POLYMER
·
2026
·
IF 5.1
Silu Wang,Yinan Zeng,Ammara Aslam,Haofei Yang,Yu Wang,Runsha Zhai,Yangyang Hu,Jianhua Zhang
The fast sol-gel transition of ABA triblock copolymers in aqueous solution has demonstrated excellent promise for various applications. However, the occurrence of gelation behaviors often needs precise temperature control or concentration regulation. Considering the advantages of precisely spatiotemporal control and noninvasive manner, the photo-controlled gelation behaviors are desirable but still remain a significant challenge, especially for ABA triblock copolymers. Herein, we reported a facile strategy for spatiotemporal photo-modulation of reversible gelation of ABA triblock copolymers. The pH-responsive ABA triblock copolymers [poly( N,N - diethylaminoethyl methacrylate)- b -polyethylene glycol- b -poly( N,N -diethylaminoethyl methacrylate), PDEAEMA-PEG-PDEAEMA] were synthesized and used for preparing photobase generator (Malachite green carbinol base, MGOH)-containing micellar solution. Under ultraviolet irradiation, the MGOH in PDEAEMA-PEG-PDEAEMA micelles could rapidly generate OH − , resulting in deprotonation and hydrophobization of PDEAEMA chain, finally achieving micellar reconstruction and in situ gelation transition. This study demonstrated not only a photo-controlled reversible sol-gel transition of ABA triblock copolymers without the limitations associated with conventional photosensitive reagents, but also a low-cost and fast system for intelligent monitoring, early warning, and rapid shielding of ultraviolet rays. Considering the easily available agents, simple preparation process and high flexibility in tuning hydrogel properties, this strategy opens up a promising avenue to develop photo-controlled hydrogels for various applications without involving complex synthesis of photosensitive polymers.
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高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2026
·
IF 5.4
Xinru Ding,Jiaxue Chen,Renyan Zhang,Ling Huang,Hui Xu
Liquid-liquid interfacial co-assembly yields uniform and large-area nanofilms. • Urchin-like GNPs provide tip-enhanced hotspots for superior SERS sensitivity. • CNT-g-P4VP hybrid offers robust mechanical support and molecular enrichment capability. • The nanofilm achieves 10⁻¹ ² M detection limit with excellent signal reproducibility. • The nanofilm enables sensitive, quantitative detection of diverse antibiotics. The sensitive and reliable detection of antibiotic residues is important for food safety, environmental monitoring, and public health. In this work, a robust surface-enhanced Raman scattering (SERS) platform was developed through the liqud-liquid interfacial co-assembly of poly(4-vinylpyridine)-grafted carbon nanotubes (CNT- g -P4VP) and sea urchin-like gold nanoparticles (SUGNPs). Unlike previously reported antibiotic-oriented SERS systems that mainly emphasize either ultralow detection limits, matrix-specific analysis, or mechanical reinforcement, the present design integrates morphology-amplified plasmonic hotspots with a transferable and mechanically reinforced nanofilm in a single assembly process. The key advance is that tip-rich SUGNPs are incorporated into the CNT- g -P4VP scaffold without sacrificing film continuity, thereby producing substantially stronger SERS signals than an identically assembled spherical-AuNP control. The sharp SUGNP tips and interparticle junctions provide intense electromagnetic enhancement, while the CNT- g -P4VP network anchors the particles, maintains film integrity, and may assist analyte association near the plasmonic regions. Using 4-mercaptobenzoic acid as a probe, the substrate achieved a detection limit of 10 −12 M and a relative standard deviation of 4.3%. Clearly identifiable SERS signals were retained after 100 bending cycles and after 3 months of ambient storage. Sulfacetamide and cephalexin were detected down to 10 −8 M with RSD values of 5.72% and 7.97%, respectively, and their molecular fingerprints remained recognizable in pretreated lake water. Thus, this work advances the field by demonstrating a morphology-engineered, transferable SERS film that balances sensitivity, reproducibility, mechanical durability, and matrix applicability rather than improving only a single analytical metric. Download: Download high-res image (246KB) Download: Download full-size image
