JOURNAL OF MEMBRANE SCIENCE
·
2022
·
IF 10.53
Nan Li,Zhi Wang,Jixiao Wang
Carbonic anhydrase (CA)-inspired membranes for CO 2 separation were constructed by introducing hydroxypropyl-β-cyclodextrins (Hβ-CDs) into the polyamide networks, which were formed via interfacial polymerization reactions between trimesoyl chloride and tertiary amino-containing monomers . Hydrophobic inner cavities of Hβ-CDs with the hydrophilic exterior can be used to simulate the hydrophobic pockets of CA enzymes. Hydrophilic and hydrophobic regions were constructed via introducing Hβ-CDs into membranes, while the transport of nonpolar CO 2 molecules and polar components (H 2 O and HCO 3 − ) in CO 2 hydration reactions could be enhanced. Meanwhile, tertiary amino groups in biomimetic membranes can act as the base catalysts for CO 2 hydration reactions, which were deemed as carriers for facilitated transport membranes. Biomimetic membranes containing Hβ-CDs and tertiary amino groups exhibited outstanding CO 2 permeance of 2792 GPU and CO 2 /N 2 selectivity of 171 at 0.15 MPa, showing the potentials for low-pressure CO 2 capture. Particularly, CO 2 transport mechanisms were also analyzed for biomimetic facilitated-transport membranes, which can supply new visions for developing novel membrane materials for CO 2 separation.
研究领域:
化学工程
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材料科学
·
环境科学
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DOI
高影响因子
ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Xiaojiong Zhao,Haocheng Jiang,Ping Sun,Ruichao Wei,Saihua Jiang,Jianying Hu,Shuidong Zhang
Hydrogels have attracted significant attention in various fields, such as smart sensing, human–machine interaction, and biomedicines, due to their excellent flexibility and versatility. However, current hydrogel electronic skins are still limited in stretchability, and their sensing functionality is often single-purpose, making it difficult to meet the requirements of complex environments and multitasking. In this study, we developed an MXene nanoplatelet and phytic acid-coreinforced poly(vinyl alcohol) (PVA) composite, denoted as MXene–PA–PVA. The strong hydrogen bonds formed by the interaction of the different components and the enhancement of chain entanglement result in a significant improvement in the mechanical properties of the PVA/PA/MXene composite hydrogel. This improvement is reflected in an increase of 271.43% in the maximum tensile strain and 35.29% in the maximum fracture stress. Moreover, the composite hydrogel exhibits excellent adhesion, water retention, heat resistance, and conductivity properties. The PVA/PA composite material combined with MXene demonstrates great potential for use as multifunctional sensors for strain and temperature detection with a strain-sensing sensitivity of 3.23 and a resistance temperature coefficient of 8.67. By leveraging the multifunctional characteristics of this composite hydrogel, electronic skin can accurately monitor human behavior and physiological reactions. This advancement opens up new possibilities for flexible electronic devices and human–machine interactions in the future.
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PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Mingguang Han,Xilun Ding,Haibin Duan,Sida Luo,Geng Chen
Capacitive humidity sensors have been used for human health monitoring, but their performance may be poor in terms of sensitivity and response time, because of limitations in sensing materials and insufficient knowledge about sensing mechanisms. Herein, a new combination of humidity sensing materials to assemble thin-film based capacitive-type sensors is proposed by using PA-doped polybenzimidazole (PA–PBI) as an electrolyte and laser-carbonized PA–PBI as a carbon electrode (PA–PBI-C). Based on PA involved laser scribing, the flexible sensor can reach excellent humidity-sensing performances with an ultrahigh sensitivity (1.16 × 106 pF RH%–1, where RH represents the relative humidity), a superior linearity (R2 = 0.9982), a fast response time (0.72 s), and a low hysteresis in a wide RH range from 1% to 95%. By further studying P–O decorated porous carbon electrode with superhydrophilicity and the solid-state dielectric electrolyte featured by a high dielectric constant, a synergistic sensing mechanism consisting of a “Water reservoir” and a “Bridge” is established to support advanced health-monitoring applications such as the respiration patterns and skin condition where both sensitivity and response time are critical.
研究领域:
材料科学
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电化学
·
生物医学工程
·
传感器技术
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DOI
PubMed
高影响因子
DESALINATION
·
2024
·
IF 8.3
Tong Wu,Zhen-Liang Xu,Yong-Jian Tang
Various salt additives were widely used to enhance the permeability of thin-film composite (TFC) membranes. Researchers attributed the improvement in TFC membranes to the change in the polyamide (PA) layer. However, the contribution degree of PA layer to TFC membrane permeability enhancement and the effect of salt additives on the substrate are ambiguous. In this study, the effect of salt additives on the permeation resistance of FTC membranes was analyzed. The results showed that the salt additives could reduce both the permeation resistance of the PA layer and substrate, but the effect on the substrate was more pronounced. For example, after adding NaCl, the permeation resistance of the substrate in the heat curing membrane reduced from 0.1764 to 0.0201 bar h m −1 , which was much more than that in the PA layer. This study revealed a new mechanism of salt additives improving the permeability of TFC membranes and deepened the understanding of the action mechanism of salt additives.
