ACS Applied Materials & Interfaces
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2018
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IF 8.097
Xiaojing Su,Hongqiang Li,Xuejun Lai,Lin Zhang,Xiaofeng Liao,Jing Wang,Zhonghua Chen,Jie He,Xingrong Zeng
Superhydrophobic surfaces with tunable adhesion from lotus-leaf to rose-petal states have generated much attention for their potential applications in self-cleaning, anti-icing, oil–water separation, microdroplet transportation, and microfluidic devices. Herein we report a facile magnetic-field-manipulation strategy to fabricate dual-functional superhydrophobic textiles with asymmetric roll-down/pinned states on the two surfaces of the textile simultaneously. Upon exposure to a static magnetic field, fluoroalkylsilane-modified iron oxide (F-Fe3O4) nanoparticles in polydimethylsiloxane (PDMS) moved along the magnetic field to construct discrepant hierarchical structures and roughnesses on the two sides of the textile. The positive surface (closer to the magnet, or P-surface) showed a water contact angle up to 165°, and the opposite surface (or O-surface) had a water contact angle of 152.5°. The P-surface where water droplets easily slid off with a sliding angle of 7.5° appeared in the “roll-down” state as Cassie mode, while the O-surface was in the “pinned” state as Wenzel mode, where water droplets firmly adhered even at vertical (90°) and inverted (180°) angles. The surface morphology and wetting mode were adjustable by varying the ratios of F-Fe3O4 nanoparticles and PDMS. By taking advantage of the asymmetric adhesion behaviors, the as-fabricated superhydrophobic textile was successfully applied in no-loss microdroplet transportation and oil–water separation. Our method is simple and cost-effective. The fabricated textile has the characteristics of superhydrophobicity, magnetic responsiveness, excellent chemical stability, adjustable surface morphology, and controllable adhesion. Our findings conceivably stand out as a new tool to fabricate functional superhydrophobic materials with asymmetric surface properties for various potential applications.
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COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
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2024
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IF 4.9
Yongwei Cai,Yao Chen,Ruru Wang,Jianxiang Li,Hong Yang,Yuanju Li,Danni Qu
Developing a superhydrophilic/underwater oleophobic mesh membrane using an economical and eco-friendly method is still challenging to achieve high efficiency for oily wastewater separation. In this study, we proposed a novel approach to fabricate superhydrophilic/underwater oleophobic PVP/ZIF-8 coatings on stainless steel (SS) mesh using a low-cost and environmentally friendly electrodeposition method. The prepared PVP/ZIF-8@SS mesh membrane exhibited remarkable self-cleaning and anti-oil-fouling properties, along with a strong chemical robustness in extreme environments. Additionally, the mesh membrane demonstrated strong antimicrobial ability and excellent corrosion resistance property. The mesh membrane also showed promising potential in gravitational oil-water separation and oil recovery, achieving a separation efficiency of 99.0% and a water flux of 3.8 × 10 3 L·m −2 ·h −1 for rapeseed oil-water mixtures. Importantly, the PVP/ZIF-8@SS mesh membrane maintained exceptional separation efficiency, high water flux, and underwater oleophobicity properties even after undergoing 35 cycles of oil-water separations. The oil-water separation mechanism of the PVP/ZIF-8@SS mesh membrane suggested that the surface of the mesh membrane contained PVP/ZIF-8 particles with a significant negative charge. These particles preferentially interacted with positively charged water, facilitating the rapid passage of water phase through the pores, while impeding the permeation of negatively charged oil phase. This research provides an effective strategy for practical applications, including marine oil spill cleanup, oily wastewater treatment, and recycling of residual cooking oil in the restaurant industry.
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POLYMER
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2024
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IF 4.1
Xiaodong Yang,Hui Sun,Tian Gao,Yining Sun,Jing Li,Sailing Lei,Bin Yu
The removal of oil from water surfaces is crucial for protecting the environment and living organisms from the hazards posed by industrial oily wastewater and offshore oil spills. However, achieving enhanced mechanical robustness, corrosion resistance, and durability in oil-water separation membranes presents a significant challenge. In this study, poly(ethylene chlorotrifluoroethylene) (ECTFE) resin, a novel semicrystalline polymer material composed of alternating ethylene and chlorotrifluoroethylene molecules, was fabricated into melt-blown fabric (MB) by melt-blowing technology. By optimizing the side wind temperature, collector distance, roller speed, and hot air pressure, ECTFE MB with superior mechanical properties was established. Additionally, the obtained ECTFE MB exhibited excellent hydrophobicity with a water contact angle reaching 127.8°. The separation efficiency for various oil-water mixtures (oil phase including carbon tetrachloride, petroleum ether, dichloromethane, n-hexane, and isooctane) exceeded 99 %. Furthermore, after 90 cycles of oil-water separation, ECTFE MB maintained high flux (72183.16 L m −2 h −1 ) and separation efficiency of 99.40 % when carbon tetrachloride was used as oil phase. Notably, ECTFE MB demonstrated exceptional resistance to harsh environments, including strong acids, bases, and mild high temperature. The investigation of failure modes of ECTFE MB revealed that the primary failure mode of ECTFE MB was the disruption of the oil-water interface. The maximum water height that the ECTFE MB could withstand was 1376 mm. Consequently, ECTFE MB exhibit excellent mechanical properties, chemical stability, and cycling stability, indicating the potential application in the field of oil-water separation.
