ACS Applied Nano Materials
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2024
·
IF 5.3
Hongyan Huang,Yong Wen,Yi Huang,Fang Guo,Quanpei Xie,Chaohai Sun,Jinxin Liu,Si Cheng
Although several separation membranes for the purification of dye-containing oily wastewater have been reported, achieving continuous one-step separation and photodegradation of complex oil/water effluents containing dyes is still a significant challenge. In previous studies, the purification of oil/water mixtures has typically involved a two-step process involving the initial separation of oil/water mixtures followed by the subsequent photodegradation of organic dyes. This is because one-step purification requires the membrane to concurrently possess an excellent separation efficiency and photodegradation ability to ensure efficient degradation of dyes as they rapidly pass through the separation membrane. Herein, we propose a photothermally responsive poly(N-isopropylacrylamide)-MXene/polyacrylonitrile-poly(N-isopropylacrylamide) nanofibrous hydrogel membrane (PNIPAm-MXene/PAN-PNIPAm, PMPP membrane). The PMPP membrane is composed of a PNIPAm-MXene hydrogel bonded to the surface of a PAN-PNIPAm nanofibrous membrane. The PNIPAm-MXene hydrogel layer imparts excellent photothermally responsive wettability, photodegradation activity, and antifouling properties to the membrane. The PAN-PNIPAm nanofibrous membrane provides a porous structure that ensures the highly efficient separation of complex oil/water mixtures. The PMPP membrane achieves simultaneous one-step separation and photodegradation of complex oil/water effluents under light irradiation, particularly in the case of multiphase heavy oil/water/light oil mixtures containing both oily and water-soluble organic dyes and oil–water emulsions. The degradation and separation efficiencies of the PMPP membrane exceed 99.5%. Even after 20 cycles, the degradation rates of Sudan IV and methyl blue (MB) remain above 95.7 and 99.9%, respectively.
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Yang Zhou,Yiqi He,Simeng Qi,Sisi Zhao,Lulu Wang,Quan Xu
Thermal responsive hydrogel smart windows have attracted wide attention due to their design flexibility and excellent thermal responsive optical properties. Only relying on temperature control, sometimes the phase transition speed is not fast to meet the needs of rapid thermal response rate in practical applications. Here, a hydrogel with excellent photothermal response characteristics was prepared through combining the photothermal conversion efficiency of graphene nanoparticles and the thermal response effect of hydroxypropyl cellulose. The photothermal cooperative hydrogel (PCH) smart window has integrated high solar modulation ability (ΔT sol = 61.2 %), excellent infrared isolation ability (ΔT IR = 48.6 %) and fast response speed (within 2 min) successfully. In outdoor demonstrations, the PCH window can reduce 13.1 °C compared to the ordinary window, showing promising energy-saving performance in summer daytime. Simulations suggested that PCH window can cut off 13.1 % heating, ventilation, and air-conditioning (HVAC) energy consumption compared with the Low-E window in Singapore. The PCH window can dynamically adjust solar radiation through light and heat, which provides a new strategy for intelligently reducing the energy consumption of buildings.
