Formation of asymmetric belt-like aggregates from a bio-based surfactant derived from dehydroabietic acid

编号 020033402

推送时间 20220314

研究领域 林产化工 

年份 2022 

类型 期刊 

语种 英语

标题 Formation of asymmetric belt-like aggregates from a bio-based surfactant derived from dehydroabietic acid

来源期刊 Soft matter?

期 第334期

发表时间 20211110

关键词 VISCOELASTIC WORMLIKE MICELLES;  ENHANCED OIL-RECOVERY;  BETA-CYCLODEXTRIN;  SOLUBILIZATION;  BEHAVIOR;  HYDROGEL;  SVESICLES;  GROWTH; 

摘要 The morphology and physicochemical properties of ordered molecular aggregates are closely related to surfactant molecules. Herein, a rosin-based amine oxide surfactant containing a large hydrophobic group (abbreviated R-10-AO) was synthesized from dehydroabietic acid, which is an important derivative of rosin. Cryogenic transmission electron microscopy (cryo-TEM) images and small-angle X-ray scattering (SAXS) showed that at a concentration of similar to 5 mM, R-10-AO molecules formed flexible nanobelts with a thickness of only 2-3 nm. The width of these nanobelts was 50-150 nm and the length was more than 1 mu m. The formation of the stable nanobelts arose from the strong van der Waals forces of the bulky hydrophobic portions of R-10-AO in solution, facilitating the stability of the asymmetrical aggregates. Rheological tests showed that the formed nanobelts were thermodynamically stable. The entanglement of these nanobelts led to significant viscoelasticity of the solutions. The zero-shear viscosity (eta(0)) of the R-10-AO solution reached 10 Pa s at a concentration of 5 mM, which is much greater than that of most wormlike micellar solutions. This work provides the inspirations of preparing aggregates with novel properties using natural products.

服务人员 尚玮姣

服务院士 宋湛谦

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