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PROGRESS IN ORGANIC COATINGS
·
2026
·
IF 7.9
Shaochen Wang,Jie Xu,Guoming Xue,Jie Zhao,Ling Li,Zhengran Yi,Guangxin Gu
Waterborne resins are widely recognized as eco-friendly alternatives to solvent-based systems. However, in many cases, their practical applications may still be hindered by insufficient adhesion to low-surface-energy substrates, poor water resistance, and inadequate corrosion protection. Furthermore, conventional silane coupling agents are typically oil-soluble and exhibit poor compatibility with some water-based resins, restricting their utility in such systems. To address these limitations, we developed a novel amphiphilic block -copolymer silane coupling agent (MPEG n -b-PBA m -APTES) for high-performance waterborne acrylic-polyurethane (APU) coatings. A well-designed amphiphilic block structure ensures uniform dispersion and compatibility within the aqueous matrix. Meanwhile, reactive silane groups form a robust Si–O–Si crosslinked network, significantly enhancing interfacial bonding with the substrate. By systematically optimizing the ratio of hydrophilic to hydrophobic segments and the additive concentration, we achieve significant enhancements in overall coating performance. Among all modified coating formulations, the APU11/22–10 sample demonstrated the optimal barrier performance, achieving a water absorption rate of only 4.7%. This value was 43.3% lower than that of the APU22/11–10 sample (8.3%) and represented a 42.0% reduction relative to the blank APU-0 coating (8.1%). Meanwhile, the APU22/11–10 system achieved a peak pull-off adhesion strength of 5.33 MPa, outperforming the blank sample (2.64 MPa) by 86.4% and substantially surpassing the values obtained for APU11/22–10 (4.16 MPa) and APU45/22–10 (3.21 MPa) in terms of interfacial bonding capacity. Furthermore, the modified coatings display enhanced mechanical hardness and thermal stability. Consequently, this amphiphilic silane modification strategy enables simultaneous improvements in adhesion, water resistance, corrosion protection, hardness, and thermal stability, presenting a highly effective approach for developing high-performance and eco-friendly waterborne coatings.
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CHEMICAL ENGINEERING SCIENCE
·
2026
·
IF 5.1
Hongji Li,Mingqian Sun,Fariza Hanim Suhailin,Dan Zhang,Tingting Sun,Zimo Yuan,Dandan Wang,Wei Sun,Changming Li
This work presents a novel flexible imprinted membrane-made surface-enhanced Raman scattering (SERS) for selective detection of microcystins-LR (MC-LR) in water. Silver nanocubes decorated with titanium dioxide (Ag NCs@TiO 2 ) nanoparticles (NPs) are dispersed on a flexible polydimethylsiloxane (PDMS) membrane as the SERS substrate. The PDMS exhibits excellent optical properties, ensuring the detection accuracy. A photo-initiated polymerization process is employed to maintain the molecular integrity of MC-LR while improving the resistance of the SERS substrates to air-induced oxidation. By optimizing the reaction condition, optimal SERS imprinted membrane is applied to selective detection of practical samples. The characterization results indicate that the Ag NCs@TiO 2 molecular imprinted membranes (ATP-MIMs) present accurate detection property to the MC-LR molecules from complex solution. Rapid detection within around 1 min is achieved by the as-prepared flexible molecularly imprinted SERS sensor. The limit of detection of MC-LR is 0.0313 μg·L −1 and the ATP-MIMs exhibit a high stability of more than 86.6 % after 28 days. It clearly exhibits from results that ATP-MIMs hold significant potential applications to trace MC-LR detection and provide a novel approach to the water quality monitoring.
