Fujimoto Akihiro, Tanaka Terumasa, Oya Masaru
Graduate School of Environment and Information Sciences, Yokohama National University.
Faculty of Environment and Information Sciences, Yokohama National University.
J Oleo Sci. 2017 Oct 1;66(10):1109-1120. doi: 10.5650/jos.ess17043. Epub 2017 Sep 15.
A method of analyzing the detergency of various soils by assuming normal distributions for the soil adhesion and soil removal forces was developed by considering the relationship between the soil type and the distribution profile of the soil removal force. The effect of the agitation speed on the soil removal was also analyzed by this method. Washing test samples were prepared by soiling fabrics with individual soils such as particulate soils, oily dyes, and water-soluble dyes. Washing tests were conducted using a Terg-O-Tometer and four repetitive washing cycles of 5 min each. The transition of the removal efficiencies was recorded in order to calculate the mean value (μ) and the standard deviation (σ) of the removal strength distribution. The level of detergency and the temporal alteration in the detergency can be represented by μ and σ, respectively. A smaller σ indicates a smaller increase in the detergency with time, which also indicates the existence of a certain amount of soil with a strong adhesion force. As a general trend, the values of σ were the greatest for the oily soils, followed by those of the water-soluble soils and particulate soils in succession. The relationship between the soil removal processes and the soil adhesion force was expressed on the basis of the transition of the distribution of residual soil. Evaluation of the effects of the agitation speed on µ and ơ showed that σ was not affected by the agitation speed; the value of µ for solid soil and oily soil increased with increasing agitation, and the µ of water-soluble soil was not specifically affected by the agitation speed. It can be assumed that the parameter ơ is related to the characteristics of the soil and the adhesion condition, and can be applied to estimating the soil removal mechanism.
通过考虑土壤类型与去污力分布曲线之间的关系，开发了一种通过假设土壤附着力和去污力服从正态分布来分析各种污垢去污力的方法。还使用该方法分析了搅拌速度对去污的影响。通过用颗粒污垢、油性染料和水溶性染料等单一污垢弄脏织物来制备洗涤测试样品。使用Terg-O-Tometer进行洗涤测试，每个洗涤周期为5分钟，重复四个周期。记录去污效率的变化，以计算去污强度分布的平均值（μ）和标准差（σ）。去污力水平和去污力随时间的变化分别可以用μ和σ表示。较小的σ表明去污力随时间的增加较小，这也表明存在一定量附着力强的污垢。一般来说，油性污垢的σ值最大，其次依次是水溶性污垢和颗粒污垢。根据残留污垢分布的变化，表达了去污过程与土壤附着力之间的关系。对搅拌速度对μ和ơ的影响的评估表明，σ不受搅拌速度的影响；固体污垢和油性污垢的μ值随着搅拌速度的增加而增加，水溶性污垢的μ不受搅拌速度的具体影响。可以假设参数ơ与污垢的特性和附着条件有关，可用于估计去污机理。
