ACS Applied Nano Materials
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2024
·
IF 5.3
Jia Deng,Shaoge Fu,Yifan Zhong,Ming Jiang,Tao Chen,Haili Zhao
Photonic crystal (PC) hydrogels with unique micro/nanostructures have excellent prospects in many fields, such as sensing, displays, anticounterfeiting, information encryption, and adaptive camouflage. Herein, magnetic core–shell Fe3O4/SiO2 nanoparticles with a controlled size were synthesized, followed by PC hydrogels of arbitrary structures that were fabricated via the magnetically inducing self-assembly of magnetic nanoparticles in the poly(ethylene glycol) diacrylate (PEGDA) pregel solution and a subsequent digital micromirror device (DMD)-based UV polymerization process. By controlling the size of nanoparticles and magnetic field intensity, various PC hydrogel patterns with tunable structural colors were fabricated. Combining magnetic field control with DMD-based light modulation, high-throughput preparation of structural color PC hydrogels was achieved. Furthermore, the Fe3O4/SiO2 nanoparticles were assembled into poly(2-hydroxyethyl methacrylate) (PHEMA) with solvent responsiveness. Interestingly, the obtained PC hydrogels could swell in ethanol, resulting in a change in the structural color. Meaningfully, a dual-component PC hydrogel consisting of a PEGDA pattern and a PHEMA background was fabricated, and the invisible pattern in the initial state could be displayed and hidden through cyclic exposure to ethanol and ethylene glycol. The presented strategy for constructing the PC hydrogels from Fe3O4/SiO2 nanoparticles could provide valuable insights for the development of intelligent structural color materials, which exhibit significant potential in applications such as information storage, visual sensing, and anticounterfeiting.
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Nature Communications
·
2025
·Vol. 16
·期 1
·1-11
·
IF 15.7
Wang Changxing,Ning Yayun,Yue Yifan,Du Guoli,Xie Yuechi,Li Jianing,Bibi Nazia,Wen Xiaoxiang,Li Jianing,Yang Sen,Lu Xuegang
Developing room-temperature phosphorescent (RTP) materials with microscale periodic structures presents a promising prospect for future optical applications but remains challenging due to the complex integration of luminescent and structural components. Herein, we present a strategy for large-scale production of RTP silica nanospheres (RTP SiO 2 NPs) with a low dispersity in size using a modified Stöber method, where organic molecules are embedded in silica networks and subsequently undergo in-situ carbonization, aggregation and crystallization to form phosphorescent carbon dots under high-temperature calcination. These NPs can self-assemble into photonic crystal (PC) structures, enabling the straightforward integration of structural color, fluorescence (FL) and RTP to achieve multimodal luminescent properties. The angle-dependent photonic bandgap (PBG) generated by the physical periodic structure modulates light propagation in RTP PC gels, creating FL and RTP angle-dependent chromatic responses. Temperature-induced refractive index changes between SiO 2 and the liquid matrix further enable dynamic control of light-scattering states, significantly altering transmittance and emission intensities of FL and RTP. This fusion of physical photonic structures with luminescence offers potential approach for constructing advanced multimodal luminescent devices.
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CHEMICAL ENGINEERING JOURNAL
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2025
·
IF 13.2
Yiwen Hong,Baichao Zang,Dahu Yao,Xiping Gao,Jing Chen,Chang Lu,Xinchang Pang
Thermal runaway in lithium-ion batteries poses severe safety risks due to fire and explosion. Here, we report a counterintuitive strategy to fabricate a hydrogel by incorporating 500 wt% nano-SiO 2 into a polyacrylamide (PAM) matrix. The resulting composite exhibits nanoconfined porous structure and outstanding mechanical, thermal, anti-freezing, and ablation resistance properties. Compared to pure PAM, the hydrogel achieves 33× higher tensile strength (1.3 MPa), 645× higher compressive strength (27.75 MPa), and 1133× higher fracture energy (2.04 MJ m −3 ). Abundant bound water and nanopores extend vaporization duration, enhancing thermal regulation and flexibility at −10 °C. Post-ablation residues with micro/nano hierarchical porosity exhibit low thermal conductivity (0.104 W m −1 K −1 ) and reduced peak heat release (54.3 kW m −2 ), effectively suppressing heat and flame propagation. Thermal runaway tests confirm the hydrogel's ability to delay propagation and provide critical escape time. This multifunctional material offers a new design avenue for advanced thermal protection in battery systems.
