以水曲柳单板为基材,利用 NaBH4处理后直接化学镀Ni-Cu-P三元合金制备木质电磁屏蔽复合材料。研究了NaBH4浓度、浸渍时间和施镀时间对金属沉积量和表面电阻率的影响。分别用扫描电镜(SEM)和X射线衍射(XRD)分析了复合材料的表面形貌和组织结构,用低电阻测定仪和频谱仪测定了复合材料的表面电阻率和电磁屏蔽效能,用直拉法测定了镀层附着强度。结果表明,利用3 g/L的NaBH4溶液,前处理8 min,施镀时间25 min,此条件制备的复合材料的金属沉积量为113 g/m2,表面电阻率为318 mΩ/cm2。SEM观察发现镀层均匀、连续和致密,镀后木材单板具有显著的金属光泽。XRD分析表明镀层为微晶结构,且镀层与木材结合牢固。在频率为9 kHz~1.5 GHz 范围内,施镀单板的电磁屏蔽效能在55~60 dB范围内。
Electromagnetic shielding wood-based composite was prepared by direct electroless Ni-Cu-P plating on fraxinus mandshurica veneer as substrate pretreated with NaBH4 .The effects of NaBH4 concentration,immer-sion time and plating time on metal deposition and surface resistivity were investigated.The morphology and structure of the composite were analyzed by using scanning electron microscopy (SEM)and X-ray diffraction (XRD).Low-resistance measuring instrument and spectrum analyzer were used for measuring surface resistivi-ty and electromagnetic shielding effectiveness.The adhesion strength of layer was measured by vertical pulling method.The results show that the metal deposition and surface resistivity of the composite was 1 1 3 g/m2 and 3 1 8 mΩ/cm2 ,respectively,when the composite was prepared under the conditions that the substrate was trea-ted in 3 g/L NaBH4 solution for 8 min and plated for 25 min.SEM analysis indicates that the layer deposited was uniform,continuous and compact,and the surface of the plated veneer has obvious metallic sheen.XRD a-nalysis indicates that the layer deposited is microcrystalline state,and the adhesion strength between the layer and wood surface is very firm.The plated veneer exhibits electromagnetic shielding effectiveness around 55-60 dB in frequencies from 9 kHz to 1.5 GHz.
参考文献
| [1] | Nagasawa C;Kumagai Y;Urabe K .Electromagnetic shielding effectiveness particles board containing nickel-metalized wood particles in the core layer[J].Journal OF WOOD SCIENCE,1990,36(07):531-537. |
| [2] | Nagasawa C;Kumagai Y;Urabe K .Electro-conductivity and electromagnetic shielding effectiveness of nickel-plat-ed veneer[J].Journal OF WOOD SCIENCE,1991,37(02):158-163. |
| [3] | 黄金田,赵广杰.化学镀镍单板的导电性和电磁屏蔽效能[J].林产工业,2006(01):14-17. |
| [4] | Lili Sun;Jian Li;Lijuan Wang .Electromagnetic interference shielding material from electroless copper plating on birch veneer[J].Wood science and technology,2012(6):1061-1071. |
| [5] | Y. Liu;Q. Zhao .Study of electroless Ni-Cu-P coatings and their anti-corrosion properties[J].Applied Surface Science: A Journal Devoted to the Properties of Interfaces in Relation to the Synthesis and Behaviour of Materials,2004(1/4):57-62. |
| [6] | S.Armyanov;J.Georgieva .Electroless Deposition of Ni-Cu-P Alloys in Acidic Solutions[J].Electrochemical and solid-state letters,1999(7):323-325. |
| [7] | Ashassi-Sorkhabi H.;Dolati H.;Parvini-Ahmadi N.;Manzoori J. .Electroless deposition of Ni-Cu-P alloy and study of the influences of some parameters on the properties of deposits[J].Applied Surface Science: A Journal Devoted to the Properties of Interfaces in Relation to the Synthesis and Behaviour of Materials,2002(3/4):155-160. |
| [8] | Yu H S;Luo S F;Wang Y R .A comparative study on the crystallization behavior of electroless Ni-P and Ni-Cu-P deposits[J].Surface and Coatings Technology,2001,148(02):143-148. |
| [9] | Hui B;Li J;Wang L J .Preparation of EMI shielding and corrosion-resistant composite based on electroless Ni-Cu-P coated wood[J].BioResources,2013,8(04):6097-6110. |
| [10] | 薛亚军.Ni-Cu-P镀层和316L不锈钢在热盐酸溶液中的耐蚀性及机制[J].金属热处理,2013(06):114-117. |
| [11] | Zhu, L.;Luo, L.;Luo, J.;Wu, Y.;Li, J. .Effect of electroless plating Ni-Cu-P layer on brazability of cemented carbide to steel[J].Surface & Coatings Technology,2012(8/9):2521-2524. |
| [12] | Lee C K.Electroless Ni-Cu-P/nano-graphite composite coatings for bipolar plates of proton exchange membrane fuel cells[J].Journal of Power Sources,2012:220,130-137. |
| [13] | R. M. Abdel Hameed;A. M. Fekry .Electrochemical impedance studies of modified Ni-P and Ni-Cu-P deposits in alkaline medium[J].Electrochimica Acta,2010(20):5922-5929. |
| [14] | Guo, RH;Jiang, SQ;Yuen, CWM;Ng, MCF .Effect of copper content on the properties of Ni-Cu-P plated polyester fabric[J].Journal of Applied Electrochemistry,2009(6):907-912. |
| [15] | Zhang ZY.;Boyd IW.;Esrom H. .DECOMPOSITION MECHANISMS OF THIN PALLADIUM ACETATE FILM WITH EXCIMER UV RADIATION[J].Applied Surface Science: A Journal Devoted to the Properties of Interfaces in Relation to the Synthesis and Behaviour of Materials,1996(0):399-404. |
| [16] | Acharjee, T.C.;Coronella, C.J.;Vasquez, V.R. .Effect of thermal pretreatment on equilibrium moisture content of lignocellulosic biomass[J].Bioresource Technology: Biomass, Bioenergy, Biowastes, Conversion Technologies, Biotransformations, Production Technologies,2011(7):4849-4854. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%