研究领域:
材料科学
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化学工程
·
膜技术
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DOI
高影响因子
Science China-Chemistry
·
2025
·
IF 9.7
He Yueyue,Wu Shufang,Li Xiaofei,Zhang Xian-Ming,Fu Dongying
Non-covalent interactions play an indispensable role in the construction of molecular ferroelectrics, as they can regulate the relative orientation and stacking mode between molecules. However, the difficulty and challenge lie in precisely designing and regulating the weak intermolecular interactions, ultimately generating macroscopically reversible spontaneous polarization through synergistic effects, thereby achieving ferroelectricity. Herein, we introduced halogenated ammonium Cl-PA + (Cl-PA + is 3-chloropropylaminium) to regulate non-covalent interactions in the structure of hybrid perovskite, and constructed a photoferroelectric semiconductor (Cl-PA) 2 PbCl 4 with large piezoelectric coefficient ( d 33 = 27.4 pC/N) and high Curie temperature ( T c = 353 K) through the synergistic effect of hydrogen bonding and halogen-halogen interactions. Compared with non-ferroelectric (PA) 2 PbCl 4 (PA + is n -propylaminium), the severe distortion of PbCl 6 octahedra, weakened N–H···Cl hydrogen bond between organic cations and inorganic frameworks, enhanced C–H···Cl hydrogen bond between cations, and the additional Cl···Cl interaction in the structure synergistically induce the ferroelectricity of (Cl-PA) 2 PbCl 4 . In addition, the large dipole moment of Cl-PA is also beneficial for constructing molecular ferroelectrics, and the synergetic effect of non-covalent interactions in (Cl-PA) 2 PbCl 4 provides the possibility for dipole flipping and symmetry breaking. Therefore, constructing molecular ferroelectrics through the synergistic effect of non-covalent interactions essentially utilizes dynamic coupling and precise equilibrium of multiple weak interactions to achieve the formation, stability, and external field flipping of spontaneous polarization. Through this collaborative design, ferroelectrics with high spontaneous polarization ( P s ), low coercive field, and wide temperature range can be achieved, which opens up new directions for flexible electronics and energy storage.
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高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2026
·
IF 19.9
Boru Jin,Rongjie Zhuang,Zhonglong Zhang,Boning Sun,Wenchao Gao,Caofeng Pan
Flexible pressure sensors are often evaluated over only a limited portion of their nominal operating range, making it difficult to simultaneously achieve high-sensitivity, ultrawide- range detection, and reliable signal resolution under large preloads within a single device. Here, we present a geometry-guided strategy for stable pressure sensing from Pa to MPa based on a biomimetic daisy-inspired gradient hemispherical array. By integrating finite-element-analysis-guided optimization with an interpretable simulation-trained surrogate model, the multilevel gradient microstructure is rationally engineered to regulate compressibility and contact-area evolution, thereby mitigating capacitive saturation and extending the accessible pressure range. The resulting iontronic sensor delivers a consistently high sensitivity exceeding 122 kPa −1 over 0–2555 kPa, together with an ultrahigh sensitivity of 1864 kPa −1 in the low-pressure regime (0–61 kPa) and a low detection limit of 7.6 Pa. The device further shows fast response/recovery times below 5 ms, stable operation under repeated loading, and reliable pressure resolution even under MPa-level preloads. Beyond device performance, the surrogate-model interpretation reveals the key multilevel design rules governing the sensing response, establishing a generalizable framework that links bioinspired geometry, interfacial mechanics, and pressure-sensing behavior. This integrated structure-mechanism-modeling strategy provides a practical route toward next-generation ultrawide-range flexible sensors for wearable electronics and human-machine interfaces.
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高影响因子
OPTICAL MATERIALS
·
2022
·
IF 3.754
Peirong Liu,Yingrui Xiao,Zhou Yang,Shouwu Yu,Xianguang Meng
Lead-free double perovskite has become a candidate material for green optoelectronic applications due to its low toxicity and human-friendly characteristics. Double perovskite has a huge application prospect in the field of optical detectors, especially X-ray detection in recent years. By introducing propylammonium (PA), we have grown a larger size 2D double perovskite (PA) 4 AgBiBr 8 single crystal . While inheriting the high stability of the 2D material , it also exhibits good X-ray response. The constructed planar Au/(PA) 4 AgBiBr 8 /Au X-ray detector displays a sensitivity of 6.89 μC Gy −1 cm −2 under 40 V bias voltage and 40 keV X-ray radiation.
