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光學(xué)接觸角測量儀有哪些測試方法？

更新時間：2023-04-10

點擊次數(shù)：2368

　　光學(xué)接觸角測定儀是一種簡單、快速、靈敏的方法測量固體表面的潤濕性。且可間接測量固體表面能與液體表面張力。可廣泛應(yīng)用于PCB、晶圓(芯片)、LCD、LED行業(yè)的快速檢測接觸角和水滴角用。適用于高要求的表面研究和質(zhì)量控制。

　　光學(xué)接觸角測量儀常用的3種測試方法有：

　　1、鉑金板法

　　此法主要是將鉑金板深入液體并拉起，或采用多點浮力測試(已知鉑金片高度)、F校正因子完成相關(guān)參數(shù)的修正，獲得表面張力值.在測試過程中可能存在材質(zhì)、深度及老化時間不穩(wěn)定等問題，使用時應(yīng)加以關(guān)注。

　　2、插板法

　　該方法也稱之為傾板法，就是將固體板插入液體時，只有板面與液體夾角為接觸角時，液面才平直伸至三相交界處，不出現(xiàn)彎曲。這一方法避免了做切線的困難性，測量準(zhǔn)確度有所提高，但用液體量相對較大。

　　3、懸滴法

　　懸滴法是測量表面及界面張力的常用方法，在測試過程中需要玻璃樣品池，通過測試液滴輪廓特征，利用揚氏方程對表面張力進(jìn)行計算。液滴越大，計算所得結(jié)果就越好。

　　該設(shè)備主要用于測量液體對固體的接觸角，即液體對固體的浸潤性，并可以測量和計算表面張力/界面張力、表面自由能, 例如塊狀材料、纖維材料、紡織材料等，粉末樣品在壓片后也可測量。對石油、印染、噴涂等行業(yè)的科研生產(chǎn)有非常重要的作用。

上一條自動接觸角測量儀有誤差嗎？
下一條旋轉(zhuǎn)滴界面張力儀在化學(xué)領(lǐng)域中的應(yīng)用

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光學(xué)接觸角測量儀有哪些測試方法？

光學(xué)接觸角測量儀有哪些測試方法？