Vai trò của graphene trong việc tăng cường tính chất hóa học và cơ lí của nhựa nền styrene acrylic ứng dụng cho lĩnh vực sơn nước

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Tác giả: Đức Anh Đinh, Thế Duy Nguyễn, Trần Trúc Phương Nguyễn

Ngôn ngữ: vie

Ký hiệu phân loại:

Thông tin xuất bản: Tạp chí Khoa học và Công nghệ - Đại học Nguyễn Tất Thành, 2023

Mô tả vật lý: tr.46

Bộ sưu tập: Báo, Tạp chí

ID: 347440

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In this study, we focus on the development of Graphene and Styrene Acrylic (SA), commonly used in interior water-based paint products by stirring method. Graphene nanoflakes are produced by liquid phase exfoliation (LPE), which is a simple, efficient, and economical method for large-scale production of graphene. The results from Raman spectroscopy and SEM analysis show that Graphene has been synthesized with an average size of ~170 nm, has a multilayer structure, and does not appear to have defects. After that, Graphene is mixed directly into the polymer matrix via a simple solution blending process without the addition of other additives to form the SA-G composite. The Graphene nanoflakes were dispersed into the polymer matrix with a relatively low mass ratio (1.5 mg of Graphene in 1 g SA) to form a SA-graphene (G-SA) composite structure with impressive mechanical and chemical properties. In particular, the impact resistance and hardness of this composite coating increased 3 times with respect to that of pristine SA coating. Besides, the water and alkali resistance of the composite coating is more durable than that of pristine SA coating. Hence, the SA-G composite is considered as a promising material for the application of interior water-based paint products with high chemical and mechanical properties in the future.Nghiên cứu này chế tạo composite của graphene và chất tạo màng styrene acrylic (SA) được sử dụng phổ biến trong sơn nước nội thất, bằng phương pháp khuấy trộn trong dung dịch. Các mảnh graphene được tổng hợp bằng phương pháp bóc tách trong pha lỏng (LPE). Kết quả phân tích phổ Raman và kính hiển vi điện tử quét (SEM) cho thấy, graphene đã được tổng hợp với kích thước trung bình ~170 nm, có cấu trúc đa lớp và không xuất hiện sai hỏng bề mặt. Composite SA-graphene (SA-G) được tổng hợp thành công bằng phương pháp phối trộn dung dịch đơn giản mà không cần sử dụng thêm phụ gia trợ tương hợp. Các mảnh graphene được phân tán đều vào trong nhựa nền với tỉ lệ khối lượng tương đối thấp, chỉ 1,5 mg graphene trong 1 g SA, đã giúp cải thiện các tính chất cơ lí như độ bền va đập và độ cứng của màng composite lên gấp 3 lần. Bên cạnh đó, hiệu quả bảo vệ của màng composite trước các tác nhân thẩm thấu (nước và kiềm) cũng được tăng cường đáng kể. Hỗn hợp composite SA-G sẽ là vật liệu tiềm năng cho việc phát triển các sản phẩm sơn nước nội thất với tính chất cơ lí cao trong tương lai.

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