CN104262959B - A kind of preparation method of polypyrrole/meerschaum water nano composite anti-corrosion material - Google Patents

A kind of preparation method of polypyrrole/meerschaum water nano composite anti-corrosion material Download PDF

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CN104262959B
CN104262959B CN201410577144.3A CN201410577144A CN104262959B CN 104262959 B CN104262959 B CN 104262959B CN 201410577144 A CN201410577144 A CN 201410577144A CN 104262959 B CN104262959 B CN 104262959B
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meerschaum
polypyrrole
nano composite
aqueous dispersions
corrosion
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CN104262959A (en
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陈均
潘正凯
陶祯臻
张千峰
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Anhui University of Technology AHUT
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    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L79/00—Compositions of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing nitrogen with or without oxygen or carbon only, not provided for in groups C08L61/00 - C08L77/00
    • C08L79/04—Polycondensates having nitrogen-containing heterocyclic rings in the main chain; Polyhydrazides; Polyamide acids or similar polyimide precursors
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G73/00—Macromolecular compounds obtained by reactions forming a linkage containing nitrogen with or without oxygen or carbon in the main chain of the macromolecule, not provided for in groups C08G12/00 - C08G71/00
    • C08G73/06—Polycondensates having nitrogen-containing heterocyclic rings in the main chain of the macromolecule
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G77/00—Macromolecular compounds obtained by reactions forming a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon in the main chain of the macromolecule
    • C08G77/04—Polysiloxanes
    • C08G77/22—Polysiloxanes containing silicon bound to organic groups containing atoms other than carbon, hydrogen and oxygen
    • C08G77/26—Polysiloxanes containing silicon bound to organic groups containing atoms other than carbon, hydrogen and oxygen nitrogen-containing groups
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    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D179/00—Coating compositions based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing nitrogen, with or without oxygen, or carbon only, not provided for in groups C09D161/00 - C09D177/00
    • C09D179/04—Polycondensates having nitrogen-containing heterocyclic rings in the main chain; Polyhydrazides; Polyamide acids or similar polyimide precursors
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    • C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
    • C09D5/08—Anti-corrosive paints
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00—Polymer mixtures characterised by other features
    • C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00—Polymer mixtures characterised by other features
    • C08L2205/14—Polymer mixtures characterised by other features containing polymeric additives characterised by shape
    • C08L2205/16—Fibres; Fibrils

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Abstract

The preparation method that the invention discloses a kind of polypyrrole/meerschaum water nano composite anti-corrosion material, belongs to technical field of metal anti-corrosion.The method specifically comprises the following steps that phosphoric acid, pyrroles are joined in meerschaum aqueous dispersions and stir by (1), is added dropwise over by the phosphate aqueous solution dissolved with oxidant, stirs after dropwising, it is thus achieved that threadiness polypyrrole/meerschaum dispersion liquid；(2) acrylic emulsion is joined in above-mentioned polypyrrole/meerschaum dispersion liquid, add hydrolyzed silane solution, stirring, it is thus achieved that polypyrrole/meerschaum water nano composite anti-corrosion material.The present invention adopts in situ chemical oxidative polymerization method that with meerschaum compound preparation threadiness polypyrrole/meerschaum aqueous nanocomposite, polypyrrole is dissipated liquid, the problem solving polypyrrole machinability difference, preparation technology is simple, condition is controlled simultaneously, and the polypyrrole/meerschaum water nano composite anti-corrosion material prepared has the antiseptic property of excellence.

