Nghiên cứu tổng hợp polyme nhạy nhiệt Poly (N-vinyl caprolactam) và dẫn xuất acrylate=A study on the preparation of the thermally responsive Poly (N-vinyl caprolactam) and acrylate derivative

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Tác giả: Hồng Hà Cao, Trung Hải Huỳnh, Anh Tuấn Phùng

Ngôn ngữ: vie

Ký hiệu phân loại:

Thông tin xuất bản: Tạp chí Công thương, 2024

Mô tả vật lý: tr.362-367

Bộ sưu tập: Báo, Tạp chí

ID: 244271

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Poly (N-vinyl caprolactam) (PNVCL) is a thermally responsive polymer that many scientists are interested in researching. It is very difficult to control the polymerization of PNVCL. The study presented the photo-polymerization of N-vinyl caprolactam and acrylate derivative monomers with the use of phenylbis(2,4,6-tri-methylbenzoyl) phosphine oxide as a photo-initiator and UV halogen lamps with a wavelength of λ = 350 - 450 nm. The study analyzed the impacts of photo-initiator concentration, reaction time, and monomer concentration on the conversion efficiency of photo-polymerization. The prepared polymer’s structure and thermal sensitivity were determined by infrared spectroscopy (FTIR) and UV-vis spectroscopy. The results indicated that under the reaction time of 30 minutes, the photoinitiator concentration of 2.2%, and the monomer concentration of 3.5 grams, the conversion of photo-polymerization is 90%. The obtained polymer has a thermal sensitivity within the range of 32 to 40°C, which is close to human body temperature, thus having potential biomedical applications.Poly (N-vinylcaprolactam) (PNVCL) là một polime nhạy nhiệt, được rất nhiều nhà khoa học quan tâm nghiên cứu. Quá trình trùng hợp của PNVCL rất khó kiểm soát. Bài báo nghiên cứu tổng hợp copolime của N-vinyl caprolactam và dẫn xuất acrylate bằng phản ứng trùng hợp quang, sử dụng chất khơi mào quang là Phenylbis (2,4,6-tri-methylbenzoyl) phosphine oxide và nguồn sáng uv halogen huỳnh quang bước sóng λ = 350 - 450 nm. Các yếu tố ảnh hưởng đến độ chuyển hóa polime được khảo sát là nồng độ chất khơi mào quang, thời gian phản ứng và nồng độ monome tham gia phản ứng. Cấu trúc và khả năng nhạy nhiệt của copolime tạo thành được xác định bằng phương pháp chụp phổ hồng ngoại (FTIR) và phổ UV-vis. Kết quả nghiên cứu cho thấy, thời gian chiếu sáng 30 phút, nồng độ chất khơi mào 2,2% và khối lượng monome 3,5 g thì độ chuyển hóa polime đạt 90%. Hơn nữa, polime tạo thành cho thấy nhạy nhiệt trong khoảng từ 32 - 40°C, gần với nhiệt độ cơ thể người nên có tiềm năng ứng dụng trong lĩnh vực y sinh.

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