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JOURNAL OF POLYMER SCIENCE
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2024
·Vol. 62
·期 13
·3047-3057
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IF 3.9
Haitao Meng,Tong Xu,Chunping Li,Jie Bai
Oily water pollution has become one of the most serious water environment issue in worldwide. Membrane that can effectively and efficiently remove different oil pollutions from the complex water environment is still urgently needed. Herein, a Janus membrane with opposite wettability that can separate heavy oil–water and light oil–water mixtures on demand was prepared by using a simple sequential electrospinning and chemical crosslinking method. The membrane could remove oil or water under gravity with a high oil/water flux and excellent separation efficiency. Moreover, the membrane could separate different kinds of oil-in-water emulsions under gravity with a high flux of 1184 L m −2 h −1 and a tiny flux loss of 4.4% after a 10-cycle separation. Owing to its excellent anti-pollution properties the flux recovery rate of the membrane was still higher than 80% after 150 min of emulsion separation. Additionally, the membrane also displayed the ability to transport liquid unidirectionally, giving whom the capabilities to collect oil underwater or water underoil. This research provides a novel and simple method for producing membranes for a variety of separation applications. Graphical
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Nature Communications
·
2024
·Vol. 15
·期 1
·1-16
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IF 14.7
Zhang Ruotong,Zhang Chengzhi,Fan Xiaoxue,Au Yeung Christina C. K.,Li Huiyanchen,Lin Haisong,Shum Ho Cheung
Robotics for scientific research are evolving from grasping macro-scale solid materials to directly actuating micro-scale liquid samples. However, current liquid actuation mechanisms often restrict operable liquid types or compromise the activity of biochemical samples by introducing interfering mediums. Here, we propose a robotic liquid handling system enabled by a novel droplet actuation mechanism, termed electret-induced polarization on droplet (EPD). EPD enables all-liquid actuation in principle and experimentally exhibits generality for actuating various inorganic/organic liquids with relative permittivity ranging from 2.25 to 84.2 and volume from 500 nL to 1 mL. Moreover, EPD is capable of actuating various biochemical samples without compromising their activities, including various body fluids, living cells, and proteins. A robotic system is also coupled with the EPD mechanism to enable full automation. EPD’s high adaptability with liquid types and biochemical samples thus promotes the automation of liquid-based scientific experiments across multiple disciplines.
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Advanced Healthcare Materials
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2024
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IF 10
Huanhuan Wang,Runze Zhao,Lei Peng,Ao Yu,Yongjian Wang
Atherosclerosis is a primary contributor to cardiovascular disease. Current studies have highlighted the association between the immune system, particularly immune cells, and atherosclerosis, although treatment options and clinical trials remain scarce. Immunotherapy for cardiovascular disease is still in its infancy. Bruton's tyrosine kinase (BTK), widely expressed in various immune cells, represents a promising therapeutic target for atherosclerosis by modulating the anti-inflammatory function of immune cells. This study introduces a polydopamine-based nanocarrier system to deliver the BTK inhibitor, ibrutinib, to atherosclerotic plaques with an active targeting property via an anti-CD47 antibody. Leveraging polydopamine's pH-sensitive reversible disassembly, the system offers responsive, controlled release within the pathologic microenvironment. This allows precise and efficient ibrutinib delivery, concurrently inhibiting the activation of the NF-κB pathway in B cells and the NLRP3 inflammasome in macrophages within the plaques. This treatment also modulates both the immune cell microenvironment and inflammatory conditions in atherosclerotic lesions, thereby conveying promising therapeutic effects for atherosclerosis in vivo. This strategy also provides a novel option for atherosclerosis treatment.