Description

A kind of preparation method of polypyrrole/meerschaum water nano composite anti-corrosion material
Technical field
The invention belongs to technical field of metal anti-corrosion, the preparation method being specifically related to a kind of anti-corrosion material, the preparation method particularly relating to a kind of threadiness polypyrrole/meerschaum water nano composite anti-corrosion material.
Background technology
Chemistry or electrochemical action is there is and cause rotten or destroy and be referred to as corrosion of metal between metal and surrounding medium.Iron and steel gets rusty in an atmosphere, the perforation of getting rusty of underground metal pipes, and steamer becomes rusty candle in the seawater, and the corrosion etc. of the vehicles such as automobile is all common corrosion phenomenon.National product not only can be caused economic loss by corrosion of metal, also usually can endanger the safety of people.The such as underground oil gas pipeline leakage that breakage causes because of corrosion, the accident etc. that the vehicles occur because of corrosion.Corrosion also can produce the problems such as substantial amounts of energy waste and environmental pollution.Metal material generally will do surface treatment so that it is the thin film that the form compact and stable property of Surface Creation one layer is higher, to improve its corrosion stability, increases lustrous surface property and contamination resistance.
Conducting polymer (polypyrrole, polyaniline and polythiophene and their derivant), as the corrosion-inhibiting coating of metal, has good antiseptic effect.Wherein, owing to polypyrrole synthesis is easy, less costly, thermally and chemically stability is high, is therefore a kind of polymer anti-corrosion material most with practical value.In order to obtain the macromolecule conducting material of excellent combination property, except continuing to develop synthesizing new macromolecular material, existing macromolecular material is carried out finishing or modified, it has also become a kind of effective way of polymeric material field research and development.Make the more original performances of macromolecular material improve by effects such as physics, machinery and chemistry, reach intended purpose, be referred to as the finishing of macromolecular material or modified.Macromolecular material is carried out finishing or modified, be possible not only to improve its performance originally having, form the Polymer Systems with Good All-around Property, and can substantially reduce the expense in macromolecular material exploitation and development process；Meanwhile, expand the application of macromolecular material further, substantially increase the industrial application value of material.The meerschaum (SC) of unique texture, has higher porosity and bigger specific surface area, in addition with good rheological characteristic, catalytic and adsorptivity etc., gives it and have broader application.
Summary of the invention
The problem that the present invention is directed to polypyrrole machinability difference, by polypyrrole and meerschaum compound, by in situ chemical oxidative polymerization synthetic fibers shape polypyrrole/meerschaum aqueous dispersions, and then prepare polypyrrole/meerschaum water nano composite anti-corrosion material with acrylic emulsion and organosilan compound.
The preparation method of polypyrrole provided by the present invention/meerschaum water nano composite anti-corrosion material, specifically comprises the following steps that
(1) preparation of threadiness polypyrrole/meerschaum aqueous dispersions: meerschaum is scattered in deionized water, after addition phosphoric acid, pyrroles stir 1 hour, phosphate aqueous solution dissolved with oxidant is added dropwise over, wherein pyrroles's aqueous solution is 4 with the mass ratio of aqueous oxidizing agent solution, dropwise rear stirring reaction 12 hours, it is thus achieved that threadiness polypyrrole/meerschaum aqueous dispersions；
Described pyrroles and meerschaum gross mass account for the 0.2%～2.0% of polypyrrole/meerschaum aqueous dispersions, and wherein pyrroles is 0.5～1.5 with the mass ratio of meerschaum；Described phosphoric acid quality accounts for the 1.0～2.0% of polypyrrole/meerschaum aqueous dispersions；Described oxidant is any one in Ammonium persulfate., sodium peroxydisulfate and sodium iodate, and the mol ratio of oxidant and pyrroles is 1:1；
(2) preparation of polypyrrole/meerschaum water nano composite anti-corrosion material: acrylic emulsion is joined in the polypyrrole described in step (1)/meerschaum aqueous dispersions, wherein acrylic emulsion is 1 with the mass ratio of polypyrrole/meerschaum aqueous dispersions, add hydrolyzed silane solution, wherein hydrolyzed silane solution is 0.15～0.3 with the mass ratio of polypyrrole/meerschaum aqueous dispersions, stir 2～4 hours, it is thus achieved that polypyrrole/meerschaum water nano composite anti-corrosion material；
Described acrylic emulsion is cationic acrylic emulsion, and pH is 3～5, and solid content is 30%；
Described silane is one or more in APTES and N-(2-aminoethyl)-3-aminopropyl triethoxysilane, and the mass concentration of this hydrolyzed silane solution is 15%.
Compared with prior art, the beneficial effects of the present invention is:
