Dissertation > Excellent graduate degree dissertation topics show

The Preparation of Boron-based Nanomaterials and Its Modified Polyhydroxyalkanoayes Research

Author: ChenJinPeng
Tutor: TangChengChun
School: Hebei University of Technology
Course: Materials Physics and Chemistry
Keywords: PHA boron-based nanomaterials composite materials mechanical properties thermal properties
CLC:
Type: Master's thesis
Year: 2013
Downloads: 8
Quote: 0
Read: Download Dissertation

Abstract


Recently, Polyhydroxyanoate (PHA) has attracted significant attention of researchers due toits good biocompatibility and complete biodegradability. Therefore, it has potential to replace thepetroleum-based polymer materials because of its thermoforming properties and mechanicalstrength. However, its application has been limited because of the high cost of production,relatively low thermal and mechanical properties. Based on these issues, the current study mainlyexpected to fabricate boron-based nanomaterials with excellent performance of which filled inPHA to improve the performance of PHA and reduce the use of cost through the filling ofnanomaterial.This paper discusses the sythsis of boron-based nanomaterial. First of all, boron nitride (BN)was synthesized by chemical vapor deposition method. Then the surface of BN wasfunctionalized using acetone, nitric acid, butyl titanate to improve the dispersion of BN in thePHAmatrix.Besides, other boron-based nanomaterials, including magnesium (Mg2B2O5), Aluminumborate (Al18B4O33, Al4B2O9) etc were controllably synthesized. The successful formation of BNcoating on Al4B2O9nanowhiskerswas firstly reported. Through a series of experiments, it wasproven that BN coating notably improved the thermal stability of Al4B2O9,increasing thedecomposition temperature of Al4B2O9from1050℃to1400℃under Ar flow. Then the effectsof Al4B2O9, Mg2B2O5, Al18B4O33and BN coated Al4B2O9on the modification of PHA wereextensively studied. The universal testing machine and the thermal analyzer were used to testmechanical and thermal properties of PHA composites. All the boron-based nanomaterialssiginificantly improve the mechanical and thermal properties of PHA matrix. For example theaddition of Mg2B2O5into PHA increased the Young’s modulus by nearly41.5%and tensilestrength by about107.7%.

Related Dissertations

  1. Reactive Hot-Pressing and Mechanical Properties of （ZrB2-ZrO2）/BN Composites,TB332
  2. Research on Welding Characteristics of CO2 Laser-GMA Hybrid Welding for Ultra-Low Carbon Bainitic Steel,TG456.7
  3. Microstructure and Mechanical Properties of Mg-Zn-Y-Zr Alloys,TG146.22
  4. Rock-fill Concrete Experiments on Comprehensive Properties and Studies on Thermal Stress,TU528
  5. Study on the Recycling of Post-Consumer Polyester Textiles,X791
  6. Fabricationand Properties of SiC-AlN Multiphase Ceramics Prepared by Gelcasting,TQ174.62
  7. Synthesis of Polysulfones and Modification for Epoxy Adhesives,TQ433.437
  8. Study on the Synthesis and Properties of Copolyimides Derived from ODPA/Isomeric ODA,TQ323.7
  9. Fire Retardancy Performance of Poly (Ethylene Terephthalate) Containing Melamine Cyanurate,TB383.1
  10. Preparation and Characteration of Composite Microspheres with Dual-, Triple- Responsive Properties,O631.3
  11. Curing Mechanism and Properties of Fluorenyl Epoxy Resin,TQ323.5
  12. Research on Mechanical Properties of Concrete with Multi-Component Admixture,TU528
  13. Research on the Appearance Retention of Workplace Shirts Based on Fabric Mechanical Properties,TS941.1
  14. Preparation and Properties of Reinforcements/ Polyacrylonitrile Composite Nanofibers,TB383.1
  15. Research on Pre-wetting Sizing and Its Influence on the Quality of Cotton Yarns,TS105.213
  16. Structure and Characterization of Room Temperature Self-crosslinked Acrylonitrile-butadiene-styrene,TQ325.2
  17. The Research on Extrusion Parameters Through the Plate Billet of Magnesium Alloy,TG379
  18. The Effectss of Polyalcohol on the Structure and Properties of Silk Fibroin,R318.08
  19. Study on the Mechanical Properties of Short Cut Aramid Fiber Reinforced Cement Mortar Composites,TU578.1
  20. Study on the Thermal Insulation Porous Ceramics,TQ174.1
  21. Preparation of Surface-functionalized Graphene and Its Influence on the Mechanical Properties of Nanocomposite Materials,TB332

CLC: >
© 2012 www.DissertationTopic.Net  Mobile