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CHEMICAL ENGINEERING JOURNAL
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2024
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IF 13.3
Yunhao Pan,Tiancheng Zha,Xunming Tian,Liuqian An,Aiwen Wang,Rui Wang,Yibo Zhang,Jinxin Yao,Dongmei Liu,Shouzhu Li,Wei Wang
Flexible membranes have attracted extensive attention in water treatment due to their outstanding plasticity, portability, and toughness. However, conventional flexible membranes are usually made from non-degradable polymers or hazardous reagents, posing threats to the environment. In this work, a flexible silica nanofiber-regenerated cellulose composite membrane was fabricated by “no polymer solvents electrospinning” with cellulose regeneration. The membrane was fully degradable and eco-friendly, and it exhibited low oil adhesion force and recyclable oil emulsion separation performance. It achieved removal rates of almost 100 % and up to 0.1 % residual oil rate for six different types of oil emulsions with the addition of surfactant, which represents the optimal level reported in the literature to date. The presence of these extremely water-attracting functional groups on the surface of the membrane allows them to bond with water molecules, creating a stable water layer held together by hydrogen bonds. This layer can reject oil compounds during the separation process due to the inherent immiscibility between water and oil. Importantly, this membrane has excellent degradability. The regenerated cellulose layer on its surface can undergo complete microbial degradation (activated sludge) within 7 days, while the remaining substrate can be degraded continuously in concentrated hydrochloric acid, thereby facilitating complete environmentally benign disposal and providing a new strategy for developing green flexible membranes, which holds promise for addressing water scarcity and water pollution issues.
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JOURNAL OF APPLIED POLYMER SCIENCE
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2024
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IF 2.7
Xiuhong Li,Shuailong Zhang,Jiangzhou Li,Xinyu Hu,Jinjiao Zhang,Qiong Wei,Chupeng Zhang,Daode Zhang,Yong Liu
Various electrospun fibrous membranes have been addressed for oil/water separation owing to their advantages of high specific surface ratio, lightweight, and high porosity. However, they are commonly obtained by solution electrospinning of non-green raw materials, which could cause serious environmental issues. To realize effective oil/water separation, the optimal processing parameters for melt electrospun polylactic acid (PLA) were determined through orthogonal experiments. Subsequently, PLA fibrous films with cellulose nanofiber (CNF) or sodium chloride (NaCl) for oil/water separation were produced via melt electrospinning. The effects of incorporating CNF or NaCl on the physiochemical properties of melt electrospun PLA fibrous membranes were investigated. In contrast to the pure PLA membranes, the obtained PLA/CNF and PLA/NaCl composite membranes exhibit a finer average fiber diameter and an increased porosity. Also, the oil absorption characteristics and oil/water separation abilities of these fibrous membranes were experimentally studied. In contrast to the 84.55% oil/water separation efficiency of melt-electrospun PLA fibrous membranes, PLA/CNF exhibits the highest oil/water separation efficiency at 93.54%, whereas PLA/NaCl achieves a maximum efficiency of 90.29%. These findings show the applicability of the eco-friendly PLA-based melt electrospun fibrous membrane in the treatment of oily wastewater.
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COLLOIDS AND SURFACES B-BIOINTERFACES
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2024
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IF 5.4
Zizhao Chen,Pingping Feng,Ruqi Wang,Dongmin Chen,Chunmei Feng,Qishu Jin,Chen Yang,Botao Song
The use of dressings in clinical settings is common for the purpose of wound wrapping and creating an optimal microenvironment to enhance the healing process. Proper coverage of wounds with dressings serves as the fundamental basis for effective wound healing. Unfortunately, non-standard coverage by hands can cause pain and secondary damage to patients, while slow manual application during treatment of extensive burns may increase the risk of wound infection. Herein, drawing inspiration from the microstructure and hygroscopic deformation observed in pine cones, we propose a polyvinyl alcohol/polysulfone (PVA/PSF) smart dressing. This bioinspired smart dressing exhibits rapid bending deformation under high moisture condition, allowing easy adjustment of bending amplitude, speed, and direction. Moreover, the smart dressing is capable of rapid bending and autonomous wrapping around “artificial wounds” on a doll’s body, as well as fitting irregularly shaped “hand wounds” and extensive “arm wounds” on human subjects. By integrating two layers into one dressing design, we endow it with dual functionality: The hygroscopic PVA layer facilitates transversal liquid transport to effectively reduce exudate accumulation in the wound bed while maintaining proper moisture levels; meanwhile, the highly hydrophobic PSF layer repels various aqueous solutions to protect against external contaminants. In vivo results confirm that this multifunctional smart dressing promotes collagen synthesis and accelerates angiogenesis for accelerated wound healing. We believe that this innovative multifunctional approach to wound management will provide valuable insights into wound healing therapy.