1, the present invention adopts in situ chemical oxidative polymerization method that with meerschaum compound preparation threadiness polypyrrole/meerschaum aqueous nanocomposite, polypyrrole is dissipated liquid, the problem solving polypyrrole machinability difference.
2, the water nano composite anti-corrosion material that the fibrous polypyrrole/meerschaum of synthesis is prepared by the present invention with acrylic emulsion and organosilan compound, thin film one layer fine and close can be formed at metal material surface, improve corrosion of metal current potential, reduce corrosion current, coating has significantly high adhesion, not easily peel off, and coating is fine and close, metal material can be made to avoid corrosion.
3, preparation technology of the present invention is simple, condition is controlled, and the polypyrrole/meerschaum water nano composite anti-corrosion material prepared has the antiseptic property of excellence.
Accompanying drawing explanation
Fig. 1 is the scanning electron microscope (SEM) photograph of threadiness polypyrrole/meerschaum.
Fig. 2 is embodiment 1 polypyrrole base water-repellent preservation coating electrochemistry spectrogram (a. polarization curve in cold-reduced sheet；B. AC impedance).
Fig. 3 is embodiment 2 polypyrrole base water-repellent preservation material electrochemistry spectrogram (a. polarization curve in tinplate；B. AC impedance).
Fig. 4 is embodiment 3 polypyrrole base water-repellent preservation material electrochemistry spectrogram (a. polarization curve in galvanized sheet；B. AC impedance).
Detailed description of the invention
Below in conjunction with specific embodiment in detail the present invention is described in detail, but the present invention is not limited to following embodiment.
Embodiment 1
2.16g meerschaum is scattered in 136.08g deionized water, after addition 2.88g phosphoric acid, 2.16 pyrroles stir 1 hour, 36g aqueous solution dissolved with 11.022g Ammonium persulfate. and 1.08g phosphoric acid is added dropwise over, dropwise rear stirring reaction 12 hours, it is thus achieved that threadiness polypyrrole/meerschaum aqueous dispersions.180g acrylic emulsion is joined in above-mentioned polypyrrole/meerschaum aqueous dispersions, adds the APTES hydrolyzed solution of 50g15%, stir 4 hours, it is thus achieved that polypyrrole/meerschaum water nano composite anti-corrosion material.With the spreaders of 10 μm by anti-corrosion material even application on the cold-reduced sheet surface after rust cleaning oil removing, after drying, measure its electrochemical parameter with CHI760D electrochemical workstation, see accompanying drawing 2.As shown in Figure 2, polypyrrole/meerschaum composite film improves the corrosion potential of metal surface, reduces corrosion electric current density, and impedance increasing radius nearly 5 is accompanied, and illustrates that there is good antiseptic property cold-reduced sheet metal surface by corrosion-inhibiting coating.
Embodiment 2
0.2g meerschaum is scattered in 142.16g deionized water, after addition 1.44g phosphoric acid, 0.2g pyrroles stir 1 hour, 36g aqueous solution dissolved with 0.56g sodium peroxydisulfate and 0.36g phosphoric acid is added dropwise over, dropwises rear stirring reaction 12 hours, it is thus achieved that threadiness polypyrrole/meerschaum aqueous dispersions.180g acrylic emulsion is joined in above-mentioned polypyrrole/meerschaum aqueous dispersions, add N-(2-the aminoethyl)-3-aminopropyl triethoxysilane hydrolyzed solution of 30g15%, stir 2 hours, it is thus achieved that polypyrrole/meerschaum water nano composite anti-corrosion material.With the spreaders of 10 μm by anti-corrosion material even application on the tinplate surface after rust cleaning oil removing, after drying, measure its electrochemical parameter with CHI760D electrochemical workstation, see accompanying drawing 3.From the figure 3, it may be seen that polypyrrole/meerschaum corrosion-inhibiting coating reduces corrosion electric current density, corrosion potential raises about 160mv, and resistance value is far longer than naked tinplate, illustrates that this polypyrrole/meerschaum composite anti-corrosive coating improves tinplate surface corrosion-resistant erosion ability.
Embodiment 3
1.4g meerschaum is scattered in 139.44g deionized water, after addition 2.16g phosphoric acid, 1.0g pyrroles stir 1 hour, 36g aqueous solution dissolved with 2.292g sodium iodate and 0.54g phosphoric acid is added dropwise over, dropwises rear stirring reaction 12 hours, it is thus achieved that threadiness polypyrrole/meerschaum aqueous dispersions.180g acrylic emulsion is joined in above-mentioned polypyrrole/meerschaum aqueous dispersions, add the APTES hydrolyzed solution of 25g15% and N-(2-the aminoethyl)-3-aminopropyl triethoxysilane hydrolyzed solution of 20g15%, stir 3 hours, it is thus achieved that polypyrrole/meerschaum water nano composite anti-corrosion material.With the spreaders of 10 μm by anti-corrosion material even application on the galvanized sheet surface after defat, after drying, measure its electrochemical parameter with CHI760D electrochemical workstation, see accompanying drawing 4.As shown in Figure 4, synthesized polypyrrole/meerschaum corrosion-inhibiting coating improves the corrosion potential on galvanized sheet surface, reduces corrosion electric current density, and impedance radius becomes big, illustrates that this polypyrrole/meerschaum composite anti-corrosive coating improves the antiseptic property of galvanized sheet.

