Nghiên cứu cấu trúc của màng điện cực polymer sử dụng cho pin nhiên liệu bằng phương pháp tán xạ tia X góc nhỏ và siêu nhỏ

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Tác giả: Duy Tập Trần

Ngôn ngữ: vie

Ký hiệu phân loại: 570.2825 Miscellany

Thông tin xuất bản: Khoa học công nghệ Việt Nam, 2018

Mô tả vật lý: 45515

Bộ sưu tập: Metadata

ID: 546825

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Chủ đề

Acid poly(styrene sulfonic) ghép mạch poly(ethylene-co-tetraluoroethylene) (ETFE-PEM) được tổng hợp bằng phương pháp ghép mạch khơi mào bởi chiếu xạ gamma, trong đó phim ban đầu original-ETFE được chiếu xạ và ghép mạch bởi monomer styrene (Grafted-ETFE), sau đó sulfo hoá để tạo thành màng dẫn proton. Cấu trúc lamellar của ETFE-PEMs được nghiên cứu như là hàm của mức độ ghép mạch (GD) bởi phương pháp tán xạ tia X góc nhỏ và siêu nhỏ. Kết quả cho thấy, vật liệu styrene chủ yếu đi vào pha vô định hình của cấu trúc lamellar và làm cho bề dày vùng này tăng, kéo theo chu kỳ lamellar tăng khi GD = 0-34%. Bề dày lamellar tinh thể, cấu trúc có liên quan đến độ bền cơ lý của màng, chỉ giảm nhẹ khi GD ≥ 34% Ngoài ra khi GD ≥ 34%, các styrene không đi vào cấu trúc lamellar nữa, mà chủ yếu đi vào khối cấu trúc lamellar (tập hợp các cấu trúc lamellar). Quá trình này dẫn đến chu kỳ lamellar không tăng thêm nữa, trong khi đó cấu trúc khối lamellar có sự phát triển mạnh mẽ khi GD ≥ 34%.Poly (styrene sulfonic) polyclic poly (ethylene-co-tetraluoroethylene) (ETFE-PEM) is synthesized by grafting initiated by gamma irradiation, in which the original-ETFE film is irradiated and grafted. by the styrene monomer (Grafted-ETFE), then sulfated to form a proton conduction film. The lamellar structure of ETFE-PEMs has been studied as a function of the degree of coupling (GD) by the small and micro angle X-ray scattering method. The results showed that the styrene material mainly enters the amorphous phase of the lamellar structure and causes the thickness of this region to increase, leading to an increase in lamellar cycle when GD = 0-34%. The lamellar crystalline thickness, the structure related to the mechanical strength of the membrane, only slightly decreases when GD ≥ 34%. Also when GD ≥ 34%, the styrene does not enter the lamellar structure anymore, but mainly enters lamellar structure blocks (collection of lamellar structures). This process leads to no further increase in lamellar cycle, while lamellar block structure has a strong development when GD ≥ 34%.

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