Geng, Chengbao, et al. Journal of Environmental Chemical Engineering 11.5 (2023): 110285.
Loose nanofiltration membranes offer significant advantages in removing organic pollutants due to their high selectivity and low operating pressure. In this study, a novel zwitterionic loose polyamide separation layer was developed on a modified polyethersulfone (PES) substrate to create a ZLNF membrane with high water permeability and excellent antifouling properties. The BAPP-TMC polyamide layer was synthesized via interfacial polymerization between 1,4-bis(3-aminopropyl)piperazine (BAPP) and trimesoyl chloride (TMC). The polyamide layer was then further functionalized with zwitterions through a simple surface modification process.
Fabrication of ZLNF Membrane: First, an Im-CGO/PES substrate membrane was prepared, consisting of 16 wt. % PES, 0.5 wt. % Im-CGO, 3 wt. % PVP, and 3 wt. % PEG 400. Next, the BAPP-TMC polyamide layer was formed on the Im-CGO/PES substrate through interfacial polymerization between BAPP and TMC. Finally, zwitterionic surface modification was performed by grafting 1,3-PS to obtain the ZLNF membrane. The aqueous phase for the polymerization included CSA (2 wt. %), TEA (1 wt. %), and DMAp (0.01 wt. %) dissolved in deionized water, with BAPP dissolved at varying concentrations (0.2-1 wt. %). The organic phase consisted of 0.1 wt. % TMC in N-hexane.
The substrate was dried for 5 minutes before being placed in a mold. The aqueous phase was added for 2 minutes, followed by drying. The organic phase was added after preheating to 50°C, and the interfacial polymerization (IP) occurred for 5 minutes. The membrane was heat-treated at 80°C for 1 minute and immersed in deionized water for 12 hours to obtain the final ZLNF membrane.
Onder, Alper, and Hava Ozay. International Journal of Hydrogen Energy 52 (2024): 1220-1233.
1,4-Bis(3-aminopropyl)piperazine (BAP), a polyamine compound, has shown significant versatility in the synthesis of cyclomatrix polyphosphazene (cyclo-POPs) nanospheres, which serve as highly effective support materials for catalytic applications. Recently, BAP was employed in the precipitation polymerization with hexachlorocyclotriphosphazene (HCCP) to produce Cp-BAP nanospheres.
Synthesis of Cp-BAP: Cp-BAP polymeric materials were synthesized by adding triethylamine (TEA) and 80 mg of polyvinylpyrrolidone (PVP) to the BAP and HCCP solution in acetonitrile (50 mL), as shown in Table 1. The reaction was conducted in an ultrasonic bath at 45°C for 1 hour. Afterward, the precipitated solid was collected by centrifugation and washed sequentially with water, ethanol, and acetonitrile. The resulting Cp-BAP polymeric materials were dried in a vacuum oven to yield a white powder, which was then stored in a desiccator until use in catalyst preparation.
Mansha, Muhammad, et al. International Journal of Environmental Analytical Chemistry 103.2 (2023): 396-414.
1,4-Bis(3-aminopropyl)piperazine (BAPP) is a crucial precursor in the synthesis of functional materials due to its bifunctional amine structure. A notable application of BAPP is in the preparation of triazine-based resin (APP-TRIAZ), a novel material that demonstrates exceptional efficiency in removing organic dyes-such as methyl orange (MO), acid blue 92 (AB92), and malachite green (MG)-from aqueous solutions.
Synthesis Process
To synthesize APP-TRIAZ, 8.14 g (40.66 mmol) of BAPP was dissolved in 30 mL of anhydrous DMF and cooled to 0°C. N,N-Diisopropylethylamine (10.51 g, 81.33 mmol) was added dropwise to the solution. After stirring for 5 minutes, a solution of cyanuric chloride (5.0 g, 27.11 mmol) in 20 mL of anhydrous DMF was added dropwise over 30 minutes. The mixture was stirred at 0°C for 30 minutes, then at room temperature for an additional hour. The reaction was subsequently heated to 100°C for 24 hours. After cooling to room temperature, the solid residues were filtered, washed thoroughly with water and acetone, and dried at 60°C under reduced pressure for 2 hours. The final product, APP-TRIAZ, was obtained as a light-yellow solid in 84% yield.
What is the molecular weight of 1,4-Piperazinedipropanamine?
The molecular weight of 1,4-Piperazinedipropanamine is 200.32.
What is the molecular formula of 1,4-Piperazinedipropanamine?
The molecular formula of 1,4-Piperazinedipropanamine is C10H24N4.
What is the CAS number of 1,4-Piperazinedipropanamine?
The CAS number of 1,4-Piperazinedipropanamine is 7209-38-3.
What is the physical state of 1,4-Piperazinedipropanamine?
The physical state of 1,4-Piperazinedipropanamine is a liquid.
What percentage of actives does 1,4-Piperazinedipropanamine contain?
1,4-Piperazinedipropanamine contains 95% actives.
What are the typical applications of 1,4-Piperazinedipropanamine?
The typical applications of 1,4-Piperazinedipropanamine include use as an antistatic agent, dispersing agent, emulsifying agent, and corrosion inhibitor.
How is 1,4-Piperazinedipropanamine commonly used in the industry?
1,4-Piperazinedipropanamine is commonly used as an antistatic agent, dispersing agent, emulsifying agent, and corrosion inhibitor in the industry.
What is the chemical structure of 1,4-Piperazinedipropanamine?
The chemical structure of 1,4-Piperazinedipropanamine contains a piperazine ring and two propylamine groups.
What are the key properties of 1,4-Piperazinedipropanamine that make it valuable in various applications?
The key properties of 1,4-Piperazinedipropanamine include its antistatic, dispersing, emulsifying, and corrosion inhibiting abilities.
How does the molecular structure of 1,4-Piperazinedipropanamine contribute to its effectiveness in its typical applications?
The molecular structure of 1,4-Piperazinedipropanamine allows it to interact effectively with different compounds to fulfill its roles as an antistatic agent, dispersing agent, emulsifying agent, and corrosion inhibitor.
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