本研究使用影像數位化懸掛氣泡測量儀，量測塑化劑鄰苯二甲酸二丁酯 (dibutyl phthalate, DBP)在不同甲醇濃度 (0、1、5wt%)中之動態和平衡表面張力，藉以觀測DBP在溶液本體與氣-液界面間之質傳行為。
Langmuir模式可適確切地描述DBP水溶液(0 wt%甲醇)之平衡表面張力。首先，假設質傳機制為擴散控制，以Langmuir模式模擬DBP水溶液之動態表面張力，得出的擴散係數 1.40×10-6 cm2/s小於Wilke-Chang equation計算所得之理論擴散係數5.95×10-6 cm2/s。繼而假設質傳機制為混合控制，並以Langmuir模式模擬DBP水溶液之動態表面張力，其模擬結果與實驗之動態張力曲線相當吻合；故推測DBP在水溶液中自溶液本體質傳至氣-液界面間之行為為一混合控制程序。
使用Langmuir和Frumkin模式模擬DBP在甲醇水溶液 (1、5wt%)中之平衡表面張力；其中，以Frumkin模式較為適切。假設質傳機之動態表面張力，兩種模式皆無法描述動態張力數據，且獲得之擴散係數與Wilke-Chang equation計算所得之理論擴散係數數值不同；若假設質傳機制為混合控制並以Frumkin模式模擬，其結果能夠確切地描述DBP在甲醇水溶液中之動態張力曲線；故推測DBP在甲醇水溶液中自溶液本體質傳至氣-液界面間之行為為一混合控制程序。
Langmuir模式可適確切地描述DBP水溶液(0 wt%甲醇)之平衡表面張力，亦即DBP分子吸附在氣-液界面上時，DBP分子間作用力可以忽略；DBP在甲醇水溶液須以Frumkin模式來模擬，亦即DBP分子吸附在氣-液界面上時，DBP分子間作用力無法忽略。參數K代表分子間作用力，K > 0為分子間互相排斥，K < 0為分子間互相吸引。平衡張力得出之參數：K0wt%= 0 、K1wt% = -1.4和K5wt% = -2.7；故知DBP吸附在氣-液界面上時分子間吸引力隨溶劑甲醇濃度提高而增加。
DBP為一常用的塑化劑，常被使用在工程塑料上。因鄰苯二甲酸酯類塑化劑 (含DBP、DNOP、DEHP等) 被歸類為疑似內分泌干擾素、環境荷爾蒙，導致各國針對塑化劑濃度設定嚴格的限制。定量塑化劑是近年來被密切關注的研究議題之一。因此對於食品、生活用品、河水和廢水等有不同的方法來檢測塑化劑的濃度。DBP分子含親油基及親水基，具備降低表面張力之能力。本研究擬藉量測DBP水溶液之張力，來建立一快速、靈敏且成本低廉的檢測方法。

本研究使用影像數位化懸掛氣泡測量儀，量測塑化劑鄰苯二甲酸二丁酯 (dibutyl phthalate, DBP)在不同甲醇濃度 (0、1、5wt%)中之動態和平衡表面張力，藉以觀測DBP在溶液本體與氣-液界面間之質傳行為。
Langmuir模式可適確切地描述DBP水溶液(0 wt%甲醇)之平衡表面張力。首先，假設質傳機制為擴散控制，以Langmuir模式模擬DBP水溶液之動態表面張力，得出的擴散係數 1.40×10-6 cm2/s小於Wilke-Chang equation計算所得之理論擴散係數5.95×10-6 cm2/s。繼而假設質傳機制為混合控制，並以Langmuir模式模擬DBP水溶液之動態表面張力，其模擬結果與實驗之動態張力曲線相當吻合；故推測DBP在水溶液中自溶液本體質傳至氣-液界面間之行為為一混合控制程序。
使用Langmuir和Frumkin模式模擬DBP在甲醇水溶液 (1、5wt%)中之平衡表面張力；其中，以Frumkin模式較為適切。假設質傳機之動態表面張力，兩種模式皆無法描述動態張力數據，且獲得之擴散係數與Wilke-Chang equation計算所得之理論擴散係數數值不同；若假設質傳機制為混合控制並以Frumkin模式模擬，其結果能夠確切地描述DBP在甲醇水溶液中之動態張力曲線；故推測DBP在甲醇水溶液中自溶液本體質傳至氣-液界面間之行為為一混合控制程序。
Langmuir模式可適確切地描述DBP水溶液(0 wt%甲醇)之平衡表面張力，亦即DBP分子吸附在氣-液界面上時，DBP分子間作用力可以忽略；DBP在甲醇水溶液須以Frumkin模式來模擬，亦即DBP分子吸附在氣-液界面上時，DBP分子間作用力無法忽略。參數K代表分子間作用力，K > 0為分子間互相排斥，K < 0為分子間互相吸引。平衡張力得出之參數：K0wt%= 0 、K1wt% = -1.4和K5wt% = -2.7；故知DBP吸附在氣-液界面上時分子間吸引力隨溶劑甲醇濃度提高而增加。
DBP為一常用的塑化劑，常被使用在工程塑料上。因鄰苯二甲酸酯類塑化劑 (含DBP、DNOP、DEHP等) 被歸類為疑似內分泌干擾素、環境荷爾蒙，導致各國針對塑化劑濃度設定嚴格的限制。定量塑化劑是近年來被密切關注的研究議題之一。因此對於食品、生活用品、河水和廢水等有不同的方法來檢測塑化劑的濃度。DBP分子含親油基及親水基，具備降低表面張力之能力。本研究擬藉量測DBP水溶液之張力，來建立一快速、靈敏且成本低廉的檢測方法。

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