APPLIED SURFACE SCIENCE
·
2024
·
IF 6.3
Kequn Sun,Yinghui Dong,Lulu Yao,Mausumi Mahapatra,Yufu Xu
In this investigation, the surface tribological behavior of YG8/TC4 contacts under microgel lubrication was explored, utilizing thermal- and pH-sensitive PNIPAM-co-PAA-(IF-MoS 2 /GO) composite microgels as lubricant additives. Through the application of a ball-on-disk reciprocating tribometer, the study demonstrated the outstanding lubrication capabilities of the composite microgels. The lubrication process involving PNIPAM-co-PAA-(IF-MoS 2 /GO) composite microgels initiated a tribo-chemical reaction, leading to the generation of a larger quantity of TiS 2 with exceptional lubricating properties on the friction surface compared to alternative lubrication conditions. The effective isolation of the friction pair by PNIPAM-co-PAA composite microgels contributed to the reduction in tribo-oxidation of the sliding surfaces , while the presence of IF-MoS 2 facilitated the formation of TiS 2 . Furthermore, the facile sliding property of GO nanosheets played a crucial role in achieving overall excellent lubrication performance. The synergistic effects arising from the components in PNIPAM-co-PAA-(IF-MoS 2 /GO) composite microgels introduce a novel and effective strategy for controlling the friction and wear of YG8/TC4 contacts.
研究领域:
材料科学
·
表面工程学
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产品关联
DOI
高影响因子
NANO
·
2019
·
IF 1.293
Ben Liu,Qiusheng Song,Qiancheng Zhang,Haihong Ma,Ziwen Zhang,Dapeng Wang
In this study, a kind of novel rare-earth nanocrystals/hydroxypropylcellulose–poly (acrylic acid) (HPC–PAA) complex fluorescent nanogel, its responsive behavior to environmental temperature and pH value were reported. For preparation, with HPC being used as template, HPC–PAA nanogel was first synthesized by polymerization and crosslinking reaction of acrylic acid (AA) in water solution. In the process, a redox initiator, which composed of ammonium persulfate (APS) and N,N,N′,N′-tetramethylethylenediamine (TEMED), was used to initiate the reaction. Then, the as-prepared nanogel reacted with Ce(NO 3 ) 3 and NH 4 F solution successively, and a novel CeF 3 nanocrystals/HPC–PAA complex nanogel was fabricated. The microstructure of the nanogel was characterized by Fourier transform infrared (FTIR), X-ray diffraction (XRD), Thermogravimetric (TG) and Transmission electron microscopy (TEM). The environmental sensitivity of the nanogel was investigated by photoluminescence (PL) and UV–Visible spectrophotometer (UV–Vis). The thermo- and pH-sensitive fluorescence were studied by PL at various temperatures and pH values; besides, the behavior of drug loading and release was researched by PL with a famous antibiotic of Ibuprofen as model drug. The results show that the PL intensity of the nanogel was largely affected by environmental temperature, or content of Ibuprofen loaded in the nanogel. The as-prepared nanogel can be used as useful sensitive material to detect temperature and pH value change, and drug loading or release property of Ibuprofen can be detected by PL emission of the nanogels conveniently.
研究领域:
材料科学
·
生物医学工程
·
药学
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产品关联
DOI
高影响因子
Energy Storage Materials
·
2025
·
IF 20.2
Dejun Lu,Yunchao Hao,Zhiqiao Wang,Jun He,Xiaojiang Huang,Yunxiang Shi,Shuai Gao,Huiqing Zhang,Yue Ma,Feng Xu,Yao Yao
Wearable biomedical devices require materials that simultaneously integrate energy storage and sensing, function under extreme conditions, and enable battery self-diagnosis. To address this, we developed a novel ZnCl₂-loaded poly(acrylic acid)-based composite hydrogel (Zn-PAA-C) serving as both a flexible Zn-ion battery electrolyte and a high-performance strain sensor. Engineered with poly(acrylic acid) N-hydroxysuccinimide ester (PAA-NHS), gelatin, and ethylene glycol, Zn-PAA-C exhibits exceptional ionic conductivity, mechanical resilience, and freeze-resistance (down to -80 °C). As a strain sensor, it achieves a broad sensing range (0–180 % strain), reliable operation (1–7 Hz), and rapid response (57 ms). As a battery electrolyte, it uniquely incorporates self-diagnostic capability, enabling real-time monitoring of battery expansion and dendrite formation for enhanced safety and longevity, and supports stable operation over 12,000 charge-discharge cycles. Zn-PAA-C thus transcends traditional gel electrolyte limitations, establishing a new standard for multifunctional materials in wearable biomedical devices capable of robust, continuous health monitoring under extreme conditions.
