Abstract Foam dust suppression is an efficient method to control dust hazards, in which the foam morphology is closely related to its dust-suppression performance. As a commonly used foaming agent auxiliary, water-soluble polymer (e.g. carboxymethyl cellulose) is believed to be able to change foam morphology. To explore the effect of carboxymethyl cellulose (CMC) on the foam morphological characteristics, CMC was added in alpha-olefin sulfonate (AOS) solution at different concentrations and tested for the influence on bubble size, distribution and uniformity of AOS foams. The results showed that both during the foam formation and decay, the average bubble size decreased, and the foam uniformity simultaneously increased with an increase of AOS concentration, and furthermore, the size and uniformity gradually stabilized when the AOS concentration was higher than 0.1 %. After CMC addition, there is an optimal turning point (0.1 % AOS) where the effect of 800 mg/L CMC addition on foam morphology is most pronounced, the average radius of bubbles could reach a minimum of 0.13 mm, and the uniformity reaches the highest. Adding CMC of 800 mg/L in 0.1 % AOS solution is an effective way to optimize the morphology of dust-suppression foam. This study provides important reference for using water-soluble polymer to improve the performance of dust-suppression foam in engineering.

中文翻译：

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羧甲基纤维素对抑尘泡沫形态特性影响的实验研究及机理探索

摘要 泡沫抑尘是控制扬尘危害的有效方法，其中泡沫的形态与其抑尘性能密切相关。作为常用的发泡助剂，水溶性聚合物（如羧甲基纤维素）被认为能够改变泡沫的形态。为了探究羧甲基纤维素（CMC）对泡沫形态特征的影响，将CMC以不同浓度加入α-烯烃磺酸盐（AOS）溶液中，并测试对AOS泡沫的气泡大小、分布和均匀性的影响。结果表明，在泡沫形成和衰减过程中，随着 AOS 浓度的增加，平均气泡尺寸减小，泡沫均匀度同时增加，此外，当 AOS 浓度高于 0.1% 时，尺寸和均匀度逐渐稳定。添加CMC后，存在一个最佳转折点（0.1%AOS），其中添加800mg/L的CMC对泡沫形态的影响最为明显，气泡平均半径最小可达0.13mm，均匀度达到最高。在 0.1% AOS 溶液中加入 800 mg/L 的 CMC 是优化抑尘泡沫形态的有效方法。该研究为在工程中使用水溶性聚合物提高抑尘泡沫的性能提供了重要参考。并且均匀度达到最高。在 0.1% AOS 溶液中加入 800 mg/L 的 CMC 是优化抑尘泡沫形态的有效方法。该研究为在工程中使用水溶性聚合物提高抑尘泡沫的性能提供了重要参考。并且均匀度达到最高。在 0.1% AOS 溶液中加入 800 mg/L 的 CMC 是优化抑尘泡沫形态的有效方法。该研究为在工程中使用水溶性聚合物提高抑尘泡沫的性能提供了重要参考。