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EUROPEAN POLYMER JOURNAL
·
2026
·
IF 6.8
Rui Zhang,Lanjing Ma,Yahong Li,Xiaohui He,Yuhui Liu,Yu Yang,Jianxian Zeng,Mingming Zhang,Hao Zhang,Guangqiang Ma,Pengrui Zhang,Jie Shen
To address the persistent challenges in membrane-based protein separation, including membrane fouling and the permeability–selectivity trade-off, we developed mixed matrix membranes (MMMs) by incorporating positively charged polymer-grafted nanoparticles into the PVDF membrane matrix. The incorporated nanoparticles regulated the membrane microstructure and interfacial physicochemical properties, thereby enhancing water permeation and protein separation performance. Compared with the pristine PVDF membrane, the optimized MMM containing 0.25 wt% polymer-grafted nanoparticles exhibited an increase in BSA permeate flux from 8.2 to 15.3 L m -2 h −1 , corresponding to an 86 % relative increase, together with a 17 % relative improvement in BSA rejection. This simultaneous enhancement was mainly attributed to the combined effects of enlarged effective pore size, improved hydrophilicity, and regulated electrostatic interactions. The modified membrane also showed improved antifouling performance, as evidenced by the increase in flux recovery ratio from 76.1 % to 89.4 % and the decrease in irreversible fouling ratio from 23.9 % to 10.6 %. Static adsorption tests showed that the BSA adsorption capacity decreased from 18.75 to 4.38 μg cm −2 after nanoparticle incorporation, confirming that the positively charged nanoparticles did not promote irreversible protein adsorption. These improvements were mainly associated with the formation of an interfacial hydration layer and the regulation of the pore structure. Notably, the optimized MMM maintained stable permeability and rejection after five cycles of alternating BSA filtration and water cleaning, demonstrating favorable cyclic stability. These results demonstrate that positively charged polymer-grafted nanoparticles can serve as effective interfacial modifiers for regulating membrane structure, hydration behavior, and protein fouling pathways, providing a potentially useful strategy for developing antifouling MMMs for protein-separation applications.
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ACS Applied Polymer Materials
·
2026
·Vol. 8
·期 15
·13299-13310
·
IF 5.2
Xue Rong-Chao,Li Xuening,Amjad Naeema,Ding Jing-Wen,Wang Chong,Lin Ze-Zhong
Enhancing the antibiofouling performance of polyvinyl
chloride
(PVC) is essential to improve its reliability and long-term service
capability in versatile biomedical scenarios. Polymer blending has
been recognized as a facile and efficient modification strategy to
endow PVC with desirable antibiofouling properties. Nevertheless,
most current studies concentrate merely on single-functional polymer
modifiers while neglecting the synergistic effects originating from
precisely regulated polymer topological structures. In this study,
a series of amphiphilic n PCL- b - n PEGMA copolymers with identical chemical compositions but
differentiated topological architectures were successfully synthesized.
The hydrophobic polycaprolactone (PCL) blocks offer superior compatibility
with the PVC matrix, whereas the hydrophilic poly(ethylene glycol
methacrylate) (PEGMA) segments substantially strengthen the surface
antibiofouling performance of composite films. Modified PVC blended
films were fabricated, and their mechanical robustness, thermal stability,
hydrophilicity and antibiofouling behaviors were systematically evaluated.
The resultant composite films retain favorable mechanical and thermal
properties, and increasing the block numbers of PCL and PEGMA effectively
improves surface hydrophilicity and antibiofouling capacity. Notably,
the PVC/4PCL- b -4PEGMA composite exhibits the optimal
comprehensive performance, achieving 92.4% reduction in bovine serum
albumin adsorption, 93% reduction in platelet adhesion, and nearly
complete bacterial inhibition. Furthermore, the film maintains durable
antibiofouling stability under stretching, friction and long-term
immersion environments. This work provides a feasible and promising
approach for the rational design of high-performance antibiofouling
PVC materials toward practical biomedical applications.
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JOURNAL OF THE CHINESE CHEMICAL SOCIETY
·
2026
·
IF 2
Hongyun Chen,Zexin Ren,Can Hao,Wei Zhang
Bottlebrush copolymers exhibit enhanced conformational stability and have potential for antibacterial and antifouling materials. In this work, cationic bottlebrush copolymers composed of poly(ethylene glycol) methyl ether methacrylate (PEGMA) and quaternized 2-(dimethylamino)ethyl methacrylate (QDMAEMA) were synthesized via controllable atom transfer radical polymerization. The as-prepared bottlebrush copolymers were subsequently blended with polyethersulfone to fabricate robust membranes with combined antibacterial and antifouling properties. Compared to their linear analogues, the bottlebrush copolymer-based membranes exhibited enhanced antibacterial efficacy against Escherichia coli and Staphylococcus aureus , along with faster bactericidal kinetics. This improvement is attributed to the increased surface exposure of quaternary ammonium groups in the bottlebrush architectures, which strengthen electrostatic interactions with negatively charged bacteria. Additionally, the densely packed side-chain arrangement stabilized hydration layers, thereby suppressing protein adsorption and bacterial adhesion. Notably, the optimized bottlebrush copolymer-based membranes exhibited excellent durability, retaining over 99% antibacterial activity after five cycles. Hemolysis and cytotoxicity assays confirmed that the bottlebrush copolymer-based membranes were biocompatible with mammalian cells. Our results highlight a topology-based strategy for fabricating functional materials with synergistic antibacterial and antifouling capabilities.
