Dissertation > Excellent graduate degree dissertation topics show

Study on the Preparation and Application of Microcapsule by in-situ Polymerization

Author: WangKaiHui
Tutor: ZhouXiaoDong
School: East China University of Science and Technology
Course: Chemical Engineering
Keywords: microcapsule surface active agent damping magnetism
CLC: TB383.4
Type: Master's thesis
Year: 2012
Downloads: 21
Quote: 0
Read: Download Dissertation

Abstract


Urea-formaldehyde Microcapsules are widely researched in many fields due to their excellent sealing property, mechanical property, etc. A series of microcapsules were prepared by in situ polymerization with different concentration of surfactant EMA. After the effects of various result parameters were experimentally investigated, the mechanism of urea-formaldehyde microcapsules prepared by one-step process was studied. And then we prepared some microcapsules with special functional properties. The main contents are listed as follows:After a series of microcapsules were prepared in different concentration of the poly(ethylene-alt-maleic anhydride) (EMA), we made some research on the surface morphology, the shell thickness, the reaction mechanism etc, of the microcapsules. Results showed that the concentration of the EMA was important for the dispersibility of the microcapsules when they were dried, microcapsules with good dispersibility and special structure formed only if the concentration of poly(E-MA) kept below a special value. At the same time it was found that the concentration required for the best release property of the microcapsules wall was the same as critical micelle concentration (CMC) of EMA.Tetrachroloethylene (TCE) and ferroferric oxide which were prepared by ourselves were chosen as core materials, we prepared some microcapsules with absorb microwave property. The effect of the microcapsule particle content, diameter, were researched on the property of damping and microwave absorb. The results showed that the attenuation reflection peak of the composite materials increased nearly 100% in the magnetic field when the volume of microcapsule content was 20%, at the same time, the composite material loss factor reached 0.3. In the fixed frequency 1 Hz conditions, the smaller of microcapsule particle size,composite materials in the glass transition temperature of the peak value is higher.Depend on the different volatility of TCE and olive oil, we use that material make some microcapsules with special structure. The application prospect in water sound absorption was prospect after the damping properties were researched.

Related Dissertations

  1. Passivity-Based Control and Its Application to the Electromagnetic Levitation System,TP13
  2. Studies on the Preparation of 20% Chlorpyrifos CS and Its Analytic Methods,S482.3
  3. Closed thin-walled beams composite modal damping prediction,TB33
  4. Studies on High Performance Water-based Acrylate Damping Coating,TQ633
  5. Study on Properties of Compound Dynamic Damper,TB535.1
  6. Research on Dynamics Performance and Optimal Design for Constrained Damping Vibration Isolator,TB535.1
  7. Studies on Damping Modification of Fiber Reinforced Composites,TB332
  8. Experimental Analysis of Boom Vibration and Stress Calculation of Pipe for 46D Truck-mounted Concrete Pump,TU646
  9. Jasmine fragrance microcapsule Preparation and Application of cotton fabrics,TS195.6
  10. Shen pipe segment mooring ropes force state Study,U451
  11. Research on Attitude Determination and Magnetic Control for Small Satellites,V448.2
  12. Study on the Tire Road Noise Characteristics of Intermittent Graded Asphalt Mixture,U461.51
  13. Research and Realization of Return-to-center & Damping Control Strategy for Electric Power Steering System,U463.4
  14. Solar wing vibration motor drive control theory and simulation,V448.2
  15. Skid steer loader working device damping system design and research,TH243
  16. Materials and structures damping characteristics and application of measurement,O329
  17. Sustainable Use of Land Resource: A Posotive Study on the Yangtze River Delta,F127;F224
  18. Study on Stability of Anthocyanins from Purple Corn and Application of Yogurt,TS202.3
  19. The Study of Cast Iron Machine Bed Inner Cavity Sand Seal Structure Characteristics,TG519.1
  20. The Research of Dynamic and Static Characteristic of Resin Concrete Machine Bed,TG502.3

CLC: > Industrial Technology > General industrial technology > Materials science and engineering > Special structural materials
© 2012 www.DissertationTopic.Net  Mobile