CAJ | 학술논문

　　Washburn方程是研究粉体对液体润湿性的有效工具，但实际使用存在一定的局限性。今对 Washburn方程进行了变换，并通过六甲基乙二铵二甲硫酸盐(EDAS)与六甲基己二铵二甲硫酸盐(HDAS)复配改性膨润土对水和正庚烷的润湿性验证了变换Washburn方程的可靠性，并比较了不同改性浓度及复配比例对膨润土润湿性的影响。结果表明，与钠土相比，改性膨润土对水的润湿性均有较大程度的增强，而对正庚烷的润湿性均有一定程度的减弱。50%复配比例下改性先后顺序对膨润土的水润湿性影响较小，25%HDAS和75%HDAS改性膨润土的水润湿性均较其他复配比例强。1.5CEC，25%HDAS的油水相对润湿系数β值最大，该条件下改性剂可使强亲油岩石润湿性发生改变。
　　Washburn방정시연구분체대액체윤습성적유효공구，단실제사용존재일정적국한성。금대 Washburn방정진행료변환，병통과륙갑기을이안이갑류산염(EDAS)여륙갑기기이안이갑류산염(HDAS)복배개성팽윤토대수화정경완적윤습성험증료변환Washburn방정적가고성，병비교료불동개성농도급복배비례대팽윤토윤습성적영향。결과표명，여납토상비，개성팽윤토대수적윤습성균유교대정도적증강，이대정경완적윤습성균유일정정도적감약。50%복배비례하개성선후순서대팽윤토적수윤습성영향교소，25%HDAS화75%HDAS개성팽윤토적수윤습성균교기타복배비례강。1.5CEC，25%HDAS적유수상대윤습계수β치최대，해조건하개성제가사강친유암석윤습성발생개변。
Washburn’s equation is a useful tool for studying the wettability of powder, but it has certain limitation in practice. In this paper, Washburn’s equation was transformed and its reliability was identified through the water and n-heptane wettability of bentonite modified by hexamethyl ethyl diammonium methylsulfate (EDAS) mixed with hexamethyl hexyl diammonium methylsulfate (HDAS). In addition, the effects of different concentrations and component ratios of the modifier on the wettability of modified bentonite were compared. The results show that the water wettability of modified bentonite is stronger than that of sodium bentonite, while the n-heptane wettability of modified bentonite is weaker. Meanwhile, the order of modifying has little effect on the water wettability of 50% HDAS, and the water wettability of bentonite modified with 25%HDAS and 75%HDAS are stronger than that of bentonite modified with any other component ratios. The oil water relative wettability coefficientβreaches its highest value when bentonite modified with 25%HDAS at 1.5 CEC, which indicates that the wettability of strong oil-wet rock can be converted by bentonite modified with such condition.