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2026
·
IF 9.1
Xuan Zhang,Bo Wang,Zhi Hu,Shucheng Liu
Microcapsule materials with selective mass transfer and mechanical stability are considered one of the potential adsorbents in the field of natural active molecules separation. Herein, a new kind of porous boronic acid affinity imprinted covalent organic framework (COFs) microcapsules (DR-MC@PDA@MIPs) via W/O type Pickering emulsion interface polymerization were fabricated for adsorption of naringin (NRG). During the emulsion interface assembly process, the dopamine-modified COF particles (BTCA-COFs@PDA) were stabilized at the water/oil phase interface, followed by the catalytic growth of COFs shell layers via multi-phase emulsion interface. For improve the specific adsorption amounts, the dendritic initiator (Y-Shape-(Br) 2 ) were modified onto the surface of COFs based MC. Ultimately, the DR-MC@PDA@MIPs were fabricated through atom transfer radical polymerization (ATRP). The prepared DR-MC@PDA@MIPs exhibited high enrichment amounts and good NRG selectivity under neutral conditions, with a rapid adsorption equilibrium rate (120 min) and an adsorption capacity for NRG (72.32 μmol/g). Furthermore, DR-MC@PDA@MIPs showed a higher imprinting factor (3.126) compared to non-imprinted adsorbents (DR-MC@PDA@NIPs). After seven separation cycles, the obtained DR-MC@PDA@MIPs exhibited good reusability, with an adsorption capacity of 92.38% of the first adsorption-elution cycle. The DR-MC@PDA@MIPs selectively purified crude NRG products to 94.51%. Therefore, this work provides a new boronic acid affinity COFs MC imprinted MC in the specific separation of targeted flavonoid molecules, overcoming some limitations of traditional microcapsule adsorbents and advancing further research and applications in the selective separation field.
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PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
·
2026
·Vol. 123
·期 12
·e2531153123
·
IF 9.5
Keyu Chen,Yu Deng,Tianming Hu,Jichun Li,Xin-Yu Huang,Chengcheng Zhu,Honggang Chen,Meihua Chen,Limin Wu,Yonghui Deng,Wenhe Xie
Periodic porous structures with interconnected pore channels and high specific surface area are widely spread in natural world. These structures guarantee rapid mass transportation and efficient biochemical reactions within organisms, thereby satisfying the requirements of complex life activities. Inspired by the periodic porous membrane and breathing process of the mammalian respiratory system, a steady nonequilibrium chemical sensing process is established to achieve high-accuracy gas discrimination based on artificial periodic porous structures consisting of metal oxide semiconductors and pulse heating (PH) technique. Owing to its highly accessible mesopores and enormous solid–gas interfaces, periodic mesoporous tin oxide (P-mSnO2) facilitates gas diffusion during PH cycles and enhances the catalytic reaction between gas molecules and P-mSnO2. As a result, the P-mSnO2 based sensor exhibits stable and enhanced overshoot peaks in gas sensing response curves, thus achieving superior discrimination accuracy (99.8%) for six gases under the assistance of convolutional neural network (CNN). Furthermore, the mechanism underlying the distinct shapes of the gas response curves is uncovered, revealing that gas adsorption capacity, gas diffusion coefficient, catalytic reaction barrier, and transferred electron numbers are crucial factors. This work lays the foundation for the development of single-sensor artificial olfactory intelligence and the exploration of periodic porous structures in diverse frontier fields.
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ACS Applied Polymer Materials
·
2026
·
IF 5.2
Jun Zhang,Xiao-Guang Qiao,Jing Chen,Cui-Yun Liu,Chang Lu,Ge Shi,Xin-Chang Pang
Hydrogels are often limited in their applications due to their inherently weak mechanical properties. In this study, a carboxyl-functionalized hyperbranched polymer (HPEHO-star-PAA) was synthesized and used as a macromolecular physical cross-linker to enhance the mechanical properties of conductive hydrogels. Fe3+–carboxyl complexes were incorporated into the P(AAm-co-AA)/HPEHO-star-PAA hydrogel to form a dual cross-linked network structure. The cross-linker N,N′methylenebis(acrylamide) (MBA) was chemically incorporated into the network to form covalent cross-links, strengthening the network. Meanwhile, the coordination bonds formed between Fe3+ and carboxylate act as dynamic noncovalent cross-links, enhancing the energy dissipation capacity. This study successfully prepared a hydrogel with excellent mechanical properties, including an elongation at break of 573%, a tensile strength of 3.68 MPa, and a toughness of 14.09 MJ/m3. Additionlly, the conductive hydrogels also showed good antiswelling ability due to the strong binding force between Fe3+ and carboxylate. Moreover, P(AAm-co-AA) hydrogels used as strain sensors possessed stability and were highly sensitive. Therefore, this well-designed conductive hydrogel, with high mechanical strength, excellent toughness, good antiswelling ability, and high sensitivity, shows great potential for use in flexible strain sensor applications.
