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Vi hạt vi cầu carbonyl sắt có lớp silica phủ và tính chất magnetorheological kháng axit
Tóm tắt
Chúng tôi đã tổng hợp hạt carbonyl sắt (CI) từ tính được phủ silica thông qua phương pháp Stöber đã được cải tiến, trong đó các hạt CI được xử lý trước bằng một tác nhân gắn kết để tăng cường khả năng kết dính của tiền chất silica. Các hạt vi cầu từ tính được tổng hợp đã được đặc trưng hóa bằng kính hiển vi điện tử quét, phổ phát xạ tia X năng lượng tán xạ, và thử nghiệm chống axit trong dung dịch HCl. Hạt CI phủ silica không chỉ cho thấy khả năng ướt tốt hơn với dầu silicone kèm theo độ nhớt cắt tắt thấp hơn, làm cho nó trở thành một chất lỏng magnetorheological tốt hơn dưới trường điện từ mà còn có tính chất kháng axit được cải thiện.
Từ khóa
#hạt vi cầu carbonyl sắt #silica phủ #magnetorheology #đặc trưng hóa #kháng axitTài liệu tham khảo
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