Dissertation > Excellent graduate degree dissertation topics show

A Study on Thermal and Mechanical Properties of Icelandic Horse Hair Fiber Reinforced Poly (Lactic Acid) Green Composites

Author: HuangChao
Tutor: Christopher M. Pastore; WangFuMei
School: Donghua University
Course: Textile Material and Textiles Design
Keywords: Green Composites Icelandic Horse Hair Fiber Thermal Conductivity Tensile Properties Model Predictions
CLC: TB332
Type: Master's thesis
Year: 2013
Downloads: 20
Quote: 0
Read: Download Dissertation

Abstract


In this work, fully biodegradable, green composite laminates were fabricated with Icelandic horse hair fibers and poly (lactic acid) resin using a hot press forming process. Composites were manufactured by hand lay-up method with fibers in both random orientation and approximately unidirectional orientation. Fiber volume fraction was varied across1,5,10,15, and20of fiber. The composites were evaluated for thermal and mechanical properties.Icelandic horse hair fiber has a hollow core which is elaborately subdivided as characterized by SEM observations. These pores retain a significant volume of air in the fibers which are expected to provide the composite with good thermal insulation. Thermal conductivity of composites were measured through Thermolab KESF-TL2C system, the results showed that the addition of Icelandic horse hair fiber significantly lowered the conductivity of the composite compared to neat PLA resin. Moreover, the thermal conductivity decreased from0.071W/m K to0.043W/m K by increasing fiber volume fraction from1%to20%. The results obtained from testing were compared to theoretical predictions based on some composite transverse conductivity models.Icelandic horse hair fibers consist of keratin which is mostly hydrophobic in the amino acid sequence and thus were able to be compatible with the same hydrophobic PLA resin to some degree. The scale cells on the fiber surface were also believed to improve the interfacial bonding between fiber and resin. The tensile stress and modulus of approximate unidirectional fiber composites were significantly larger than those of neat PLA resins as well as randomly oriented fiber composites. Randomly oriented fiber composites were found to have lower tensile stress and higher modulus compared with PLA resins, but they did not differ from each other significantly by varying fiber content in terms of these two properties. This might be explained by the fact that hand lay-up method resulted in a small part of fibers aligned in the tensile test direction. It might result from the relative long fiber length and void content existing in the randomly oriented fiber composites as well. The void content in these composites also contributed to the thermal insulation as well as reducing the tensile properties of composites. The SEM micrographs of tensile fracture surface revealed that the IHHF/PLA interactions were good but not maximized.

Related Dissertations

  1. Research and Development of Wear Resistance for Physically Disabled Men Jackets,TS941.2
  2. Study on the Dynamic Thermal Test Device of Sprinklers,TU892
  3. Relationships between Thermo-physical Properties and Physiological and Biochemical Parameters of Fruits and Vegetables and Neural Network Prediction Model on Thermo-physical Properties,TS255.1
  4. Research on the Preparation and Properties of Insulation Board Made by Silicon Calcium-Expended Perlite,TU551
  5. The Influence of the Hot-press Shear Rheology Technology on the Thermal Conductivity of Carbon Materials,TB332
  6. Thermal Conductivity and Electrical Insulation of Unsaturated Epoxy/Aluminum Nitride Composites,TQ323.5
  7. The Preparation and Properties of Carbon Foam and Its Composite,TB332
  8. The Experimental Research on Measurement of Thermal Contact Resistance of Two Contacted Solids and Thermal Conductivity,TK124
  9. Study on Properties of Micro-Scale Flow and Heat Transfer Within the Porous Electrode of SOFC,TK124
  10. Nanoparticle Tio 2 Dispersed Composite Phase Change Material for Energy Storage in Air-conditioning,TB383.1
  11. Research on Effects of Transition Metal Oxides on Thermal Conductivity of Mold Fluxes,TF777
  12. Research on the Composite Silicate Thermal Insulation Material for External Wall,TU551
  13. Heat and Mass Transfer Characteristic of Compound Adsorbents for Adsorption/desorption Process,TB61
  14. Rapid solidification microstructure and properties of titanium alloys,TG146.23
  15. Nuclear reactors with the mechanical behavior of austenitic stainless steel,TG142.71
  16. Research on the Fabrication of Ultrafine Carbon Fibers and Its Thermal Properties,TQ342.742
  17. Study on Ceramic Heat Insulation Coating for Metal Surface,TQ630.7
  18. Studies on the Preparation of MQ Resin and Its Application in Halogen Free Flame Retardant Thermal Conducting Silicone Glue,TQ322
  19. Influences of Matrix Microstructure Parameters on Thermal Properties of Corundum Based Castables,TQ175.73
  20. Properties of β-SiC_p/Al Electronic Packaging Material Fabricated by Pressureless Infiltration,TN604
  21. Research on Thermal Conductivity of Particle Reinforced Aluminum Matrix Composites,TB331

CLC: > Industrial Technology > General industrial technology > Materials science and engineering > Composite materials > Non-metallic composite materials
© 2012 www.DissertationTopic.Net  Mobile