Optimization of Process Parameters using Response Surface Methodology for PCL based Biodegradable Composite Membrane for Water Purification

Nivedita, S.; Joseph, Shiny

doi:10.1007/s13369-020-04530-6

Cited by 13 publications

(10 citation statements)

References 46 publications

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“…The surface morphology, porosity, and homogeneousness of the dispersed Clay or TiO 2 are necessary to enhance the membrane performance (Golobostanfard and Abdizadeh, 2013;Nivedita and Joseph, 2020).…”

Section: Scan Electron Microscope (Sem)mentioning

confidence: 99%

Efficient removal of bovine serum albumin from water by cellulose acetate membranes modified with clay and titania nano particles

et al. 2023

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Modified cellulose acetate membranes with bentonite clay (CA/bent) and TiO2 nanoparticles (CA/TiO2) using the phase inversion method are successfully prepared and characterized. These Membranes are favored due to their high salt rejection properties and recyclability. The IR and EDX spectral data indicate the formation of modified membranes. The Scan Electron Microscope micrographs show that the modified membranes have smaller particle sizes with higher porosity than the neat membrane. The average pore diameter is 0.31 µm for neat cellulose acetate membrane (CA) and decreases to 0.1 µm for CA/0.05bent. All modified membranes exhibit tensile strengths and elongation percentages more than the neat membrane. The higher tensile strength and the maximum elongation% are 15.3 N/cm2 and 11.78%, respectively, for CA/0.05bent. The thermogravimetric analysis of modified membranes shows higher thermal stability than the neat membrane. The modified membranes exhibit enhanced wettability and hydrophilicity compared with cellulose acetate, by measuring the contact angle which decreases from 60° (CA) to 40° (CA/0.1bent). The ultrafiltration tests indicated that the CA/bent and CA/TiO2 are better than CA. The most efficient nanocomposite membrane is CA/0.05bent with 100% removal of (BSA) from industrial water with a flux equal to 9.5 mL/min under an applied pressure of 20 bar. Thus, this study introduces a novel ultrafiltration membrane (CA/0.05bent) that can be used effectively to completely remove bovine serum albumin from contaminated water.

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Section: Scan Electron Microscope (Sem)mentioning

confidence: 99%

Efficient removal of bovine serum albumin from water by cellulose acetate membranes modified with clay and titania nano particles

et al. 2023

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“…The measured contact angles of all composite membranes are higher than 90.6° of neat membrane, at 99.1°, 100.8°, and 103.1° for LDPE/TS‐530, LDPE/TS‐610, and LDPE/TS‐720 membranes, respectively, attributed to the incorporation of hydrophobic LDPE/f‐SiNP 9 . However, the contact angle and hydrophobicity of the membranes are also influenced by the membrane structure and porosity 7,48 . Therefore, the severe swelling of the neat and LDPE/TS‐530 membranes may cause a dramatic change in the membrane structure, resulting in a more significant reduction in the contact angle.…”

Section: Resultsmentioning

confidence: 94%

“…9 However, the contact angle and hydrophobicity of the membranes are also influenced by the membrane structure and porosity. 7,48 Therefore, the severe swelling of the neat and LDPE/TS-530 membranes may cause a dramatic change in the membrane structure, resulting in a more significant reduction in the contact angle. Upon exposure to amine adsorbent, the degree of changes in contact angle is similar to the degree of swelling in Figure 7.…”

Section: Resultsmentioning

confidence: 99%

Computational analysis of atomic binding energy for organosilicon‐ low‐density polyethylene‐coated silica embedded in polyvinylidene fluoride composite membrane for membrane gas absorption

