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Chức năng hóa ống nano carbon nhiều lớp bằng glucose: nghiên cứu cấu trúc và chế tạo các composite poly(amide-imide) dựa trên dopamine
Tóm tắt
Quá trình chức năng hóa ống nano carbon nhiều lớp (MWCNTs) bằng glucose được thực hiện thông qua phản ứng este hóa. Phản ứng được tiến hành trong môi trường nước, có sự hiện diện của N,N′-carbonyldiimidazole như một chất xúc tác. MWCNTs chức năng hóa bằng glucose (MWCNTs-Gl) đã được đặc trưng thông qua một loạt các phương pháp bao gồm phổ hồng ngoại biến đổi Fourier, nhiễu xạ tia X, quét phát xạ trường và kính hiển vi điện tử truyền qua. Kết quả phân tích nhiệt trọng lượng (TGA) cũng đã chứng minh sự hiện diện của phần hữu cơ trong các MWCNTs chức năng hóa. Các màng composite MWCNT-Gl/poly(amide-imide) (PAI) với các hàm lượng MWCNTs-Gl khác nhau (5, 10 và 15 wt%) đã được chuẩn bị bằng phương pháp trộn dung dịch hỗ trợ siêu âm. Các quan sát kính hiển vi cho thấy sự phân tán của MWCNTs-Gl được cải thiện nhờ các nhóm hữu cơ trên bề mặt MWCNT và các nhóm chức năng trên PAI. Kết quả TGA cho thấy các màng lai có độ ổn định nhiệt tốt. Theo các thử nghiệm kéo căng cơ học, độ bền kéo và mô đun Young của các composite MWCNT-Gl/PAI tăng lên khi hàm lượng MWCNTs-Gl tăng.
Từ khóa
#ống nano carbon #glucose #chức năng hóa #composite #poly(amide-imide) #TGA #độ bền kéo #mô đun YoungTài liệu tham khảo
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