采用机械共混法,在天然橡胶(NR)、环氧化天然橡胶(ENR)及其1∶1的共混物(NR/ENR)中添加超导电炭黑(SCCB),制备电磁屏蔽橡胶复合材料,研究了 SCCB 含量和基体极性差异对复合材料结构和电磁性能的影响.结果表明,随着 SCCB 含量增加,复合材料导电率(σ)和电磁屏蔽效能(EMI SE)逐渐增大,σ和 EMI SE 变化符合基于填料浓度的“逾渗”行为,并呈现以吸收为主导的电磁屏蔽机制；由于 NR 与ENR 极性差异诱导的 SCCB 选择性分布,SCCB/NR/ENR 复合材料具有最优的电磁性能,即最低的逾渗值(2．11％(体积分数))和最高的 EMI SE(5．33 dB).此外,还讨论了电磁性能与 SCCB 联通性之间的关系.
Super-conductive carbon black (SCCB)was incorporated into natural rubber (NR),epoxidized natural rubber (ENR)and their bend (NR/ENR)to fabricate electromagnetic interference shielding composites via tow-roll mixing.The influences of SCCB contents and matrices nature on the microstructures and electromag-netic properties were systematically investigated.As the results shown,the conductivity and electromagnetic in-terference shielding effectiveness (EMI SE)of all composites gradually increased with the increasing of SCCB contents,presenting obvious percolation behavior and absorption-dominated shielding mechanism.Due to the polarity difference-induced preferential localization of SCCB in NR/ENR blend,the SCCB/NR/ENR showed the greatest improvements in electromagnetic properties,i.e.lowest percolation threshold of 2.1 1vol% (4.0wt%), highest EMI SE of 5.33 dB.Also,the relation between electromagnetic properties and SCCB connectivity was discussed.
参考文献
| [1] | Liu X .New developments in electromagnetic materials[J].Electronics Process Technology,2007,28(3):160-162. |
| [2] | S Vinayasree;MA Soloman;Vijutha Sunny;P Mohanan;Philip Kurian;MR Anantharaman .A microwave absorber based on strontium ferrite-carbon black-nitrile rubber for S and X-band applications[J].Composites science and technology,2013(Jun.):69-75. |
| [3] | 曾敏,冯猛,张羊换,王新林.电磁屏蔽橡胶用填料的研究现状[J].合成橡胶工业,2008(03):237-241. |
| [4] | Lei H;Zhai G;Gong W .Effectsof conductivefillers on the properties of electromagnetic shielding rubber[J].Special Purpose Rubber Products,2008,29(2):30-33. |
| [5] | 陈晓燕,董发勤,杨玉山,郑凯.炭黑/碳纤维/ABS电磁屏蔽复合材料的制备及其性能研究[J].功能材料,2010(04):570-573. |
| [6] | D.D.L.Chung .Electromagnetic interference shielding effectiveness of carbon materials[J].Carbon: An International Journal Sponsored by the American Carbon Society,2001(2):279-285. |
| [7] | Hai-Ping Xu;Zhi-Min Dang;Dong-Hai Shi .Remarkable selective localization of modified nanoscaled carbon black and positive temperature coefficient effect in binary-polymer matrix composites[J].Journal of Materials Chemistry: An Interdisciplinary Journal dealing with Synthesis, Structures, Properties and Applications of Materials, Particulary Those Associated with Advanced Technology,2008(23):2685-2690. |
| [8] | Yan D X;Pang H;Li B et al.Structured reduced gra-phene oxide/polymer composites for ultra-efficient elec-tromagnetic interference shielding[J].Adv Funct Ma-ter,2015,25(4):559-566. |
| [9] | Cao, Q;Song, YH;Tan, YQ;Zheng, Q .Thermal-induced percolation in high-density polyethylene/carbon black composites[J].Polymer: The International Journal for the Science and Technology of Polymers,2009(26):6350-6356. |
| [10] | Mohammad Arjmand;Thomas Apperley;Michal Okoniewski .Comparative study of electromagnetic interference shielding properties of injection molded versus compression molded multi-walled carbon nanotube/polystyrene composites[J].Carbon: An International Journal Sponsored by the American Carbon Society,2012(14):5126-5134. |
| [11] | Feng M;Zeng M;Zhang J.EIectromagnetic shiel-ding properties of carbon black filled styrene-butadiene rubber/natural rubber composites[J].Safty & EMC,2010(3):39-42. |
| [12] | Wu, GZ;Li, BP;Jiang, JD .Carbon black self-networking induced co-continuity of immiscible polymer blends[J].Polymer: The International Journal for the Science and Technology of Polymers,2010(9):2077-2083. |
| [13] | Levon K;Margolina A;Patashinsky A Z .Multiple per-colation in conducting polymer blends[J].Macromole-cules,1993,26(15):4061-4063. |
| [14] | Pengfei Zhao;Yongyue Luo;Junlong Yang;Dongning He;Lingxue Kong;Peng Zheng;Qi Yang .Electrically conductive graphene-filled polymer composites with well organized three-dimensional microstructure[J].Materials Letters,2014(Apr.15):74-77. |
| [15] | 刘顺华;刘军民;董星龙.电磁波屏蔽及吸波材料[M].北京:化学工业出版社,2014:49-120. |
| [16] | Mao-Sheng Cao;Wei-Li Song;Zhi-Ling Hon .The effects of temperature and frequency on the dielectric properties, electromagnetic interference shielding and microwave-absorption of short carbon fiber/silica composites[J].Carbon: An International Journal Sponsored by the American Carbon Society,2010(3):788-796. |
| [17] | Sheng-Tsung Hsiao;Chen-Chi M. Ma;Hsi-Wen Tien.Using a non-covalent modification to prepare a high electromagnetic interference shielding performance graphene nanosheet/water-borne polyurethane composite[J].Carbon: An International Journal Sponsored by the American Carbon Society,2013:57-66. |
| [18] | Jinhong Du;Long Zhao;You Zeng .Comparison of electrical properties between multi-walled carbon nanotube and graphene nanosheet/high density polyethylene composites with a segregated network structure[J].Carbon: An International Journal Sponsored by the American Carbon Society,2011(4):1094-1100. |
| [19] | Xu J;Wong M;Wong C.Super high dielectric constant carbon black-filled polymer composites as integral capac-itor dielectrics[A].USA:IEEE,2004:536-541. |
| [20] | Andrei A. Gusev;Olga A. Guseva .Voltage breakdown in random composites[J].Advanced Engineering Materials,2003(10):713-715. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%