李同生
从事固体润滑及特种润滑材料研究,主要是聚合物摩擦学研究和自润滑材料的应用开发。
个性化签名
- 姓名:李同生
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学术头衔:
博士生导师
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学科领域:
材料科学
- 研究兴趣:从事固体润滑及特种润滑材料研究,主要是聚合物摩擦学研究和自润滑材料的应用开发。
李同生,男,1953年6月生,河北省新城县人。1977年中国科学技术大学近代化学系毕业,以日本学术振兴会邀请高级访问学者等名义于82年、90年、95年和98年4次赴日本东北大学等单位进行合作研究累计3年余。在中国科学院兰州化学物理研究所从事科研工作,先后担任研究室主任,特种润滑材料研究开发中心主任、副所长及研究员(1996)、博士生导师(1998)。先后承担和主持完成包括国家“八五”和“九五”和“十五”重大攻关项目、中科院重大基金,教育部重大攻关项目以及院地合作大型开发项目等25个课题项目。
兼职:兰州市青联副主席(科技),甘肃省科协委员,甘肃省摩擦学会副会长,中国科学院特种新材料专家组组长,科工委非金属材料评审专家,中国科学院中日交流协会理事,中国塑协氟塑料加工委员会常务理事;上海浦东科技协会评审专家,863评审专家,聚合物分子工程教育部重点实验室学委会委员,上海市新材料协会常务理事,以及《合成材料》,《摩擦学学报》,《塑料加工与应用》等刊物编委。
从事固体润滑及特种润滑材料研究27年,先后承担和主持完成包括国家重大攻关项目、中科院重大基金、教育部重大课题以及院地合作大型开发项目等30余个课题。在聚合物摩擦学研究和自润滑材料的应用开发方面具有丰富的知识和研究工作积累,是润滑学科的学术带头人之一。首次提出“PTFE的带状磨屑形成机理”,系统研究了取向PTFE摩擦学特性;首次实验证明了SiO2在水中具 有超低摩擦性。在国内率先开展了“镶嵌固体润滑剂轴承材料”、“PTFE纤维织物自润滑材料”及“含氟塑料防粘耐磨涂层”等新型特种润滑材料的系统性研究。取得了大量具有使用价值的研究成果,为成功解决长征3号火箭的齿轮润滑干膜难题做出了重要贡献。主持研制的织物自润滑轴套、自润滑衬垫及关节轴承等取得了重大进展。先后获得国家科技进步奖二等奖1项、中国科学院重大成果奖,国家发明奖三等奖1项、中国科学院自然科学奖一等奖1项。省部级鉴定成果6项。在国内外发表论文130余篇,申请国内外专利17项。
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李同生, 田农, 刘旭军, 刘维民
工程塑料应用,1999,27(10):24-26,-0001,():
-1年11月30日
用MM-200型摩擦磨损试验机考察了辐照对酚酞聚芳醚酮(PEK-C)摩擦磨损性能的影响。结果表明辐照可改善PAEK-c的摩擦磨损性能。当辐照剂量从5×104 Gy升到1×107Gy时,PAEK-C摩擦系数和磨损率均降低红外光谱与XPS分析表明,PAEK-C样品在辐照后无明显的变化。电镜分析表明,未辐照样品的磨屑大于辐照后样品的磨屑,未辐照样品的磨损表面犁沟较明显,而辐照后样品的磨损表面无犁沟槽,且表面比较光滑。
酚酞聚芳醚酮 辐照 摩擦磨损
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【期刊论文】Mechanical and tribological properties of PA/PPS blends☆
李同生, Zhaobin Chen, Tongsheng Li*, Yuliang Yang, Xujun Liu, Renguo Lv
Z. Chen et al/Wear 257 (2004) 696-707,-0001,():
-1年11月30日
Polymer blending is a very important and widely used method for the modification of polymer materials. The mechanical properties, miscibility and modification mechanisms of blends have been investigated earlier. However, studies of their tribological behavior have been few, and little attention has been paid to the friction and wear mechanisms of polymer blends. In this paper, the structure, mechanical and tribological properties of polyamide 66 (PA66) and polyphenylene sulfide (PPS) blends were studied. It was found that the PA66/PPS blends had a two-phase structure; the blend with 30 vol.% PPS exhibited the best general mechanical properties; 80 vol.% PA66-20 vol.% PPS blend had the lowest wear. Differential scanning calorimetry (DSC) and Fourier transform infrared spectrometry (FT-IR) analyses were carried out and the transfer films on the mating steel surfaces were investigated by scanning electron microscopy (SEM) and energy dispersive spectrometer (EDS). The results indicated that the crystalline structure of PA66, PPS and PA66/PPS blends changed due to sliding and tribochemical reactions occurred with the PA66 and the PA66 phases in blends. The thermal control of friction model is applicable to this blend system, i.e. the friction coefficient of PA66/PPS blends depended on the PA66 component with lower melting point, while the wear properties were governed by the adhesive ability between the PPS and the counterface.
PA/, PPS blends, Tribology, Transfer film, FT-IR, Thermal control of friction
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【期刊论文】A study on the friction properties of PAAc hydrogel under low loads in air and water
李同生, Xujun Liu a, Hidetaka Nanao a, Tongsheng Li b, Shigeyuki Mori a, *
X. Liu et al/Wear 257(2004)665-670,-0001,():
-1年11月30日
The friction properties of poly (acrylic acid)(PAAc) hydrogel have been studied under low loads using a ball-on-plate friction tester. And the influences of atmospheres, load, water contents of the polymers and its surface morph have been investigated. It is found that the friction coefficient of hydrogels is obviously lower in water than in air. The friction coefficient of PAAc hydrogel decreases as the load increases, and the effect is more conspicuous under low load. The friction property of polymer hydrogels depends on the water content of it, namely, the higher the water content, the lower the friction coefficient. The dimpled surface of PAAc hydrogel can effectively lead to a low friction coefficient. There is the balance of mechanical contact and water contact with slider surface is important for hydrogel lubrication.
PAAc, Polymer hydrogel, Friction, Dimpled surface
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