本文選題：碳納米管薄膜　切入點(diǎn)：傳感器　出處：《沈陽航空航天大學(xué)》2015年碩士論文

【摘要】：近年來，因結(jié)構(gòu)形變引發(fā)的航空事故頻發(fā)，飛機(jī)結(jié)構(gòu)的實(shí)時(shí)健康監(jiān)測成為有效的預(yù)防手段之一，，健康監(jiān)測過程要求所用傳感器應(yīng)具有高靈敏度、結(jié)構(gòu)相容等特點(diǎn)，而傳統(tǒng)的傳感器在結(jié)構(gòu)相容方面考慮很少，且靈敏度偏低。 本文設(shè)計(jì)了一種高靈敏度的碳納米管薄膜傳感器，與結(jié)構(gòu)基體一體成型，監(jiān)測結(jié)構(gòu)應(yīng)變損傷和環(huán)境溫度變化。綜合了機(jī)械攪拌、超聲處理、離心處理等分散工藝，實(shí)現(xiàn)了碳納米管在水介質(zhì)中的單分散，首次提出噴射吸濾法制備碳納米管薄膜，利用場發(fā)射掃描電子顯微鏡和氮?dú)馕椒ū碚魈技{米管薄膜的微觀形貌及平均孔徑，電學(xué)和力學(xué)測試表明碳納米管薄膜導(dǎo)電性能優(yōu)良，電阻率為0.042Ω·cm，力學(xué)斷裂強(qiáng)度為1.45MPa。 碳納米管薄膜的傳感機(jī)理表明碳納米管薄膜的電阻隨應(yīng)變的增大而增大，隨溫度的升高而減小。應(yīng)變傳感和溫度傳感實(shí)驗(yàn)表明碳納米管薄膜對(duì)應(yīng)變靈敏度較高，拉應(yīng)變靈敏度系數(shù)分別為10.21（0~39000με）和524.79（39000~55000με），彎曲應(yīng)變靈敏度系數(shù)為188.34（0~22500με）；具有較好的應(yīng)變傳感可逆性和可重復(fù)性。碳納米管薄膜經(jīng)退火處理后，升溫過程電阻溫度系數(shù)分別為-6.57%℃-1（20~100℃）和-3.25%℃-1（100~200℃），降溫過程電阻溫度系數(shù)分別為-5.79%℃-1（20~100℃）和-2.88%℃-1（100~200℃），具有較好的溫度傳感可逆性和重復(fù)性。
[Abstract]:In recent years, due to frequent aviation accidents caused by structural deformation, real-time health monitoring of aircraft structures has become one of the effective preventive measures. The sensors used in the process of health monitoring should have the characteristics of high sensitivity and structural compatibility. However, the conventional sensors are less sensitive and less sensitive in terms of structural compatibility. In this paper, a highly sensitive carbon nanotube thin film sensor is designed, which is integrated with the structure matrix to monitor the strain damage of the structure and the temperature change of the environment. The process of dispersion such as mechanical stirring, ultrasonic treatment, centrifugal treatment and so on is integrated. The monodisperse of carbon nanotubes in water medium was realized. The spray filtration method was proposed to prepare carbon nanotube films for the first time. The microstructure and average pore size of carbon nanotubes thin films were characterized by field emission scanning electron microscopy and nitrogen adsorption. The electrical and mechanical tests show that the carbon nanotube film has good electrical conductivity with a resistivity of 0.042 惟 cm and a mechanical fracture strength of 1.45 MPA. The sensing mechanism of the carbon nanotube film indicates that the resistance of the carbon nanotube film increases with the increase of strain and decreases with the increase of temperature, and the strain sensing and temperature sensing experiments show that the film is sensitive to strain. The strain sensitivity coefficient of tensile strain is 10.21 ~ 0 ~ (39 000 渭 蔚) and 524.79 ~ (39 000) ~ (55 000 渭 蔚), respectively, and the sensitivity coefficient of bending strain is 188.34 渭 蔚 ~ (22 500) 渭 蔚 ~ (-1), which has good strain sensing reversibility and repeatability. After annealing, the carbon nanotube film is annealed. The resistive temperature coefficients of the heating process are -6.57% -1C -20 鈩

本文編號(hào)：1675954