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A kind of preparation method of block polymer-nanometer metal thin layer composite conductive material

A technology of block polymers and nano-metals, which is applied in the field of functional composite material preparation to achieve good electrical conductivity, good material performance, and a wide range of applications

Active Publication Date: 2014-10-01
QINGDAO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to overcome the shortcomings of the prior art, seek to design and provide a preparation process for nanocomposite conductive materials, by designing structural parameters such as segment composition, segment length and total molecular weight of block polymers, using The polarity difference and incompatibility of the two chain segments contained in the segment polymer, and then the mechanism of phase separation to form a two-phase nanostructure, has an inducing effect on the formation of a uniformly dispersed morphology of the coated nano-metal, and then generates The uniform conductive continuous network has both the good electrical conductivity of metals and the good mechanical properties of polymer materials to overcome the defects of a single material; the good dispersion of nano-metals in polymers makes the prepared composite materials It can have the good electrical conductivity of metal, and at the same time can save nano-metal, reduce the cost of conductive materials, and improve the cost performance of composite materials; compound nano-metal silver with amphiphilic block polymers, and embed nano-metal silver in the amphiphile The interior of the block polymer enables the metal to isolate the air, avoid being oxidized and corroded, and affect its performance; the metal is made into a nano-scale form and uniformly dispersed in the amphiphilic block polymer to obtain a composite The material has the light-weight characteristics of polymers

Method used

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  • A kind of preparation method of block polymer-nanometer metal thin layer composite conductive material
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  • A kind of preparation method of block polymer-nanometer metal thin layer composite conductive material

Examples

Experimental program
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Effect test

Embodiment 1

[0029] The first step is to synthesize amphiphilic block polymer polystyrene-polyacrylic acid (PS-PAA) by RAFT polymerization method. Weigh 0.0353g of self-made RAFT reagent, 10ml of dioxane solvent and 2g of styrene, respectively. Add 0.0055g of azobisisobutyronitrile into a 50ml round-bottomed flask, put it into the rotor and seal it with a rubber stopper, pass nitrogen through a long needle for 10 minutes to remove the oxygen in the round-bottomed flask, then seal it well, and put it into the 90 Take it out after heating in an oil bath at ℃ for 3 hours, and the product is precipitated by n-hexane three times, and then dried in a vacuum oven for 24 hours to obtain PS; then take 2 g of PS and 14.1875 g of tert-butyl acrylate PtBA and repeat the step of preparing PS in the previous step That is to obtain PS-PtBA, add 5ml of trifluoroacetic acid to the obtained product and hydrolyze it for 24 hours to obtain PS-PAA. According to weighing design, its total molecular weight is 100...

Embodiment 2

[0035]In the first step, referring to the preparation method of the amphiphilic block polymer in Example 1, PS-P2VP with a total molecular weight of 20,000 and a segment length ratio of 2:8 was prepared, and dissolved in acetone to form a 5wt% solution ; With reference to the preparation method of the nano-silver wire in Example 1, the nano-gold wire is prepared, and added into acetone to configure a 1wt% homogeneous solution;

[0036] In the second step, the prepared two solutions are mixed at a volume ratio of 2:1 to obtain a mixed solution in which the ratio of the gold mass to the amphiphilic block polymer is 10%, and the ultrasonic vibration is used to fully mix it to become a uniform composite solution;

[0037] In the third step, the composite solution obtained is spin-coated to obtain a composite thin film layer, and dried to obtain the product; the resulting composite thin film layer product is tested for its electrical conductivity by the four-probe method, and is uni...

Embodiment 3

[0041] The first step refers to the preparation method of the amphiphilic block polymer in Example 1 to prepare the amphiphilic block polymer PBA-PAA, which has a total molecular weight of 20000 and a segment length ratio of 4:6, soluble in Acetone is configured into a 5wt% solution; the preparation of nano-copper particles: Dilute the mother liquor containing a certain amount of protective agent (4ml of cetyltrimethylammonium bromide (CTAB) with a concentration of 50mMol to 15ml with distilled water, and inject it into Put 45ml of copper sulfate solution of 0.038g hydrazine hydrate (80%) in a 100ml three-necked flask, and pass nitrogen gas for 10 minutes to eliminate the oxygen dissolved in the reactor and the solution; then use 5ml of a certain concentration of copper sulfate solution with Add the syringe dropwise into the reducing agent, stir vigorously, and reflux at 70°C for 1 hour to prepare nano-copper particles, which are added to acetone to form a 1wt% uniform solution...

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Abstract

The invention belongs to the technical field of preparation of a functional composite material, and particularly relates to a preparation method of a block macromolecule-nanometer metallic-film composite conductive material. According to the invention, a coated nanometer metal is formed into a uniformly-distributed pattern structure by designing the structural parameters, namely chain segment composition, chain segment length and total molecular weight, of a block macromolecule and adopting a principle that a two-phase nanometer structure is generated through phase separation generated by utilizing the polarity difference and incompatibility of two chain segments contained in the block macromolecule, and the uniformly-distributed pattern structure has an induction effect, so that a uniformly conductive continuous network is generated; nanometer metal silver is compounded with the amphipathic block macromolecule, and the nanometer metal silver is embedded into the amphipathic block macromolecule; and metal is made into nanometer-level forms and is uniformly dispersed into the amphipathic block macromolecule. The preparation method disclosed by the invention has the advantages of simple preparation process,safe and reliable principle,good property of the prepared material, environment-friendly preparation and wide application range.

Description

Technical field: [0001] The invention belongs to the technical field of preparation of functional composite materials, and relates to a preparation process of an amphiphilic block polymer-nano-metal thin layer flexible composite conductive material, in particular to a preparation method of a nano-composite conductive material. Background technique: [0002] The main feature of nanocomposites (Nanocomposites) is that one component in the composite system has at least one dimension and is uniformly dispersed in another component as a matrix at a nanometer size (≤100nm). The polymer-based conductive composite material brings a variety of functional additions, so that the resulting composite material has both the flexibility of the polymer material and the conductivity of the conductive filler. More importantly, this type of composite material can also exhibit some new electrical properties, such as nonlinear electrical conductivity. A single polymer material has good flexibili...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D153/00C09D5/24C08F293/00
Inventor 唐建国熊磊刘继宪王瑶王媛朱乾黄林军黄震
Owner QINGDAO UNIV
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