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FIBERS AND POLYMERS
·
2024
·Vol. 25
·期 7
·2647-2659
·
IF 2.2
Zhou Jianhua,Li Sitong,Niu Zhuanli
Combining phase change materials with textile materials is an important method to give textiles temperature regulation function. Herein, the microcapsulated phase change materials with ZnO@ZIF-8@SiO 2 -doped polymethyl methacrylate (PMMA) as hybrid shell (ZZS/PMMA MPCMs) were prepared through Pickering emulsion polymerization with n-octadecane (C18) as core and ZnO@ZIF-8@SiO 2 grafted with polyacrylic acid (MZZS) particles possessing radiation cooling performance as stabilizers. The effect of MZZS content on the morphology of phase change microcapsule, radiation cooling and temperature regulation properties of coated cotton fabrics was studied. The results indicated that when the MZZS content increased to 3.0 wt%, the prepared phase change microcapsule’s encapsulation efficiency was 50.34%, showing excellent latent heat storage and release properties. Furthermore, compared with the uncoated cotton fabric, the rising and dropping rate of the temperature of ZZS/PMMA MPCMs coated cotton fabric was much slower in different seasons, indicating excellent radiation cooling and temperature regulation performance.
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ChemistrySelect
·
2025
·Vol. 10
·期 27
·e04958
·
IF 2
Chen Minggui,Yan Liang
Graphical Nano-SiO₂ (0.02 wt%) extends gel stability to 95 days at 130 °C in seawater (versus 70 days control). SEM-confirmed H-bonding between Nano-SiO₂ silanols and AMPS groups reinforces network. Gelation activation energy (88.2 kJ/mol) derived via Arrhenius model. Nano-SiO₂-toughened polymer gels achieves 34.7 MPa/m breakthrough pressure (10 × base gel) in 1.4 Darcy cores. This study solves water shutoff gel syneresis/ degradation in high-salinity seawater (Ca 2 ⁺+Mg 2 ⁺ >1;500 mg/L) for South China Sea reservoirs. Reservoirs in the western South China Sea have entered a high-water-cut stage, exhibiting significant heterogeneity exacerbated by prolonged water flooding, necessitating urgent profile control measures to enhance oil recovery. Conventional polyacrylamide organic gels fail under the prevailing high-temperature (130 °C) and high-salinity conditions, characterized by divalent cation (Ca 2 ⁺ and Mg 2 ⁺) concentrations of 5650 mg/L. This study developed a robust gel profile control system specifically engineered for such challenging environments. Key parameters including polymer and crosslinker concentrations, gel pH, and temperature were systematically optimized to ensure stability under high temperature and salinity. The optimized formulation demonstrates exceptional stability in seawater at 130 °C, with a gelation activation energy of 88.2 kJ/mol. Incorporating nanosilica significantly enhanced the gel's thermal stability, salinity tolerance, and shear resistance. Scanning electron microscopy (SEM) revealed a strengthened network microstructure. The system exhibits favorable injectivity in 1.4 Darcy permeability cores. Nanosilica reinforcement dramatically increased the gel's breakthrough pressure gradient from 3.45 MPa/m to 34.7 MPa/m. Crucially, the addition of 0.02% nanosilica extended the polyacrylamide gel's functional stability from 70 days to 95 days. This nanosilica-reinforced system offers superior long-term stability and plugging performance, presenting a viable profile control and water-shutoff technology for offshore high-temperature, high-salinity seawater reservoirs.
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Materials Today Chemistry
·
2025
·
IF 6.7
Liuqin Zhang,Huali Li,Gege Zhang,Qiuping Li,Fa-Qian Liu
Marine biofouling can cause economic, environmental and safety issues. Here the Cu-MOF/SiO 2 aerogel@PDMS coatings were prepared to prevent the colonization of fouling organisms. The Cu-MOF-74 which can continuously provide copper ions was successfully synthesized through a simple method. SiO 2 aerogel was employed to immobilize Cu ions (Cu-MOF) by the formation of - Si - O -Cu- O -, thereby achieving the goal of more stable release of copper ions from the coating. And the improvement of coating hydrophobicity also helps to enhance the stability of MOFs. The Cu-MOF/SiO 2 aerogel@PDMS coating exhibits significant long-term antibacterial performance, with a maximum antibacterial rate of 99.5 %. And it can enhanced the long-term static anti-biofouling performance of PDMS in the local sea by effectively preventing the colonization of macrofouling organisms (e.g. barnacles, calcareous tubeworms).
