CN 104744930A
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K9/00—Use of pretreated ingredients
- C08K9/02—Ingredients treated with inorganic substances
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/18—Manufacture of films or sheets
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
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- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/34—Silicon-containing compounds
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/34—Silicon-containing compounds
- C08K3/346—Clay
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/34—Silicon-containing compounds
- C08K3/36—Silica
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K7/00—Use of ingredients characterised by shape
- C08K7/22—Expanded, porous or hollow particles
- C08K7/24—Expanded, porous or hollow particles inorganic
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2377/00—Characterised by the use of polyamides obtained by reactions forming a carboxylic amide link in the main chain; Derivatives of such polymers
- C08J2377/02—Polyamides derived from omega-amino carboxylic acids or from lactams thereof
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/011—Nanostructured additives
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Abstract
The invention discloses a method for improving the surface hydrophobicity of a nylon composite film. The method comprises the following preparation steps: (1) the surface of an inorganic filling material is modified with one or more functional groups selected from NH4Cl, NH4Br, NH4F and NH4I; (2) nylon which can be formed into a film through phase transformation and the inorganic filling material modified in the step (1) are dissolved in a solvent, such that a mother liquor is prepared; (3) the mother liquor is placed on a conductive film-forming plate; (4) an electrostatic field perpendicular to the conductive film-forming plate is applied on the conductive film-forming plate. The electrostatic field promotes the phase transformation of the mother liquor, such that a hydrophobic nylon composite film is obtained.
Description
Technical field
The present invention relates to a kind of preparation method of nylon membrane material, particularly relate to a kind of surface hydrophilicity difference of preparing in the method for hydrophobic coextrusion nylon film.
Background technology
Nylon is the important thermoplastic resin of a class.The nylon with the water-wet behavior of reduction can have less water absorbability, the property of softening of lower frictional coefficient and enhancing and hydrophobicity.For the modification of nylon material, the method for filler absorption by physics, chemistry is mixed in nylon matrix by method common in this area.Usually, hydrophilic filler is for improving the wetting ability of nylon, and hydrophobic filler is for promoting the hydrophobicity of nylon.Hydrophobic siloxane fluid is the common rear additive of nylon, to reduce the wetting ability of siloxanes, even if they are more hydrophobic.But by siloxane fluid, as polydimethylsiloxane, when joining in nylon, in the melt blending process of routine, siloxanes can move in nylon matrix, makes siloxanes easily form reunion in matrix, some physicalies of negative impact.Patent CN1325538C discloses a kind of preparation method preparing hydrophobicity nylon fiber.With the alkyl of hydrophobic type, siloxane chain or phenyl modified polysiloxane side chain, and the blending means commonly used with this area and nylon blending prepare the coextrusion nylon film of hydrophobic type.Patent CN103665841 discloses a kind of production method of automotive plastic parts proof antistatic water modification of nylon 12.Added to by the silicon-dioxide of hydrophobic type in nylon 12 matrix, make material have hydrophobicity, anti-water resistance tide characteristic improves.Patent CN102993688 discloses a kind of Super hydrophobic compound film and preparation method thereof.A small amount of to the polyethylene of hydrophobic type, polypropylene, vinylbenzene and silicone oil is added in nylon, fully after mixing, after being added to the nylon layer plastic extrusion of multi-layer co-extruded film blowing device, blown film, obtains the laminated film of hydrophobic type.In sum, existingly improving the hydrophobic method of nylon, is all by hydrophobic filler, or mineral filler or polymer carrier, adds in nylon matrix, thus promotes nylon hydrophobicity.Also do not have one to be mixed in nylon matrix by hydrophilic mineral filler, promote nylon hydrophobic property.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of method improving coextrusion nylon film surface hydrophobicity.The present invention there is provided on the surface after one adds hydrophilic filler to nylon matrix and promotes hydrophobic method, fundamentally there is provided one by regulating the hydrogen bond orientation of coextrusion nylon film material internal, obtaining the method for hydrophobicity nylon film.
Usually, hydrophilic mineral filler is mixed in nylon matrix, due to the moisture-absorption characteristics of hydrophilic filler, can reduce the contact angle on nylon surface, thus promotes the wetting ability of material.Technical problem to be solved by this invention is to provide a kind of preparation method preparing hydrophobicity nylon membrane material.Feature is in nylon matrix, be mixed into hydrophilic mineral filler, but improves the hydrophobicity of nylon matrix.
