本文選題：接觸角測量儀　切入點：固體表面　出處：《江蘇大學》2017年碩士論文

【摘要】：表面潤濕性是固體表面的基本特性之一,它對材料表面潤滑、微重力制造等領域具有重要作用。固體表面潤濕性除了受表面的參數(shù)如表面基團、表面織構的影響,外場如溫度場、電場等作用也會改變其潤濕性能。本文設計制作了帶環(huán)境、溫度控制的接觸角測量儀,并基于接觸角測量儀研究溫度場作用下液滴在親水和疏水固體表面的浸潤行為。首先,本文介紹了表面效應的基本概念,例如表面自由能等,隨后介紹了楊氏方程、接觸角相關的知識以及它們的關系與應用,同時,介紹了溫度變化對潤濕性影響的最新研究現(xiàn)狀。其次,總結了常見的固體表面接觸角的測量方法、理論和其發(fā)展趨勢,包括直接測量法、間接力法以及形狀分析處理方法,為溫度控制接觸角測量儀的設計提供基礎知識支持。然后,利用光學測量與形狀分析法相結合的方法,設計和制作了一臺帶環(huán)境、溫度的接觸角測量儀器,并運用Matlab圖像處理模塊中的圖像優(yōu)化命令,使用Prewitt邊緣提取算子實現(xiàn)對三相接觸線圖像輪廓提取,進而運用擬合計算公式,求出靜態(tài)接觸角值。最后,選取和制備了光滑納鈣玻璃、光滑單晶硅片、光滑PDMS膜、PDMS微柱陣列膜等四種固體表面,利用上述接觸角測量儀,測量了溫度場下,水滴在幾種固體表面的靜態(tài)接觸角,對比研究了水滴在不同表面的靜態(tài)接觸角隨溫度的變化規(guī)律。研究結果表明,納鈣玻璃親水性表面上的水滴靜態(tài)接觸角隨著溫度的增大而減小,光滑單晶硅片表面、光滑PDMS膜表面和PDMS膜微柱陣列三種疏水表面上的水滴靜態(tài)接觸角隨著溫度的增加而增大,但變化的幅度都不大。
[Abstract]:The surface wettability is one of the basic characteristics of the solid surface on the surface of the material, it plays an important role in microgravity lubrication, manufacturing and other fields. In addition to the wettability of solid surface by surface parameters such as surface groups, effects of surface texture, such as temperature field, electric field effects can change the wettability. This paper design environment the temperature control, the contact angle measuring instrument, and based on the effect of contact angle measurement of temperature field of droplets on the wetting behavior of hydrophilic and hydrophobic solid surfaces. Firstly, this paper introduces the basic concept of surface effects, such as surface free energy, then introduces the Young's equation, the contact angle of related knowledge and their relationship. With the application, at the same time, the latest research introduces the effect of temperature on the wettability. Secondly, summarizes the common measurement methods of solid surface contact angle, the theory and the development trend of package The direct measurement method, processing method, analysis method and the shape of indirect force, to provide the basis support for the design of the temperature control contact angle measuring instrument. Then, using the combination of optical measurement and shape analysis method, the design and fabrication of a temperature environment, contact angle measuring instrument, and the use of Matlab image processing image to optimize the command module, using Prewitt edge extraction operator to achieve the extraction of the three-phase contact line contour, and then use the fitting formula, calculate the static contact angle values. Finally, the selection and preparation of sodium calcium glass smooth, smooth silicon, smooth PDMS film, four kinds of solid surface PDMS micro column array film. The contact angle measuring instrument, measuring temperature, water droplets in the static contact angle of several solid surfaces, a comparative study of the water droplets in the static contact angle changes with different surface temperature. Results The results show that sodium calcium glass hydrophilic surface water droplets on the static contact angle decreases with the increase of temperature, the smooth silicon surface, smooth PDMS film and PDMS film surface micro column array of three hydrophobic surface water droplets on the static contact angle with the temperature increasing, but the magnitude of change is not large.

【學位授予單位】：江蘇大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：O647.5;TP391.41

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