纳米孔模板浸润法制备聚乙烯纳米线阵列的热导率的实验研究

曹炳阳; 董若宇; 孔杰; 陈恒; 徐雁; 容启亮; 蔡岸

doi:10.7498/aps.61.046501

摘要

采用纳米孔模板润湿技术制备了直径为200 nm的低密度聚乙烯(LDPE)纳米线阵列, 并利用纳秒激光闪光法测量了2080℃时LDPE纳米线阵列的热导率. 测量得到室温时LDPE纳米线阵列的热导率为2.2 W/mK, 大约比其体材料的热导率高1个数量级, 并且纳米线阵列的热导率随温度的升高略有增加. 忽略纳米线之间的声子散射, 估算得到室温下单根LDPE纳米线的热导率高于5 W/mK. 本文制备LDPE纳米线热导率的提高源自其分子链定向度增加导致的低维导热效应的增强, 纳米线的分子链定向度受工艺过程中流体剪切、振动、分子链迁移运动、纳米孔约束等几种因素的综合影响.

关键词:

Abstract

We fabricate low-density polyethylene (LDPE) nanowire array with a diameter of 200 nm by using a nanoporous template wetting technique, and the thermal conductivity at 2080℃ is experimentally studied by a nanosecond laser flash method. The measured thermal conductivity of the fabricated nanowire array is about 2.2 W/mK at room temperature, which is about one order of magnitude higher than its bulk counterpart. The thermal conductivity is found to increase slightly with the increase of temperature. The estimated thermal conductivity of a single LDPE nanowire is as high as 5 W/mK at room temperature. The high orientation of chain of the LDPE nanowire may arise from the integrative effects of shear rate, vibrational perturbation, translocation, nanoconfinement and crystallization. Findings in this study provide a useful strategy for enhancing the intrinsic thermal properties of polymer nanostructures.

Keywords:

作者及机构信息

1.
清华大学工程力学系热科学与动力工程教育部重点实验室, 北京 100084;

2.
西北工业大学理学院应用化学系, 西安 710072;

3.
香港理工大学工业系统工程系, 香港九龙红磡;

4.
中国科学院上海硅酸盐研究所, 上海 200050

基金项目: 国家自然科学基金(批准号: 50976052, 51136001), 新世纪优秀人才支持计划, 教育部春晖计划科研合作项目(批准号: Z2009-1-71004), 航空科学基金(批准号: 2009ZH53073)和香港研究资助局(批准号: PolyU 5347/08E)资助的课题.

Authors and contacts

1.
Key Laboratory for Thermal Science and Power Engineering of Ministry of Education, Department of Engineering Mechanics, Tsinghua University, Beijing 100084, China;

2.
Department of Applied Chemistry, School of Science, Northwestern Polytechnical University, Xi’an 710072, China;

3.
Department of Industrial and Systems Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, China;

4.
Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China

Funds: Project supported by the National Natural Foundation of China (Grant Nos. 50976052, 51136001), the Program for New Century Excellent Talents in University, the Chun Hui Program of State Education Ministry (Grant No. Z2009-1-71004), the Aero-Science Foundation of China (Grant No. 2009ZH53073), and the Funding from the Hong Kong Research Grants Council (Grant No.PolyU 5347/08E).

参考文献

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[6]	Cao B Y, Li Y W 2010 J. Chem. Phys. 133 024106
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[15]	Choy C L, Fei Y, Xi T G 1993 J. Polymer Sci. B: Polymer Phys. 31 365
[16]	Choy C L, Wong Y W, Yang G W, Kanamoto T 1999 J. Polymer Sci. B: Polymer Phys. 37 3359
[17]	Fujishiro H, Ikebe M, Kashima T, Yamanaka A 1998 Jpn. J. Appl. Phys. 37 1994
[18]	Liu J, Yang R G 2010 Phys. Rev. B 81 174122
[19]	Shen S, Henry A, Tong J, Zheng RT, Chen G 2010 Nature Nanotech. 5 251
[20]	Steinhart M, Wendorff JH, Greiner A,Wehrspohn RB, Nielsch K, Schilling J, Choi J, Gosele U 2002 Science 296 1997
[21]	Kong J, Xu Y, Yung K L, Xie YC, He L 2009 J. Phys. Chem. C 113 624
[22]	Rendon S, Burghardt WR, Auad M L, Kornfield J A 2007 Macromolecules 40 6624
[23]	Xie H Q, Cai A, Wang X W 2007 Phys. Lett. A 369 120
[24]	Abdalla M, Dean D, Theodore M, Fielding J, Nyairo E, Price G 2010 Polymer 51 1614
[25]	Absi J, Smith D S, Nait-Ali B, Grandjean S, Berjonnaux J 2005 J. Euro. Ceram. Soc. 25 367
[26]	Degiovanni A 1977 Rev Gen Therm (France) 185 420
[27]	Lepri S, Livi R, Politi A 2003 Phys. Rep. 377 1
[28]	Dhar A 2008 Adv. Phys. 57 457
[29]	Venerus D C, Schieber J D, Balasubramanian V, Bush K, Smoukov S 2004 Phys. Rev. Lett. 93 098301
[30]	Marencic A P, Adamson D H, Chaikin P M, Register R A 2010 Phys. Rev. E 81 011503
[31]	Meller A 2003 J Phys: Condens Matter 15 R581
[32]	Garcia-Gutierrez M C, Linares A, Hernandez J J, Rueda J J, Ezquerra T A, Poza P, Davies R J 2010Nano Lett. 10 1472
[33]	Mahanandia P, Schneider J J, Khaneft M, Stuhn B, Peixoto T P, Drossel B 2010 Phys. Chem. Chem. Phys. 12 4407

