Engineered Janus cellulose membrane with the asymmetric-pore structure for the superhigh-water flux desalination

Yuan, Hongmei; Hao, Ran; Sun, Haodong; Zeng, Wenchao; Lin, Junkang; Lu, Shengchang; Yu, Meiqiong; Lin, Shan; Li, Jianguo; Chen, Lihui

doi:10.1016/j.carbpol.2022.119601

Cited by 21 publications

(6 citation statements)

References 48 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Accordingly, PCL nanofibers are not capable to be an ideal scaffold unless their surface wettability being modified. Fortunately, these problems can be largely addressed by applying some distinct approaches such as blending or co-electrospinning with the bioactive agents or natural polymers, surface graft polymerization, plasma treatment and wet chemical modification methods 20 – 24 .…”

Section: Introductionmentioning

confidence: 99%

Surface modification of polycaprolactone nanofibers through hydrolysis and aminolysis: a comparative study on structural characteristics, mechanical properties, and cellular performance

Yaseri,

Fadaie,

Mirzaei

et al. 2023

Sci Rep

View full text Add to dashboard Cite

Hydrolysis and aminolysis are two main commonly used chemical methods for surface modification of hydrophobic tissue engineering scaffolds. The type of chemical reagents along with the concentration and treatment time are main factors that determine the effects of these methods on biomaterials. In the present study, electrospun poly (ℇ-caprolactone) (PCL) nanofibers were modified through hydrolysis and aminolysis. The applied chemical solutions for hydrolysis and aminolysis were NaOH (0.5–2 M) and hexamethylenediamine/isopropanol (HMD/IPA, 0.5–2 M) correspondingly. Three distinct incubation time points were predetermined for the hydrolysis and aminolysis treatments. According to the scanning electron microscopy results, morphological changes emerged only in the higher concentrations of hydrolysis solution (1 M and 2 M) and prolonged treatment duration (6 and 12 h). In contrast, aminolysis treatments induced slight changes in the morphological features of the electrospun PCL nanofibers. Even though surface hydrophilicity of PCL nanofibers was noticeably improved through the both methods, the resultant influence of hydrolysis was comparatively more considerable. As a general trend, both hydrolysis and aminolysis resulted in a moderate decline in the mechanical performance of PCL samples. Energy dispersive spectroscopy analysis indicated elemental changes after the hydrolysis and aminolysis treatments. However, X-ray diffraction, thermogravimetric analysis, and infrared spectroscopy results did not show noticeable alterations subsequent to the treatments. The fibroblast cells were well spread and exhibited a spindle-like shape on the both treated groups. Furthermore, according to the 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay, the surface treatment procedures ameliorated proliferative properties of PCL nanofibers. These findings represented that the modified PCL nanofibrous samples by hydrolysis and aminolysis treatments can be considered as the potentially favorable candidates for tissue engineering applications.

show abstract

Section: Introductionmentioning

confidence: 99%

Surface modification of polycaprolactone nanofibers through hydrolysis and aminolysis: a comparative study on structural characteristics, mechanical properties, and cellular performance

Yaseri,

Fadaie,

Mirzaei

et al. 2023

Sci Rep

View full text Add to dashboard Cite

show abstract

“…3D structuring of adsorbents can circumvent some of these issues by utilizing building blocks that result in porous materials with high structural integrity. In addition, 3D porous materials can increase adsorption efficiency due to their high surface area, unhindered diffusion, and ease of functionalization. − Among the different approaches for fabricating porous 3D materials, soft material templating methods have been recognized as advantageous due to their tunability, low cost, and uncomplicated synthesis procedure. − In this regard, recent years have witnessed significant interest in the freeze-drying method for various porous materials with tailored porosity and microscopic morphology. − The precursor hydrogel’s properties, such as polymer and particle loadings, polymer molecular weight, particle size distribution and surface charge, ionic strength, pH, and processing conditions (energy input during mixing of precursor, freezing conditions) collectively influence the derived aerogel’s morphology and mechanical properties. − Several graphene-based aerogels have been employed for the adsorption of different contaminants, such as CNTs/cellulose/graphene aerogel, cellulose/poly(acrylic acid)/graphene oxide, graphene/cellulose aerogels, − and carboxymethyl cellulose/graphene oxide. − These studies utilized either thermal or chemical treatment for the regeneration process. Only a few studies have reported the use of 3D structured aerogels for adsorption and electrochemical regeneration of contaminants, including carbon/silica aerogel, carbon nanosphere/graphene composite, and carbon aerogels. , The carbon/silica adsorption capacity increased over subsequent cycles due to an increase in the porosity and roughness of the walls caused by electrochemical regeneration.…”