研究领域:
材料科学
·
生物医学工程
·
电化学储能
·
柔性电子器件
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产品关联
DOI
高影响因子
IET Nanobiotechnology
·
2019
·Vol. 14
·期 1
·67-72
·
IF 1.925
Wenjing Wang,Fengzhen Zhou,Xiyao Cheng,Zhengding Su,Huiling Guo
To effective capture and universal enrichment of His-tagged protein, polyacrylic acid (PAA) brushes were used to encapsulate Fe 3 O 4 nanoparticles, connect NTA, and Ni 2+ to prepare magnetic beads. These materials provide many advantages, such as excellent stability, tuneable particle size, and a surface for further functionalisation with biomolecules. His-tagged green fluorescence protein (GFP) was separated efficiently, and the binding capacity of Fe 3 O 4 /MPS@PAA/NTA-Ni 2+ was 93.4 mg/g. Compared with High-Affinity Ni-NTA Resin and Ni-NTA Magnetic Agarose Beads, Fe 3 O 4 /MPS@PAA/NTA-Ni 2+ nanocomposites exhibited higher separation efficiency and binding capacity towards His-tagged GFP. Moreover, the selectivity and recyclability of them for the target proteins were maintained well after six cycles. This study would widen the application of PAA in constructing multifunctional nanocomposites for biomedical fields.
研究领域:
生物技术
·
蛋白质工程
·
纳米材料
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2023
·
IF 9.5
Ruili Li,Guoqing Xiao,Chunlin Chen,Chunyan Chen,Xinyin Hu,Yuanyuan Li,Zhengwei Yang,Shuyi Shang,Mingtan Wang
Low separation efficiency and poor reusability have become the most important factors restricting the development of membranes in water purification . Herein, a photocatalytic self-cleaning graphene oxide (GO) membrane with a unique intercalated structure of CPU@PAA@TiO 2 (CPU: CNS@PDA@UiO-66-NH 2 , PAA: polyacrylic acid, CNS : carbon nanospheres, PDA: polydopamine) was prepared by simple vacuum filtration self-assembly. The water channels formed by photocatalysis nano-filler CPU@PAA@TiO 2 and the dense laminated structure of GO layer existed in the membrane at the same time. The core-shell CPU has a larger photocatalytic area than UiO-66-NH 2 . Moreover, the crosslinking modification of CPU, PAA, and TiO 2 leads to an excellent water flux, dye separation performance, and photocatalytic activity of composite membranes . The water flux of GO/CPU/PAA/TiO 2 membrane was 230.48 L ∙ m −2 ∙ h −1 ∙ bar −1 , and the flux of three dyes was over 220 L ∙ m −2 ∙ h −1 ∙ bar −1 while the removal rates were over 99.5%. After 120 min of visible light irradiation, the GO/CPU/PAA/TiO 2 membrane exhibited an enhanced degradation (94.21%) for methylene blue because of the suitable band-gap alignment and synergistic effect between CPU and TiO 2 . In addition, the GO/CPU/PAA/TiO 2 membrane exhibited excellent acid/alkaline-stability and reusability in dye filtration and photocatalytic performance. The results indicated that the GO/CPU/PAA/TiO 2 membrane has great potential in water purification and photocatalytic self-cleaning.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2022
·
IF 5.532
Liangmiao Zhang,Yi Du,Hui Xia,Fang xia,Guang Yang,Yanfeng Gao
