ADVANCED FUNCTIONAL MATERIALS
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2023
·
IF 19
Menghui Liu,Yunzhi Wang,Yanlv Chen,Liujun Li,Yang Sun,Yongchao Li,Yajun Yuan,Pan Lu,Wenkai Zhang,Pengfei Pang,Xin Peng,Hong Shan
Endovascular embolization can selectively deploy embolic agents into diseased or injured blood vessels to complete the treatment. However, traditional embolic agents still face challenges, such as poor intravascular diffusivity, non-biodegradable, unstable mechanical properties, radiolucency, and recanalization. Herein, we report a poly (lipoic acid-tannic acid)/tromethamine/Galinstan (PLTTG) dimethyl sulfoxide (DMSO) solution-derived hydrogel liquid embolic agent. By injecting PLTTG DMSO solution into body fluids, a PLTTG hydrogel can be formed in situ owing to the solvent exchange induced intra- and inter-polymer hydrogen bonding and electrostatic interactions. Moreover, the gelation time and injection forces of the solution as well as the mechanical properties and embolic pressure of the obtained hydrogels can be adjusted by changing the concentration of PLTTG. The PLTTG hydrogel can effectively embolize the renal artery and femoral vein without recanalization and displacement in rabbit models. Furthermore, the hydrogel can embolize the ruptured femoral artery to arrest active bleeding. Owing to the advantages of the hydrogel, including adjustable gelation time, mechanical properties, viscosities, injection forces, and embolic pressure, as well as good biocompatibility and biodegradability, radiopacity, excellent embolization performance and intravascular diffusivity, easy usage, low cost, allowing it to be a potential embolic agent to treat multiple vascular diseases in clinic.
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高影响因子
ChemistrySelect
·
2023
·Vol. 8
·期 29
·e202300694
·
IF 2.1
Haitao Meng,Xuecong Pan,Xuemei Li,Haijun Meng,Shouzhu Li
Graphical An efficient and durable hydrophilic SiO 2 fiber membrane was designed by a template-free strategy combined with electrostatic spinning technology. The material can perform separation of oily wastewater under gravity-only conditions and has demonstrated high separation performance for effective separation of oil-water mixtures and oil-in-water (O/W) emulsions. The discharge of oily wastewater seriously affects human health and the sustainable development of the ecological environment. Therefore, developing oil-water separation materials capable of removing organic pollutants is imperative. In this study, we report the preparation of a SiO 2 nanofiber membrane based on tetraethyl orthosilicate (TEOS) using a template-free strategy combined with electrostatic spinning technology. The prepared SiO 2 nanofiber membrane was characterized using SEM, EDX, FT-IR, AFM, XRD, CA, and TG techniques. The prepared SiO 2 nanofiber membranes exhibit excellent hydrophilicity (WCA=0°) in air and oleophobicity (UWOCA=136°) underwater, with excellent anti-pollution properties for gravity-driven oil-water separation. The SiO 2 nanofiber membrane can effectively separate different kinds of oil-water mixtures with high water flux (4420 L m −2 h −1 ) and excellent separation efficiency (99.1 %), with a flux loss of 5.65 % after ten cycles, indicating excellent cycling stability. In addition, it can also be used to separate various oil-in-water emulsions stabilized by surfactants with a separation flux higher than 2079 L m −2 h −1 and a separation efficiency maintained at more than 97 %. During the separation of 150 mL lotion, the membrane was seriously scaled due to long-term pollution. Simple water washing could not restore the membrane flux, and the irreversible scaling rate was 50.74 %, which seriously affected the continuous separation. However, due to the excellent thermal stability of SiO 2 nanofiber membranes, oil contaminated membranes can be heated and regenerated, resulting in a flux recovery rate of nearly 100 %. Overall, this material has a wide range of potential applications in environmental protection, especially in the treatment of oily wastewater, due to its simple fabrication method, high flux, and superb oil resistance and recyclability.
