苯基膦酸二价金属颗粒稳定油包水酸洗乳状液

IF 1.3 4区 化学 Q3 CHEMISTRY, MULTIDISCIPLINARY Journal of the Brazilian Chemical Society Pub Date : 2023-06-23 DOI:10.21577/0103-5053.20230002
V.V.S. Machado, Lilian Fernanda Martins do Amaral, A. Sotiles, R. D. de Freitas, F. Wypych
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引用次数: 0

摘要

采用水热法合成了锌(Zn-PPh)、钙(Ca-PPh)和镁(Mg-PPh)的苯膦酸盐。样品显示出层状化合物的x射线衍射(XRD)特征,基底间距在14-15 Å范围内。根据傅里叶变换红外光谱(FTIR),所有成分都显示了苯基芳香环、膦酸盐和晶格金属-氧(M-O)振动的特征带。应用不同浓度的苯膦酸盐颗粒稳定不同w/o分数凡士林油的油包水皮克林乳状液。这三种颗粒类型对油相表现出更大的亲和力(润湿性),并能通过皮克林效应稳定乳状液。经过20天的评估,Ca-PPh颗粒含有更大的乳化分数。这一结果可归因于通过扫描电子显微镜(SEM)观察到的颗粒形态。Ca-PPh颗粒的纤维状形貌增加了液滴周围表面的位阻效应,而Zn-PPh和Mg-PPh层状颗粒则倾向于形成团簇。
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Water-in-Oil Pickering Emulsions Stabilized by Divalent Metal Phenylphosphonate Particles
Phenylphosphonates of zinc (Zn-PPh), calcium (Ca-PPh) and magnesium (Mg-PPh) were synthesized by the hydrothermal method. Samples showed characteristic X-ray diffraction (XRD) patterns of layered compounds with basal spacing in the range of 14-15 Å. According to Fourier transform infrared spectroscopy (FTIR), all compositions showed the presence of characteristic bands attributed to phenyl aromatic rings, phosphonate and lattice metal-oxygen (M-O) vibrations. Different concentrations of phenylphosphonate particles were applied to stabilize water-in-oil Pickering emulsions using vaseline oil in different w/o fractions. The three particle types showed greater affinity for the oil phase (wettability) and the ability to stabilize the emulsions via the Pickering effect. Ca-PPh particles contained a greater emulsified fraction after 20 days of evaluation. This result can be attributed to the particle morphology observed by scanning electron microscopy (SEM). The fibrous morphology of Ca-PPh particles is believed to increase the steric hindrance effect at the surface around the droplets, while the Zn-PPh and Mg-PPh layered particles tended to form clusters.
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来源期刊
CiteScore
2.90
自引率
7.10%
发文量
99
审稿时长
3.4 months
期刊介绍: The Journal of the Brazilian Chemical Society embraces all aspects of chemistry except education, philosophy and history of chemistry. It is a medium for reporting selected original and significant contributions to new chemical knowledge.
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