Environmental And Multi Reinforcing Effects Of
Micro And Nano Fibers On Adhesion Properties
Of Slow Setting Epoxy Adhesives
Author(s)
J. R. Lee, B. S. Kim, B. K. Park, D. H. Oh & S. N. Lee
Abstract
The chopped PVA fibers and vapor grown carbon nano tube (VGCNF) were
used in reinforcing a room temperature curable epoxy resin system. This epoxy
based nano-composite adhesive was used to attach Sus 316 steel plates. We have
prepared the samples in spring and summer to check the environmental effects
on the adhesion properties. The maximum contents of PVA fiber and VGCNF
were 1.39 and 0.61%, respectively. The samples have been preserved for two
months at the laboratory to experience real environmental change. The mean
temperature and moisture were 22°C and Relative Humidity of 52% for dry
spring weather and 32°C and Relative Humidity of 85% for summer weather
with monsoon. The addition of VGCNF was always helpful to increase the
adhesion strength with the studied concentrations. The measured highest increase
of adhesion strength was 1.84 times in the specimens with 0.61 wt% of VGCNF
prepared in spring. The reinforcing effect by PVA fiber addition was
dramatically changed by the concentration and seasonal environment. The
maximum reinforcing effect on adhesion strength has been obtained with
0.35 wt% of PVA fiber. The increasing ratio of the strength was 3.01 times. But
with the higher concentration of PVA fiber caused a very sharp decrease of
adhesion strength. The combination effect of these two reinforcing materials is
useful in low addition concentration, 0.35 wt%, of PVA fiber also with the low
addition concentrations, 0.15 and 0.3wt%, of VGCNF.
Keywords: VGCNF, PVA fiber, environmental, multi reinforcing, nano.
Keywords
VGCNF, PVA fiber, environmental, multi reinforcing, nano
Related Book
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