The Combined Inhibitory Action And Development Of Three Low-toxic Mould Inhibitors

To fungicides, there is need for improved systems that are less toxic, more environmentally acceptable and high efficiency. Apply the food preservative and antibiotic to control microbial biodeterioration of leather. Perpendicular experiment and corpuscular count are used to study the antifungal activity of potassium sorbate , sodium diacetate and nystatin. The results indicated that the minimum inhibitory concentration of potassium sorbate and sodium diacetate was 3.0g /L, 5.0g/L respectively, pH was 4.0. the lower the pH of potassium sorbate and sodium diacetate solution,the higher the inhibitory mould action was. The minimum inhibitory concentration of nystatin was 3.0×104μ/mL at pH 2.0. The change of the pH didn't influence the function of nystatin. The combined inhibitory action tends to be enhanced when pH was 4.0 and potassium sorbate's concentration was 1.0g/L, sodium diacetate's was 4.0g/L and nystatin was 1.0×104μ/mL. Comparing with their minimum inhibitory concentration, the concentration of potassium sorbate, sodium diacetate and nystatin used in the combined mould inhibitory experiments was decreased 2.0g/L , 1.0g/L, 2.0×104μ/mL respectively. The results of using the combined fungicides on the leather showed that the Ts of the leather with fungicides and the leather without was almost the same. It indicated that the fungicides did not influence the chrome tannage. The optimal time to add the combined fungicide in was 1.5h after adding hot water. Adding the combined inhibitors in tanning was better than using nystatin only. The tensile strength of the leather treated with fungicides was higher than that of the mildewed leather. The effect of dipping the wet blue in the combined inhibitors was better than that of the spraying samples.