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高影响因子
INDUSTRIAL CROPS AND PRODUCTS
·
2023
·
IF 5.9
Laiquan Lv,Shengyao Huang,Chengyue Zhou,Weiwei Ma
Chemically activated biochar, which is characterized by its high surface area, thermal stability, and chemical compatibility, exhibits great potential for loading phase change material (PCM) to enhance heat transfer and prevent leakage. However, conventional chemical activation processes typically involve highly corrosive and toxic chemical activators that pose environmental hazards. Biochar that is activated by K 2 CO 3 , which achieves high porosity while minimizing adverse environmental effects, has been applied in some fields. In this study, K 2 CO 3 was employed as a chemical activator, and five waste biomass materials were utilized as precursors to produce biochar samples for the loading of paraffin (PA), stearic acid (SA), and polyethylene glycol (PEG). The results revealed that the activated biochar derived from corncob (CC) exhibited remarkable textural characteristics, and it had a specific surface area of 1053.95 m 2 /g and a total pore volume of 0.467 cm 3 /g. Additionally, owing to its larger specific surface area and richer textural characteristics, the loading capacities of CC for PA, SA, and PEG were as high as 78.79 %, 80.83 %, and 85.19 %, respectively. Furthermore, introducing PA, SA, and PEG into CC resulted in thermal conductivity enhancements of 1.460-, 1.138-, and 1.271-fold, respectively. Lastly, incorporating biochar improved the thermal stability of the composite PCMs. This study aimed to explore the performance of the biochar activated by K 2 CO 3 in PCM loading, enhancing the environmental sustainability of waste biomass-derived activated biochar in PCM loading applications.
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高影响因子
TALANTA
·
2023
·
IF 6.1
Zeying Yang,Boyong Cao,Xiaowei An,Zhongliang Yu,Wuduo Zhao,Fangcheng Su,Guoqing Guan,Yanhao Zhang,Zhengkun Xie,Baoxian Ye
The rapid and sensitive determination of antioxidant N-(1,3-dimethylbutyl)-N′-phenyl- p -henylenediamine (6-PPD) in the environment is crucial for early intervention to prevent its adverse effects. Here, a reliable electrochemical sensor based on a N–C mediated γ-Mo 2 N nanocomposite (γ-Mo 2 N@N–C) modified carbon paste electrode (CPE) was developed and applied for selective and sensitive determination of 6-PPD. Benefiting from the superior stability and faster electron diffusion coefficient , the peak current responded to 6-PPD on the sensor linearly over a concentration range from 5 × 10 −8 mol L −1 to 1.0 × 10 −5 mol L −1 with a detection limit of 1.67 × 10 −8 mol L −1 (4.48 ng mL −1 ). Moreover, the sensor maintained good anti-interference ability in the determination of 6-PPD in soil samples from different regions in Zhengzhou City. Furthermore, the density functional theory (DFT) calculations combined with kinetics analysis proved that the enhanced basicity of the γ-Mo 2 N@N–C facilitated the deprotonation of 6-PPD, with the preferred orientation facet of (200) in γ-Mo 2 N playing a vital role in inducing the dissociation of 6-PPD, thereby improving the sensor's response. Such an electrochemical sensor, with its good stability and superior sensitivity, has the potential to be applied for real-time evaluation and monitoring of environmental pollutants .
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PubMed
高影响因子
ACS Sustainable Chemistry & Engineering
·
2023
·
IF 8.4
Chao Shu,Hao-Yu Zhao,Xiao-Hang Lu,Peng Min,Yan Zhang,Qianlong Wang,Xiaofeng Li,Zhong-Zhen Yu
Organic phase change materials (PCMs) with high enthalpies are ideal for heat storage and release, which are expected to promote the utilization of thermal energy and mitigate energy shortage. However, the inherent inferior light absorbance, poor thermal conduction, and weak shape stability of common organic PCMs severely restrict the absorption, conversion, and utilization of solar energy. Herein, high-quality anisotropic graphene aerogels derived from pre-oxidized polyacrylonitrile (OPAN)/graphene oxide (GO) components are designed for the first time by unidirectional freezing, freeze-drying, carbonization, and graphitization at 2800 °C. The GO component efficiently induces the orientation and graphitization of the OPAN component and converts it to graphitic carbon during graphitization. After vacuum-assisted impregnation with paraffin, an optimal thermally conductive phase change composite (PCC) possessing an enhanced through-plane thermal conductivity of 4.36 W m–1 K–1 at a low graphene content of 1.07 vol %, improved shape stability, and a fairly high latent heat retention of 99.7% is obtained. Thanks to the remarkable light absorbance and solar–thermal conversion capacities, the PCC is efficient in applications of solar–thermal–electrical energy conversion with a competitive output voltage of 1181 mV under irradiation of a simulated solar light of 5 kW m–2. By releasing the thermal energy stored in the PCC, it can continue to power a LED lamp even after solar light irradiation is stopped. This work provides a feasible and efficient methodology for fabricating thermally conductive PCCs with high latent heat retention for application of efficient solar–thermal–electrical energy conversion.
