Preparation And Applications Of Poly（Pentafluorophenyl Acrylate）-Based Functionalized Materials

Poly（pentafluorophenol acrylate）（p PFPA）has excellent solubility and resistance to hydrolysis,which can in situ react with primary amines and secondary amines containing functional groups with high efficiency at room temperature,and is often used to prepare functional materials.Based on these features,p PFPA serves as a versatile post-modifiable material and has found intensive applications in the areas of surface modification,chemical crosslinking and photo-patterning.In order to enrich the functionalized polymer materials prepared by p PFPA aminolysis reaction,the hydrophilic surface is prepared by in-situ ammonolysis in this paper,which overcame the disadvantages of traditional methods such as harsh preparation conditions,limited thickness of hydrophilic layer,pre-modified substrate and non-regeneration.At the same time,the dielectric materials with high dielectric constant,good process compatibility and low price are prepared and used in the research of the lateral field effect transistor sensor whose detection sensitivity of amine substance is increased by two orders of magnitude.Specific work contents are as follows:Firstly,a method to construct hydrophilic surface based on p PFPA in situ aminolysis is proposed,which enables high degree of freedom of structure design and rich selectivity of hydrophilic molecules.Compared with the traditional hydrophilic surface preparation methods,in situ aminolysis is simple,efficient and less dependent on the substrate.Immersing p PFPA coated substrates into 3-（（3-aminopropyl）dimethylammonio）propane-1-sulfonate（ADPS）,β-alanine and amine-terminal poly（ethylene glycol）（NH₂-PEG）solutions for 2 hours,the water contact angle on the surface of the substrates can be significantly reduced.In addition,the systematic studies show that the coatings have excellent anti-fogging,self-cleaning and anti-algae adhesion abilities.It is worth noting that the hydrophilic surface prepared by this method,relying on the rapid and quantifiable properties of in-situ aminolysis of p PFPA,can recover its hydrophilic components after physical damage only by simple soaking treatment.This work provides a simple and versatile hydrophilic surface construction method,which has important theoretical and practical value in the fields of self-cleaning,patterning,sensing,anti-fogging,anti-fouling and so on.Secondly,p PFPA is mixed with branched-poly（ethylene imine）（b PEI）to form a crosslinking network.The material is corrosion-resistant and the dielectric constant is high enough,which can be applied to the preparation of Organic field-effect Transistors（OFETs）.The morphology of the device is observed by X-ray photoelectron spectroscopy（XPS）and fluorescence microscopy.Semiconductor characterization tester is used to analyze the electrical and sensing performance of the transistor.The results show that 435 ppb of isopropylamine gas can cause a significant change in the source drain current of the device.The high sensitivity of the device is mainly attributed to the exposure of the OFETs conductive channel.Compared with previous research,this method simplifies the process and saves the cost.Lateral OFETs have outstanding performance in monitoring environmental ammonia content,which has important guiding value for the design and preparation of OFETs gas sensor.