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Effect of silane-based coupling agent on the properties of
silver nanoparticles filled epoxy composites
D.I. Tee , A. Azizan , C.H. See , K.F. Chong
Composites Science and Technology 67 (2007) 2584–2591
姓名:王俊傑
指導老師: 陳澄河 教授
日期:97年7月
Abstract
1.研究添加矽烷改質過後銀奈米微粒至環氧樹
脂中並測試它的電與機械性質之變化。
2.研究添加經過矽烷改質和未經過矽烷改質的
銀奈米微粒至環氧樹脂中，並以光學顯微鏡
探討分散性的比較。
Experimental
將矽烷改質的銀奈米粉體
chloroform
超音波振盪(30s)
馬上倒入環氧樹脂中(避免chloroform蒸發)
加入交聯劑(PEA D230)
超音波振盪(10min)
真空爐35 ℃(90min)乾燥
進行階段性升溫80 ℃ 、2小時
125 ℃ 、3小時
得到環氧樹脂奈米複合材料
Result and discussion
Fig. 1. DC conductivity of Ag nanoparticles-filled epoxy composites versus Ag
nanoparticles volume fraction. Thedots are the experimental data, whereas the line is
the data estimated by percolation law with t=3.3, s=0.28 and Vp=5vol. ％
Fig 2. Optical microgaphs on 1-μm cross
section of untreated Ag nanoparticles filled
epoxy at filler loading of (a) 3vol. ％
(magnification 310x),(b) 5 vol. ％
(magnification 310x) and (c) 8 vol. ％
(magnification 310x) .
Fig. 3. (a) Flexural modulus and (b) strength versus filler concentration of Ag
nanoparticles\epoxy composites.
Fig. 4. Comparison DC conductivity of treated Ag filled epoxy systems and
untreated Ag filled epoxy system at 4 and 5 vol. ％ filler concentration.
Fig. 5. Light microscopy micrographs reveal the degree of dispersivity of untreated
and treated Ag nanoparticles in epoxy matrix system for (a) 5 vol.％ of untreated Ag
(155 ×magnification), and (b) 5 vol.％ of treated Ag (310 × magnification).
Si-H3
C-N
-Si-O-C-
Fig. 6. FTIR spectra of composites filled with 4 vol. ％ of untreated and treated Ag
nanopowder in comparison with that of neat epoxysystem.
Fig. 7. Schematic illustration of the action mechanism of 3APTES silane coupling
agent during the formation of interface between Ag fillers and epoxy resin matrix.
Conclusions
1.從導電測量法證明添加未改質銀奈米微粒填充物濃
度含量為5vol. ％，此時環氧樹脂複合材料會從絕緣
體轉變為導體。
2.添加改質過的銀奈米微粒填充至環氧樹脂中，會產
生-Si-O-C-, C-N 和 Si-H 的鍵結，因此可以有效
改善環氧樹脂複合材料的電和彎曲性質。
THE
END