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高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2023
·Vol. 33
·期 43
·2306785
·
IF 19
Jian Sheng,Zhen Han,Guodong Jia,Sheng Zhu,Yifan Xu,Xinrui Zhang,Yixi Yao,Yan Li
Integrating 1D carbon nanotubes (CNTs) and 2D graphene with covalent bonds can inherit the outstanding properties of both components and obtain additional advantages. Here, this work reports the preparation of covalently bonded graphene/CNT (G/CNT) structure by a normal chemical vapor deposition method. Specifically, the pre-synthesized defects on the sidewall of CNTs act as nucleation sites for the growth of graphene sheets to form a branch-leaf structure. Graphene leaves restrict the sliding and re-stacking of CNTs, endowing G/CNT hybrid demonstrates excellent anti-agglomeration properties that are not present in either graphene or CNTs. In addition, the covalently bonded structure and high graphitization degree of graphene sheets and CNTs significantly enhance the comprehensive properties of the G/CNT hybrid material, such as large specific surface area, excellent thermal stability, and high electrical conductivity. Consequently, the microwave absorption properties of G/CNT are significantly enhanced compared with CNTs. This work provides a feasible pathway to synthesize high-performance covalently bonded G/CNT hybrids.
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高影响因子
EUROPEAN POLYMER JOURNAL
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2023
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IF 6
Sijia Ren,Jiachun Feng
Poly(styrene-b-[ethylene-co-butylene]-b-styrene) (SEBS)/paraffin system is a promising class of shape memory polymers and the transition temperature of such materials could be flexibly regulated by choosing different paraffins. However, the difference in shape memory performance of SEBS/paraffin blends containing paraffin with same content but different melting temperature ( T m ) has not been comparatively studied. In this work, two series of SEBS/paraffin blends containing same content paraffin (30 and 70 wt%, respectively) with T m of 28.5 and 61.3 °C (denoted as P L and P H , respectively) were prepared and their shape fixing ratios (R f s) under conventional shape memory (CSM) and reversible plasticity shape memory (RPSM) programming methods were investigated. It was found that these blends with the same paraffin content showed different R f s regardless of the programming method. For example, the 30 wt% P H -containing sample exhibited higher R f under CSM programming, while the 70 wt% P L -containing sample showed higher R f under RPSM programming. By investigating microstructural changes, a possible explanation for the shape memory performance of SEBS/paraffin blends containing paraffin with different T m was proposed. This work was helpful to deepen the understanding of shape memory mechanism and broaden the application of SEBS/paraffin-based shape memory polymers.
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高影响因子
Polymer Chemistry
·
2023
·Vol. 15
·期 4
·276-291
·
IF 4.6
Yu Fan,Yanyun Li,Xinyuan Tang,Junying Zhang,Jue Cheng,Qingsong Lian
High encapsulation rates resulting from excellent compatibility between encapsulated solid–liquid phase change materials (SLPCMs) and cross-linking networks usually lead to high enthalpy loss for polymeric form-stable phase change materials (FSPCMs). Besides, the traditional thermal curing process for preparing polymeric FSPCMs requires a long time and causes much energy consumption. Therefore, the integration of a high encapsulation rate, low enthalpy loss, and an efficient photocuring strategy for designing polymeric FSPCMs is still a challenge. In this work, a series of fast ultraviolet (UV) curable and adjustable comb/bottlebrush epoxy/paraffin FSPCMs with high encapsulation rates and low enthalpy loss were designed and highly efficiently prepared through the chain extension reaction of epoxy resin and octadecylamine (ODA) followed by a photoinitiated thiol–ene click curing reaction. By adjusting the physical entanglement of the molecular chains, compatibility between the 3D cross-linking network and paraffin, and chemical cross-linking density, a high encapsulation rate of paraffin (60 wt%) and ultralow enthalpy loss (0.7%) can be achieved in only 13 min of the photocuring process, and the enthalpy value of the FSPCMs can reach 150.1 J g−1. The effects of the molecular weight, grafting density, and cross-linking density on the phase change properties were systematically discussed. Subsequently, through the introduction of Diels–Alder (D–A) bonds, the recycling and self-healing ability of the epoxy/paraffin FSPCMs was further achieved. This paper not only provides a strategy for preparing polymeric FSPCMs by the fast photocuring process but also can provide theoretical guidance for the optimization of the preparation of self-healing polymeric FSPCMs with high encapsulation rates and ultralow enthalpy loss.