Hydroxypropyl cellulose (HPC) hydrogel is a promising material for fabricating energy saving smart windows. However, its lower critical solution temperature (LCST = 42 °C) is much higher than comfortable room temperatures. In this work, we applied surface polymerization of acrylic acid (AA) monomers on HPC chains and synthesized HPC-polyacrylic acid (PAA) hydrogels with precisely controllable LCST in the range of 23.0–42.0 °C. The fabricated HPC-PAA hydrogel smart windows exhibited excellent T lum , 22 °C of 91.8% and ΔT sol , 22–40 °C of 73.7%, outperforming VO 2 hydrogel composites and photothermal nanoparticles doped hydrogel smart windows. Meanwhile, cesium tungsten bronze (Cs 0.32 WO 3 ) photothermal nanoparticles can be introduced to the HPC-PAA hydrogel matrix, and the near infrared (NIR) shielding ability of Cs 0.32 WO 3 allowed significant reduction of NIR transmittance of the smart windows from 81.7% to 41.6% at 22 °C, and from 19.3% to 3.6% at 40 °C. Temperature regulation tests in model houses revealed outstanding heat-shielding performance of Cs 0.32 WO 3 (0.4 wt %)/HPC-PAA hydrogel smart windows, especially compared with ordinary double-glass windows. Furthermore, the HPC-PAA hydrogel and Cs 0.32 WO 3 (0.4 wt %)/HPC-PAA hydrogel are non-toxic, biocompatible, low-cost, suggesting their suitability for energy-saving smart window applications.
研究领域:
材料科学
·
能源与环境科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF FOOD SCIENCE
·
2025
·Vol. 90
·期 9
·e70571
·
IF 3.4
Xiaoya Meng,Zhongyu Li,Zili Xia,Dongdong Chen,Zijing Yuan,Yang Han,Heng Zhang,Xia Sun,Jun Seop Lee,Usmanova Surayo Rakhmatzhanovna,Bobokalonov Jamshed Tolehmurodovich,Wenping Zhao
An electrochemical aptasensor based on Ti 3 C 2 T x (MXene) and cDNA-PAA was established for sensitive detection of aflatoxin B1 (AFB1) in peanuts. The high specific surface area of Ti 3 C 2 T x (MXene) contributed to improve electrochemical efficiency and enhancing sensor stability which were characterized by the Randles−Sevcik equation. The self-made polyacrylic acid (PAA) nanogel was added with aptamer complementary chain (cDNA) to form cDNA-PAA nano gel composite, which could realize the synergistic amplification of the difference between the electrochemical signals before and after the addition of AFB1. The sensing effect of cDNA-PAA was validated using DPV. Methylene blue (MB) was modified at the proximal 3′ termini of the aptamer (Apt-MB), meanwhile AuNPs was used to immobilize Apt-MB and improve the efficiency of electrochemical reactions. The competition between AFB1 and cDNA-PAA combined with Apt MB resulted in a significant change in the electrochemical signal current. In addition, the constructed electrochemical aptasensor had a lower detection limit of 1.0 × 10 −3 ng/L for AFB1 under optimal detection conditions, and a detection range of 1 to 1000 ng/L. Moreover, peanuts with different concentrations of AFB1 were used as actual detection samples. Through the constructed sensor detection, the spiked recovery rates within the spiking range of 50 to 500 ng/mL were 97.76% to 101.84% ( n = 3).