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Small
·
2025
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IF 12.1
Qiao Chen,Xu Yang,Yao Yu,Xinmei Duan,Rongrong Ni,Guojing Song,Li Zhu,Yuan Zhong,Kai Qu,Xian Qin,Kun Zhang,Yang Luo,Wei Wu
Theranostic applications in atherosclerosis plaque microenvironment-triggered nanoplatforms are significantly compromised by the complex synthesis procedure, non-specific distribution, and limited therapeutic function. Therefore, development of a facile and feasible method to construct a pathology-based stimuli-responsive nanoplatform with satisfactory theranostic performance remains a demanding and highly anticipated goal. Herein, a novel class of multifunctional supra-carbon dots (CDs), denoted as MM@Ce-CDs NPs, by a simple nanoassembly and a subsequent coating with macrophage membrane (MM), is developed for the targeted reactive oxygen species-trigged theranostic and positive regulation of the pathological plaque microenvironment in AS. The harvested MM@Ce-CDs NPs exhibit activatable fluorescence properties, photoacoustic characteristics, and cascade enzyme performances, which can be effectively activated under ROS stimulation in the plaque pathological microenvironment, enabling precise control over theranostic functions, while markedly enhancing diagnostic accuracy and therapeutic efficacy for AS management. Besides, MM@Ce-CDs NPs can effectively manipulate the plaque microenvironment by reducing ROS levels and inflammation, alleviating M1 macrophage infiltration, and inhibiting foam cell formation, all together suppressing the pathological plaque development through the synergistic mechanisms. In addition, MM@Ce-CDs NPs inherit the biomimetic biological functions from MM, facilitating a highly specific target delivery to AS.
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INTERNATIONAL JOURNAL OF PHARMACEUTICS
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2025
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IF 5.2
Yao Chen,Dongmei Pan,Qinglan Zhu,Meiting Lu,Ying Zhang,Ziting Gao,Lu Zhang,Yankui Yi,Li Liu,Qiang Liu,Shasha Li,Chunyan Shen,Qingfa Tang,Cuiping Jiang
Atherosclerosis, a major cause of cardiovascular diseases, involves complex pathophysiological processes. The co-delivery of multiple bioactive components derived from phytomedicine to atherosclerotic plaque is challenging, especially for those with varied solubilities. This study introduces a novel metal-phenolic network-based core–shell recombinant high-density lipoprotein nanocarrier (SSPH-MPN@rHDL) for co-delivering multiple bioactive components from Salvia miltiorrhiza and Carthamus tinctorius , including salvianic acid A (SAA), salvianolic acid B (SAB), protocatechuic aldehyde (PCA), hydroxysafflor yellow A (HSYA), and tanshinone IIA (TS-IIA). These components have varied solubilities, presenting challenges for achieving synergistic therapeutic effects. The SSPH-MPN@rHDL system encapsulates the four hydrophilic components (i.e. SAA, SAB, PCA, HSYA) within a quaternary metal-phenolic network and a hydrophobic component (i.e. TS-IIA) in an outer lipid layer, facilitating targeted plaque delivery. In vitro and in vivo experimental results demonstrated that SSPH-MPN@rHDL enhanced anti-atherosclerotic efficacy through combined antioxidant, anti-inflammatory, and lipid-lowering actions. This approach offers new perspectives on using nanotechnology to optimize the delivery of phytomedicinal compounds for cardiovascular therapy.
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Food & Function
·
2024
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IF 5.1
Lianghua Xie,Xin Hao,Jiahong Xie,Jianling Mo,Changzheng Yuan,Wei Chen
Nonalcoholic fatty liver disease (NAFLD) is a worldwide public health issue, but a widely accepted therapy is still lacking until now. Anthocyanins are natural flavonoid compounds that possess various bioactivities, but their applications are limited due to their low bioavailability and stability. Acylated anthocyanins are reported to show higher stability, whereas their effects on NAFLD are still unclear. Herein, pelargonidin-3-O-(6′′-acetyl)-glucoside (Ace Pg3G) was found to dose-dependently reduce intracellular lipid droplets and triglycerides, and improve cellular oxidative stress that accompanied lipid deposition. Besides, Ace Pg3G was proved to activate AMPK phosphorylation, thus stimulating AMPK-mediated lysosome-autophagy pathway to eliminate overloaded lipid. Further study unveiled that Ace Pg3G regulated genes related to lipid metabolism downstream of AMPK to inhibit lipid synthesis and accelerate lipid oxidation. Overall, this study provided the first evidence, to our best knowledge, that Ace Pg3G ameliorated free fatty acid-induced lipid deposition in hepatocytes through regulating AMPK-mediated autophagy pathways and redox state.
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