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Method for preparing silver nanowires
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A technology of silver nanowires and silver salts, which is applied in the field of nanomaterials to achieve the effects of high reproducibility, strong controllability, and uniform size and shape
Active Publication Date: 2015-03-25
苏州恒拓服饰有限公司
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[0005] Abandoning traditional surfactants, adopting a combination of polyol method and solvothermal method, using the unique protective function of micellar self-assembly of amphiphilic hyperbranched polymers, to realize the controllable synthesis of silver nanowires, which has not been reported so far
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[0035]Dissolve 6.0 mL of oleoyl chloride in 40 mL of ether, 2 g of hyperbranched polyglycidyl ether in 40 mL of methanol, and drop the obtained oleoyl chlorideether solution dropwise into the methanol solution of hyperbranched polyglycidyl ether, and stir for 56 hours under ice bath , rotary evaporation at 50°C to remove excess solvent, and wash with ethyl acetate to remove excess oleoyl chloride to obtain amphiphilic hyperbranched polyglycidyl ether.
[0036] Take 108 mg of amphiphilic hyperbranched polyglycidyl ether and dissolve it in 50 ml of ethylene glycol to obtain mixed solution A. Add 5.6mg of anhydrousferric chloride and 0.45g of silver nitrate to the mixed solution A in sequence, and stir until the metal salt is completely dissolved to obtain the mixed solution C. The mixed solution C was transferred to a hydrothermal reaction kettle, and reacted at 170°C for 100 min. After natural cooling, the crude product was taken out, washed repeatedly with chloroform and abs...
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Abstract
The invention discloses a method for preparing silver nanowires. The silver nanowires are prepared controllably by the self-assembly characteristic of micelle of amphiphilic hyperbranched polymer. The method comprises the following specific steps of dissolving or dispersing the amphiphilic hyperbranched polymer in polyhydric alcohol; adding halogenous inorganic salt or sulfurated inorganic salt in the mixture; adding silver salt in the mixture after the halogenous inorganic salt or sulfurated inorganic salt is dissolved in the mixture completely; placing obtained mixed solution in a sealed reaction kettle; performing constant-temperature reaction at a certain temperature in a range of 120-240 DEG C; naturally cooling down a reaction product to obtain raw products of silver nanowires; and washing the raw products by using organic solvent and centrifugally separating the raw products to obtain the silver nanowires. A one-kettle solvothermal method is used, the amphiphilic hyperbranched polymer is used for preparation of the silver nanowires, and the silver nanowires with uniform sizes and morphologies can be obtained. The steps of the method are simple and are easy to operate; the controllability and the reproducibility are high; and the silver nanowires are easily produced in batches.
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