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Due to excellent stability and intrinsic low surface energy, polytetrafluoroethylene(PTFE) is widely utilized to fabricate biomimetic superhydrophobic surfaces. We proposed a facile and rapid method to obtain outstanding superhydrophobic surfaces by CO2 laser microprocessing PTFE plate. Scanning electron microscope(SEM) and contact angle measuring instrument were employed to characterize the structure...
A pH-controllable electrospun nanofibrous membrane (NFM) was successfully fabricated by functionalizing polyacrylonitrile (PAN) NFM with lysine (LYS) for selective adsorption of protein. Due to the introduction of similar α- amino acid structure to PAN NFM, the surface charges of the obtained PAN-LYS NFM can switch via changing the pH value of adsorbate solution. Benefiting from the integrated merits...
A Schirmer tear test (STT) is commonly used to gauge human tear production, especially when dry-eye symptoms present. In an STT, the rounded tip of a standardized paper strip is inserted into the lower fornix of the eye, and the wetted length extending out from the lower lid is recorded after 5min of eye closure. Longer wetted lengths suggest higher tear production rates. To date, however, there is...
The individual adsorption of a series of alkylcarboxylbetaines, including single long-alkyl dimethylcarboxylbetaine (C 12 B, C 14 B, C 16 B, and C 18 B) and didodecylmethyl-carboxylbetaine (diC 12 B), as well as fatty amide ethoxylates (C 12 MEA-EO 1 and CMEA-EO 2 ), at negatively charged Daqing sandstone/water interface at 45°C were...
Hierarchical superhydrophobic surfaces were prepared using a simple “two foil” method, which employed an interfacial reaction between an aluminum foil and a copper foil in the ammonia solution. The results from the scanning electron microscopy observations indicated that the biomimic surfaces composed of bayerite nanorods and hierarchical structures, and the X-ray diffraction patterns confirmed that...
Owing to its interesting photoelectric properties, pyrene is usually imported into a molecule as a function group. The chiral derivatives of pyrene, N-[4(1-pyrene)butyroyl]-l-phenylalanine (Py-l-Phe) and N-[4(1-pyrene)butyroyl]-d-phenylalanine (Py-d-Phe), are used in the present study in order to clarify structural discrimination and binding sites in protein by interaction with proteins at the air/water...
The conditions for preparation of O/W miniemulsions by spontaneous emulsification were studied in mixed systems of the nonionic surfactants Tween and Span. In addition to an appropriate HLB value, the constitution and structure of the mixed film on the water/oil interface is also an important factor affecting the temperature of miniemulsion formation. The experimental results showed that the inequality...
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