摘要
碳纳米管通过化学气相沉积工艺制备,碳纳米管直径10～30nm,纯度>90%。碳源为乙炔、铁/镍复合催化剂。加入适量的有机溶剂丙酮溶解环氧树脂,然后加入碳纳米管。分别高速搅拌和超声处理30min,加入固化剂乙二胺搅拌均匀,超声10min除去气体后,浇铸在铝板上制成吸波涂层。TEM检测碳纳米管。反射率扫频测量系统HP8757E标量网络分析仪检测吸波性能。碳纳米管和环氧树脂比例为1∶100时,3mm厚吸波层试样吸波峰出现在14 32GHz,吸波峰值R=-10 01dB,吸波频带宽度为2 16GHz(R<8dB)。厚度增加到9mm,在11GHz和17 83GHz出现双吸波峰,最大吸波峰出现在17 83GHz峰值R=-9 04dB,带宽约1GHz(R<8dB)。比例调整为5∶100时,波峰出现在7 91GHz,峰值加大到R=-13 89dB,带宽度达到3 19GHz(R<8dB)。
Multiwall Carbon nanotubes (MWNTs) were synthesized by chemical vapor deposition (CVD) process.Acetylene was used as carbon source and Fe and Ni as catalyst.Epoxy resin was solubilized in organic solvent acetone and then MWNTs were added to the polymer solution. After stirring and sonicating for 30 minutes respectively,liquid harder ethylene diamine was added to the solid suspension to polymerize the material while stirring and sonicating for 10 minutes to remove gas in composites.The polymer composite paste was then put into a aluminium plate to form the sample.Carbon nanotubes were characterized through TEM and radar absorbing properties were obtained through RAM measuring system of arch method reflectivity. When the ratio of carbon nanotubes and epoxy resin was 1∶100,the maximum absorbing peak of the composite obtained was 10.01dB at 14.32GHz and had a bandwidth of 2.16GHz(R<8dB)with 3 mm thickness.The double absorbing peaks were obtained with 9 mm thickness.When the ratio was 5∶100,the maximum absorbing peak of the composite obtained was 13.89dB at 7.91GHz and had a bandwidth of 3.19GHz(R<8dB)with 3 mm thickness.
出处
《塑料》
CAS
CSCD
2004年第5期66-69,共4页
Plastics
基金
2003年江西省科技厅科研计划项目。