Claims (1)

1. the preparation method of polypyrrole/meerschaum water nano composite anti-corrosion material, it is characterised in that the method comprises the following steps:
(1) preparation of threadiness polypyrrole/meerschaum aqueous dispersions: meerschaum is scattered in deionized water, after addition phosphoric acid, pyrroles stir 1 hour, phosphate aqueous solution dissolved with oxidant is added dropwise over, wherein pyrroles's aqueous solution is 4 with the mass ratio of aqueous oxidizing agent solution, dropwise rear stirring reaction 12 hours, it is thus achieved that threadiness polypyrrole/meerschaum aqueous dispersions；
Described pyrroles and meerschaum gross mass account for the 0.2%～2.0% of polypyrrole/meerschaum aqueous dispersions, and wherein pyrroles is 0.5～1.5 with the mass ratio of meerschaum；Described phosphoric acid quality accounts for the 1.0～2.0% of polypyrrole/meerschaum aqueous dispersions；Described oxidant is any one in Ammonium persulfate., sodium peroxydisulfate and sodium iodate, and the mol ratio of oxidant and pyrroles is 1:1；
(2) preparation of polypyrrole/meerschaum water nano composite anti-corrosion material: acrylic emulsion is joined in the polypyrrole described in step (1)/meerschaum aqueous dispersions, wherein acrylic emulsion is 1 with the mass ratio of polypyrrole/meerschaum aqueous dispersions, add hydrolyzed silane solution, wherein hydrolyzed silane solution is 0.15～0.3 with the mass ratio of polypyrrole/meerschaum aqueous dispersions, stir 2～4 hours, it is thus achieved that polypyrrole/meerschaum water nano composite anti-corrosion material；
Described acrylic emulsion is cationic acrylic emulsion, and pH is 3～5, and solid content is 30%；
Described silane is one or both in APTES and N-(2-aminoethyl)-3-aminopropyl triethoxysilane, and the mass concentration of this hydrolyzed silane solution is 15%.
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CN103980488A (en) * 2014-05-22 2014-08-13 西南科技大学 Preparation method of sepiolite/polyaniline nanocomposite material

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