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DESALINATION
·
2025
·
IF 9.8
Siwei Liang,Heng Lv,Hong Cai,Fan Ni,Yihao Hua,Fei Shen,Jing Yang,Jinsong He
Membrane separation has become more attractive for sustainable treatment and resource recovery from biogas slurry. For humic substances (HS) in biogas slurry, conventional methods such as nanofiltration or ultrafiltration face limitations in effectively separating HS from inorganic salts and recovering HS. To address this point, we developed a novel SiO₂-interlayered loose nanofiltration (iLNF) membrane for separation of HA/salt from biogas slurry for the first time. The introduction of in-situ generated SiO₂ interlayer reduced the selective layer thickness and cross-linking degree, while enhancing membrane surface hydrophilicity and electronegativity. More importantly, the optimized iLNF2 membrane exhibited a high water flux of 147.19 LMH·bar −1 , excellent HA rejection of 98.07 % and low mixed salts retention of 5.07 %. Even under elevated salt concentrations such as 30 mM, iLNF2 maintained robust HA rejection (98.17 %) and efficient mixed salts permeation (97.31 %). Additionally, it also demonstrated good long-term stability and good antifouling properties. This work provides a promising strategy for sustainable HS recovery from biogas slurry by LNF technology. Importantly, LNF as pretreatment can further reduce membrane fouling in subsequent nanofiltration (NF) or reverse osmosis (RO) processes, thereby enhancing the overall efficiency and sustainability of biogas slurry treatment.
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Molecular Catalysis
·
2025
·
IF 4.9
Zhibin Xian,Shilin Bo,Xinjun Xu,Hui Wan,Wei Du,Guofeng Guan
Hydroformylation plays a crucial role in the modern chemical industry by enabling the efficient production of aldehydes, which are essential raw materials for a wide range of chemicals. In this study, we reported a pair-site 0.2Rh-0.8WO x /SiO 2 catalyst that demonstrated exceptional performance in isobutene hydroformylation. The catalyst achieved an isovaleraldehyde yield of 89.57 % (TON=8936) after 5 h of reaction at 90 °C and 5 MPa, and retained 85.0 % of its initial yield after four cycles. This performance was significantly superior to that of the catalyst prior to the introduction of W and proved more suitable for the hydroformylation reaction of isobutene compared to previously reported Al 2 O 3 -supported pair-site catalyst. Density functional theory (DFT) calculations revealed that W served as an electronic modulator in the catalytic system. The charge transfer from Rh to W enabled W to adsorb and convert excess CO on the Rh surface, thereby creating vacant active sites for the subsequent insertion of olefin and CO, ultimately enhancing the hydroformylation performance. The pair-site catalyst developed in this study exhibited remarkable improvements in both catalytic activity and stability, offering valuable guidance for catalyst design from an interface science perspective.
