表面活性剂浓度对煤岩润湿性影响的实验研究

在煤层气开发过程中,钻井液不可避免地会与煤岩直接接触,其中的外加剂会影响煤岩的表面性质,从而影响煤层气的解析与流出。基于煤粉自吸速度法,开展了不同表面活性剂浓度对煤岩润湿性的影响实验,实验结果表明煤岩亲水性随表面活性剂浓度而变化。该研究为钻井液体系性能调配提供了技术指导,有助于保护储层并提高煤层气产能。     

钻井液pH值对煤岩润湿性的影响研究

在煤层气储层钻井过程中,钻井液与煤岩及裂缝表面充分接触,其酸碱度直接影响煤岩表面的润湿性,进一步影响煤层气的渗流。因此,开展钻井液pH值对煤岩润湿性的影响研究具有重要的实际意义。通过实验研究了不同钻井液pH值对煤岩润湿性的影响规律,认为煤岩润湿性随着pH值先减小后增大再又减小,pH值为9时煤岩的亲水性最弱,加入表面活性剂会进一步减弱煤岩的亲水性。该结论为钻井液体系优选与优化钻井液性能提供了有力的技术指导,有助于保护储层并提高煤层气产能。     

用表面活性剂改进PP树脂的亲水性

本文简述了用表面活性剂改进ＰＰ树脂的亲水性的实验过程,表面活性剂选择的讨论及ＰＰ＋ＯＰ体系的综合性能评价。     

表面活性剂对煤炭洗选性能的作用

介绍了表面活性剂及有着化合物对煤炭洗选性能的作用,如控制煤尘、浮选精选、将煤分散于水中便于管道输送并用作燃料。     

表面活性剂溶液润湿行为研究进展

润湿是指溶液在固体表面的铺展过程。本文主要从溶液铺展能力、表面活性剂吸附和固体表面性质等三个方面综述了表面活性剂溶液在固体表面的润湿行为及其研究和进展。     

表面活性剂对甘蓝叶子润湿性能试验

研究了十二烷基硫酸钠（SDS），十二烷基苯磺酸钠（LAS），烷基酚聚氧乙烯醚（OP－10），异辛醇聚氧乙烯醚（JFC）以及LAS与OP复配体系对甘蓝叶子的润湿性能。结果表明：单一表面活性剂OP润湿性能较好，LAS与OP复配体系的润湿性能与OP相近。     

非离子表面活性剂对聚酯织物和棉织物的润湿性

本文就非离子表面活性剂对聚酯只和和棉织物的润湿性能进行了试验研究。结果表明，非离子表面活性剂能够改善聚酯纤维系统转变水或转移水溶液的性能。     

三硅氧烷表面活性剂性能评价

研究了以烯丙基聚醚和七甲基聚三硅氧烷为原料的三硅氧烷表面活性剂中原料烯丙基聚醚中EO的聚合度、产品浓度与产品的表面张力之间的关系。三硅氧烷表面活性剂作为农药喷雾助剂,其最合理的EO聚合度的取值应该在4～8之间。当其浓度达到0.04%aq时,即可使溶液的表面张力达到21～22mN/m,从而使药液在叶片表面获得良好的润湿和铺展。     

表面活性剂在涂料技术中的应用

本文论述了表面活性剂在涂料的乳化聚合、清洗、润湿、分散、消泡等方面的应用。对涂料的动态表面张力效应及涂料技术中的问题和可能的解决方法都进行了讨论。     

Investigation of Interfacial Tension Reduction,Wettability Alteration,and Oil Recovery Using a New Non-ionic Oil-Based Surfactant from Gemini Surfactants Family Coupled with Low-Salinity Water: Experimental Study on Oil-Wet Carbonate Rock

Low-salinity surfactant (LSS) flooding is a combined enhanced oil recovery (EOR) technique that increases oil recovery (OR) by altering the rock surface wettability and reducing oil–water interfacial tension (IFT). In this study, optimum concentrations of several types of salt in distilled water were obtained on the basis of IFT experiments for the preparation of low-salinity water (LSW). Then, a new oil-based natural surfactant (Gemini surfactant, GS) was combined with LSW to investigate their effects on IFT, wettability, and OR. Experimental results showed that LSW is capable of reducing IFT and contact angle, but the synergy of GS and the active ions Mg²⁺, Ca²⁺, and SO₄²⁻ in LSW was more effective on IFT reduction and wettability alteration. The combination of 1000 ppm MgSO₄ and 3000 ppm GS led to a decrease in contact angle from 134.82° to 36.98° (oil-wet to water-wet). Based on core flooding tests, LSW injection can increase OR up to 71.46% (for LSW with 1000 ppm MgSO₄), while the combination of GS and LSW, as LSS flooding, can improve OR up to 84.23% (for LSS with 1000 ppm MgSO₄ and 3000 ppm GS). Therefore GS has great potential to be used as a surfactant for EOR.     