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高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2023
·Vol. 34
·期 11
·2311454
·
IF 19
Cong Liu,Meng Meng,Zhiyu Yang,Shaobin Wu,Ludan Shang,Yuanji Feng,Jiayan Wu,Kai Hao,Ruonan Wang,Danhua Zhou,Shasha He,Yanhui Li,Huayu Tian
Stimulus-responsive large-scale cell culture microcarriers are promising biological materials for large-scale cell production. Herein, multifunctional thermal and magnetic microcarriers (TMMs) made of poly( N -isopropylacrylamide) (PNIPAM), polylysines (PLLs), gelatin methacryloyl (GelMA), poly(ethylene glycol) diacrylate (PEGDA), N,N -methylenebis(acrylamide) (MBA), Fe 3 O 4 and SiO 2 are prepared to achieve large-scale enzyme-free cell harvesting and also can be used as cells stereogrowth scaffold to mimic cells suspension state to develop novel application, such as recombinant proteins produced. In TMMs, NIPAM and other materials are mixed and then underwent in situ radical polymerization by UV irradition with 2-hydroxy-2-methylpropiophenone as initiator, in which GelMA provides cell adhesion sites and PLLs enable a positive microenvironment with SiO 2 as filler. As enzyme-free cell microcarriers, cell harvesting from TMMs by PNIPAM are achieved at 25 °C through vortex oscillation within 15 min and TMMs can be recycled at least for four times by magnetic recovery. Moreover, TMMs can be used as stereoculture scaffold to let cells in suspension as adherent state to improve gene transfection efficiency. Combined with magnetothermal effect, TMMs can further improve gene transfer to obtain industrialization of proteins expression. Therefore, TMMs are potential for the development of cell manufacturing and the expansion of cell stereogrowth application for recombinant proteins production.
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高影响因子
Biofabrication
·
2023
·
IF 9
Jianpei Dong,Jianhua Zhou,Hao Tang,Baiqi Chen,Lu Huang
Cell-laden hydrogel microstructures have been used in broad applications in tissue engineering, translational medicine, and cell-based assays for pharmaceutical research. However, the construction of cell-laden hydrogel microstructures in vitro remains challenging. The technologies permitting generation of multicellular structures with different cellular compositions and spatial distributions are needed. Herein, we propose a laser-guided programmable hydrogel-microstructures-construction platform, allowing controllable and heterogeneous assembly of multiple cellular spheroids into spatially organized multicellular structures with good bioactivity. And the cell-laden hydrogel microstructures could be further leveraged for in vitro drug evaluation. We demonstrate that cells within hydrogels exhibit significantly higher half-maximal inhibitory concentration values against doxorubicin (DOX) compared with traditional 2D plate culture. Moreover, we reveal the differences in drug responses between heterogeneous and homogeneous cell-laden hydrogel microstructures, providing valuable insight into in vitro drug evaluation.
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PubMed
高影响因子
International Journal of Electrochemical Science
·
2023
·
IF 1.5
Ping Li,Shuo Liu,Kang Li,HaiyunZhai,Qing Zhou,Yufang Pan
We studied the electrochemical behaviour of Clobetasol Propionate (CP) on a multi-walled carbon nanotube-modified carbon paste electrode (MWCNTs-CPE) and developed a corresponding determination method. Sample solutions were scanned using cyclic voltammetry (CV) with a homemade MWCNTs-CPE as a working electrode in KH 2 PO 4 -Na 2 B 4 O 7 buffer solution (pH=4.90), and the peak potential and peak current of the cyclic voltammogram were recorded. CP showed a clear oxidation peak near 1.16 V, and the CP concentration exhibited an excellent linear relationship with peak current in the range of 1.0×10 -4 to 1.0x10 -6 mol/L, with a correlation coefficient of 0.999 and a detection limit of 3.45×10 -8 mol/L. The content of CP in a facial mask was determined by this method, the recovery rate was between 98.0% and 106.2% in the presence of interfering substances, and the relative standard deviation (RSD) ranges between 2.0% and 4.1% (n=5). The MWCNTs’CPE showed a good electrochemical response to CP and possessed high sensitivity. This method can be applied to the determination of CP in cosmetics and pharmaceuticals.
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高影响因子
International Journal of Electrochemical Science
·
2023
·
IF 1.5
Qing ZHOU,Ning Long,Lan LIU,Haiyun ZHAI,Mingfang ZHU
A highly selective molecularly imprinted polymer modified carbon paste electrode was developed. The Moxifloxacin Hydrochloride molecularly imprinted polymer was synthesized by thermal initiation precipitation polymerization, and the modified electrode was prepared by mixing graphite and polymer (90:10). Studied the electrochemical behavior and established the determination method of Moxifloxacin Hydrochloride at the electrode. The results showed that the sensor has high selectivity and sensitivity. and exhibited a linear voltammetric response for Moxifloxacin Hydrochloride in the concentration range of 3.13×10 -6 ~2.0×10 -4 mol•L -1 , with the limit of detection (LOD) of 5.9×10 -8 mol•L -1 (S/N=3). The sensor was applied to determine Moxifloxacin Hydrochloride in Avelox tablets and and human serum samples. The recoveries of Moxifloxacin Hydrochloride ranged from 97.2% to 104.5%.
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危险品化学品经营许可证（带存储）