Study On The Photodegradable Film Based On The Acid-Soluble Polymer Material

In recent years,the discarded electronic products are increasing day by day,because they can not degrade by themselves,so they have caused serious pollution to the environment.This problem can be solved by using transient technology,the materials using transient technology can run stably without triggering and degrade after triggering.In this thesis,the optical radiation transient film is designed.Electrodes can be deposited on the film to form electronic devices,which can degrade themselves under ultraviolet light.The main research contents of this thesis are listed as follows:(1)The optical radiation transient system model is constructed.In this thesis,the optical radiation transient system is firstly constructed,including the transient electronic device and the triggering device.The transient electronic device is composed of the transient film and the transient metal,both of which degrade together under the trigger of the light source.Then the theory of electron transport in the film transient process is studied.(2)Preparation and study of transient film.In this thesis,the preparation and characterization of polymer substrate material Cyclic polyphthalaldehyde(CPPA),Then compared CPPA processing technology into film,determined to use the negative pressure constant temperature process,through the experiment to determine the best process parameters of 40 KPa、30℃、8 h.Then the characteristics of the film wasstudied,and it was determined that the film should be stored in a dark vacuum environment for 15～18 days.And it was proved that room temperature had no effect on the structure of the film.(3)Study on the influencing factors of film transient process and degradation time.The most important characteristic of the film is the transient characteristic,which is based on the depolymerization of CPPA into its monomer o-Phthalaldehyde(o-PA).In this thesis,the transient process of the film was explored,and the transient residual was characterized by NMR,and the results showed that the residual substances were o-PA,o-carboxylbenzaldehyde and trace CPPA.Then the factors affecting the degradation time of the film were explored,and the parameters of the film were determined as 6%content MBTT,70μm thickness and 1 cm~2 area.The UV LED wavelength of 368 nm was determined by characterizing the UV absorption spectrum of the photoacid producer.And compared the illumination adjustment mode,by adjusting the LED input voltage tochange the illumination to achieve the control of film degradation time.change the illumination to achieve the control of film degradation time.(4)Properties characterization and application of the film.The dynamic mechanical analysis(DMA)of the film was analyzed.The results show that the energy storage modulus of the film decreases with the increase of ultraviolet illumination,and the transient process requires continuous UV radiation.Then the transient process of the film was quantified to verify the correctness of the qualitative judgment.Finally,the surface roughness of the film was characterized,and the magnesium electrode was deposited on the flat film.The resistance of the electrode under UV radiation was tested,which proved the effectiveness of the film.Through the above research,this thesis finally developed an excellent optical radiation transient film,whose degradation time is controllable,to solve the problems caused by electronic waste.