Three-Dimensional Porous PVDF Foam Imprinted Membranes with High Flux and Selectivity toward Artemisinin/Artemether

Bian, Weibai; Zhang, Ruixuan; Chen, Xiaohui; Zhang, Chuanxun; Meng, Minjia

doi:10.3390/molecules28217452

Cited by 3 publications

(1 citation statement)

References 32 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This PEG material not only forms pores but also reduces polymer contraction, which means a more loosened and porous structure to improve the filtration. There are also some excellent papers that add removable particles to make novel filters [36,37].…”

Section: Introductionmentioning

confidence: 99%

Preparation of NaCl Particles Added Polyvinylidene Fluoride Microporous Filter and a Simple Filtration Device

Peng,

Liu,

Hao

et al. 2024

Coatings

View full text Add to dashboard Cite

Clean and pollution-free water plays a crucial role in human metabolism and is essential for everyone’s daily life. However, with industrialization, a significant amount of sewage has been produced for many years. Water resources tend to become stressed when the rate of sewage production speed is purified. Many researchers are working on sewage purification to eliminate this hidden danger. It is urgent to find an efficient, high-speed, and environmental way to purify sewage. The objective of this study is to investigate the impact of pore morphology on filtration. In addition, a Polyvinylidene fluoride (PVDF)-microporous filter (MPF) based on non-solvent-induced phase separation (NIPS) and vapor-induced phase separation (VIPS) methods was designed, the morphology and properties of a series of sodium chloride particles (NaCl-ps) added PVDF-MPF was researched, and a simple semi-automatic filtration device based on the character of this PVDF-MPF was manufactured. According to the light transmittance of filtered sewage through PVDF-MPF and NaCl-ps added PVDF-MPF, both PVDF-MPFs can remove particles in sewage. However, after adding NaCl-ps, the purification capacity of PVDF-MPF is higher than that of PVDF-MPF without adding NaCl-ps. The addition of NaCl-ps changes the morphology and improves the sewage purification capacity of PVDF-MPF.

show abstract

Section: Introductionmentioning

confidence: 99%

Preparation of NaCl Particles Added Polyvinylidene Fluoride Microporous Filter and a Simple Filtration Device

Peng,

Liu,

Hao

et al. 2024

Coatings

View full text Add to dashboard Cite

show abstract

Fabrication of PBAT Membranes with High Separation Accuracy Based on Inverse-Opal-Structural Photonic Crystals

Wang,

Fan,

Lai

et al. 2024

ACS Appl. Mater. Interfaces

View full text Add to dashboard Cite

Membrane technology is one of the most effective ways to cope with the filtration and separation. However, most polymer membranes are not uniform in pore size and have wide pore size distributions and low porosities, which restrict their application. A high-porosity homogeneous membrane with high filtration accuracy is an effective solution. Photonic crystals (PCs) with an inverse-opal (IO) structure provide a new way for preparing high-porosity homogeneous porous membranes. In this study, a rapid shear-induced assembly method for preparing biodegradable poly(butylene adipate-co-terephthalate) (PBAT) membranes based on PCs with an IO structure was proposed, and the design principles of the IO-structured PBAT membrane were investigated. Moreover, the effects of polymer solution concentrations, solvent evaporation temperature, and SiO 2 /PBAT mass ratio on the SiO 2 /PBAT PC structure, formation mechanism of shear-induced assembly, and the filtering efficiency of resultant PBAT membranes for solid−liquid separation were investigated. The study underscored the point that when the polymer concentration is in the range of 15−20 wt % and the drying temperature is at 80 °C, as the SiO 2 -to-PBAT mass ratio increases, the pore of the membrane increases, the porosity is as high as to 84.11%, and pure water flux is up to 756.19 L m −2 h −1 . After five cycles, the rejection rate of PBAT membranes for the contaminant still reached more than 99%. This study proposes a simple and rapid method for constructing an IO-structured membrane that is expected to address challenges encountered in achieving efficient and high-precision separation.

show abstract

Polyvinylidene Fluoride-Based Nanowire-Imprinted Membranes with High Flux for Efficient and Selective Separation of Artemisinin/Artemether

Meng,

Ren,

Zhang

et al. 2024

Molecules

View full text Add to dashboard Cite

A traditional phase transformation method is commonly used to prepare molecular imprinting membranes for selective separation. However, traditional molecularly imprinted polymers are mostly micron-sized particles, and the imprinting sites in their membrane are easily embedded, leading to a reduced adsorption capacity and decreased selectivity. In this study, an ultra-long nanowire with a diameter of about 15 nm was synthesized for the separation of artemisinin (ART), and its adsorption capacity was as high as 198.29 mg g−1 after imprinting polymerization. Molecular imprinting membranes were prepared, using polyvinylidene fluoride (PVDF), polyethersulfone (PES), and polysulfone (PSF) as the membrane matrix, for comparison. The average membrane pore size of PVDF-MIM was about 480 nm, and PVDF-MIM had the highest adsorption capacity (69 mg g−1) for ART. The optimal flow rate for PVDF-MIM’s dynamic adsorption of ART was 7 mL min−1. Under this optimal flow rate, selectivity experiments were carried out to obtain the separation factor of PVDF-MIM (α = 8.37), which was much higher than the corresponding values of PES-MIM and PSF-MIM. In addition, the hydrophobicity and low flux of PES-MIM and PSF-MIM lead to higher non-specific adsorption. The hydrophobicity of PVDF-MIM is lower than that of PES-MIM and PSF-MIM, which greatly reduces the non-specific adsorption of the membrane, thus increasing the selectivity of the membranes. Therefore, the effective density of the imprinting sites in the pores and the membrane structure are the main factors determining the efficient separation of molecularly imprinted membranes.

show abstract

Three-Dimensional Porous PVDF Foam Imprinted Membranes with High Flux and Selectivity toward Artemisinin/Artemether

Cited by 3 publications

References 32 publications

Preparation of NaCl Particles Added Polyvinylidene Fluoride Microporous Filter and a Simple Filtration Device

Preparation of NaCl Particles Added Polyvinylidene Fluoride Microporous Filter and a Simple Filtration Device

Fabrication of PBAT Membranes with High Separation Accuracy Based on Inverse-Opal-Structural Photonic Crystals

Polyvinylidene Fluoride-Based Nanowire-Imprinted Membranes with High Flux for Efficient and Selective Separation of Artemisinin/Artemether

Contact Info

Product

Resources

About