Electrospinning Preparation Of Microbial Pol Ymer Magnetic Curing Carrier

Polycaprolactone?PCL?is a synthetic high molecular polymer that is degradable and non-toxic.Widely used in the manufacture of cell scaffold materials,bone tissue engineering,catalysts,carriers and so on.Polyacrylonitrile?PAN?has anti-sun-resistance,can maintain 70%mechanical properties in the sun for 18 months,and has the ability to resist pollution.PAN is widely used in the apparel industry,sensors,carriers,linear actuators,and artificial muscles.In this paper,magnetic polycaprolactone nanofibers and magnetic PCL/PAN composite nanofibers were prepared by electrospinning technology,respectively.They were used in microbial carriers and were used in wastewater treatment.The magnetic properties of nanofiber membranes were beneficial to recovery and reuse.The surface of the nanofibers obtained with N,N-dimethylformamide?DMF?as a solvent is smooth,and the addition of a solvent with a low boiling point of trichloromethane?TCM?facilitates the porosity of the fiber surface,so the two solvents are mixed in this article.Polycaprolactone was used as a solute to form a solution,and an appropriate amount of triiron tetroxide nanoparticles was added to the solution.A magnetic polycaprolactone nanofiber membrane was prepared by electrospinning.This paper explores the effects of the feed rate,spinning voltage,and the ratio of DMF in the mixed solvent on the morphology and properties of the resulting nanofiber membranes.The morphology of the fiber was observed using an electron microscope.The crystallization inside the fiber was investigated by XRD,infrared and differential scanning calorimetry.The mechanical properties of nanofiber membranes were tested.Provides effective data analysis and optimum preparation conditions for the preparation of nanofibers with better performance in the future.The obtained magnetic polycaprolactone nanofibers were used to cultivate the carrier of the microorganism Bacillus subtilis.Since the surface of the nanofibers had grooves and holes,the attachment rate of the Bacillus subtilis was improved,and the experiment proved that the Bacillus subtilis in the polycaprolactone nanometer.The fiber membrane grows well and has a good effect on the treatment of sewage.In this paper,DMF and TCM are also used as solvents.PCL and PAN are used as solute and mixed in different ratios.Magnetic Fe₃O₄ nanoparticles are added to the solution and magnetic composite nanofiber membranes are prepared by electrospinning.Scanning electron microscopy was used to investigate the morphology of nanofiber membranes at different mixing ratios.It was found that the diameter distribution of nanofibers was uniform and there was no adhesion phenomenon.XRD,infrared test and differential scanning calorimetry tests were used to investigate the internal crystallization of the fiber.It was found that the addition of PAN changed the crystallization position.Through dynamic mechanical analysis,the mechanical properties of magnetic PCL/PAN nanofiber membranes have been reduced.The main purpose of adding PAN to nanofiber membranes in this paper is to strengthen the solar radiation resistance of nanofiber membranes so as to increase the probability of reuse in wastewater treatment.The main purpose of this paper is to use nanofiber membranes as a carrier for microorganisms and use microorganisms to treat sewage.Increasing water availability and using microorganisms in wastewater treatment are feasible methods.Can also expand the application of nanofiber membranes,such as seawater oil pollution and other aspects.