NGHIÊN CỨU SỬ DỤNG ỐNG NANO CACBON ĐA TƯỜNG HƯỚNG TỚI CẢI THIỆN NĂNG LƯỢNG TRUYỀN NHIỆT = RESEARCH TO USE MULTI-WALLED CARBON NANOTUBES TO IMPROVE HEAT TRANSFER ENERGY

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Tác giả: Ngọc Linh Đỗ, Hữu Đạt Nguyễn, Thị Hương Nguyễn, Tuấn Anh Nguyễn, Minh Phúc Tạ, Thị Hương Trần

Ngôn ngữ: vie

Ký hiệu phân loại:

Thông tin xuất bản: Tạp chí Khoa học & Công nghệ - Đại học Công nghiệp Hà Nội, 2020

Mô tả vật lý:

Bộ sưu tập: NCBI

ID: 473736

Thêm vào giỏ

Multi-walled carbon nanotubes (MWCNTs) are a type of material that has a lot of structural features as well as outstanding properties that no material is available. These include higher conductivity, better thermal conductivity, higher mechanical strength than conventional materials, so MWCNTs have been used in many fields that have been applied in practice, in particular. is in the field of heat transfer. The MWCNTs used are a very good heat sink because they are capable of absorbing the heat generated by the engine or CPU. However, with the structure of coaxial interlocking graphene tubes making the MWCNTs material quite chemically inert, the immediate use of the material actually makes it difficult. Therefore, it is necessary to denaturation of MWCNTs, use strong acids such as a mixture of H2SO4/HNO3 or a strong KOH base to bind functional groups to the surface of MWCNTs. Then, the activity of the material will be higher and easy to use in practical applications, thereby creating heat dissipation fluid containing multi-walled carbon nanotubes. Ống nano cacbon đa tường (MWCNTs) là một loại vật liệu có rất nhiều đặc điểm về cấu trúc cũng như tính chất nổi bật mà không một vật liệu có được. Có thể kể đến như độ dẫn điện, độ dẫn nhiệt tốt hơn, độ bền cơ cao hơn so với các vật liệu thông thường, vì vậy MWCNTs đã được ứng dụng trong rất nhiều lĩnh vực đã được áp dụng trong thực tế, đặc biệt là trong lĩnh vực truyền nhiệt. MWCNTs được sử dụng là một chất tản nhiệt rất tốt vì nó có khả năng hấp thụ nhiệt lượng do động cơ hay CPU tỏa ra. Tuy nhiên, với cấu trúc các ống graphene lồng vào nhau đồng trục đã làm cho vật liệu MWCNTs khá trơ về mặt hóa học nên việc sử dụng ngay vật liệu vào trong thực tế gây khó khăn. Vì vậy, cần phải biến tính MWCNTs, sử dụng axit mạnh như hỗn hợp H2SO4/HNO3 hay bazo mạnh KOH để gắn nhóm chức lên bề mặt của MWCNTs. Khi đó, độ hoạt động của vật liệu sẽ cao hơn và dễ dàng sử dụng trong các ứng dụng thực tiễn, từ đó chế tạo ra chất lỏng tản nhiệt có chứa mặt ống nano cacbon đa tường.

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