研究领域:
生物传感器
·
食品安全检测
·
分子诊断
·
纳米材料应用
·
电化学分析
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2020
·
IF 10.652
Han Chen,Tao Lin,Shisheng Zhang,Hang Xu,Hui Tao,Wei Chen
The application of the integrated Fe II /EDDS/UV/PAA (FEUP) process (EDDS = ethylenediamine- N,N’ -disuccinic acid; PAA = peracetic acid) as a novel advanced oxidation process (AOP) for the degradation of a model contaminant, namely, naproxen (NAP), at neutral pH was investigated. The enhanced NAP degradation in this system at pH 7 was primarily attributable to the continuous activation of PAA via the UV-assisted Fe II /Fe III cycle. A four-phase conceptual process of NAP degradation was established. The instantaneous degradation stage (IDS), in which Fe II and PAA instantaneous react within 1 s, resulted in the degradation of ~ 20% of NAP. The rapid degradation stage (RDS), in which the regenerated Fe II rapidly activates PAA to produce the hydroxyl radicals (•OH) and organic radicals including CH 3 C(O)O•, CH 3 C(O)OO•, CH 3 OO• and •CH 3 (defined as R-C•) without being scavenged by the Fe II /Fe III -EDDS complexes, contributed to the degradation of ~ 55% of NAP. The slow degradation stage (SDS), during which Fe II /Fe III -EDDS complexes started competing for radicals, and resulted in the degradation of ~ 15% of NAP. The continuous degradation stage (CDS), in which hydrogen peroxide (H 2 O 2 ) was the only oxidant because PAA was exhausted, corresponded to the degradation of another ~ 10% of NAP. The effect of water matrices including Cl - /Br - , HCO 3 – /CO 3 2– , and humic acid (HA) was evaluated: Br - , HCO 3 – /CO 3 2– , and HA exhibited an inhibiting effect on NAP degradation, while Cl - showed no influence on NAP degradation in the FEUP process. A superior degradation performance was achieved under a low Fe II dosage and neutral conditions, demonstrating the great potential of the FEUP process for practical applications.
研究领域:
环境科学
·
化学工程
·
水处理技术
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产品关联
DOI
高影响因子
CHEMOSPHERE
·
2022
·
IF 8.943
Zhang-Hong Wan,Jing Guan,Chun-Miao Zhang,Wen-Qing Fei,Lin Wang,Shu-Guang Wang,Xue-Fei Sun
Membrane fouling and the trade-off between membrane permeability and selectivity restrict the potential applications of membrane filtration for water treatment . ZIF-8 was found having great permeability and antibiofouling performance, but with issue on particle aggregation makes it difficult to achieve high ZIFs loading and fabricate a defect-free molecular sieving membrane in previous research. In this study, we formed a scalable antibiofouling surface with improved permeability and fouling resistance on a PEI-ZIF-PAA membrane using a layer-by-layer assembly technique. The synergistic effects of being sandwiched between two different polyelectrolyte layers with opposite charges endowed the ZIF nanoparticles with improved stability and scalability for membrane modification. The PEI-ZIF-PAA membrane exhibited a satisfactory water flux of 120.78 LMH, which was 46.97% higher than that of the pristine PES membrane. The normalized water flux loss was serious in the absence of ZIF-8, and the flux increased with the ZIF-8 concentration. Antifouling tests suggested that the PEI-ZIF-PAA membrane possessed good antifouling performance due to the much higher surface hydrophilicity and positive Lewis acid-base interactions with foulants. The HA rejection increased with the ZIF-8 concentration and reached a maximum of 92.1% in the presence of 1.00% (w/v) ZIF-8. The membrane regeneration was tested under physical and chemical cleaning with flux recovery rates of about 85% and 95%. XDLVO analysis showed that the total interaction energy between HA and the PEI-ZIF-8-PAA membrane was 26.45 mJ/m 2 , and the superior antifouling performance was mainly attributed to Lewis acid-base interactions. This study indicates that ZIF-8 nanocrystals are promising materials for fabricating novel membranes for sewage treatment .
