本文選題：柔性電子　切入點：PDMS　出處：《揚州大學》2017年碩士論文　論文類型：學位論文

【摘要】：柔性電子是一門新興的技術(shù),柔性電子技術(shù)的發(fā)展很有可能帶來一場電子技術(shù)革命,極大的改變我們的生活。早期研究者們試圖用柔性有機材料替代傳統(tǒng)的無機半導體,目前主流的設計理念是將無機半導體例如硅置于柔性有機基體之上,通過力學結(jié)構(gòu)設計并利用基體的柔性實現(xiàn)整體的可彎曲與可延展,這樣做可使柔性電子產(chǎn)品兼?zhèn)漭p、薄與高可靠性等特點。柔性電子目前尚處于初步階段,很多理論還未建立,實驗還不完善,因此十分有必要對其進行進一步探索和研究。針對將無機半導體置于柔性有機基體之上這種設計思路,主要有三種典型的結(jié)構(gòu):波紋狀結(jié)構(gòu)、精確受控屈曲結(jié)構(gòu)和島橋結(jié)構(gòu)。本文將沿著波紋狀結(jié)構(gòu)展開研究,主要探索柔性基板材料PDMS的相關(guān)力學性能以及PDMS的表面改性方法。首先成功探索了一套制做柔性基體PDMS的工藝流程,PDMS由兩種溶液混合后固化形成,不同的混合比將產(chǎn)生不同性能的PDMS。接著利用組裝的測力裝置對PDMS做拉伸實驗,測試彈性模量,繪制拉伸曲線,PDMS在2%的變形范圍內(nèi)一直處于線彈性小變形階段,胡克定律完全適用。通過數(shù)字散斑技術(shù)測量了 PDMS的泊松比以及平直狀PDMS在拉伸狀態(tài)下表面不同點的應變值。接下來對比了紫外照射改性和等離子改性對PDMS的影響,利用測角軟件測試了經(jīng)改性后PDMS表面的接觸角,結(jié)果顯示等離子體改性更加快捷高效。利用等離子機成功鍵合了 PDMS,分析了功率、氣體流量、處理時間、表面清潔度等參數(shù)對鍵合效果的影響,利用拉伸機、數(shù)字散斑和有限元比較了鍵合后PDMS的鍵合強度。等離子體鍵合傳統(tǒng)的方法是采用純氧或純氮,鍵合后通常需用重物按壓數(shù)小時。本文則采用了空氣,使PDMS能夠在極短的時間內(nèi)鍵合并擁有足夠的鍵合強度。最后利用有限元軟件分析了正弦型波紋結(jié)構(gòu)的PDMS所受應力應變,比較了波幅、波長、厚度等幾何參數(shù)對最大應力應變的影響以及波峰波谷及介于波峰波谷的中部位置處各點各方向的應力應變。本文工作進一步豐富了柔性電子領(lǐng)域中關(guān)于PDMS基體制備、材料性能測試、表面改性及鍵合等問題的實驗方法研究,包括工藝過程的認知,有助于類似問題的探究及相關(guān)機理的澄清。
[Abstract]:Flexible electronics is a new technology, the development of flexible electronics technology is likely to bring about an electronic technology revolution, greatly change our lives. Early researchers tried to replace traditional inorganic semiconductors with flexible organic materials. At present, the mainstream design idea is to place inorganic semiconductors such as silicon on the flexible organic matrix, and to design and utilize the flexibility of the matrix to achieve the bending and extensibility of the whole by means of mechanical structure design, which can make flexible electronic products both light and light. The characteristics of thin and high reliability. The flexible electron is still in the initial stage, many theories have not been established, and the experiment is not perfect. Therefore, it is necessary to further explore and study it. There are three typical structures for the design of inorganic semiconductors on flexible organic matrix: corrugated structure. The exact controlled buckling structure and island bridge structure. This paper will study along the corrugated structure. The related mechanical properties of flexible substrate material PDMS and the surface modification method of PDMS were studied. Different mixing ratio will produce PDMS with different properties. Then the tensile test of PDMS is done by using the assembled force measuring device, the modulus of elasticity is tested, and the drawing curve of PDMS is always in the small deformation stage of linear elasticity in the deformation range of 2%. Hooke's law is fully applicable. Poisson's ratio of PDMS and strain value of surface of straight PDMS under tensile state are measured by digital speckle technique. The effects of external irradiation modification of violet and plasma modification on PDMS are compared. The contact angle of the modified PDMS surface was tested by angle measuring software. The results show that the plasma modification is faster and more efficient. The influence of surface cleanliness and other parameters on bonding effect was studied. The bonding strength of PDMS after bonding was compared by means of drawing machine, digital speckle speckle and finite element method. The traditional method of plasma bonding was pure oxygen or pure nitrogen. In this paper, air is used to make PDMS have sufficient bonding strength in a very short time. Finally, the stress and strain of sinusoidal corrugated PDMS are analyzed by using finite element software. The amplitudes and wavelengths are compared, The effect of geometric parameters such as thickness on the maximum stress and strain, and the stress and strain in all directions of the peak trough and the point between the middle of the peak trough. The work in this paper further enriches the preparation of PDMS matrix in the field of flexible electronics. The experimental research on the properties of materials, surface modification and bonding, including the cognition of the process, is helpful to the exploration of similar problems and the clarification of related mechanisms.
【學位授予單位】：揚州大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：O634.41

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