Electrical and Mechanical Properties of Carbon Aerogels / Phenolic Resin for Nanocomposites

Abstract:

This study used carbon aerogels (CA) and phenolic resin in fixed proportations to produce nano high polymer resin, and used poly ehtylene oxide (PEO) as the modifying agent for phenolic resin to improve the mechanical properties of phenolic resin and promote the surface conductivity. The prepared nano high polymer resin and carbon cloth were made into nano-prepreg by using ultrasonic impregnation method, and a nano-prepreg composite material was prepared by using hot compacting and cut to test pieces to measure its mechanical properties and surface conductivity as well as the influence of temperature-humidity environment (85°C/168hr and 85°C/85%RH/168hr) on mechanical properties. The result showed that the surface conductivity increased by 64.55%, the tensile strength at room temperature increased by 35.7%, the flexural strength increased by 18.4%, and the impact strength increased by 101%. In hot environment (85°C/168hr), the tensile strength decreased by 23.8%, the flexural strength increased by 3.1%, and the impact strength increased by 84.6%. In high temperature-high humidity environment (85°C/85% RH/168hr), the tensile strength decreased by 29.6%, the flexural strength decreased by 17%, and the impact strength increased by 95.7%.Introduction

• Periodical: Advanced Materials Research (Volumes 236-238)
• Pages: 1725-1730
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.236-238.1725
• Online since: May 2011
• Authors: Wei Jen Chen, Ming Yuan Shen, Yi Luen Li, Chin Lung Chiang, Ming Chuen Yip
• Keywords: Carbon Aerogels, Electrical Conductivity, Mechanical Property

References

[1] Li J, Wang X, Wang Y, Huang Q, Dai C, Gamboa S, Sebastian P J. Structure and electrochemical properties of carbon aerogels synthesized at ambient temperatures as supercapacitors. J. Non-Crystalline Solide 2008; 354: 19-24.

DOI: 10.1016/j.jnoncrysol.2007.07.024

[2] Hanzawa Y, Hatori H, Yoshizawa N, Yamada Y. Structural changes in carbon aerogels with high temperature treatment. Carbon 2002; 40 : 575-581.

DOI: 10.1016/s0008-6223(01)00150-6

[3] MA CCM, Wu HD, Lee CT. Strength of hydrogen bounding in the novolac-type phenolic resin blends. J. Polymer Science: Part B: Polymer Physics 1998; 36(10): 1721-1729.

DOI: 10.1002/(sici)1099-0488(19980730)36:10<1721::aid-polb13>3.0.co;2-b

[4] Jiang S, Qiao C, Tian S, Ji X, An L, Jiang B. Confined crystallization behavior of PEO in organic networks. Polymer 2001; 42(13): 5755-5761.

DOI: 10.1016/s0032-3861(01)00026-x