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首頁> 外文期刊>Smart Materials & Structures >Electromagnetic, magnetorheological and stability properties of polysiloxane elastomers based on silane-modified carbonyl iron particles with enhanced wettability
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Electromagnetic, magnetorheological and stability properties of polysiloxane elastomers based on silane-modified carbonyl iron particles with enhanced wettability

機(jī)譯：基于硅烷改性羰基鐵顆粒的聚硅氧烷彈性體的電磁，磁流變和穩(wěn)定性特性，增強(qiáng)潤濕性

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Soft carbonyl iron (CI) particles were successfully modified with a thin layer of tetraethoxysilane (TEOS) to enhance the wettability of their surface in hydrophobic media. The contact angle investigations and tensiometric analysis revealed and helped quantify the significantly enhanced wettability and, thus, the better interfacial adhesion of the TEOS-coated CI particles (CI-TEOS) with the non-polar siloxane-based materials. Therefore, stable magnetorheological elastomers (MREs) based on CI-TEOS particles and polydimethyl siloxane matrix were fabricated. The prepared composites had different particle loadings and microstructural characteristics: isotropic and anisotropic. These structural differences were confirmed by scanning electron microscopy and were found to considerably affect dielectric properties of the MREs due to various charge transport mechanisms within the particle clusters. Furthermore, the magnetorheological (MR) performances of isotropic MRE variants were analysed before and after exposure to acidic environment. After the corrosion test, the MRE based on bare CI particles exhibited dramatically decreased relative MR effect and mechanical properties when compared with its analogue containing CI-TEOS.
機(jī)譯：用薄的四乙氧基硅烷（TEOS）成功地改變軟羰基鐵（CI）顆粒，以增強(qiáng)其表面在疏水介質(zhì)中的潤濕性。接觸角調(diào)查和張力分析顯示并幫助量化了顯著增強(qiáng)的潤濕性，從而使TEOS涂覆的CI顆粒（CI-TEOS）與基于非極性硅氧烷的材料的更好的界面粘附性。因此，制造了基于CI-TEOS顆粒和聚二甲基硅氧烷基質(zhì)的穩(wěn)定的磁流變彈性體（MRE）。制備的復(fù)合材料具有不同的顆粒載體和微觀結(jié)構(gòu)特征：各向同性和各向異性。通過掃描電子顯微鏡確認(rèn)這些結(jié)構(gòu)差異，并且發(fā)現(xiàn)由于顆粒內(nèi)的各種電荷傳輸機(jī)制而顯著影響MRE的介電性質(zhì)。此外，在暴露于酸性環(huán)境之前和之后分析各向同性MRE變體的磁流變學(xué)（MR）性能。在腐蝕試驗(yàn)之后，與含有CI-TEOS的類似物相比，基于裸CI顆粒的MRE顯著降低了相對(duì)MR效應(yīng)和機(jī)械性能。

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