施引文献

[1]	Wang R Y, Segalman R A, Majumdar A 2006 Appl. Phys. Lett. 89 173113
[2]	Jin J Z, Manoharan M P, Wang Q, Haque M A 2009 Appl. Phys. Lett. 95 033113
[3]	Losego M D, Moh L, Arpin K A, Cahill D G, Braun P V 2010 Appl. Phys. Lett. 97 011908
[4]	Chen G 2000 Int. J. Thermal Sci. 39 471
[5]	Liang X G 2007 Chin. Sci. Bull. 52 2457
[6]	Cao B Y, Li Y W 2010 J. Chem. Phys. 133 024106
[7]	Wang Z L, Guo L J, Tang D W, Zhu Y T 2008 Acta Phys. Sin. 57 3391 (in Chinese) [王照亮, 梁金国, 唐大伟, Zhu Y T 2008 物理学报 57 3391]
[8]	Hou Q W, Cao B Y, Guo Z Y 2009 Acta Phys. Sin. 58 7809 (in Chinese) [侯泉文, 曹炳阳, 过增元 2009 物理学报 58 7809]
[9]	Jin W, Hui N J, Qu S X 2011 Acta Phys. Sin. 60 016301 (in Chinese) [金蔚, 惠宁菊, 屈世显 2011 物理学报 60 016301]
[10]	Bao Z G, Chen Y P, Ouyang T, Yang K K, Zhong J X 2011 60 028103 (in Chinese) [鲍志刚, 陈元平, 欧阳滔, 杨凯科, 钟建新 2011 物理学报 60 028103]
[11]	Huxtable ST, Cahill DG, Shenogin S, Xue LP, Ozisik R, Barone P, Usrey M, Strano MS, Siddons G, Shim M, Keblinski P 2003 Nature Mater. 2 731
[12]	Henry A, Chen G 2008 Phys. Rev. Lett. 101 235502
[13]	Henry A, Chen G 2009 Phys. Rev. B 79 144305
[14]	Wang Z H, Carter J A, Lagutchev A, Koh Y K, Seong N H, Cahill D G, Dlott D D 2007 Science 317 787
[15]	Choy C L, Fei Y, Xi T G 1993 J. Polymer Sci. B: Polymer Phys. 31 365
[16]	Choy C L, Wong Y W, Yang G W, Kanamoto T 1999 J. Polymer Sci. B: Polymer Phys. 37 3359
[17]	Fujishiro H, Ikebe M, Kashima T, Yamanaka A 1998 Jpn. J. Appl. Phys. 37 1994
[18]	Liu J, Yang R G 2010 Phys. Rev. B 81 174122
[19]	Shen S, Henry A, Tong J, Zheng RT, Chen G 2010 Nature Nanotech. 5 251
[20]	Steinhart M, Wendorff JH, Greiner A,Wehrspohn RB, Nielsch K, Schilling J, Choi J, Gosele U 2002 Science 296 1997
[21]	Kong J, Xu Y, Yung K L, Xie YC, He L 2009 J. Phys. Chem. C 113 624
[22]	Rendon S, Burghardt WR, Auad M L, Kornfield J A 2007 Macromolecules 40 6624
[23]	Xie H Q, Cai A, Wang X W 2007 Phys. Lett. A 369 120
[24]	Abdalla M, Dean D, Theodore M, Fielding J, Nyairo E, Price G 2010 Polymer 51 1614
[25]	Absi J, Smith D S, Nait-Ali B, Grandjean S, Berjonnaux J 2005 J. Euro. Ceram. Soc. 25 367
[26]	Degiovanni A 1977 Rev Gen Therm (France) 185 420
[27]	Lepri S, Livi R, Politi A 2003 Phys. Rep. 377 1
[28]	Dhar A 2008 Adv. Phys. 57 457
[29]	Venerus D C, Schieber J D, Balasubramanian V, Bush K, Smoukov S 2004 Phys. Rev. Lett. 93 098301
[30]	Marencic A P, Adamson D H, Chaikin P M, Register R A 2010 Phys. Rev. E 81 011503
[31]	Meller A 2003 J Phys: Condens Matter 15 R581
[32]	Garcia-Gutierrez M C, Linares A, Hernandez J J, Rueda J J, Ezquerra T A, Poza P, Davies R J 2010Nano Lett. 10 1472
[33]	Mahanandia P, Schneider J J, Khaneft M, Stuhn B, Peixoto T P, Drossel B 2010 Phys. Chem. Chem. Phys. 12 4407

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