研究领域:
材料科学
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能源工程
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产品关联
DOI
高影响因子
Materials
·
2021
·Vol. 15
·期 1
·2
·
IF 3.623
Chuan Yan,Liqin Yang,Xiangquan Mo,Keying Chen,Weiya Niu,Zhiju Zhao,Guanghua Li
Amphiphilic random copolymer poly(methacrylamido-azobenzene)-ran-poly(2-hydroxyethylacrylate) (PMAAAB-ran-PHEA) was synthesized via hydrolysis of poly(methacrylamido-azobenzene)-ran-poly[2-((2′-tetrahydropyranyl)oxy)ethylacrylate] (PMAAAB-ran-P(THP-HEA)), which was prepared by conventional radical polymerization. PMAAAB-ran-PHEA micelles were then prepared via dialysis method against water with DMF as solvent. The structure, morphology, size, and low critical solution temperature (LCST) of PMAAAB-ran-PHEA and its micelles were determined by1H-NMR, GPC, TEM, and DLS. The thermo- and photo-responsive behaviors of the resulting polymer micelles were investigated with Nile red as a fluorescence probe. The results showed that PMAAAB-ran-PHEA micelles were porous or bowl-shaped and its size was 135–150 nm, and its LCST was 55 °C whenFMAAABof the random copolymer was 0.5351; the hydrophobicity of the micellar core was changed reversibly under the irradiation of UV light and visible light without release of Nile red or disruption of micelles; the size and solubilization capacity of the micelles were dependent on temperature, and Nile red would migrate for many times between the water phase and the micelles, and finally increasingly accumulated during the repeated heating and cooling processes.Keywords:methacrylamido-azobenzene;2-hydroxyethylacrylate;amphiphilic random copolymer;micelles;Nile red;photo-/thermo-responsiveness
研究领域:
高分子化学
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材料科学
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产品关联
DOI
PubMed
高影响因子
Journal of Materials Chemistry B
·
2024
·Vol. 12
·期 10
·2571-2586
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IF 6.1
Donghai Li,Mengzhu Li,Liangyu Wang,Jie Zhang,Xiaoyue Wang,Jun Nie,Guiping Ma
Management of diabetic wounds presents a global health challenge due to elevated levels of ROS in the wound microenvironment, persistent dysregulation of inflammation modulation, and limitations in commercially available dressings. Addressing this issue, we have developed a pH-responsive and glucose-sensitive multifunctional hydrogel dressing that dynamically responds to the wound microenvironment and enables on-demand drug release. The dressing incorporates a matrix material based on aminophenylboronic acid-functionalized alginate and a polyhydroxy polymer, alongside an enhancer phase consisting of self-assembled metal–phenol coordination nanospheres formed by tannic acid and iron ions. Using the dynamic borate ester bonds and catechol-metal ion coordination bonds, the dressing exhibits remarkable shape adaptability, self-healing capability, tissue adhesiveness, antioxidant activity, and photothermal responsiveness, without additional curatives or crosslinking agents. As a wound dressing, it elicits macrophage polarization towards an anti-inflammatory phenotype while maintaining long-lasting antimicrobial effects. In a diabetic mouse model of full-thickness wound infections, it effectively mitigated inflammation and vascular damage, significantly expediting the wound healing process with a commendable 97.7% wound closure rate. This work provides a new direction for developing multifunctional smart hydrogel dressings that can accelerate diabetic wound healing for human health.
研究领域:
生物材料学
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医学工程
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组织修复与再生
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产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2024
·
IF 13.3
Zhiwen Sun,Changyou Shao,Sanwei Hao,Jifei Zhang,Jiaxuan Zhu,Wenfeng Ren,Bing Wang,Jun Yang,Runcang Sun
Utilizing renewable biomass as an alternative to petroleum-based products for the development of smart materials emerges as a pivotal strategy for sustainable development. However, the straightforward, rapid, and cost-effective deployment of biomass for novel smart material synthesis remains a formidable challenge. Herein, we employ a facile solvent-free one-pot strategy to develop a multifunctional smart biomass photothermal elastomer, which synthesized from the natural small molecule of α-lipoic acid (LA) and renewable lignin biopolymer without any chemical modification. The incorporation of lignin confers to the obtained elastomers superior mechanical strength, photothermal responsiveness, photothermal self-healing, and adhesive capabilities. Notably, the photothermal elastomers can be fully recycled and reused by simple thermal remodeling. As a proof of concept, the temperature difference generator can be driven to generate electricity utilizing the excellent photothermal effect of elastomers, highlighting its excellent light-heat-electricity conversion capability. Intriguingly, the photothermal elastomers exhibit light-driven shape memory effect, enabling to grasp objects by shape-programmed four-arm soft gripper under selective irradiation. This pioneering work not only demonstrates significant progress in high-value utilization of bio-derived lignin, but also opens up a new avenue for sustainable and innovative applications in advanced energy management devices and soft actuators.
