共查询到20条相似文献,搜索用时 296 毫秒
1.
参照消泡试验标准ASTM E2407,评价了硅油类、聚醚酯类及聚醚改性聚硅氧烷类3种消泡剂的消/抑泡性能,并采用LB膜天平,测试了消泡剂对模拟起泡体系扩张模量、扩张弹性和扩张黏度的影响。结果表明,消泡剂分子吸附在气/液界面上,降低了界面膜的弹性,减小了界面膜的强度,使得界面膜厚度变薄,泡沫寿命缩短,从而达到破泡效果;消泡剂存在下的界面膜强度在一定时间内不足以形成稳定的泡沫,从而达到抑泡效果。同种消泡剂,在一定质量分数范围内,随质量分数增加,界面膜扩张模量、扩张弹性均降低,消泡剂消/抑泡性能变好;超过某一质量分数时,界面膜扩张模量、扩张弹性基本保持不变,消/抑泡性能也不再增强。不同种消泡剂,界面膜扩张模量及扩张弹性降低幅度越大,消/抑泡性能越好。因此,扩张模量和扩张弹性可以很好地解释消泡剂的消/抑泡效果。 相似文献
2.
研究了皂基、有机硅和聚醚三种消泡剂以及配方结构对洗衣液泡沫的影响。结果表明,皂基消泡剂的消泡能力较差,但有良好的抑泡能力;有机硅消泡剂消泡能力极好,但无抑泡能力;聚醚消泡剂无显著的消泡、抑泡能力;以上三种消泡剂两两组合复配,消泡、抑泡效果均好于单独使用一种消泡剂,且在各种组合中效果最好。配方中,非离子或直链烷基苯磺酸钠的比例越高,消泡、抑泡效果越好。 相似文献
3.
赵扬 《中国洗涤用品工业》2013,(10):57-60
采用罗氏泡沫仪法对阴离子型和非离子型洗衣液型进行了泡沫性能试验,并在洗衣液中添加有机硅类消泡剂或脂肪酸皂检测消泡效果。试验发现,少量的月桂酸钾皂和油酸钾皂对洗衣液有一定的抑泡作用,但破泡效果不好;有机硅类消泡剂的消泡效果优于脂肪酸皂。洗衣液中添加0.1%消泡剂3168,产品的透明度和去污力不受影响,配方稳定性很好。 相似文献
5.
6.
7.
8.
9.
王子千 《中国洗涤用品工业》2013,(5):54-58
现代工业生产中,泡沫无处不在,最直接的解决方式就是使用消泡剂,消泡剂随着消泡过程进行逐渐丧失消泡与抑泡能力,导致工业生产稳定性差。低泡沫的表面活性剂则从根本上解决了泡沫的困扰,文章介绍了目前规模化应用几种低泡沫表面活性剂的性能、生产与应用等,包括EO/PO嵌段聚醚、异辛醇磷酸酯衍生物、乙氧基化脂肪酸甲酯衍生物以及聚醚改性有机硅四大类。 相似文献
10.
现代工业生产中,泡沫无处不在,最直接的解决方式就是使用消泡剂,消泡剂随着消泡过程会逐渐丧失消泡与抑泡能力,导致工业生产稳定性差。低泡沫的表面活性剂则从根本上解决了泡沫的困扰。介绍了目前规模化应用几种低泡沫表面活性剂的性能、生产与应用等,包括EO/PO嵌段聚醚、异辛醇磷酸酯衍生物、聚醚改性有机硅以及乙氧基化脂肪酸甲酯衍生物四大类。 相似文献
11.
在甲乙酮-N-甲酰吗啉溶剂体系中,对丁烯提浓使用的进口AMERAL-1500消泡剂和国产MAF-01消泡剂的抑泡性能进行研究,结果表明,温度、溶剂中甲乙酮含量和消泡剂用量影响消泡剂的抑泡性能;AMERAL-1500消泡剂的抑泡性能比MAF-01好。 相似文献
12.
14.
根据制氢装置、合成氨装置生产需要,深入研究苯菲尔溶液的发泡机理,筛选出具有较强抗积累性、消泡性能温和而且使用方便的国产苯菲尔溶液消泡剂,并已在制氢装置投入使用。 相似文献
15.
16.
17.
Rafael F. Perez Izabel C. V. M. Santos Vitor P. Macedo Mariana T. Mendes João B. V. S. Ramalho Osvaldo Karnitz Junior Claudia R. E. Mansur 《应用聚合物科学杂志》2024,141(9):e55031
In petroleum production, silicone oil (polydimethylsiloxane or PDMS) remains the most efficient product for combating foam, despite its negative effects on petroleum contamination and catalytic refining processes. This study aimed to evaluate the defoaming action of silicone oils with varying molar masses (ranging from 3 to 110 kg·mol−1) as defoamers in crude oils with different densities (20, 26, and 30°API). The results were correlated with the dilatational rheology obtained through pendant drop tensiometry of the oil samples. The silicone samples were characterized using gel permeation chromatography and thermogravimetric analysis, while the petroleum samples underwent SARA (saturated, aromatics, resins, asphaltenes) composition analysis, density measurement, and assessment of water content. The PDMS range of 8 to 30 kg·mol−1 exhibited enhanced antifoaming efficiency for the tested oils. A plateau in efficiency was observed when antifoamers were dosed above 15 ppm. Additionally, a reverse relationship between the initial formation of foam and the elastic modulus (G') of the oil in the presence of the antifoamer was observed, suggesting that the more effective antifoamer actually increased the elasticity of the film. 相似文献
18.
就改善液压油的水解安定性、放气性及破乳化性进行了研究,试验表明金属减活剂和高碱度清净剂能改善液压油的水解安定性,清净剂还可改善液压油的破乳化性,硅型和非硅型抗泡剂对放气性和抗泡性的影响不同,需从配方技术上进行平衡,才能达到效果. 相似文献
19.
The foam performance in the presence of oil plays an important role in foam application in enhancing oil recovery. The present study systematically investigated the effect of oil type, oil content, surfactant type, surfactant concentration, alkane chain length, salinity, and polymer concentration on foam performance in both the absence and presence of oil. The results showed that oil viscosity and oil density as well as oil component all contributed to foam performance in the presence of oil. Within a certain oil content, both light oil and heavy oil had a positive effect on foam, but heavy oil had a higher tendency to stabilize the foam. The order of foam performance by different surfactants was changed by the oil. It is noteworthy that heavy oil is detrimental to sodium dibutyl naphthalene sulfonate (BM) foam. Light oil can improve foam performance while heavy oil can harm foam in some specific cases. Lower salinity, longer alkane chain length, higher surfactant concentration and the presence of a polymer all benefited foam in the presence of crude oil. 相似文献