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Preparation of Ni nanoparticles by liquid-phase reduction to fabricate metal nanoparticle–polyimide composite films

机译:液相还原制备金属纳米粒子-聚酰亚胺复合膜制备镍纳米粒子

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Nickel-nanoparticle-containing polyimide composite films were prepared by liquid-phase reduction of Ni ~(2+) ions with potassium borohydride (KBH _(4) ). The nanoparticles were amorphous with diameters of approximately 10–20 nm, depending on the KBH _(4) concentration and reduction temperature. At high KBH _(4) concentrations, the nanoparticles appeared to contain various nickel boride species. The number of nanoparticles and Ni content both increased upon repeated adsorption/reduction of Ni ~(2+) ions, where the particle growth was inhibited by the rigid polymer chain and the formation of smaller particles was favored.
机译:通过用硼氢化钾(KBH _(4))液相还原Ni〜(2+)离子制备含镍-纳米颗粒的聚酰亚胺复合膜。纳米粒子是无定形的,直径大约为10–20 nm,这取决于KBH_(4)的浓度和还原温度。在高KBH_(4)浓度下,纳米颗粒似乎包含各种硼化镍物质。重复吸附/还原Ni〜(2+)离子后,纳米颗粒的数量和Ni含量均增加,其中刚性聚合物链抑制了颗粒的生长,有利于形成较小的颗粒。

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