Research Progress of Electromagnetic Shielding Wood-based Conductive Materials
WANG Li1,2, WANG Zhe1, NING Guoyan1, SHEN Yulin1, WANG Ximing1
1 College of Material Science and Art Design, Inner Mongolia Agricultural University, Hohhot 010018; 2 InstrumentalAnalysis Center, Inner Mongolia University of Science and Technology, Baotou 014010
Abstract: The rapid development of electronic products has brought endemic and hazardous electromagnetic effects, such as cumulative thermal effect and vibration effect. Moreover, free propagation of electromagnetic waves in a non-medium condition easily causes information leakage and interference to other electronic equipment’s normal operation. The traditional electromagnetic shielding material can alleviate or eliminate the negative consequences of electromagnetic effects, but nevertheless displays many disadvantages, such as complicated production process, serious indirect pollution and single shielding mechanism. Macroscopically, wood is an important ecological and environmental friendly natural materials with the functions of renewability, ability of immobilizing carbon, ease of processing, heat insulation, sound absorbing and insulation, as well as the advantages of degradability, recyclability, good environmental compatibility, high strength ratio, etc. Microscopically, wood has the multi-scale pore structure of nano-micro dimension, natural skeleton structure that can be used as template, rich porous channel surface active sites (a large number of carbon radical, free hydroxyl, carbonyl and carboxyl groups) which enables a series of physical and chemical modification. However, as a material, wood is anisotropic, insulating, easy to dry, shrink, dilate, deform and rot, so its effective utilization rate is greatly suppressed and its application scope is encumbered. Many scholars regarded wood as a template matrix, and combined them in various forms with conductive materials, making composite structure materials with electromagnetic shielding abi-lity, wood advantages, weakening their defects, and it is a promising research method. Preparation methods of wood based conductive composite include coating method, filling method, carbonization crystallization method and nanomaterial composing method. The coating method combines different metal with nonmetal elements by chemical vapor deposition and ion sputtering, loads them on wood surface, and the resultant composites have high surface resistivity and simple binding mechanism. This method is easy to operate, but requires some pre-treatment processes (e.g. sensitization, oil removal, activation), and tend considerably to cause coating spalling and surface-reflection-induced secondary pollution. The filling method is a method of stacking and mixing metal mesh, metal fiber, conductive adhesive, metal complex, conductive polymer and wooden unit. It has many disadvantages such as uneven distribution of conductive components, low conductivity and narrow screen band. Carbonization and crystallization refers to obtaining porous material by calcining wood under oxygen-free atmosphere (nitrogen protection) and then pouring metal conductive materials, it is relatively high-cost, technological complexity and low shielding effectiveness of the resultant composite materials. The method of nano-material composing is to compounding nanosized cellulose, hemicellulose and lignin with certain conductive substance by in situ polymerization. But the conductive component is easy to agglomerate, and the pro-ducts’ absorption bandwidth and shielding effectiveness are unfavorable. Therefore, the further research directions of wood-based conductive composites are higher absorptivity, wider bandwidth, functionalization and green renewability. Based on the above content, in consideration of porous channel, rich hydroxyl, carboxyl active functional groups of wood and electrical conductivity of different conductive components, this paper mainly introduces the essence of electrical conductivity, preparation method, mechanism of electromagnetic shielding, characterization of composite materials’ conductivity, and elaborates the anti-static, electromagnetic shielding, photoelectric and medical applications, both with respect to the worldwide research of wood-based conductive composites.