研究领域:
材料科学
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可持续化学
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智能材料
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能量转换
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软机器人
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产品关联
DOI
高影响因子
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
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2024
·
IF 8.1
Tao Shi,Huan Liu,Xiaodong Wang
We have developed a novel type of flexible multi-stimuli-responsive shape memory composite system based on a melamine/polydopamine (PDA)/Fe 3 O 4 /phosphorene (PR) complex foam and poly(ethylene glycol) (PEG). The system was constructed through coating PDA on the skeleton of the melamine foam and then decorating the PDA layer with Fe 3 O 4 and PR nanosheets, followed by vacuum impregnation of PEG. The resultant composites exhibit an intrinsic thermal-driven shape memory behavior with a high shape recovery ratio of around 100% thanks to their high latent heat capacity derived from the loaded PEG. The introduction of magnetic Fe 3 O 4 nanoparticles and PR nanosheets not only enhances the thermal conductance of the composites but also generates good magnetic and photothermal responsiveness. This enables the composites to obtain good light- and magnetic-driven shape memory capabilities in a shorter shape recovery period. This study offers a new strategy for developing smart materials with multiple and effective response to light, heat, and magnetism.
研究领域:
材料科学
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纳米技术
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智能材料
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复合材料
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DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2023
·Vol. 141
·期 3
·e54819
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IF 3
Jinheng Wang,Zhonghua Zhao,Jikui Wang,Weihong Guo
Hydrogels have been widely used for adsorbing heavy metal ions in wastewater treatment. Herein, a calcium alginate/poly-N-isopropylacrylamide double-network hydrogel with photothermal responsiveness was prepared for adsorbing heavy metal ions in aqueous solution. The chemical composition, micromorphology, swelling properties, photothermal responsiveness, adsorption properties, and adsorption mechanism of gel microspheres were studied, respectively. The gel microspheres had an interpenetrating three-dimensional porous structure, and their high porosity morphology and high specific surface area could ensure the adequate exposure of active adsorption sites. The gel microspheres showed excellent selective adsorption of Cr(III), and the theoretical maximum adsorption capacity of 146.16 mg/g was calculated according to the Langmuir model. Besides, its excellent photothermal conversion ability enhanced the resistance to external interference after the adsorption. Our work has provided an innovative approach to solar water purification while optimizing the preparation process.
研究领域:
环境科学
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材料科学
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化学工程
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产品关联
DOI
高影响因子
ACS Applied Polymer Materials
·
2022
·
IF 4.855
Wilson Finold Ibeaho,Mingqian Chen,Jiasheng Shi,Changlong Chen,Zhengyu Duan,Cui Wang,Yunfeng Xie,Zhiyong Chen
Enzymatic polymerization is widely used in the fabrication of hydrogels due to its high biocompatibility and controllability. However, it usually suffers from the destabilization of enzymes under hard conditions and the requirement of diketones substrates to fulfill radical polymerization. Herein, multifunctional magnetic hydrogels (MMHs) are constructed in the presence of hydrogen peroxide (H2O2) by iron oxide nanoparticle (Fe3O4 NP)-mediated radical polymerization. In comparison with the natural enzyme initiation systems, a Fe3O4 NPs/H2O2 system can initiate the polymerization of poly(ethylene glycol) diacrylate instantaneously at ambient temperature without the substrate and can display higher catalytic activity under acidic conditions. The resultant magnetic composites have multifunctionality of the integration of magnetism, superwetting, and photothermal responsiveness, as well as the catalytic activity of a mimic enzyme, achieving effective rapid separation of oil-in-water emulsions and fast degradation of organic dye with good recyclability.
研究领域:
材料科学
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化学工程
·
环境科学
✓ 已验证
DOI
高影响因子
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