Font Size: a A A

Design Of High-Voltage Electrospinning Machine And Optimizing Of Electrostatic Field

Posted on:2009-03-01Degree:DoctorType:Dissertation
Country:ChinaCandidate:H W DuanFull Text:PDF
GTID:1101360275466138Subject:Mechanical design and theory
Abstract/Summary:PDF Full Text Request
Electrostatic spinning is the most important method to get nano-meter at present.The process of electrostatic spinning is:first,macromolecular solution or melt with charge flows and is deformed in strong electrostatic field,then cooling and solidify after vaporizing solvent or melt,at last fibrous material is got.There is a few research on controlling high voltage electrostatic spinning machine,after consulting abundant documents both at home and abroad. Electrostatic equipment is on experiment,and very simple,assembled by laboratory assistant; there is no finite element analysis and optimize on high voltage electrostatic spinning.So it is neceesary to develop controlling high voltage electrostatic spinning machine and research on finite element analysis and optimize working electric feild.This paper is composed with three parts:finite element analysis and optimization of electric field high voltage electrostatic spinning working,design high voltage electrostatic spinning machine and experiments on it.In analysis and optimize:first,according to working theory and process,factors affects distribution of working electrostatic field in spinning process are analysed and unimportant of which are neglected.Simulation model of working of electrostatic spinning field was established by ANSYS,and which is predigested,according to structural characteristic of high voltage electrostatic spinning machine.Then a better method was chosen by comparing different distribution of electric field,after that optimization was carried on using auxiliary electric field.At last several parameters affecting distribution of spinning electric field was carried on analysis and optimization by ANSYS.In design,a electrostatic spinning machine in high voltage was designed,whose experimental parameters can be controlled,in the rule of real-time regulation of experimental parameters,such as controlling feeding speed of injection equipment,controlling reception distance,controlling rotating speed of receiver roller,controlling reciprocating motion speed of receiver platform,in distance controlling and reciprocating motion speed controlling,stepmotor and worm are used to move and control;in rotating speed controlling,a receiver roller with changing radius was designed,and servomotor was used to rotate and control.Visual C++6.0 was used to develop controlling procedure of electrostatic spinning machine.Different parameters can be input in from controlling interface,in order to adjust and control experimental parameters on time.Electromagnetism shielding equipment was design to protect controlling parts,so that they can steadily work in high voltage electrostatic field.In the high-voltage electro-spinning machines experimental research,using self-designed electro-spinning machine spinning device in the process of spinning,according to the criteria of evaluation of electric field stability,spinning the collection as well as the spinning form,and choosing the optimize the electric field device,the experimental study of single-factor has been completed on different voltage,different reception from the different spinning speed,then obtained the relationship between different influencing factors and Spinning collected form.
Keywords/Search Tags:Electrostatic spinning, Optimization, Electric field analysis, ANSYS
PDF Full Text Request
Related items