研究领域:
材料科学
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光电技术
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辐射检测
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DOI
高影响因子
RSC Advances
·
2023
·Vol. 13
·期 33
·22831-22837
·
IF 3.9
Bin Li,Wenrui Hao,Aolin Wu,Mengjing Zhou,Qinghua Yan,Heng Zhang,Lihua Su
The present study synthesized a deep eutectic solvent (DES) using acrylic acid (AA), acrylamide (AM), and choline chloride (ChCl), and added phytic acid (PA) as a filler. Subsequently, the PA/P(AA-co-AM) composite hydrogel was prepared under ultraviolet irradiation and used a photoinitiator. Characterization of the hydrogels was conducted using Fourier transform infrared spectroscopy (FTIR) and scanning electron microscopy (SEM). The study aimed to investigate the impact of PA on the mechanical properties, fatigue resistance, and electrical conductivity of the composite hydrogel. The findings demonstrated that as the mass fraction of PA increased, the compressive strength of the composite hydrogel gradually decreased, yet the fatigue resistance of the composite hydrogel increased. Specifically, after 10 cycles of compression, the resilience recovery rate of FP0 dropped from 86.9% to 70.4%, the maximum stress recovery rate of FP1 dropped from 97.9% to 89.4%, the maximum stress recovery rate of FP2 dropped from 94.4% to 86.6%, and the maximum stress recovery rate of FP3 dropped from 97.3% to 93%. Overall, this study offers a straightforward and efficient method for producing composite hydrogels with both fatigue resistance and electrical conductivity.
研究领域:
材料科学
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高分子化学
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DOI
PubMed
高影响因子
Nuclear Science and Techniques
·
2025
·Vol. 36
·期 2
·1-13
·
IF 3.8
Xu Si-Yi,Li Dan-Yi,Wang Wen-Rui,Lin Lin,Sun Ying,Li Ji-Hao,Li Lin-Fan
High-performance MXene-based polymer nanocomposites are well-suited for various industrial applications owing to their excellent mechanical, thermal, and other properties. However, the fabrication of flame-retardant polymer/MXene nanocomposites remains challenging owing to the limited flame-retardant properties of MXene itself. This study prepared a novel MXene@Ag@PA hybrid material via radiation modification and complexation reaction. This material was used to further enhance the key properties of ethylene-vinyl acetate (EVA), such as its mechanical properties, thermal conductivity, flame retardancy, and electromagnetic shielding. The addition of two parts of this hybrid material increased the thermal conductivity of EVA by 44.2% and reduced its peak exothermic rate during combustion by 30.1% compared with pure EVA. The material also significantly reduced smoke production and increased the residue content. In the X-band, the electromagnetic shielding effectiveness of the EVA composites reached 20 dB. Moreover, the MXene@Ag@PA hybrid material could be used to further enhance the mechanical properties of EVA composites under electron-beam irradiation. Thus, this study contributes to the development of MXene-based EVA advanced materials that are fire-safe, have high strength, and exhibit good electromagnetic shielding performance for various applications.
研究领域:
材料科学
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高分子化学
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火灾安全工程
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电磁学
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DOI
高影响因子
JOURNAL OF FOOD PROCESSING AND PRESERVATION
·
2023
·
IF 2.5
Ping Zou,Wentao Chen,Ying Xu,Yaohui Wang,Yingyang Zhang,Rong Xu
Flavonoids are polyphenolic compounds with a wide range of biological activities (antioxidation, antitumor, and immunomodulatory). The membrane separation method of flavonoids has a high recovery and biological activity, overcoming the shortcomings of traditional methods for the separation of bioactive molecules. In this study, ethanol-water () solution was used to extract peony seed meal. The extraction rate of total flavonoids from peony seed meal was 35.28%. Five microfiltration membranes, polypropylene (PP), polyvinylidene fluoride (PVDF), cellulose acetate (CA), polyether sulfone (PES), and polyamide (PA), were selected to pretreat the extracts, and their separation performance was investigated. A new PA-supported silicone film was prepared by sol-gel method using 1,2-bis(TRIMETHOXYSILYL)ETHANE (BTESE) as a carrier. The synthesized BTESE/PA composite membrane was applied to the purification of organic silica PSMF solution by nanofiltration process. The optimal pressure of nanofiltration operation is 0.8 MPa, and the membrane flux can reach 2.06 kg·m-2·h-1. The mass concentration of flavonoids in the retention solution was decreased to 860.56 mg·L-1, and the permeable components of PSMF were effectively separated. The total flavonoid content of the purified lyophilized powder was 146.12 mg·g-1, which was 2.4 times that before purification. The results show that PSMF can be effectively separated by BTESE/PA membrane, and the membrane solution has good antioxidant activity.
