International Journal of Biological Macromolecules, Journal Year: 2023, Volume and Issue: 258, P. 128984 - 128984
Published: Dec. 25, 2023
Language: Английский
International Journal of Biological Macromolecules, Journal Year: 2024, Volume and Issue: 260, P. 129461 - 129461
Published: Jan. 21, 2024
Language: Английский
Citations
4
Chemistry of Materials, Journal Year: 2025, Volume and Issue: unknown
Published: Jan. 15, 2025
The phase structures of hydrogen-bonded benzene-1,3,5-tricarboxamide (BTA) derivatives in divinylbenzene (DVB) solutions were examined together with the template effects these during photopolymerization to make nanoporous polymers. BTA linear or branched alkyl chains found form supramolecular chains, solid crystalline nanofibers, mesophase aggregates DVB. These self-assembled caused DVB/BTA molecular composites adopt viscous liquid, nematic columnar liquid crystal, physical gel states. DVB homogeneous mixtures containing resulted macro-phase separation photo-cross-linked and derivatives. In contrast, nanofiber dispersed functioned as templates produce polymers after removal A mesomorphic mixture exhibiting a structural transition from crystal heterogeneous state enabled preparation uniaxially aligned Horizontally- vertically films synthesized through shear-induced electric-field-induced alignment phase. use additives provides potential approach controlling nanostructures improving optical electrical properties functionalities conventional polymeric materials composites.
Language: Английский
Citations
0
Journal of environmental chemical engineering, Journal Year: 2025, Volume and Issue: unknown, P. 115801 - 115801
Published: Feb. 1, 2025
Language: Английский
Citations
0
ACS Omega, Journal Year: 2025, Volume and Issue: unknown
Published: Feb. 20, 2025
Traditional poly(ether sulfone) (PES) filters, widely used for sterile, viral, and ultrafiltration, often exhibit restrictions in their selectivity-permeability profile due to heterogeneous pore size distribution. This limitation has sparked interest developing novel isoporous membrane materials fabrication techniques. Among promising candidates, block copolymer (BCP) membranes produced via self-assembly nonsolvent-induced phase separation (SNIPS) offer significant advantages, including tunable size, narrow distribution, high porosity, enhanced mechanical flexibility. However, optimizing the structure formation SNIPS remains a complex time-consuming process, making it unsuitable rapidly screening new BCP candidates. In response, this study introduces an alternative approach based on direct spin-coating of BCPs onto anodic aluminum oxide (AAO) supports. Using method, poly(styrene)-block-poly(methyl methacrylate) (PS-b-PMMA) thin film was directly cast water-filled AAO support, enabling filtration applications, significantly reducing complexity structure-application optimization. When compared commercial PES with similar molecular weight cut-offs, these PS-b-PMMA thin-film composite exhibited comparable transmission rates bovine serum albumin monoclonal antibody, while delivering ninefold improvement thyroglobulin rejection. superior cutoff precession highlights potential remove viruses antibody aggregates during downstream processing production. By burden chromatographic polishing steps, advance offers promise enhancing efficiency lowering costs biopharmaceutical manufacturing.
Language: Английский
Citations
0
Advanced Materials, Journal Year: 2024, Volume and Issue: unknown
Published: Aug. 29, 2024
Abstract The self‐assembly and nonsolvent‐induced phase separation (SNIPS) process of block copolymers solvents enables the fabrication integral‐asymmetric, isoporous membranes. An top layer is formed by evaporation‐induced (EISA) imparts selectivity for ultrafiltration functional macromolecules or water purification. This selective supported a macroporous bottom structure that (NIPS) providing mechanical stability. Thereby permeability/selectivity tradeoff optimized. SNIPS involves various physical phenomena—e.g., evaporation, self‐assembly, macrophase separation, vitrification – multiple structural, thermodynamic, kinetic, parameters. Optimizing membrane properties rationally designing processes challenge which particle simulation can significantly contribute to. Using large‐scale simulations, it observed 1) small incompatibility between matrix‐forming copolymer nonsolvent, 2) glassy arrest occurs at smaller polymer concentration, 3) higher dynamical contrast solvent results in finer, spongy substructure, whereas opposite parameter choice gives rise to larger macropores with an elongated shape. These observations are confirmed comparison experiments on polystyrene (PS)‐ ‐poly(4‐vinylpyridine) (P4VP) diblock membranes, varying chemical nature coagulant temperature coagulation bath.
Language: Английский
Citations
2
Giant, Journal Year: 2023, Volume and Issue: 17, P. 100225 - 100225
Published: Dec. 21, 2023
Because of the high viscosity severe chain entanglements, a time-consuming process aligning microstructural orientation in molecular-weight (Mw) block copolymer photonic crystal films imposed limitations on efficient mass production. In this study, effective alignment microstructures film state can be carried out within approximately few minutes. This achievement was realized through synergistic localized compatibility dry brush and shear stress during spin-casting process. The orderliness microphase-separated lamellar structure as-spun poly(styrene)-block-poly(4-vinylpyridine) (PS-b-P4VP) meticulously controlled by introducing blends with PS homopolymer (hPS) varying Mws (Mw,hPS) cholesteric liquid mesogen (Chol). Within ternary blended hPS/PS-b-P4VP(Chol), wet-brush miscibility blending low-Mw hPS small molecular weight ratio (α) Mw,hPS to Mw,bPS (Mw chain) α <1 results formation disoriented structures, whereas dry-brush localization high-Mw α∼0.9 yields highly parallel-aligned structures substrate after spin casting, even massive quantity additive (∼59 wt%). demonstrated morphological observation extraction hPS. As result, without any further efforts, such as additional solvent or thermal annealing treatments, exhibit visible structural colorations wavelengths alternating provides an accessible solution for rapidly producing flexible crystals featuring tunable band gaps.
Language: Английский
Citations
3
Giant, Journal Year: 2023, Volume and Issue: 16, P. 100207 - 100207
Published: Nov. 4, 2023
Here, we observed, via small-angle X-ray scattering and transmission electron microscopy, co-existing morphologies of lamellae cylinders by precisely tailoring the volume fraction each block in polystyrene-b-polyisoprene-b-polystyrene-b-poly(2-vinylpyridine) tetrablock terpolymer (S1IS2V). The PI are located inside PS microdomains. This is due to presence mid-block PS2 which effectively isolates from interface between P2VP lamellae. experimentally observed morphology good agreement with predicted phase self-consistent field theory. Furthermore, successfully adjusted position lamellar microdomains changing length mid-block. Finally, obtained vertically oriented S1IS2V films aid solvent annealing.
Language: Английский
Citations
2
Polimery, Journal Year: 2024, Volume and Issue: 69(1), P. 3 - 10
Published: Jan. 29, 2024
In the article, based on literature data, an attempt was made to systematize polymer porous materials in terms of pore size and technological aspects.
Language: Английский
Citations
0
Soft Matter, Journal Year: 2024, Volume and Issue: 20(34), P. 6834 - 6847
Published: Jan. 1, 2024
Ion-conducting nanoporous membranes with high ion exchange capacity and mechanical, thermal alkaline stability.
Language: Английский
Citations
0
Journal of Molecular Liquids, Journal Year: 2024, Volume and Issue: 412, P. 125834 - 125834
Published: Aug. 28, 2024
Language: Английский
Citations
0