1 Vizia G N, Vandenbosch G A E. Building materials and electromagnetic radiation: The role of material and shape[J].Journal of Building Engineering,2016,5:96. 2 Mondala S, Nayaka L, Rahaman M, et al. An effective strategy to enhance mechanical, electrical, and electromagnetic shielding effectiveness of chlorinated polyethylene-carbon nanofiber nanocompo-sites[J].Composites Part B: Engineering,2017,109:155. 3 Wang Chang, Huang Jianbai. The changes in strategic situation of China’s metal resources and the adjustment of the industrial policy[J].China Population, Research Sources and Environment,2014,24(171):391(in Chinese). 王昶,黄健柏.中国金属资源战略形势变化及其产业政策调整研究[J].中国人口·资源与环境,2014,24(171):391. 4 Wang Zhe, Wang Ximing. Research progress of multi-scale pore structure and characterization methods of wood[J].Scientia Silvae Sinicae,2014,50(10):123(in Chinese). 王哲,王喜明.木材多尺度孔隙结构及表征方法研究进展[J].林业科学,2014,50(10):123. 5 Chen G H, Huang S W, Yi X S. Progress in performance testing method of electromagnetic shielding and absorbing materials[J].Ordnance Material Science and Engineering,2010,33(2):103. 6 Liang H W, Guan Q F, Zhu Z, et al. Highly conductive and stretc-hable conductors fabricated from bacterial cellulose[J].NPG Asia Mater,2012,4:19. 7 Hemanth J. Quartz(SiO2P) reinforced chilled mrtal matrix composite for automotive applications[J].Materials and Design,2009,30:323. 8 Carlquist S. Wood anatomy of brassicales: New information, new evolutionary concepts[J].The Botanical Review,2016,82(1):24. 9 Arnould O, Arinero R. Towards a better understanding of wood cell wall characterisation with contact resonance atomic force microscopy[J].Composites Part A: Applied Science and Manufacturing,2015,74:69. 10 Du Xu, Zhang Zhe, Liu Wei, et al. Nanocellulose-based conductive materials and their emerging applications in energy devices—A review[J].Nano Energy,2017,35:29. 11 Trey S, Jafarzadeh S, Johansson M. In-situ polymerization of polyaniline in veneers[J].ACS Applied Materials and Interfaces,2012,4(3):1760. 12 Lv Shaoyi, Fu Feng, Chang Huanjun, et al. Microstructure and conductivity properties of flexible conductive wood slices[J].China Wood Industry,2016,30(6):5(in Chinese). 吕少一,傅峰,常焕君,等.柔性导电薄木的微观结构与导电性能研究[J].木材工业,2016,30(6):5. 13 Yao Xiaolin, Xu Gaoxiang, Liu Shengquan. The research of preparation and properties of nickel wood composites[J].Journal of Functional Materials,2013,44(13):1964(in Chinese). 姚晓林,徐高祥,刘盛全.金属镍木材复合材料的制备及其性能研究[J].功能材料,2013,44(13):1964. 14 Weng Li,Min Yonggang. New research progress of electromagnetic shielding and absorbing composites based on graphene[J].Journal of Functional Materials,2017,48(12):12041(in Chinese). 翁立,闵永刚.石墨烯基吸波复合材料的研究新进展[J].功能材料,2017,48(12):12041. 15 Fishchuk I I, Kadashchuk A, Hoffmann S T, et al. Analytic model of hopping transport in organic semiconductors including both energetic disorder and polaronic contributions[J].Proceedings,2014,1610:47. 16 Li Zhihua, Sun Jian, Ke Yupeng. Progress in research on conduction mechanisms of conductive adhesive[J].Polymer Bulletin,2009(7):53(in Chinese). 李芝华,孙健,柯于鹏.导电胶粘剂的导电机理研究进展[J].高分子通报,2009(7):53. 17 Pedro M, Graca F, Rudnitskaya A, et al. Electrochemical impedance study of the lignin-derived conducting polymer[J].Electrochimica Acta,2016,76:69. 18 Radzuan N A M, Zakaria M Y, Sulong A B,et al. The effect of milled carbon fibre filler on electrical conductivity in highly conductive polymer composites[J].Composites Part B Engineering,2017,110:153. 19 Shen Lie, Xu Jianwen,Yi Xiaosu. Resistivity temperature depen-dence of PE-carbon-black composites mixed with carbon fiber[J].Acta Materiae Compositae Sinica,2001,18(3):20(in Chinese). 沈烈,徐建文,益小苏.聚乙烯/炭黑/碳纤维复合材料阻温特性[J].复合材料学报,2001,18(3):20. 20 Di W, Zhang G, Xu J, et al. Positive temperature coefficient/negative temperature coefficient effect of low-density polyethylene filled with a mixture of carbon black and carbon fiber[J].Journal of Polymer Science Part B-Polymer Physics,2003,41(23):3094. 