本文選題：復(fù)合介電材料　切入點(diǎn)：印刷電子　出處：《北京印刷學(xué)院》2017年碩士論文

【摘要】：新型柔性壓力傳感器因?yàn)槠渚邆潇`敏度高、靈活性強(qiáng)等特點(diǎn),已被廣泛應(yīng)用于各種柔性電子器件中,擴(kuò)大了傳統(tǒng)傳感器的應(yīng)用領(lǐng)域,開(kāi)拓了新興市場(chǎng)。然而,柔性壓力傳感器較低的靈敏度以及復(fù)雜的制作工藝制約了其應(yīng)用領(lǐng)域的進(jìn)一步擴(kuò)大。為了提高柔性壓力傳感器的靈敏度,本論文從傳感器原理出發(fā)進(jìn)行分析和論證,選用納米復(fù)合材料為電容式柔性壓力傳感器的介電層材料,利用印刷法制備器件電極,提高了受力情況下器件介電層介電常數(shù)的變化率,簡(jiǎn)化了制作過(guò)程,使得器件靈敏度與制作工藝效率得到了較大提高。本論文的主要研究?jī)?nèi)容包括以下三個(gè)方面:(1)研究了碳納米管含量和長(zhǎng)徑比對(duì)復(fù)合材料介電性能、機(jī)械性能的影響;(2)將優(yōu)化后的碳納米管/聚二甲基硅氧烷復(fù)合材料(CNT/PDMS)制作成柔性壓力傳感器的介電層,探究不同復(fù)合介電材料對(duì)柔性壓力傳感器性能的影響;(3)探究基于復(fù)合介電材料的陣列式柔性壓力傳感器的印刷方法,研究絲網(wǎng)印刷工藝、電極基材表面特性對(duì)印刷陣列電極性能的影響。研究結(jié)果發(fā)現(xiàn):(1)隨著碳納米管長(zhǎng)徑比的減小,CNT/PDMS復(fù)合材料的滲透閾值增加,相同摻雜比例時(shí)的楊氏模量同時(shí)增加;(2)利用較大長(zhǎng)徑比碳納米管摻雜形成的CNT/PDMS復(fù)合材料,在壓縮狀態(tài)下介電常數(shù)增長(zhǎng)率更加明顯,其中,TNMH1(長(zhǎng)徑比為1250~3750)碳納米管為摻雜劑時(shí),復(fù)合材料介電常數(shù)在壓縮狀態(tài)下,(10kHz頻率下,35kPa壓力下)增加至原來(lái)的740%;(3)使得柔性PDMS電極基底的接觸角從110°降至40°,將納米銀導(dǎo)電油墨與導(dǎo)電高分子混合比例從10:2時(shí),油墨的導(dǎo)電性較好,絲網(wǎng)印刷得到的柔性電極穩(wěn)定性提高。本文將得到柔性壓力傳感器中,由TNMH1復(fù)合介電層組裝的器件靈敏度可以達(dá)到2.9kPa~(-1),響應(yīng)時(shí)間為50ms,且能夠?qū)崿F(xiàn)微小壓力分布測(cè)試的柔性壓力傳感器陣列,對(duì)于物體形狀,和指肢體活動(dòng)產(chǎn)生的微小應(yīng)力的測(cè)量。本文研究得到的印刷壓力傳感器有望用于可穿戴電子皮膚領(lǐng)域。
[Abstract]:Because of its high sensitivity and high flexibility, the new flexible pressure sensor has been widely used in various flexible electronic devices, expanding the application of traditional sensors and opening up a new market. The low sensitivity of the flexible pressure sensor and the complicated manufacturing process restrict the further expansion of its application field. In order to improve the sensitivity of the flexible pressure sensor, this paper analyzes and demonstrates the principle of the sensor. Using nanocomposites as dielectric layer material of capacitive flexible pressure sensor, the device electrode was prepared by printing method. The change rate of dielectric constant of dielectric layer was improved and the fabrication process was simplified. The main contents of this thesis include the following three aspects: the content of carbon nanotubes and the dielectric properties of composites with aspect ratio of length to diameter. Effect of Mechanical Properties on the dielectric layer of the flexible pressure Sensor, CNT / PDMS was prepared from the optimized CNT / PDMS composite. To explore the effect of different composite dielectric materials on the performance of flexible pressure sensors. (3) to explore the printing methods of array flexible pressure sensors based on composite dielectric materials, and to study screen printing technology. The effect of electrode substrate surface characteristics on the performance of printed array electrodes. The results show that the permeability threshold of CNT / PDMS composites increases with the decrease of aspect ratio of CNT / PDMS. Under the same doping ratio, the growth rate of dielectric constant of CNT/PDMS composites with larger length diameter than that of carbon nanotube doping is more obvious, especially when the ratio of length to diameter is 1250 / 3750 carbon nanotubes as dopant, and the increase rate of dielectric constant is more obvious in the compression state than that in carbon nanotubes doped with carbon nanotubes with the same doping ratio, and the ratio of length to diameter is 1250 / 3750. The dielectric constant of the composite increased to the original 740kPa pressure at a compression state of 10kHz. The contact angle of the flexible PDMS electrode substrate was reduced from 110 擄to 40 擄, and the ratio of conductive nano-silver ink to conductive polymer was mixed from 10:2. The electric conductivity of ink is better, and the stability of flexible electrode obtained by screen printing is improved. In this paper, the flexible pressure sensor will be obtained. The sensitivity of the device assembled by the TNMH1 composite dielectric layer can reach 2.9 KPA ~ (-1), the response time is 50 Ms, and the flexible pressure sensor array, which can be used to measure the micro-pressure distribution, is suitable for the shape of the object. The printed pressure sensor obtained in this paper is expected to be used in the field of wearable electronic skin.
【學(xué)位授予單位】：北京印刷學(xué)院
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TB33;TP212

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