2006年3月1日 · The FT-IR analyses of the PU-urea-imide coating films show dependence of phase separation on the nature of chain extender. Surface characterization data from AR-XPS suggests the dependence of phase segregation behaviour on the nature of the chain extender, which also supports the FT-IR observations.

2023年7月26日 · Here, we report a CuWO 4 catalyst with native bimetallic sites that achieves a high urea production rate (98.5 ± 3.2 μg h −1 mg −1cat) for the co-reduction of CO 2 and NO 3− with a high Faradaic...

2025年1月1日 · With urea mass ratio of 2.0 %, UREA/TMC membrane showed lowest surface contact angle, highest surface Zeta potential and pore size, which exhibited a maximum pure water flux of 389.3 LMH/bar. For piggery wastewater purification, the optimal UREA/TMC membrane enabled efficient and simultaneous removal of chemical oxygen demand (COD, 94.4 % ...

Urea was incorporated as nitrogen source in a hydrogel fertilizer. Potassium persulfate (KPS) and N,N᾽-methylenebis acrylamide (MBA) were used as the initiator and cross-linker, respectively ...

2001年12月1日 · In the current work a study is made, by high resolution XPS, of individual components of a model clear coat system based on a commercial coil coating and of the cured coating itself. This includes the main component of the coating, an epoxy resin, the crosslinking agent (a urea formaldehyde resin) and also the flow agents.

GCN was prepared by pyrolysis of agriculture urea precursor and characterized using XRD, UV-visible, FTIR, XPS and HRTEM techniques and observed 3D mesoporous structure.

Developing efficient electrocatalysts for urea oxidation reaction (UOR) can be a promising alternative strategy to substitute the sluggish oxygen evolution reaction (OER), thereby producing...

2002年10月3日 · A series a coil coating primers, based on high-molecular-weight epoxy resins and a urea formaldehyde crosslinking agent, have been investigated by angle-resolved XPS (ARXPS) analysis. The addition of a low amount of flow agent additive (<0.2 wt.%) in the formulations induced significant changes in the surface composition and the peak-fitted ...

2025年3月26日 · In-depth N 1s X-ray photoelectron spectroscopy (XPS) analysis demonstrates that the CEI layer of NFM positive electrodes cycled in PCIE is enriched with cyano (398.8 eV), -NCO (400.4 eV), and urea ...

2021年8月4日 · New, linear, segmented poly(peptide-urethane-urea) (PPUU) block copolymers are synthesized and their surface compositions are characterized with angle dependent X-ray photoelectron spectroscopy (ADXPS) and time-of-flight …