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SCIENCE AND TECHNOLOGY OF ADVANCED MATERIALS
·
2026
·
IF 6.6
Wei Ma,Hongyan Yang,Xinyue Ma,Jiao Huang,Li Chen,Atsushi Takahara
The development of polymer prodrugs with well-defined architectures capable of forming stable nanomicelles is important for achieving precise and efficient drug delivery. Compared with conventional linear systems, star-shaped copolymer prodrugs offer enhanced micellar stability owing to their covalently tethered architecture. However, many existing synthetic approaches rely on transition-metal catalyzed polymerization and customized monomers, which limit their sustainability and practical applicability. Herein, we report a pH-responsive doxorubicin (DOX)-conjugated benzaldehyde-functionalized star-shaped copolymer synthesized via an environmentally benign metal-free atom transfer radical polymerization (ATRP) strategy. A hydroxyl-functionalized star-shaped copolymer scaffold was first prepared from readily available monomers and subsequently modified to introduce pendant benzaldehyde groups, enabling DOX conjugation through acid-labile imine linkages. This approach affords well-controlled polymer architectures while avoiding transition-metal residues and the need for pre-functionalized monomers. The resulting DOX-conjugated star-shaped copolymers form unimolecular micelles with high colloidal stability and exhibit pH-triggered drug release under acidic conditions. In vitro studies further demonstrate effective cellular internalization and a moderated cytotoxic profile toward human large-cell lung carcinoma (H460) cells, supporting the functional viability of this micellar system as a polymer prodrug delivery platform.
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PubMed
高影响因子
CHINESE JOURNAL OF CHEMICAL ENGINEERING
·
2026
·
IF 3.5
Minghong Feng,Teng He,Haiqian Zhao,Tao Chen,Wenjing Lin,Chufen Yang
To address the challenges of poor stability and weak targeting capability in polymeric micelles, which negatively impact controlled drug release performance, pH-responsive polymers PCL-PDEAEMA-PHEMA-PPEGMA (P1, P2, and P3) with distinct block lengths were designed and synthesized in this work. These copolymers were rigorously characterized using 1 H NMR, FT-IR, and GPC. Subsequently, polymer P3 was selected for modification based on comparative analyses of critical micelle concentrations (CMC) and drug-loading performance. Polymer P3 underwent esterification with lipoic acid (LA) and folic acid (FA) to yield LA-P3 and FA-P3, respectively. These derivatives were blended at a mass ratio of 1:1 (LA-P3:FA-P3), and dithiothreitol was employed to initiate self-crosslinking, resulting in the preparation of actively targeted crosslinked mixed micelles (C-MIX). The results revealed that C-MIX@PTX drug-loaded micelles prepared at a feeding ratio of 15 mg PTX/30 mg polymer exhibited a smaller size (134.7 nm) compared to non-crosslinked micelles, with a drug-loading content of 15.31 ± 1.79% and an encapsulation efficiency of 38.42 ± 5.22%. In vitro release studies demonstrated that under neutral conditions, C-MIX@PTX achieved a cumulative drug release of 16.8% at 120 h, significantly lower than non-crosslinked micelles. Under acidic/reductive conditions, C-MIX@PTX showed a cumulative drug release of 77.1% at 120 h, slightly lower compared to non-crosslinked micelles. Cytotoxicity assays confirmed that both MIX and C-MIX were biocompatible low-toxicity carrier materials, while LA-P3@PTX, FA-P3@PTX, MIX@PTX, and C-MIX@PTX exhibited inhibitory effects on HepG2 cells, FA-P3@PTX with folate-modified demonstrated enhanced efficacy.
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