Surface hydrophilization of highly porous poly(ether imide) microparticles by covalent attachment of poly(vinyl pyrrolidone)

Kratz, Karl; Heuchel, Matthias; Weigel, Thomas; Lendlein, Andreas

doi:10.1016/j.polymer.2020.123045

Cited by 5 publications

(3 citation statements)

References 46 publications

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“…The reason why the hydrophobic nature of polyesters does not impede their utilization as scaffolds is that there are many, readily available techniques that can alter the surface characteristics of polyesters. The list of examples includes plasma treatment, UV irradiation, coating, or blending with other polymers [26][27][28]. Each method can be used for the hydrophilization of the surface of the macromolecular matrix, which paves the way before the application of polyesters as scaffolds.…”

Section: Introductionmentioning

confidence: 99%

Preparation of Highly Porous Scaffolds with Controllable Pore Size from Microbial Polyesters

Polyák,

Tóth,

Tátraaljai

2023

Period. Polytech. Chem. Eng.

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Microbial polyesters saw limited use in the field of tissue engineering, even though the biocompatibility of these polymers makes them ideal candidates for this role. The primary factor that hinders the proliferation of microbial polyesters in this market is that their processing with conventional techniques, such as electrospinning or 3D printing, is challenging. However, the full potential of these biopolymers could still be utilized by applying unconventional manufacturing methods, such as those based on the concept of salt leaching. An implementation of this concept facilitates the production of scaffolds that simultaneously have high porosity and excellent permeability. Moreover, the average pore size can also be varied in the range from 50 to 400 µm, which was reported to be optimal for the cultivation of eucaryotic cell cultures. By adjusting the pore size, the scaffold can be tailored to the eucaryotic cells the tissue consists of. Furthermore, we have developed an entirely new computational method for the approximation of the pore size distribution of the scaffolds. The method relies on 3D data reconstructed by the software of a digital optical microscope and also facilitates the modeling of the average pore size of scaffolds. Thus, besides the control of the pore size, our method enables its prediction as well.

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Section: Introductionmentioning

confidence: 99%

Preparation of Highly Porous Scaffolds with Controllable Pore Size from Microbial Polyesters

Polyák,

Tóth,

Tátraaljai

2023

Period. Polytech. Chem. Eng.

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“…One solution to tackle this problem is to replace them by low molar mass PVP (i.e., oligomers). Chain transfer agents, such as hydrogen peroxide or mercaptoethanol, can be used to control their molar mass during radical polymerization. − For instance, Kratz et al synthesized amino-terminated PVP oligomers ( M n = 5400 g/mol) by using cysteamine as a chain-transfer agent . Other methods can be used to obtain low molar mass PVP such as fractionation techniques used by Ranucci et al for oligomeric drug carrier application or ultrafiltration techniques reported by Baldoli et al , Nonetheless, these methods limit the range of end-groups accessible and give no access to well-defined PVP with low molar mass dispersity.…”

Section: Introductionmentioning

confidence: 99%

“…11−16 For instance, Kratz et al synthesized amino-terminated PVP oligomers (M n = 5400 g/mol) by using cysteamine as a chain-transfer agent. 17 Other methods can be used to obtain low molar mass PVP such as fractionation techniques used by Ranucci et al for oligomeric drug carrier application or ultrafiltration techniques reported by Baldoli et al 18,19 Nonetheless, these methods limit the range of endgroups accessible and give no access to well-defined PVP with low molar mass dispersity.…”

Section: ■ Introductionmentioning

confidence: 99%

Trithiocarbonate-Mediated RAFT Polymerization Enables the Synthesis of Homotelechelic N-Vinylpyrrolidone Oligomers with Surfactant Properties

Gapin

Wurm

2022

ACS Appl. Polym. Mater.

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Poly(N-vinylpyrrolidone) (PVP) is a well-known biocompatible polymer widely used in cosmetics, pharmaceuticals, and many other applications and is usually synthesized via radical polymerization. High molar mass PVP lacks biodegradability according to the OECD 301 F standard and can lead to permanent accumulation within the body or in the environment. Nowadays, lower molar mass PVP is produced via xanthate-mediated reversible addition− fragmentation chain-transfer (RAFT) polymerization. However, this type of polymerization also leads to a large amount of undesired dimer formation. Herein, various homotelechelic PVP oligomers were prepared via a trithiocarbonate-mediated RAFT polymerization with the production of a minimal amount of unsaturated dimer. These PVP oligomers showed similar surfactant properties as the well-known Lutensol AT50 surfactant, and they were used as a nonionic surfactant in a typical radical aqueous miniemulsion polymerization of methyl methacrylate (MMA) to produce well-defined PMMA nanoparticles. Additionally, PVP oligomers showed no toxicity to the bacterial strain Escherichia coli and to the water fleas Daphnia pulex, which is promising for safe release in wastewater systems.

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Biodegradable Mechanically Robust PCL/Oligomeric PCL‐Diol/Laponite Antifouling Porous Membrane as a Versatile Adsorbent of Water Contaminants: A Sustainable Approach to Membrane Disposal

Upreti,

Patro

2024

J of Applied Polymer Sci

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Biodegradable polymeric membranes can reduce the environmental impact of polymer waste from discarded membranes used in water treatment and desalination. Poly(ε‐caprolactone) (PCL), a promising biodegradable material, faces limitations due to its hydrophobicity, affecting salt and contaminant adsorption. To overcome this, PCL was blended with oligomeric PCL‐diol (PCL‐D) in ratios of 90:10, 80:20, and 70:30. Additionally, 12 wt% laponite (Lap), an anionic synthetic clay, was incorporated to enhance mechanical strength and functionality. The addition of PCL‐D improved porosity, hydrophilicity, and antifouling properties, while Lap enhanced mechanical strength and performance. The pure water flux (PWF) increased from ~188 Lm−2 h−1 for neat PCL to 1124 Lm−2 h−1 for the 70:30 PCL blend with 12 wt% Lap (P7D3‐L12), and the water contact angle (WCA) decreased from ~96° to ~49°. The P7D3‐L12 membrane exhibited excellent adsorption of heavy metals (Pb2+ ~84.9 and Cd2+ ~90.6 mg/g) and dyes (MB ~45 and NR ~57 mg/g). It also showed ~36%–40% salt retention after multiple cycles and a fouling recovery rate (FRR) of ~82% after five cycles. Additionally, P7D3‐L12 demonstrated 78% weight loss in compost over 54 days, indicating enhanced biodegradability. These modified membranes offer a promising solution for sustainable water treatment.

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Surface hydrophilization of highly porous poly(ether imide) microparticles by covalent attachment of poly(vinyl pyrrolidone)

Cited by 5 publications

References 46 publications

Preparation of Highly Porous Scaffolds with Controllable Pore Size from Microbial Polyesters

Preparation of Highly Porous Scaffolds with Controllable Pore Size from Microbial Polyesters

Trithiocarbonate-Mediated RAFT Polymerization Enables the Synthesis of Homotelechelic N-Vinylpyrrolidone Oligomers with Surfactant Properties

Biodegradable Mechanically Robust PCL/Oligomeric PCL‐Diol/Laponite Antifouling Porous Membrane as a Versatile Adsorbent of Water Contaminants: A Sustainable Approach to Membrane Disposal

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