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中國工程物理研究院 激光聚變研究中心,四川 綿陽 621900
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國家自然科學(xué)基金(10804101);等離子體物理國防科技重點實驗室基金(9140C680502100C68);國家重點基礎(chǔ)研究發(fā)展計劃項目(2007CB815102)


Research Center of Laser Fusion, China Academy of Engineering Physics, Mianyang 621900, China
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    摘要:

    以聚苯乙烯微球(PS)為模板,采用“種子-生長”法在聚苯乙烯微球表面直接鍍覆具有自支撐性的金殼層,成形熱處理去除PS模板,成功制備出空心微球結(jié)構(gòu)圓柱形塊體的泡沫金樣品,并對其制備工藝進行了研究。研究表明:平均晶粒尺寸為4.6 nm的金納米粒子通過靜電作用可成功粘附于交聯(lián)聚苯乙烯微球(PS-DVB)表面?;瘜W(xué)鍍時以粘附的金納米粒子為種子繼續(xù)生長,沉積的金顆粒細小而致密,粒徑主要分布于30~60 nm,且微球表面金沉積層的包覆率高,包覆厚度70~90 nm,PS模板去除后金沉積層具有良好的自支撐性。采用類似粉漿鑄造工藝使gold/PS有孔隙地隨機堆積成型,熱處理去除聚苯乙烯模板后可成功獲得圓柱體形狀的泡沫金樣品。制備的泡沫金由直徑8~9 μm的空心球殼組成,圓柱體直徑約4 mm,密度約1.5 g/cm3,孔隙率高達92%。

    Abstract:

    The monolithic foamed gold was synthesized by seed-mediated growth with polystyrene (PS) template and casting procedure and heat treatment. The results indicate that the PS could be coated by gold colloid with average grain size of 4.6 nm which was made in toluene by the electrostatic effect. The deposited gold with thickness of 70-90 nm and grain size of 30-60 nm were obtained by electroless plating. It can be self-supported after the template removing. The casting procedure is analogous to slip-casting of ceramic that results in randomly-packed PS/Au spheres with void spaces between individual particles. The columniform foamed gold with hollow spheres of 8-9 μm, diameter of 4 mm, density of 1.5 g/cm3, and porosity of 92% was obtained after heat treatment.

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譚秀蘭,牛 高,李 愷,羅江山,吳衛(wèi)東,唐永建.中國工程物理研究院 激光聚變研究中心,四川 綿陽 621900[J].稀有金屬材料與工程,2012,41(1):169~172.[Tan Xiulan, Niu Gao, Li Kai, Luo Jiangshang, Wu Weidong, Tang Yongjian. Research Center of Laser Fusion, China Academy of Engineering Physics, Mianyang 621900, China[J]. Rare Metal Materials and Engineering,2012,41(1):169~172.]
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  • 收稿日期:2011-01-15
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