研究领域:
植物化学
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分离技术
·
生物工程
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DOI
高影响因子
COMPOSITES SCIENCE AND TECHNOLOGY
·
2013
·
IF 3.328
Biyun Li,Huihua Yuan,Yanzhong Zhang
This paper deals with development of a novel poly(methyl methacrylate) (PMMA) based transparent nanocomposite made from using electrospun graphene-incorporated-Nylon 6 (Gr/PA-6) nanofibers as the reinforcement, in which both the mechanical and optical properties of the developed Gr/PA-6/PMMA nanocomposite are paid particular attention. By introducing the concept of electrospun PA-6 nanofibers as the dispersing carrier for graphene nanosheets and by employing a facile self-blending co-electrospinning approach for homogeneously hybridizing nanocomposite nanofibers of Gr/PA-6 with PMMA fibers, aggregation issue of the involved nanofillers (i.e., the Gr nanosheets and the Gr-incorporated PA-6 nanofibers) within the PMMA matrix could be effectively addressed. Visible light transmittance and tensile mechanical properties of the hot-pressed Gr/PA-6/PMMA nanocomposite were examined in relation to the loading fractions of the Gr nanosheets in the nanocomposite. It was demonstrated that a significant enhancement in tensile mechanical properties of the Gr/PA-6/PMMA nanocomposite was accomplished at a Gr loading of merely 0.01 wt%; that is, a nearly 56%, 113% respective improvement of tensile strength , Young’s modulus, and noticeably above 250% increase of fracture toughness were achieved, while the transmittance of the nanocomposite was maintained above 70% (in other words, less than 10% loss in transparency in comparison with neat PMMA) in the visible wavelength range of 400–800 nm.
研究领域:
材料科学
·
纳米技术
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聚合物复合材料
·
光学材料
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DOI
高影响因子
Surfaces and Interfaces
·
2026
·
IF 6
Wenling Fan,Xiao Xu,Lingling Li,Long Sun,Chang Gao,Le Luo,Jingjing Zhang,Ziqi Sun,Ying Xu,Yutong Gao
This study elucidates the stabilization mechanism underpinning the efficient and long-term separation of Traditional Chinese Medicine (TCM) volatile oils from oil-in-water emulsions by polyvinylidene fluoride/phytic acid-polyethyleneimine/Fe3 + (PVDF/PA-PEI/Fe3 + ) membranes. Through integrated molecular docking and Schneider's thermodynamic analysis, we demonstrate that the exceptional stability arises from a dual-crosslinked architecture: (1) High-affinity coordination bonds between phytic acid (PA) and Fe³⁺ (binding energy: −5.2 kcal/mol; ΔH m = 1.05 × 10⁻³ cal/mol) establish a robust framework resistant to chemical and thermal degradation, while (2) Fe³⁺-mediated interfacial bridging—achieved through lone-pair electron sharing with fluorine atoms in PVDF (Polyvinylidene Fluoride) and electrostatic interactions with polyethyleneimine (PEI)—synergistically suppresses delamination. Experimental validation demonstrates exceptional durability: Fourier-transform infrared spectroscopy (FTIR) and Scanning electron microscopy (SEM) analyses confirm retention of Fe³⁺-phosphate coordination bonds and pore structural integrity following 24-h exposures to pH extremes (3–11), 100% ethanol, 95°C thermal treatment, and 0.25 MPa pressure. The membrane sustains >95% oil retention capacity and stable steady-state permeate flux (≈2750 L·m –2 ·h –1 (LMH), 2750 LMH·bar –1 ) throughout the 60-day cyclic operation (8h of filtration per day, with the membrane immersed in the turmeric oil-in-water emulsion during off-operation hours and characterized every 7 days). The high flux is attributed to the synergistic effect of the large-pore PVDF substrate (Molecular weight cut-off (MWCO) of 200,000 Da) and the superhydrophilic PA-PEI/Fe 3+ coating, Tests were conducted on 4 cm-radius membraneswith an effective filtration area of 0.005024 m² under the conditions of Transmembrane pressure (TMP) of 0.1 MPa and 25±1°C.With corrosion resistance demonstrated by negligible flux variation (flux recovery ratio, (FRR) <100%) when treating aggressive turmeric oil emulsions. This study establishes a dual-anchoring strategy that effectively mitigates volatility-induced membrane corrosion, thereby positioning PVDF/PA-PEI/Fe³⁺ membranes as an industrially viable platform for sustainable extraction of Traditional Chinese Medicine (TCM) volatile components. Download: Download high-res image (438KB) Download: Download full-size image
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高影响因子
危险品化学品经营许可证（带存储）