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首页> 外文期刊>Arabian Journal for Science and Engineering >Carbonized Charcoal‐Loaded PVDF Polymer Composite: A Promising EMI Shielding Material
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Carbonized Charcoal‐Loaded PVDF Polymer Composite: A Promising EMI Shielding Material

机译：碳化木炭负载的PVDF聚合物复合材料：一种有前途的EMI屏蔽材料

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摘要

Microcomposites of charcoal‐loaded polyvinylidene fluoride (PVDF) polymer have been prepared by solution mixing andhot compression method for electromagnetic interference (EMI) shielding applications. Electrical conductivity, dielectricproperties and EMI shielding efficiency of these composites have been studied in the X-band (8.2–12.4 GHz) frequencyregion. An increase in the conductivity from ~ 1.47 × 10~(−14) S/cm for pure PVDF to 23.2 S/cm for 80 wt.% charcoal‐loadedPVDF composite is obtained with improved mechanical strength. High effective dielectric constant (∈′) value of 116.06 anddielectric loss (∈″) of 233.59 are obtained at a frequency of 8.2 GHz. A high value of total shielding (SE_T), shielding dueto absorption (SE_A) and shielding due to reflection (SE_R) are measured to be 70.1 dB, 59.3 dB and 9.2 dB, respectively, for80 wt.% charcoal‐incorporated PVDF polymer composite, respectively. Dispersion studies suggest that SE_Tof the charcoalloadedPVDF polymer composite is independent of frequency and is mainly absorption dominant which makes it a suitablematerial for EMI shielding applications.
机译：通过溶液混合和热压法制备了木炭负载的聚偏二氟乙烯（PVDF）聚合物的微复合材料，用于电磁干扰（EMI）屏蔽应用。这些复合材料的电导率，介电性能和EMI屏蔽效率已在X波段（8.2-12.4 GHz）频率范围内进行了研究。可以提高机械强度，从而将电导率从纯PVDF的〜1.47×10〜（−14）S / cm提高到80％的木炭负载的PVDF复合材料的23.2 S / cm。在8.2 GHz的频率下可获得116.06的高有效介电常数（ε'）值和233.59的介电损耗（ε''）。对于80％重量百分比的木炭掺入的PVDF聚合物复合材料，总屏蔽（SE_T），吸收吸收屏蔽（SE_A）和反射反射屏蔽（SE_R）的高值分别为70.1 dB，59.3 dB和9.2 dB，分别。色散研究表明，木炭负载的PVDF聚合物复合材料的SE_T与频率无关，并且主要是吸收占优势的，这使其成为EMI屏蔽应用的合适材料。

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