Preparation of Polyethyleneimine Modified Ti3C2Tx MXene Cross-linking Acrylic Acid-Hydroyethyl Methylacrylate Copolymer Films and Its Electromagnetic Shielding and Antistatic Properties
With the development of network communication and the increase of useful frequency of electronic equipment,the problems of electromagnetic radiation and pollution are becoming more and more serious,so it is urgent to research materials with high electromagnetic shielding performances.To solve this problem,the two-dimensional lamellar material Ti3C2Tx MXene with high electromagnetic shielding properties was used as the study material,polythylenimide containing a large number of amino groups was used as the modifier.Based on the hydrogen-bond interactions between Ti3C2Tx MXene and polyethylenimide,the modified Ti3C2Tx MXene was prepared by grafting polyethylenimide on the surfaces of Ti3C2Tx MXene.Acrylate-hydroxyethyl methacrylate copolymers were prepared by the addition reaction between acrylic acid and hydroxyethyl methacrylate.Modified Ti3C2Tx MXene was used as the cross-linking agent,and acrylic acid-hydroxyethyl methylacrylate copolymer was used as the polymer matrix,the polyethyleneimine modified Ti3C2Tx MXene cross-linking acrylic acid-hydroyethyl methylacrylate copolymer film was prepared through the solution blending and casting film methods.The structures of the prepared polythylenimide grafted Ti3C2Tx MXene cross-linking acrylate-hydroxyethyl methacrylate copolymer film was analyzed by transmission electron microscopy,energy spectrum analysis,X-ray diffraction analysis,Raman spectrum analysis and infrared spectrum analysis.The thermal stability,electromagnetic shielding properties,mechanical properties and antistatic properties of the composite films were further analyzed.Test results demonstrate that the prepared film exhibits high electromagnetic shielding efficiency of 45 dB,high tensile strength of 12 MPa and high surface resistance of 5×107 Ω,which were higher than those of polyethyleneimine cross-linking acrylic acid-hydroyethyl methylacrylate film without Ti3C2Tx MXene.
Two-dimensional Lamellar Material MXenePolyethyleneimineAcrylic Acid-Hydroyethyl Methylacrylate CopolymerElectromagnetic Shielding PropertyAntistatic Property
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