The present invention solves the problems of the technologies described above adopted technical scheme: a kind of method improving coextrusion nylon film surface hydrophobicity, it is characterized in that concrete preparation process is as follows: (1) is by inorganic filler surface NH
4cl, NH
4br, NH
4f, NH
4one or more modifications in I functional group; (2) can be dissolved in solvent by the mineral filler of modification in the nylon of forming film with phase transformation method and step (1), prepare mother liquor; (3) mother liquor is placed on conduction film forming flat board; (3) on conduction film forming flat board, apply the electrostatic field perpendicular to conduction film forming flat board, this electrostatic field impels mother liquor inversion of phases, obtains hydrophobicity coextrusion nylon film.
Described solvent is trifluoroethanol or formic acid.
Described mineral filler is polysilsesquioxane, covers and open up soil, silicon-dioxide, carbon black or CNT (carbon nano-tube).
Described electrostatic field applies to be formed by direct supply, and the voltage of described direct supply is 10V-10000V.
Polymer in described mother liquor and the mass ratio of solvent are 0.001g/ml-10g/ml.
Mineral filler in described mother liquor and the mass ratio of nylon are 0.1%-10%.
When described mineral filler, nylon and solvent prepare mother liquor, mixing time is 10h-48h.
Described electrostatic field provides by conducting electricity film forming flat board, and the top of conduction film forming flat board is provided with conduction film forming upper plate, and the dull and stereotyped ground connection of described conduction film forming, described conduction film forming upper plate connects power supply.
Compared with prior art, the invention has the advantages that relate in the present invention by inorganic filler surface NH
4cl, NH
4br, NH
4f, NH
4one or more in I functional group are modified, and the polarity of this filler and nylon is close.When applying electric field, after the forming film with phase transformation method of routine, this filler can realize dispersed at nylon matrix and surface, and now, the wetting ability of nylon promotes.But introduce electrostatic field in film process after, the hydrogen bond formed between the amido linkage in nylon segment or generation orientation, destroy the crystalline environment of nylon.When with NH
4cl, NH
4br, NH
4f, NH
4the mineral filler of I functional group modification adds in nylon, and under the effect of electric field, functional group is ionized into NH in trifluoroethanol or formic acid
4 +, X
-with X halogen.The functional group of these modifications can form the hydrogen bond of orientation with the amido linkage of nylon segment, thus is adsorbed on around filler by a large amount of for nylon segment, facilitates the heterogeneous nucleation crystallization of nylon.These take by force to hydrogen bond make that Nylon 6 Chains section is connected each other by hydrogen bond with the hydrophilic functional groups in mineral filler, crystallization, a large amount of effective hydrophilic functional groups is therefore occupied.On the one hand, hydrophilic Inorganic functional groups cannot move to surface and reduce surface hydrophilicity, and on the other hand, the hydrophilic functional groups of nylon matrix inside is limited near crystallizing field by hydrogen bond, reduces the wetting ability of material.
Accompanying drawing explanation
Fig. 1 is comparative example 1 film upper surface contact angle schematic diagram;
Fig. 2 is comparative example 2 film upper surface contact angle schematic diagram;
Fig. 3 is film deposition system schematic diagram of the present invention;
Fig. 4 is the embodiment of the present invention 1 film upper surface contact angle schematic diagram;
Fig. 5 is the embodiment of the present invention 2 film upper surface contact angle schematic diagram.
Embodiment
Below in conjunction with accompanying drawing embodiment to the present invention (being described in further detail).
Comparative example 1
Be that the nylon 6 of 10000g/mol is dissolved in 10ml formic acid by 0.5g molecular weight, obtain film forming mother liquor.Be placed in by film forming mother liquor 5ml on conduction film forming flat board, do not apply voltage, film forming after naturally volatilizing under room temperature, film formation time needs 24h.Contact angle is 68 °, and result as shown in Figure 1.