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
PubMed
高影响因子
ACS Applied Energy Materials
·
2021
·
IF 6.024
Liangmiao Zhang,Hui Xia,Fang Xia,Yi Du,Yupeng Wu,Yanfeng Gao
Hydroxypropyl cellulose (HPC) hydrogels exhibit thermal-responsive transparency change due to their temperature-sensitive miscible–immiscible transitions, making them promising thermochromic materials for fabricating energy-saving smart windows. However, their transition temperatures, named lower critical solution temperature (LCST), are too high for building window applications, and it is also challenging to reduce LCST to comfortable room temperature range (e.g., 26–28 °C) in hot seasons. In this work, we report smart windows prepared using poly(acrylic acid) (PAA)-modified HPC hydrogels and demonstrate that the LCST of the resulting HPC/PAA hybrid hydrogels can be effectively tuned by solution pH, from 44 to 10 °C with decreasing pH from 6.0 to 1.0. At pH 2.5, an optimized LCST at 26.5 °C has been achieved. The sandwich-structured smart window, composed of two glass panes and an optimized HPC/PAA hydrogel in between, shows a high visible-light transmittance (Tlum = 90.1%), excellent solar energy modulation (ΔTsol = 47.5%), outstanding heat-shielding performance, and excellent stability after 100 heating and cooling cycles. These optical properties outperform the reported thermosensitive cellulose-based materials, vanadium oxide based smart windows, and other thermosensitive hydrogel-based smart windows. Furthermore, HPC/PAA hydrogels are easy to prepare, nontoxic, biocompatible, low-cost, and environmentally friendly, making them very promising materials for energy-saving and climate-adaptable smart windows.
研究领域:
材料科学
·
化学工程
·
能源效率
·
建筑技术
✓ 已验证
产品关联
DOI
高影响因子
MACROMOLECULAR MATERIALS AND ENGINEERING
·
2022
·Vol. 307
·期 7
·2100948
·
IF 4.402
Jinbiao Min,Zhaoxi Zhou,Jia Zheng,Caibin Yan,Hongyuan Sha,Maochun Hong,Heqing Fu
In this paper, PVA/PAA-PAM-IS/GC composite hydrogels are prepared using polyvinyl alcohol (PVA), poly acrylic acid (PAA), poly acrylamide (PAM), and iron sulfate hydrate (IS) glycerol (GC). The crosslinking network is formed by the coordination of carboxyl groups with ions, which forms PVA with semi-interpenetrating network. The mechanical properties and self-healing properties of PVA/PAA-PAM-IS/GC composite hydrogels are excellent. The stress, strain and self-healing efficiency of PVA/PAA-PAM-IS/GC composite hydrogels can reach 840 kPa, 784%, and above 95%, respectively. The antifreeze and water retention properties of PVA/PAA-PAM-IS/GC composite hydrogels are improved by glycerol. PVA/PAA-PAM-IS/GC composite hydrogels remains flexible at low temperatures and moist for a long time at room temperature. The conductivity of the hydrogel increases with the increase of temperature because the interactions between glycerol, water molecules and ammonium ions are affected by the temperature, the multifunctional conductive hydrogel can be used in strain sensing and temperature sensing. In summary, PVA/PAA-PAM-IS/GC composite hydrogels can provide a guide in the field of electronic intelligence.
研究领域:
材料科学
·
生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES B-BIOINTERFACES
·
2022
·
IF 5.999
Miao Qin,Wenfeng Yuan,Xiumei Zhang,Yizhu Cheng,Mengjie Xu,Yan Wei,Weiyi Chen,Di Huang
Conductive hydrogels based on MXene have gained more attention due to the excellent conductive property and biocompatibility. At present, they have great potential in electronic skins, personally healthcare monitoring and human motion sensing. However, MXene are prone to be oxidized due to the abundant hydroxyls , which results in the unstable conductive property of hydrogel. To improve the shortcoming, conductive PAA/PAM/MXene/TA hydrogel was prepared, in which the introduction of TA can prevent MXene from oxidation owing to the great deal of pyrogallol groups. Mechanical tests showed that the tensile strength , toughness and elongation at break of PAA/PAM/MXene/TA hydrogel are 0.251 ± 0.05 MPa, 0.895 ± 0.16 MJ/m 3 and 560.82 ± 19.56%, respectively, indicating the hydrogel possess good stretchability. In addition, the MXene and TA were introduced into hydrogel through hydrogen bonds , which endow the hydrogel with good restorability and self-healing property. Resistance variation-strain curves demonstrated that the introduction of MXene endue the hydrogel with appreciable sensing performances. Moreover, in vitro cytotoxicity assay indicated that the hydrogel has good biocompatibility. In conclusion, PAA/PAM/MXene/TA hydrogel has great potential in flexible wearable sensor field.
研究领域:
材料科学
·
纳米技术
·
生物医学工程
·
传感器
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）