Abstract:

The purpose of this study was to obtain three foam formulations of great foaming and stability based on response surface methodology. The factors of response were SDS, Fc-134, 6501 and mica powder #2000 through signal factor experiments. Foaming height and foam stability were the responses to study the interaction. According to Box-Benhken method, quadratic regression model was established which was significant and reliable. Using the model to predict concentration of these reagents, the optimum concentration of SDS, Fc-134 and 6501 was 2.64%, 0.096% and 3% respectively. The optimum dosage of mica #2000 was 10g. Under the optimum conditions, the predicted value of foaming height and stable time was 1550 ml and 12.8792 min respectively, meanwhile the experimental verification was 1550 ml and 12 min respectively. The error of these was 1.05% and 6.82%.Compared with un-optimized three phases foam, optimal design of three phase foam made improvement in foaming height and stable time which were increased by 14.8% and 26.3%, respectively. Results showed that optimal designed three phases foam has a greater performance of foaming and stability than the un-optimized one. The prediction error is small. It can be used for improving foaming and stability of the three phases fire-fighting foam, providing a reference for three phases foam formulation design.

Key words: foam, powder, surfactants, response surface methodology, optimal design

摘要：

为得到发泡及稳定性能优异的三相泡沫，响应曲面法优化设计三相泡沫灭火剂基础配方。通过单因素实验确定表面活性剂及固相粉体为SDS、Fc-134、6501、2000目（6.91 μm）合成云母粉，以发泡高度及稳定时间为响应值，研究其交互作用。利用Box-Behnken方法，建立的二次回归模型显著可靠，该模型预测SDS、Fc-134、6501浓度分别为2.64%，0.096%，3%，合成云母添加量为10 g时，为最优组合，预测发泡高度1533.86 ml，稳定时间12.8792 min，实验得到发泡高度为1550 ml，稳定时间为12 min，误差分别为1.05%，6.82%。与未优化三相泡沫比较在发泡高度及稳定时间分别提高14.8%、26.3%。结果表明，经优化设计三相泡沫发泡及稳定性能较未优化三相泡沫有明显提高且响应曲面法建立的预测模型误差较小，因此，该模型可用于提升三相泡沫灭火剂的发泡及稳定性能，为三相泡沫灭火剂配方设计提供参考。

关键词: 泡沫, 粉体, 表面活性剂, 响应曲面法, 优化设计