| 引用本文: | 尚筱筱,金尚忠,马启飞,王维鸿,田震,金怀洲.基于光镊的乳液稳定性及抗酸碱性能的研究[J].材料科学与工艺,2026,(1):36-42.DOI:10.11951/j.issn.1005-0299.20240136. |
| SHANG Xiaoxiao,JIN Shangzhong,MA Qifei,WANG Weihong,TIAN Zhen,JIN Huaizhou.Study on stability and acid-base resistance of emulsions based on optical tweezers[J].Materials Science and Technology,2026,(1):36-42.DOI:10.11951/j.issn.1005-0299.20240136. |
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| 摘要: |
| 为深入研究乳液的稳定性及抗酸碱性能,本文以十四烷为油相,在水中加入油酸和聚醚胺D-230合成的两性表面活性剂制备出水包油(O/W)乳液,并对比制作阴/阳离子表面活性剂复配乳液,利用光镊技术测量乳液液滴间的相互作用力来定量研究其稳定性。实验结果显示添加两性表面活性剂能够提高乳液的稳定性,添加表面活性剂时液滴间测得最大相互作用斥力可达18.9 pN,而未添加时仅为1.1 pN。另外,表面活性剂复配后乳液液滴能够在更短距离和更大pH范围内产生更大相互作用力,添加1 mmol/L阳离子表面活性剂十六烷基三甲基溴化铵(CTAB)后,在液滴相距2.77 μm处测得最大斥力为48.2 pN,说明表面活性剂复配能够增强乳液的稳定性和抗酸碱性能。本文的研究结果有助于指导化工领域相关乳液的生产与改进。 |
| 关键词: 两性表面活性剂 水包油乳液 光镊 力学性能 抗酸碱性 |
| DOI：10.11951/j.issn.1005-0299.20240136 |
| 分类号:O648 |
| 文献标识码:A |
| 基金项目:国家自然科学基金资助项目(22202167)；国家重点研发项目(2023YFF0613603). |
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| Study on stability and acid-base resistance of emulsions based on optical tweezers |
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SHANG Xiaoxiao1, JIN Shangzhong1, MA Qifei1, WANG Weihong1, TIAN Zhen1, JIN Huaizhou2
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(1. Zhejiang Key Laboratory of Modern Metrology Testing and Instrumentation, College of Optical and Electronic Technology, China Jiliang University, Hangzhou 310018, China; 2. College of Science, Zhejiang University of Technology, Hangzhou 310014, China)
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| Abstract: |
| To conduct an in-depth study on the stability and acid/base resistance of emulsions, this paper synthesizes an oil-in-water (O/W) emulsion using dodecane as the oil phase, with the addition of oleic acid and the amphoteric surfactant synthesized from polyether amine D-230 in water. Additionally, emulsions formulated with a combination of anionic and cationic surfactants were compared. The stability of the emulsions was quantitatively investigated by using optical tweezers to measure the interaction force between the droplets of the emulsions. The experimental results showed that the addition of amphoteric surfactants significantly improves the stability of the emulsions. The maximum measured interaction repulsion between droplets with surfactants reached 18.9 pN, compared with 1.1 pN without the addition of surfactants. In addition, the emulsion droplets were able to generate greater interaction forces over shorter distances and a broader pH range after the surfactants were combined. For instance, with the addition of 1 mmol/L cationic surfactant cetyl trimethyl ammonium bromide (CTAB), a maximum repulsive force of 48.2 pN was measured at a droplet distance of 2.77 μm. This indicates that the combination of surfactants can enhance both the stability and acid/base resistance of emulsions. The results of this paper can help to guide the production and improvement of relevant emulsions in the chemical industry. |
| Key words: amphoteric surfactant oil-in-water emulsion optical tweezers mechanical property acid-base resistance |