Section: Introductionmentioning

confidence: 99%

Electrochemical Regeneration of Highly Stable and Sustainable Cellulose/Graphene Adsorbent Saturated with Dissolved Organic Dye

Abuhatab,

Pal,

Roberts

et al. 2024

Langmuir

View full text Add to dashboard Cite

Electrochemical regeneration of adsorbents presents a cost-effective and environmentally friendly approach. Yet, its application to 3D structured adsorbents such as cellulose/graphene-based aerogels remains largely unexplored. This study introduces a method for producing these aerogels, highlighting their significant adsorption capacity for dissolved organic pollutants and resilience during electrochemical regeneration. By adjusting the ratio of hydrophobized cellulose nanofibers to graphene, the aerogels demonstrate a tunable adsorption capacity, ranging from 56 to 228 mg/g. Hydrophobization using oleic acid is vital for maintaining the aerogels’ structural stability in water. Notably, the aerogels maintain structural integrity and efficiency over at least 18 electrochemical regeneration cycles, underscoring their potential for long-term environmental applications. The increase in adsorption capacity observed after regeneration cycles, approximately 10–20% by the fifth cycle, is attributed to electrochemical surface roughening and the creation of new adsorption sites. The tunability and durability of these aerogels offer a sustainable solution for adsorption with electrochemical regeneration technology.

show abstract

“…TFC membranes are made up mainly of two parts, the active layer (formed by a polyamide layer) and a porous layer, usually made of polysulfone to avoid mechanical stress. Recent works have explored the potential of other materials to produce FO membranes, such as chitosan [ 22 ], which is extracted from crustaceans’ shells, or with bamboo pulp [ 23 ], reaching superhigh water fluxes (>100 L/(m 2 ·h)) with both membranes. One of the main causes of loss of osmotic potential in FO is the concentration polarization, which occurs mainly in the support layer due to the accumulation of salts in the porous structure or at the membrane surface [ 24 ].…”

Section: Introductionmentioning

confidence: 99%

Second-Generation Magnesium Phosphates as Water Extractant Agents in Forward Osmosis and Subsequent Use in Hydroponics

et al. 2023

View full text Add to dashboard Cite

The recovery of nutrients from wastewater streams for their later use in agricultural fertilization is an interesting approach. Wastewater recovered magnesium phosphate (MgP) salts were used in a forward osmosis (FO) system as draw solution in order to extract water and to produce a nutrient solution to be used in a hydroponic system with lettuces (Lactuca sativa, L.). Owing to the low solubility of the MgP salts (i.e., struvite, hazenite and cattiite) in water, acid dissolution was successfully tested using citric and nitric acids to reach pH 3.0. The dilution by FO of the dissolved salts reached levels close to those needed by a hydroponic culture. Ion migration through the membrane was medium to high, and although it did not limit the dilution potential of the system, it might decrease the overall feasibility of the FO process. Functional growth of the lettuces in the hydroponic system was achieved with the three MgP salts using the recovered water as nutrient solution, once properly supplemented with nutrients with the desired concentrations. This is an innovative approach for promoting water reuse in hydroponics that benefits from the use of precipitated MgP salts as a nutrient source.

show abstract

Engineered Janus cellulose membrane with the asymmetric-pore structure for the superhigh-water flux desalination

Cited by 21 publications

References 48 publications

Surface modification of polycaprolactone nanofibers through hydrolysis and aminolysis: a comparative study on structural characteristics, mechanical properties, and cellular performance

Surface modification of polycaprolactone nanofibers through hydrolysis and aminolysis: a comparative study on structural characteristics, mechanical properties, and cellular performance

Electrochemical Regeneration of Highly Stable and Sustainable Cellulose/Graphene Adsorbent Saturated with Dissolved Organic Dye

Second-Generation Magnesium Phosphates as Water Extractant Agents in Forward Osmosis and Subsequent Use in Hydroponics

Contact Info

Product

Resources

About