Polymer nanoparticles for the release of complex molecules

Alvarado, Yolanda; Muro, Claudia; Illescas, Javier; Riera, Francisco A.

doi:10.1016/b978-0-12-818433-2.00005-4

Cited by 14 publications

(9 citation statements)

References 106 publications

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“…The increase in the water content could be attributed to the hydroxyl group on the surface of the PVA molecule. 37 The porosity of the membranes is relative to the EWC. The higher the porosity, the higher the water content of the membrane.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

“…54 However, coating the membrane surface with PVA reduced the contact angle of the pure PSF membrane from 70.55 to 57.58°. The improvement in wettability of the membrane can be attributed to the hydroxyl group on the surface of the PVA layer of the membrane, 37 hence enhancing the hydrophilicity of the membrane. It can also be observed that blending of the PSF/ PES polymer enhanced the hydrophilicity of the membranes, in the case of 25% PSF/75% PES with 54.39°contact angle and 75% PSF 25% PES having a contact angle of 60.60°with reference to pure PES without coating.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

“…Similarly, PVA is shown to improve the EWC of the fabricated membranes as could be observed for 100% PSF and 100% PES coated with hydrophilic PVA, having 62.08% and 80.50%, respectively, compared to their pure PSF and pure PES without coating. The increase in the water content could be attributed to the hydroxyl group on the surface of the PVA molecule …”

Section: Resultsmentioning

confidence: 99%

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Blended Polysulfone/Polyethersulfone (PSF/PES) Membrane with Enhanced Antifouling Property for Separation of Succinate from Organic Acids from Fermentation Broth

Sadare

Daramola

2021

ACS Sustainable Chem. Eng.

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Biofouling is a serious challenge in the separation of succinic acid from fermentation broth because of its complex mixture containing substantial amount of dissociated and nondissociated forms of dissolved organics, metabolites, residual mineral salts, and bacteria. A robust blended polysulfone/polyethersulfone (PSF/PES) membrane was fabricated and presented in this study for alleviating the challenges encountered during biobased succinic acid separation. PSF/PES membranes were fabricated at varying compositions of polymers via the phase inversion technique and coated with poly(vinyl) alcohol (PVA) to enhance its antifouling properties. The synthesized membranes were characterized for surface morphology, surface functionalities, thermal stability, surface hydrophilicity, and mechanical properties by scanning electron microscopy (SEM), Fourier transform infrared (FTIR) spectroscopy, thermogravimetric analysis, contact angle measurement, and nanotensile tests, respectively. The performances of PSF/PES membranes for succinic recovery were evaluated from a synthetic fermentation broth, consisting of succinate, formate, and acetate. Influence of different process conditions such as polymer compositions, feed concentrations, and filtration pressures were investigated on the fabricated membranes. From the SEM results, the fabricated membranes showed the formation of pores with a dense outer surface. The membranes also displayed exceptional thermal stability based on the consistent FTIR and contact angle analysis. A notable higher pure water flux of 114.60 Lm–2 h–1 was observed for 100% PES/PVA and 128.40 Lm–2 h–1 pure water flux for the 75% PSF/PES-blended membrane coated with PVA. The rejection performance improved with decreasing pressure and low feed concentration. The PSF/PES-blended membrane exhibited a high succinate rejection of 99.9% from synthetic broth. It can be concluded that the PSF/PES/PVA-coated membrane has a great potential in applications for succinic acid separation from synthetic fermentation broth.

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Section: ■ Results and Discussionmentioning

confidence: 99%

Section: ■ Results and Discussionmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Blended Polysulfone/Polyethersulfone (PSF/PES) Membrane with Enhanced Antifouling Property for Separation of Succinate from Organic Acids from Fermentation Broth

Sadare

Daramola

2021

ACS Sustainable Chem. Eng.

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“…However, the tendency to absorb moisture limits its use under high moisture conditions. In this sense, several studies seek to improve its properties development blends with other polymers and additives such as citric acid, succinic acid, and tartaric acid [ 76 , 77 ].…”

Section: Nude Electrospun Nanofibersmentioning

confidence: 99%

Nude and Modified Electrospun Nanofibers, Application to Air Purification

et al. 2023

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Air transports several pollutants, including particulate matter (PM), which can produce cardiovascular and respiratory diseases. Thus, it is a challenge to control pollutant emissions before releasing them to the environment. Until now, filtration has been the most efficient processes for removing PM. Therefore, the electrospinning procedure has been applied to obtain membranes with a high filtration efficiency and low pressure drop. This review addressed the synthesis of polymers that are used for fabricating high-performance membranes by electrospinning to remove air pollutants. Then, the most influential parameters to produce electrospun membranes are indicated. The main results show that electrospun membranes are an excellent alternative to having air filters due to the versatility of the process, the capacity for controlling the fiber diameter, porosity, high filtration efficiency and low-pressure drop.

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“…PVA is an edible, lm-forming, non-toxic, environment-friendly polymer with good chemical resistance and is a synthetic biodegradable polymer and possesses excellent mechanical properties [12]. The OH groups in the matrix are highly soluble in water and can be used to act as a carrier of complex drugs [13]. PVA was synthesized using vinyl alcohol and acetate and was responsible for bioinert, biodegradable, biocompatible, and semi-crystalline nature [14].…”

Section: Introductionmentioning

confidence: 99%

Characterization and In-vitro Investigation of Tridax Procumbens Blended PVA Thin Membrane for Wound-Dressing Applications

Ayyanar¹,

Gayathri²,

Rangappa

et al. 2022

Preprint

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The tridax procumbens has been proven to show strong antimicrobial activity against staphylococcus aureus and can enhance skin infections' healing process. In this study, Tridax Procumbens (TP) liquid extracts blended Poly-vinyl alcohol (PVA) thin-film membrane was developed through a chemical process. Field emission scanning electron microscopy (FESEM) studies were carried out, which revealed the presence of clustered morphology of TP leaf extracts dispersed over the membrane. A different functional group present in the membrane was analyzed through the FTIR spectrum. The XRD analysis of PVA/TP was carried out and found a degree of crystallinity of 83% and crystal size of 5. 5 nm. DSC and TGA analyses were carried out and found the melting point and degradation of the membrane. An in-vitro wound healing study indicated that the maximum wound healing attained was 99% when liquid extracts 25 to 100 (µg/µl) of 20 wt. % of TP blended PVA membrane interacted with L929 cells for 24 hours. The in-vitro cytotoxicity examination revealed excellent cell viability on L929 cell interactions. The results suggest that the PVA/TP composite could be excellent wound-dressing material.

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Polymer nanoparticles for the release of complex molecules

Cited by 14 publications

References 106 publications

Blended Polysulfone/Polyethersulfone (PSF/PES) Membrane with Enhanced Antifouling Property for Separation of Succinate from Organic Acids from Fermentation Broth

Blended Polysulfone/Polyethersulfone (PSF/PES) Membrane with Enhanced Antifouling Property for Separation of Succinate from Organic Acids from Fermentation Broth

Nude and Modified Electrospun Nanofibers, Application to Air Purification

Characterization and In-vitro Investigation of Tridax Procumbens Blended PVA Thin Membrane for Wound-Dressing Applications

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