Rosli

Paul

Low

2021

Intl J of Energy Research

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In an effort to enhance the wetting resistance and chemical stability of membrane contactors, silica nanoparticles (SiNP) have been incorporated into polyvinylidene fluoride (PVDF) membrane. These SiNP have been hydrophobically functionalized with three separate organosilicons (hexamethyldisilane, dimethyldichlorosilane, and polydimethylsiloxane) to produce TS-530, TS-610, and TS-720 SiNP. Then, they were coated with low-density polyethylene (LDPE) before adding them to the membrane casting dope. Using HyperChem, the molecular interaction between SiNP, organosilicons, and LDPE, as well as their aggregation tendency, was predicted using a semi-empirical computational approach (PM3). Both theoretical predictions and experimental results show that TS-610 and TS-720 SiNP have a high propensity to agglomerate, leading to the formation of composite membranes with large macrovoids. The HyperChem analysis, however, also indicates that LDPE/f-SiNP can resist chemical corrosion, and all composite membranes show positive binding energy interactions with amines. This enables the LDPE/f-SiNP membranes to perform better than the neat PVDF membrane with an adequate amine solution, and it remains hydrophobic after prolonged exposure.

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“…The non-significant lack of fit F-value indicates that the model has good experimental data fitting. The lack of fit measures the model’s failure to represent data in the experimental domain at points that are not included in the regression [ 46 ].…”

Section: Resultsmentioning

confidence: 99%

Synthesis and Optimization of Superhydrophilic-Superoleophobic Chitosan–Silica/HNT Nanocomposite Coating for Oil–Water Separation Using Response Surface Methodology

et al. 2022

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In this current study, facile, one-pot synthesis of functionalised nanocomposite coating with simultaneous hydrophilic and oleophobic properties was successfully achieved via the sol–gel technique. The synthesis of this nanocomposite coating aims to develop a highly efficient, simultaneously oleophobic-hydrophilic coating intended for polymer membranes to spontaneously separate oil-in-water emulsions, therefore, mitigating the fouling issue posed by an unmodified polymer membrane. The simultaneous hydrophilicity-oleophobicity of the nanocoating can be applied onto an existing membrane to improve their capability to spontaneously separate oil-in-water substances in the treatment of oily wastewater using little to no energy and being environmentally friendly. The synthesis of hybrid chitosan–silica (CTS-Si)/halloysite nanotube (HNT) nanocomposite coating using the sol–gel method was presented, and the resultant coating was characterised using FTIR, XPS, XRD, NMR, BET, Zeta Potential, and TGA. The wettability of the nanocomposite coating was evaluated in terms of water and oil contact angle, in which it was coated onto a polymer substrate. The coating was optimised in terms of oil and water contact angle using Response Surface Modification (RSM) with Central Composite Design (CCD) theory. The XPS results revealed the successful grafting of organosilanes groups of HNT onto the CTS-Si denoted by a wide band between 102.6–103.7 eV at Si2p. FTIR spectrum presented significant peaks at 3621 cm−1; 1013 cm−1 was attributed to chitosan, and 787 cm−1 signified the stretching of Si-O-Si on HNT. 29Si, 27Al, and 13H NMR spectroscopy confirmed the extensive modification of the particle’s shells with chitosan–silica hybrid covalently linked to the halloysite nanotube domains. The morphological analysis via FESEM resulted in the surface morphology that indicates improved wettability of the nanocomposite. The resultant colloids have a high colloid stability of 19.3 mV and electrophoretic mobility of 0.1904 µmcm/Vs. The coating recorded high hydrophilicity with amplified oleophobic properties depicted by a low water contact angle (WCA) of 11° and high oil contact angle (OCA) of 171.3°. The optimisation results via RSM suggested that the optimised sol pH and nanoparticle loadings were pH 7.0 and 1.05 wt%, respectively, yielding 95% desirability for high oil contact angle and low water contact angle.

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Optimization of Process Parameters using Response Surface Methodology for PCL based Biodegradable Composite Membrane for Water Purification

Cited by 13 publications

References 46 publications

Efficient removal of bovine serum albumin from water by cellulose acetate membranes modified with clay and titania nano particles

Efficient removal of bovine serum albumin from water by cellulose acetate membranes modified with clay and titania nano particles

Computational analysis of atomic binding energy for organosilicon‐ low‐density polyethylene‐coated silica embedded in polyvinylidene fluoride composite membrane for membrane gas absorption

Synthesis and Optimization of Superhydrophilic-Superoleophobic Chitosan–Silica/HNT Nanocomposite Coating for Oil–Water Separation Using Response Surface Methodology

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