表面活性剂对酚醛泡沫塑料性能的影响研究

采用四种表面活性剂体系,包括硅酮系表面活性剂DC-193、非硅酮系表面活性剂吐温-80、DC-193与吐温-80复配体系,以及JFC复配体系,研究了不同表面活性剂体系对酚醛泡沫性能的影响。研究结果表明：采用DC-193与吐温-80复配体系时,泡沫的综合性能最好。采用SEM观察了泡沫的孔结构,还进一步研究了DC-193与吐温-80。复配体系的用量对泡沫表观密度和吸水率的影响,并简单分析了机理。     

不同表面活性剂对渣油-盐水体系分散性能的影响

通过克炼渣油-盐水体系分散性试验,考查了不同种类的表面活性剂对无机盐水溶液在渣油中的分散性能的影响.试验结果表明:水溶性单剂十二烷基硫酸钠,油溶性单剂HFYQ-C分散效果比较理想,表面活性剂复配存在正(负)协同效应.     

淀粉基表面活性剂烷基糖苷的研究

论述了新型淀粉基表面活性剂烷基糖苷的合成方法及性能，利用天然原料淀粉在酸催化剂的存在下，直接与低碳醇进行转糖苷化反应合成烷基糖苷。     

Improvement of Low-Rank Coal Flotation Based on the Enhancement of Wettability Difference between Organic Matter and Gangue

The main reason for low separation efficiency in low rank coal (LRC) flotation was the small wettability difference between organic matter and gangue. To improve LRC flotation response, a new method based on the expansion of wettability difference was proposed in this investigation. This method is that changing the adsorption liquid environment (adding Ca²⁺) to enhance the selective adsorption of surfactants on the surface of organic matter and increase its hydrophobicity, meanwhile applying ultrasonic desorption to remove the surfactants adsorbed on the gangue. The experiments were conducted on organic matter, gangue, and raw coal and combined with surfactant adsorption/desorption capacity, FTIR, and wetting heat determination to explore the underlying mechanism. The best flotation performance of raw coal was obtained when desorption time was 30 s. Surfactant adsorption results indicated that Ca²⁺ could promote the adsorption of surfactant on organic matter, but has insignificant effect on gangue. Under ultrasonic condition, surfactant capacity adsorbed on gangue decreased in the presence of Ca²⁺, but the addition of Ca²⁺ could inhibit surfactant desorption. However, in the raw coal, the surfactants could be removed from gangue surface under ultrasonic and Ca²⁺ because of the low proportion of gangue in raw coal and weaker adsorption strength of Ca²⁺ on gangue, as indicated by the ash reduction. Wetting heat results suggested that wettability difference between organic matter and gangue was expanded after ultrasonic treatment. This study may have some guiding significance for improving LRC flotation.     

基于低渗透油藏驱油用的表面活性剂研究

针对传统低渗透油藏开采中,采用水驱采收率低和开发效果差的问题,提出一种无碱的阴离子-非离子表面活性剂体系。为验证该表面活性剂性能,对上海石油化工研究院合成的表面活性剂体系的界面张力进行实验。通过实验得到SHPC7体系性能最佳,能快速得到界面张力平衡状态。然后,配置不同浓度的SHPC7,并对其界面张力进行观察,从而得到其最佳的实验浓度。最后,通过模拟低渗透油藏环境,就SHPC7表面活性剂在乳化性能、驱油性能等进行评价,并将其与AOS表面活性剂比较。实验结果表明,在实验环境下SHPC7的乳化性能要优于AOS表面活性剂,同时随着SHPC7的加入,其采收率可提高15%。由此说明SHPC7体系在提高低渗透油藏开采方面具有很好的作用。     

表面活性剂对土壤石油污染物微生物降解的影响

选用了四种表面活性剂对辽河油田石油污染土壤微生物降解的影响进行了研究。研究表明，表面活性剂在浓度低于50mg/L时，促进作用和抑制作用都不明显；而当浓度高于100mg/L时，即高浓度时，对微生物除油有显著抑制作用。当添加H2O2和不同氮源时，发现与上述结果相类似。