Preparation Of Imidazole-based Polymer Electrospun Nanofiber Films

The research of membrane materials has become the development trend in the world today.Electrospinning technique is widely used as a simple and rapid method for preparing fibers in micro or nano scale.In this thesis,a series of electrospun nanofibers membrane are prepared by using electrospinning technology and imidazole based polymer as the research object.The main content are as follows:1.The paper maily introduces the research significance and main preparation methods of membrane materials in world today,the typical method of preparing nanofiber film-electrospinning technique,and emphatically introduces the excellent performance and application direction of electrospinning technique.Then this part introduces the main research materials of--N-vinylimidazole,and summarizes its research status.Finally,the paper proposes the research idea,research aim and innovation point of the new film materials.2.The synthesis of imidazole based copolymers and the preparation of GO(RGO)/copolymer electrospun nanofiber films are introduced,and the composite film is characterized by Fourier transform infrared spectroscopy,thermogravimetric analysis,scanning electron microscopy,transmission electron microscopy and Raman spectroscopy,and its electromagnetic shielding performance was studied by Vector Network Analyzer.The results show that we successfully prepared electrospun nanofiber film containing GO(RGO),and the electromagnetic shielding efficiency of the RGO composite film increases with the content of RGO,which up to about 25 dB at 6.9~7.4 GHz and 7.4~9.3 GHz and 11.0~11.7 GHz frequencies.3.The preparation of 2-phenylazoimidazole/polymer series electrospun nanofiber films are introduced.The composite films are characterized by the Fourier transform infrared spectroscopy,thermogravimetric analysis,scanning electron microscopy,viscosity and modulus of the electrospun precursor solution are characterized by using rheometer.Finally,with the change of surface wettability and contact angle as variable,the "reactive contact angle change method" is designed todetect ions in the naked eye,and the applicability of the method to the naked eye detection of transition metal ions and bio-inorganic molecules is verified by the 4kinds of composite films prepared by us.In this paper,a series of new functional films have been designed and fabricated,and the field of electromagnetic shielding is explored in doping RGO.Adding optical response groups to diversify the composite membranes so that they are applied in the field of ion-hole recognition,this new method,expands the new direction for the research of film materials.