Microwave absorption properties of neoprene-based rubber with magnetic fillers and their effect on ozone degradation

Yıl 2026, Cilt: 15 Sayı: 2, 242 - 246, 29.01.2026

Engin Acıkalın

Öz

The increasing demand for effective electromagnetic interference (EMI) shielding materials has led to the development of polymer-based composites with tailored microwave absorption properties. In this study, neoprene-based rubber composites were fabricated using various magnetic and dielectric fillers, including carbonyl iron powder (CIP), ferrites, and zinc oxide. The microwave absorption behavior of the samples was evaluated using a vector network analyzer in the 8.2–12.4 GHz frequency range, while ozone-induced degradation was assessed through FTIR spectroscopy and tensile testing. The results revealed that increasing CIP content significantly enhanced the dielectric permittivity and microwave attenuation, with the highest absorption observed in samples containing 66% CIP. Ferrite fillers contributed to improved ozone resistance by stabilizing the rubber matrix during oxidative exposure. Hybrid systems combining CIP and ferrites demonstrated synergistic effects, achieving both high electromagnetic performance and mechanical durability. This dual-functional approach offers promising potential for applications in automotive, aerospace, and electronic systems where EMI shielding and environmental resilience are critical. The study highlights the importance of filler selection and composition optimization in designing advanced rubber composites for multifunctional performance.

Anahtar Kelimeler

Microwave absorption , neoprene rubber , carbonyl iron , ferrite , ozone resistance.

Destekleyen Kurum

The author would like to explicit their gratefulness to Kerim ÇOBAN and TUBITAK Marmara Research Centre and Arsan Kauçuk Co. for their collaboration in these studies. This research was presented at the 2nd International Symposium on Characterization, which took place in Turkey in September 2022.

Neopren bazlı kauçuğun mikrodalga soğurma özellikleri ile manyetik dolgu maddeleri ve bunların ozon bozunmasına etkisi

Öz

Yüksek frekanslarda elektromanyetik enerji yayan elektronik cihazların ve radyo frekansı radyasyon kaynaklarının hızla çoğalması, bunların operasyonel güvenilirliklerine ilişkin endişelerin artmasına neden olmuştur. Elektromanyetik (EM) dalga sızıntısı, bu tür cihazların yanlış çalışmasından veya yetersiz korumasından kaynaklanarak, diğer elektronik sistemlerle önemli parazitlere neden olabilir. Bu sorunu hafifletmek için araştırmacılar EM dalga emisyonlarını kontrol altına alabilecek etkili mikrodalga emiciler geliştirmeye odaklanmışlardır. Mikrodalga emici kompozitlerin tasarımında uygun bir polimer matris ve fonksiyonel dolgu maddesinin belirlenmesi çok önemlidir. Tipik olarak, bu tür kompozitler, yüksek dielektrik geçirgenliğe ve manyetik geçirgenliğe sahip dolgu maddeleri ile birleştirilmiş bir dielektrik polimer matrisinden oluşur. Matris, dolgu partiküllerini birbirinden izole ederek absorpsiyon verimliliğini optimize eder.
Bu çalışmada, hem manyetik hem de manyetik olmayan dolgu maddeleriyle doldurulmuş neopren kauçuk kompozitlerin mikrodalga soğurma özellikleri değerlendirilmiştir. Ayrıca, bu malzemelerin ozon kaynaklı bozulmaya karşı direnci araştırılmıştır.

Anahtar Kelimeler

Mikrodalga emilimi , neopren kauçuk , karbonil demir , ferrit

Kaynakça

• [1] Ren, J., Mu, Z., Sellami, R., El-Bahy, S. M., Liang, G., Guo, J., El-Bahy, Z. M., Xie, P., Guo, Z., Hou, H., Multifunctions of microwave-absorbing materials and their potential cross-disciplinary applications: A mini-review, Adv. Compos. Hybrid Mater., 8 (2025), Art. no. 202. DOI: 10.1007/s42114-025-01258-5
• [2] Yang, Q., Wu, R., Li, F., Liang, H., Zhang, H., Kong, X., Integrated design and performance of microwave absorbing-mechanical load bearing: metasurface aramid unidirectional cloth composites, Adv. Compos. Hybrid Mater., 8 (2025), Art. no. 250. DOI: 10.1007/s42114-025-01323-z
• [3] Pang, C. K., Joseph, C. G., Farm, Y. Y., Gansau, J. A., Teo, S. H., Yap, T. Y. H., Liew, R. K., Metal ferrites nanoparticles for catalytic and photocatalytic ozonation in wastewater treatment: a review, Environ. Chem. Lett., 21 (2023), pp. 2953–2993. DOI: 10.1007/s10311-023-01630-1
• [4] Liu, L., Yao, J., Li, H., Microwave absorption properties of one thin sheet employing carbonyl–iron powder and chlorinated polyethylene, J. Magn. Magn. Mater., 322 (2010), no. 11, pp. 1736–1740.
• [5] Feng, Y. B., Qu, B. H., Absorbing properties and structural design of microwave absorbers based on carbonyl iron and barium ferrite, J. Magn. Magn. Mater., 318 (2007), no. 1–2, pp. 8–13.
• [6] Das, N. C., Chaki, T. K., Chakraborty, D., Electromagnetic interference shielding effectiveness of conductive carbon black and carbon fiber-filled composites based on rubber and rubber blends, Adv. Polym. Technol., 20 (2001), no. 3, pp. 226–236.
• [7] Caffarena, V. R., Capitaneo, J. L., Ogasawara, T., Pinho, M. S., Microwave absorption properties of Co, Cu, Zn-substituted hexaferrite polychloroprene nanocomposites, Mater. Sci.-Poland, 26 (2008), no. 3, pp. 875–884.
• [8] Tanrattanakul, V., Bunchuay, A., Microwave absorbing rubber composites containing carbon black and aluminum powder, J. Appl. Polym. Sci., 105 (2007), no. 4, pp. 2036–2045.
• [9] Annadurai, P., Sethuraman, K., Murali, K., Studies on microwave shielding materials based on ferrite- and carbon black-filled EPDM, J. Appl. Polym. Sci., 83 (2002), no. 1, pp. 145–150.
• [10] Chung, D. D. L., Electromagnetic interference shielding effectiveness of carbon materials, Carbon, 39 (2001), no. 2, pp. 279–285.
• [11] Nikolay, D., Rubber based composites with active behavior to microwaves (Review), J. Univ. Chem. Technol. Metall., 44 (2009), no. 2.
• [12] Kruželák, J., Hudec, I., Ušáková, M., Dosoudil, R., Elastomeric materials with magnetic fillers—curing and properties, Rohstoffe und Anwendungen, KGK, Jan./Feb., Bratislava, Slovakia, 2011.
• [13] Peng, J., Zhang, Y., Fang, Z., Liu, G., Improving microwave absorption performance of carbonyl iron powder by regulating geometric dimensions and electromagnetic-dielectric synergism, Compos. Part B Eng., 250 (2025), Art. no. 1705.
• [14] Kruželák, J., Kvasničáková, A., Džuganová, M., Hašková, L., Dosoudil, R., Hudec, I., Curing, properties and EMI absorption shielding of rubber composites based on ferrites and carbon fibres, Polymers, 15 (2023), no. 4, Art. no. 857. DOI: 10.3390/polym15040857.