Dissertation > Excellent graduate degree dissertation topics show

The Research on the Formation and Application of Carbonaceous Mesophase

Author: LiangZhiYong
Tutor: LiuQiCheng;LiuPeng
School: Changsha University of Science and Technology
Course: Materials Science
Keywords: Carbon mesophase formation application Compression strength γ-resin
CLC: TQ127.1
Type: Master's thesis
Year: 2011
Downloads: 9
Quote: 0
Read: Download Dissertation

Abstract


The carbon mesophase was prepared by emulsion method and hot polycondensation method respectively. The influence of different temperature, holding time and content ofγ-resin on performance of carbon intermediate researched, and tested the resulted samples by polarization microscope, XRD, BET, etc. High-dense and high-strength carbon materials and active carbon was made using carbon mesophase as starting materials, and explored the process and properties, conclusion as follows:The content of mesophase asphalt increased with hot polycondensation reaction time extension and alkane heterolysis velocity acceleratev in a same given temperature. But on the other hand, the defects turned up in the melt mesophase due to the viscosity of asphalt system increased with the continuous creation of mesophase, which hinder the growth of single ball resulting in the mesophase sphere melt ahead of time. To improve the productivity of mesophase microsphere with excellent performance, not high temperature is necessary, but all kinds of factors such as reactive temperature and time, etc must be considered. The productivity of carbon mesophase was increased with reaction time extension at 430℃and then decreased when the temperature reach 450℃. It is indicated that 430℃is a better temperature for creation of carbon mesophase than 450℃. The large carbon mesophase have cross-shaped distinction stripe, but there are only light spot in small one. Carbon mesophase is a good raw material to prepare active carbon with high-dense and high specific area because of it′s anisotropy and high specific area. The effect of different content ofγ-resin on creation and performance of carbon mesophase. It is deduced that aromatics molecules with side chain and cycloparaffin structure inγ-resin can reduce the viscosity of melt asphalt.The mold pressing samples have a high volume shrinkage in heat treatment which reach 36.19% at 1300℃; The volume density of specimens increased with the temperature, which increased from 1.23 g/cm3 to 1.62 g/cm3 without heat treatment and at 1300℃respectively. The mechanical property of mold pressing carbon mesophase samples improved obviously compare to traditional ones. The flexural strength and compression strength reach 50MPa and 202.92MPa respectively. The dense microstructure was received by heat treatment at 1300℃, and the size of pores in the surface below 5μm, which less than the conventional graphite materials with pore size 90-100μm. The strength of carbon mesophase mold pressing samples was increased with dwell time and then decrease. The best mechanical property will be gained with a 2h dwell time. The specific area of active carbon is different due to different activating agent. The experimental result shows that KOH is better than K2CO3 as activating agent. The specific area and porosity of active carbon was increased with the ratio of alkali and carbon and then decreased, and the size of pore was increased with the ratio of alkali and carbon, active temperature and holding time.

Related Dissertations

  1. Hong'an dialect syntax research,H146
  2. Research of PROFIBUS-DP Typical Application System,TP273
  3. The Research on the Performance Results Application of Zhaoqing Power Supply Bureau,F272.92
  4. The Practice and Exploration of Compiling Rural Junior Middle School Art Textbooks Base on the Local Resources of Jingmen,G633.955
  5. Development and Preliminary Application of the Questionnaire on Emotional Labour of the Middle School Teacher,B841
  6. A Study on Curriculum Management in Applied Universities,G642.3
  7. Study on Proportions and Applications of Concrete with Iron Mine Tailings,TU528
  8. Signal Acquisition and Processing Platform Design and Implementation of Trawl Sonar System,S951.2
  9. The Application of Geographical Park (Room) in Secondary School’s Geography Teaching (Dissertation for Defence),G633.55
  10. Development and Preliminary Application of Junior High School Studengts’ Counter-School Culture Questionnaire,G631
  11. Traditionalcraft Dyeing’s Research and Application Design,TS193
  12. The Innovation Design and Application Research of Hand Crochet,TS941.2
  13. The Current Usage and Recommendations of Video Resource in the Excellent-quality-course in University,G642.3
  14. Characterization and Properties of capsaicin / CD system,TQ450.1
  15. Charles Tilly’s Theory of Modern State Formation,D09
  16. Management System Design and Implementation of troop strength,TP311.52
  17. Effect of Nitrogenapplication Patterns on Variation of Soil Nitrate-N and Grain Yield of Wheat and Maize,S512.11
  18. Study on Teaching of English Reading in Senior High School in the Perspective of Cohesion Theory,G633.41
  19. Commonly Used in Primary School Teaching of Ancient Chinese Poems Rhetoric Application,G623.2
  20. The Degradation of PET to Synthesize Phosphate Flame Retardants and the Study of Their Flame-retardant Performance,TQ314.248

CLC: > Industrial Technology > Chemical Industry > Non-metallic elements and their inorganic compounds, the chemical industry > Part Ⅳ family of non-metallic element and its inorganic compounds > Carbon and its inorganic compounds
© 2012 www.DissertationTopic.Net  Mobile