Comparative example 2
Be that the nylon 6 of 10000g/mol is dissolved in 10ml formic acid by 0.5g molecular weight, add NH subsequently
4the polysilsesquioxane 0.01g of Cl modification, obtains film forming mother liquor.Be placed in by film forming mother liquor 5ml on conduction film forming flat board, film forming after naturally volatilizing under room temperature, film formation time needs 24h.Composite membrane upper surface Si constituent content 0.2wt%, contact angle is 59 °, and result as shown in Figure 2.Compared with thin with the pure nylon membrane prepared in comparative example 1, inorganic nanoparticles polysilsesquioxane moves to film surface, and contact angle declines, and shows that the wetting ability of composite membrane strengthens
Embodiment 1
Be that the nylon 6 of 10000g/mol is dissolved in 10ml formic acid by 0.5g molecular weight, add NH subsequently
4the polysilsesquioxane 0.01g of Cl modification, mixing time 45 hours, obtains film forming mother liquor.Be placed in by film forming mother liquor 5ml on conduction film forming flat board, film forming flat board be placed in parallel plate electric field, apply electric field in watch-glass both sides, the dull and stereotyped upper plate of film forming of wherein conducting electricity is electronegative, and plate earthing under conduction film forming flat board, volts DS field intensity is 1000V.Film deposition system schematic diagram as shown in Figure 3.Under room temperature, 30min film forming liquid is separated completely the electric field action time, obtains organic/inorganic composite film.Matrix material is through energy spectrum analysis, and surperficial Si content is 0wt%.Contact angle is 89 °, and result as shown in Figure 4.Test result is compared with comparative example 2, and inorganic nanoparticles polysilsesquioxane is suppressed to film surface transport phenomena, and filler multidigit is in body, and composite film surface wetting ability is obviously declined, and material is hydrophobic property.
Embodiment 2
Be that the nylon 6 of 10000g/mol is dissolved in 10ml trifluoroethanol by 0.5g molecular weight, add NH subsequently
4the illiteracy of Br modification opens up native 0.1g, mixing time 30 hours, obtains film forming mother liquor.Be placed in by film forming mother liquor 5ml on conduction film forming flat board, film forming flat board be placed in parallel plate electric field, apply electric field in watch-glass both sides, the dull and stereotyped upper plate of film forming of wherein conducting electricity is electronegative, and plate earthing under conduction film forming flat board, volts DS field intensity is 1000V.Film deposition system schematic diagram as shown in Figure 3.Under room temperature, 30min film forming liquid is separated completely the electric field action time, obtains organic/inorganic composite film.Matrix material is through energy spectrum analysis, and surperficial Si content is 0.1wt%.Contact angle is 95 °, and result as shown in Figure 5.Test result is compared with comparative example 2, and inorganic nanoparticles polysilsesquioxane is suppressed to film surface transport phenomena, and filler is scattered in body mostly, and composite film surface wetting ability is obviously declined, and material is hydrophobic property.
Embodiment 3
Be that the nylon 6 of 10000g/mol is dissolved in 10ml formic acid by 0.5g molecular weight, add NH subsequently
4the silicon-dioxide 0.1g of F modification, mixing time 15 hours, obtains film forming mother liquor.Be placed in by film forming mother liquor 5ml on conduction film forming flat board, film forming flat board be placed in parallel plate electric field, apply electric field in watch-glass both sides, the dull and stereotyped upper plate of film forming of wherein conducting electricity is electronegative, and plate earthing under conduction film forming flat board, volts DS field intensity is 1000V.Film deposition system schematic diagram as shown in Figure 3.Under room temperature, 30min film forming liquid is separated completely the electric field action time, obtains organic/inorganic composite film.Matrix material is through energy spectrum analysis, and surperficial Si content is 0.1wt%.Contact angle is 95 °, and result as shown in Figure 5.Test result is compared with comparative example 2, and inorganic nanoparticles polysilsesquioxane is suppressed to film surface transport phenomena, and filler is scattered in body mostly, and composite film surface wetting ability is obviously declined, and material is hydrophobic property.
Embodiment 4
Be that the nylon 6 of 10000g/mol is dissolved in 10ml trifluoroacetic acid by 0.5g molecular weight, add NH subsequently
4the carbon black of I modification or CNT (carbon nano-tube) 0.1g, mixing time 10 hours, obtains film forming mother liquor.Be placed in by film forming mother liquor 5ml on conduction film forming flat board, film forming flat board be placed in parallel plate electric field, apply electric field in watch-glass both sides, the dull and stereotyped upper plate of film forming of wherein conducting electricity is electronegative, and plate earthing under conduction film forming flat board, volts DS field intensity is 1000V.Film deposition system schematic diagram as shown in Figure 3.Under room temperature, 30min film forming liquid is separated completely the electric field action time, obtains organic/inorganic composite film.Matrix material is through energy spectrum analysis, and surperficial Si content is 0.1wt%.Contact angle is 95 °, and result as shown in Figure 5.Test result is compared with comparative example 2, and inorganic nanoparticles polysilsesquioxane is suppressed to film surface transport phenomena, and filler is scattered in body mostly, and composite film surface wetting ability is obviously declined, and material is hydrophobic property.