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JOURNAL OF APPLIED POLYMER SCIENCE
·
2025
·
IF 2.8
Zhigang Zhan,Wei Wu,Huanbo Hu,Junjian Ye,Lu Cui,Qiuyang Yu,Changxi Chen
This study presents the synthesis of a waterborne polyurethane (WPU-A) emulsion modified with (3-(2-aminoethyl)aminopropyl)trimethoxysilane (AEAPTMS). Self-cleaning materials were developed by applying WPU-A emulsions onto thermoplastic polyurethane (TPU) components, which were shaped using selective laser sintering (SLS), through a post-treatment impregnation and curing method. Additionally, superhydrophobic nano-SiO 2 (sn-SiO 2 ) was incorporated onto the surface of the TPU/WPU-A material. The resulting TPU/WPU-A/sn-SiO 2 self-cleaning composites were created, and the self-cleaning capabilities along with other characteristics of the two TPU-coated materials were examined individually. Findings indicated that the water contact angle for pure TPU measured 123.8°, while the TPU/WPU-A0.5/sn-SiO 2 -20, treated with WPU-A emulsion, exhibited an increased angle of 153.3°, achieving superhydrophobicity. The incorporation of sn-SiO 2 particles enhanced the surface roughness of the TPU/WPU-A0.5/sn-SiO 2 -20 material, facilitating the easy removal of surface contaminants. This enhancement contributes to improved anti-pollution properties and effective self-cleaning performance of the TPU material. The compressive strength of the TPU/WPU-A0.5/sn-SiO 2 -20 skeletonized parts reached 0.733 MPa, representing a 168% increase compared to the pure TPU skeleton. The TPU/WPU-A0.5/sn-SiO 2 -20 material, which is coated with WPU-A and integrated with sn-SiO 2 , demonstrates excellent self-cleaning and mechanical properties, indicating its potential for various applications.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2025
·
IF 5.4
Chen-Xiang Wang,Dao-Xiong Chen,Tao Zhu,Xue-Fen Zhang
Superhydrophobic composite coatings, composed of hydrophobic nanoparticles and adhesive, hold great potential for protecting aluminum alloys from corrosion. However, most existing coatings consider single interfacial stability. This study developed a double-interface reinforced superhydrophobic SiO 2 composite coating on etched aluminum alloys by applying the epoxy polymer (EP) primer followed by spraying a mixture of EP, polydimethylsiloxane (PDMS), and hydrophobic SiO 2 nanoparticles. The etched substrate and the intermediate EP layer effectively resolved the issue of weak interfacial bonding between the substrate and the coating, while the simultaneous incorporation of EP and PDMS ensured robust interactions within the coating itself. The resulting coating demonstrates remarkable mechanical durability and chemical stability. Notably, the coating also displays self-healing capabilities during 19 plasma cycles and provides up to 99.99 % corrosion inhibition efficiency, along with superior self-cleaning and anti-fouling properties. This study presents a novel strategy for constructing durable superhydrophobic coatings on aluminum alloys for corrosion protection.
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Particuology
·
2024
·
IF 4.1
Wei Liu,Daoyin Liu,Zuyang Zhang,Zhenkun Sun
Fluidized bed atomic layer deposition is an efficient technique for particle coating with precise control over the film thickness and uniformity at the sub-nanoscale. In this study, a fluidized bed with a central tube is designed, where the central tube has two roles: improve fluidization and deliver precursors separately. The synthesis of core-shell structured SiO 2 /TiO 2 nanoparticle catalysts for photodegradation of tetracycline hydrochloride (TC) is carried out using TiCl 4 and H 2 O as precursors at 180 °C under atmospheric pressure. Under the combination of vibration and central tube, the segregation of agglomerate size along the bed height is weakened, and the prepared SiO 2 /TiO 2 nanoparticles show excellent photocatalytic degradation performance: the degradation efficiency on TC is 96% under 300 W xenon lamp irradiation for 60 min. The mechanism of enhanced photocatalytic activity is due to the Ti-O-Si bonds generated at the interface, which increase the ability to absorb sunlight and accelerate the separation of holes and electrons.
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INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
·
IF 7.7
Huanyang Yu,Yan Wang,Rundong Wang,Yuan Ge,Liyan Wang
The environmental pollution caused by plastic films urgently requires the development of non-toxic, biodegradable, and renewable biopolymer films. However, the poor waterproof and UV resistance properties of biopolymer films have limited their application in fruit packaging. In this work, a novel tannic acid cross-linked chitosan/gelatin film with hydrophobic silica coating (CGTS) was prepared. Relying on the adhesion of tannic acid and gelatin to silica, the coating endows CGTS film with excellent superhydrophobic properties. Especially, the contact angle reaches a maximum value 152.6°. Meanwhile, tannic acid enhanced the mechanical strength (about 36.1 %) through the forming of hydrogen bonding and the network structure. The prepared CGTS films showed almost zero transmittance to ultraviolet light and exhibited excellent radical scavenging ability (∼76.5 %, DPPH). Hence, CGTS film is suitable as a novel multifunctional packaging material for the agriculture to protect premature fruits, or the food industry used in environments exposed to ultraviolet radiation and rainwater.
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