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A Study on the Tribological Properties of Self-assembled Method Treated Nano-La 2 O 3 Filled PTFE/PEEK Composites
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In this article, the surface of nanometer lanthanum oxide (nano-La
2
O
3
) was modified with n-octadecyltrichlorosilane (OTS). Meanwhile, the influence of OTS on the tribological properties of nano-La
2
O
3
/PTFE/PEEK nanocomposites was investigated. For comparing, unmodified and coupling agent KH-550 modified nano-La
2
O
3
were also used. Results indicate that OTS can be successfully assembled on the surface of nano-La
2
O
3
, which increases the water contact angle of nano-La
2
O
3
significantly and reduces the aggregation behavior of nano-La
2
O
3
. Thus the dispersion and compatibility of nano-La
2
O
3
in the polymer matrix are improved. At 10 wt% nano-La
2
O
3
filler content, the wear rate of nano-La
2
O
3
/PTFE/PEEK composites reaches the lowest value, which is 2.27 times lower than that of PTFE/PEEK composites. OTS treated nano-La
2
O
3
filled PTFE/PEEK composites can form a uniform transfer film on the counterpart surface, while unmodified nano-La
2
O
3
cannot. Results also show that the degree of crystallinity of OTS modified nano-La
2
O
3
filled PEEK is 2.6 times higher than that of unmodified nano-La
2
O
3
filled PEEK, and it is obviously higher than that of pure PEEK.
SAGE Publications
Title: A Study on the Tribological Properties of Self-assembled Method Treated Nano-La
2
O
3
Filled PTFE/PEEK Composites
Description:
In this article, the surface of nanometer lanthanum oxide (nano-La
2
O
3
) was modified with n-octadecyltrichlorosilane (OTS).
Meanwhile, the influence of OTS on the tribological properties of nano-La
2
O
3
/PTFE/PEEK nanocomposites was investigated.
For comparing, unmodified and coupling agent KH-550 modified nano-La
2
O
3
were also used.
Results indicate that OTS can be successfully assembled on the surface of nano-La
2
O
3
, which increases the water contact angle of nano-La
2
O
3
significantly and reduces the aggregation behavior of nano-La
2
O
3
.
Thus the dispersion and compatibility of nano-La
2
O
3
in the polymer matrix are improved.
At 10 wt% nano-La
2
O
3
filler content, the wear rate of nano-La
2
O
3
/PTFE/PEEK composites reaches the lowest value, which is 2.
27 times lower than that of PTFE/PEEK composites.
OTS treated nano-La
2
O
3
filled PTFE/PEEK composites can form a uniform transfer film on the counterpart surface, while unmodified nano-La
2
O
3
cannot.
Results also show that the degree of crystallinity of OTS modified nano-La
2
O
3
filled PEEK is 2.
6 times higher than that of unmodified nano-La
2
O
3
filled PEEK, and it is obviously higher than that of pure PEEK.
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