21 Nenashev A V, Jansson V, Oelerich J O, et al. Advanced percolation solution for hopping conductivity[J].Physical Review B Condensed Matter,2013,87(23):235204. 22 Fan Lina. The conductivity and mechanism of iodine-doped carbon nano tube-conjugated polymer composites[D].Shanghai:East China Normal University,2016(in Chinese). 樊丽娜.碘掺杂碳纳米管-共轭高分子复合材料的导电性和导电机理探究[D].上海:华东师范大学,2016. 23 Yang Hui. Design of the conductive network in conductive polymer composites and its effect on electrical properties[D].Hangzhou:Zhejiang University,2010(in Chinese). 杨辉.导电高分子复合材料的导电网络构筑与性能[D].杭州:浙江大学,2010. 24 Sharma A, Bakis C E, Wang K W. A new method of chaining carbon nanofibers in epoxy[J].Nanotechnology,2008,19(32):325606. 25 Hui Bin, Li Jian, Wang Lijuan. Microstructure and electrical conductivity of flexible wood slice/nano carbon material composite electrode material[J].Wood Science Technology,2014,48:961. 26 Lv Shaoyi, Fu Feng, Guo Limin, et al. Microstructure and conductivity properties of flexible conductive wood slices[J].Scientia Silvae Sinicae,2016,30(6):5(in Chinese). 吕少一,傅峰,郭丽敏,等.柔性薄木/纳米碳材料复合电极的微观结构与电导性能[J].林业科学,2017,53(11):150. 27 Wan Caichao, Jiao Yue, Li Jian. In situ deposition of graphene nanosheets on wood surface byone-pot hydrothermal method for enhanced UV-resistant ability[J].Applied Surface Science,2015,347:891. 28 Wang Jiande, Peng Tongjiang, Sun Hongjuan, et al. Effect of the hydrothermal reaction temperature on three-dimensional reduced graphene oxide’s appearance, structure and super capacitor perfor-mance[J].Journal of Physical Chemistry,2014,30(11):2077(in Chinese). 汪建德,彭同江,孙红娟,等.水热反应温度对三维还原氧化石墨烯的形貌、结构和超级电容性能的影响[J].物理化学学报,2014,30(11):2077. 29 Lacroix M, Nguyen P, Schweich D, et al. Pressure drop measurements and modeling on SiC foams[J].Chemical Engineering Science,2007,62(12):3259. 30 Zhang Yaoli, Xia Jinwei, Wang Junfeng. A review of methods of opening wood cell pathways[J].Journal of Anhui Agricultural University,2011,38(6):867(in Chinese). 张耀丽,夏金尉,王军锋.开启木材细胞通道的途径[J].安徽农业大学学报,2011,38(6):867. 31 Xia Jinwei, Zhang Yaoli, Cai Jiabin. Opening cell pathways of larch wood by steam explosion[J].Journal of Fujian Agriculture and Fore-stry University (Natural Science Edition),2013,42(9):543(in Chinese). 夏金尉,张耀丽,蔡家斌.蒸汽爆破开启落叶松木材细胞通道[J].福建农林大学学报(自然科学版),2013,42(9):543. 32 Olson K R, Al-Kaisi M M. The importance of soil sampling depth for accurate account of soil organic carbon sequestration, storage, retention and loss[J].Catena,2015,125:33. 33 Liu Xianmiao, Fu Feng. Composition of metal fiber and wood veneer[J].Forestry Machinery & Woodworking Equipment,2008,36(11):27(in Chinese). 刘贤淼,傅峰.金属纤维与木单板的复合[J].林业机械与木工设备,2008,36(11):27. 34 Yao Xiaolin, Xu Gaoxiang, Liu Shengquan. Research of preparation and mechanical properties of copper-wood composites[J].New Chemical Materials,2013,41(7):139(in Chinese). 姚晓林,徐高祥,刘盛全.金属铜木材复合材料的制备及其力学性能研究[J].化工新型材料,2013,41(7):139. 35 Trey S, Jafarzadeh S, Johansson M. In situ polymerization of polyaniline in wood veneers[J].ACS Applied Materials & Interfaces,2012,4(3):1760. 36 Ohzawa Y, Cheng Xingun, Achiha T, et al. Electro-conductive po-rous ceramics prepared by chemical vapor infiltration of TiN[J].Journal of Materials Science,2008,43:2812. 37 Youssefa A M, Mohameda S A, Abdel-Aziz M S, et al. Biological studies and electrical conductivity of paper sheet based on PANI/PS/Ag-NPs[J].Carbohydrate Polymers,2016,147:333. 38 Fugetsu B, Sano E, Sunada M, et al. Electrical conductivity and electromagnetic interference shielding efficiency of carbon nanotube/cellulose composite paper[J].Carbon,2008,46(9):1256. 39 Teng Naiyu, Dallmeyer L, et al. Incorporation of multiwalled carbon nanotubes into electrospun softwood kraft lignin-based fibers[J].Journal of Wood Chemistry and Technology,2013,33:299. 40 Qu Zhaoming, Wang Qingguo. Development of conductive and magnetic shielding composites[J].Materials Review A: Review Papers,2011,25(1):138(in Chinese). 曲兆明,王庆国.导电导磁屏蔽复合材料的研究进展[J].材料导报:综述篇,2011,25(1):138. 41 Young S. Countermeasures to electromagnetic signal compromises[J].Information Security Science,2016,3:185. 