Claims (8)
1. improve a method for coextrusion nylon film surface hydrophobicity, it is characterized in that concrete preparation process is as follows: (1) is by inorganic filler surface NH
4cl, NH
4br, NH
4f, NH
4one or more modifications in I functional group; (2) can be dissolved in solvent by the mineral filler of modification in the nylon of forming film with phase transformation method and step (1), prepare mother liquor; (3) mother liquor is placed on conduction film forming flat board; (3) on conduction film forming flat board, apply the electrostatic field perpendicular to conduction film forming flat board, this electrostatic field impels mother liquor inversion of phases, obtains hydrophobicity coextrusion nylon film.
2., according to a kind of method improving coextrusion nylon film surface hydrophobicity according to claim 1, it is characterized in that described solvent is trifluoroethanol or formic acid.
3., according to a kind of method preparing hydrophobicity coextrusion nylon film according to claim 1, it is characterized in that described mineral filler is polysilsesquioxane, covers and open up soil, silicon-dioxide, carbon black or CNT (carbon nano-tube).
4., according to a kind of method preparing hydrophobicity coextrusion nylon film according to claim 1, it is characterized in that described electrostatic field applies to be formed by direct supply, the voltage of described direct supply is 10V-10000V.
5., according to a kind of method preparing hydrophobicity coextrusion nylon film according to claim 1, it is characterized in that the mass ratio of polymer in described mother liquor and solvent is 0.001g/ml-10g/ml.
6., according to a kind of method preparing hydrophobicity coextrusion nylon film according to claim 1, it is characterized in that the mass ratio of mineral filler in described mother liquor and nylon is 0.1%-10%.
7., according to a kind of method preparing hydrophobicity coextrusion nylon film according to claim 1, when it is characterized in that described mineral filler, nylon and solvent prepare mother liquor, mixing time is 10h-48h.
8. according to a kind of method preparing hydrophobicity coextrusion nylon film according to claim 4, it is characterized in that described electrostatic field provides by conducting electricity film forming flat board, the top of conduction film forming flat board is provided with conduction film forming upper plate, and the dull and stereotyped ground connection of described conduction film forming, described conduction film forming upper plate connects power supply.
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| CN201510155796.2A CN104744930B (en) | 2015-04-03 | 2015-04-03 | Method for preparing hydrophobic nylon composite film |
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| CN201510155796.2A CN104744930B (en) | 2015-04-03 | 2015-04-03 | Method for preparing hydrophobic nylon composite film |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106832913A (en) * | 2017-02-28 | 2017-06-13 | 苏州博利迈新材料科技有限公司 | A kind of hydrophobicity nylon 66 composite material and preparation method thereof |
| CN108795029A (en) * | 2018-06-28 | 2018-11-13 | 宁波工程学院 | A kind of method preparing polyamide/chitosan mixed film and application |
Citations (2)
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|---|---|---|---|---|
| CN103111195A (en) * | 2013-03-13 | 2013-05-22 | 株洲时代新材料科技股份有限公司 | High-temperature resistance polyamide composite membrane and preparation method thereof |
| CN103755984A (en) * | 2013-12-30 | 2014-04-30 | 宁波工程学院 | Method for preparing macromolecular nano composite membrane enriching inorganic filler on surface |
-
2015
- 2015-04-03 CN CN201510155796.2A patent/CN104744930B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103111195A (en) * | 2013-03-13 | 2013-05-22 | 株洲时代新材料科技股份有限公司 | High-temperature resistance polyamide composite membrane and preparation method thereof |
| CN103755984A (en) * | 2013-12-30 | 2014-04-30 | 宁波工程学院 | Method for preparing macromolecular nano composite membrane enriching inorganic filler on surface |
Non-Patent Citations (2)
| Title |
|---|
| QI ZHOU等: "The migration of POSS molecules in PA6 matrix during phase inversion process", 《APPLIED SURFACE SCIENCE》 * |
| The migration of POSS molecules in PA6 matrix during phase inversion process;Qi Zhou等;《Applied Surface Science》;20130718;第284卷;118-125 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106832913A (en) * | 2017-02-28 | 2017-06-13 | 苏州博利迈新材料科技有限公司 | A kind of hydrophobicity nylon 66 composite material and preparation method thereof |
| CN108795029A (en) * | 2018-06-28 | 2018-11-13 | 宁波工程学院 | A kind of method preparing polyamide/chitosan mixed film and application |
| CN108795029B (en) * | 2018-06-28 | 2020-09-04 | 宁波工程学院 | Method for preparing polyamide/chitosan blend membrane and application |
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