42 Wang L L, Tay B K, See K Y, et al. Electromagnetic interference shielding effectiveness of carbon-based materials prepared by screen printing[J].Carbon,2009,47(8):1905. 43 Yuan Q, Lu K, Fu F. Process and structure of electromagnetic shielding plywood composite laminated with carbon fiber paper[J].Open Materials Science Journal,2014,8:99. 44 Huang H D, Liu C Y, Zhou D, et al. Cellulose composite aerogel for highly efficient electromagnetic interference shielding[J].Journal of Materials Chemistry A,2015,9:4983. 45 Cheng Y, Xu Y, Cai J, et al. Effect of the bio-absorbent on the microwave absorption property of the flaky CIPs/rubber absorbers[J].Journal of Magnetism & Magnetic Materials,2015,389:106. 46 Deng Meng. Study on the surface electric resistance of wooden doors decorated by decorative veneer based on electrostatic spraying[D].Beijing: Chinese Academy of Forestry,2016(in Chinese). 邓锰.基于静电喷涂的装饰薄木饰面木门表面电阻研究[D].北京:中国林业科学研究院,2016. 47 Sun Lili. Study on the preparation of wood-based electromagnetic shielding material via novel electroless planting methods[D].Harbin:Northeast Forestry University,2013(in Chinese). 孙丽丽.新型化学镀法制备木质电磁屏蔽材料的研究[D].哈尔滨:东北林业大学,2013. 48 Guo Xiaoyu. Preparation of conductive flexible-transparent film and electrode material with wood cellulose nanofibers as matrix[D].Harbin:Northeast Forestry University,2015(in Chinese). 郭晓宇.木质纳米纤维素为基质制备柔性透明导电膜和电极材料的研究[D].哈尔滨:东北林业大学,2015. 49 Kleber D. Electrostatic behaviour of wood and laminate floor cove-rings and current situation in standardisation[J].Journal of Electrostatics,2017,88:218. 50 Chang Delong, Xie Qing, Hu Weihua, et al. Wood with metal film of titanium-nickel magnetron-sputtered[J].Journal of Northeast Forestry University,2016,44(6):75(in Chinese). 常德龙,谢青,胡伟华,等.磁控溅射法薄木镀膜金属工艺参数的遴选[J].东北林业大学学报,2016,44(6):75. 51 Roesslera A, Schottenberger H. Antistatic coatings for wood-floo-rings by imidazolium salt-basedionic liquids[J].Progress in Organic Coatings,2014,77:579. 52 Tao X. Wearable electronics and photonics[J].Wearable Electronics & Photonics,2005,3:1. 53 Shi Changhong, Tang Zhaojun, Wang Li, et al. Preparation and characterization of conductive and corrosion-resistant wood-based composite by electroless Ni-W-P plating on birch veneer[J].Wood Science and Technology,2017,51(3):685. 54 He Wen, Li Jiping, Tian Jiaxi, et al. Characteristics and properties of wood/polyaniline electromagnetic shielding composites synthesized via in situ polymerization[J].Polymer Composites,2016,7:1. 55 Gan W, LiuY, Gao L, et al. Growth of CoFe2O4 particles on wood template using controlled hydrothermal method at low temperature[J].Ceramics International,2015,41(10):14876. 56 Al-Oqla F M, Sapuan S M, Anwer T, et al. Natural fiber reinforced conductive polymer composites as functional materials: A review[J].Synthetic Metals,2015,206:42. 57 Zhu M, Li T, Davis C, et al. Transparent and haze wood composites for highly efficient broadband light management in solar cells[J].Nano Energy,2016,26:332. 58 Choi K H, Cho S J, Chun S J, et al. Heterolayered, one-dimensional nanobuilding block mat batteries[J].Nano Letters,2014,14:5677. 59 Ummartyotin Sarute, Manuspiya Hathaikarn. An overview of feasibilities and challenge of conductive cellulose for rechargeable lithium based battery[J].Renewable and Sustainable Energy Reviews,2015,50:204. 60 Pandey Jitendra Kumar, Takagi Hitoshi, et al. An overview on the cellulose based conducting composites[J].Composites Part B Engineering,2012,43:2822. 61 Zhang Xiaodan, Lin Ziyin, Chen Bo, et al. Solid-state, flexible, high strength paper-based supercapacitors[J].Journal of Materials Che-mistry A,2013,1(19):5835. 62 Guo B, Glavas L, Albertsson A C. Biodegradable and electrically conducting polymers for biomedical applications[J].Progress in Polymer Science,2013,38(9):1263. 63 Ge Dongtao, Ru Xiaoning, Hong Shimin, et al. Coating metals on cellulose-polypyrrole composites: A new route to self-powered drug delivery system[J].Electrochemistry Communications,2010,12:1367.