Polymers
·
2026
·Vol. 18
·期 12
·1502
·
IF 5.8
Mujin Yang,Qihan Jia,Shuang Wang,Haibo Wang
Conductive hydrogels are promising materials for fabricating flexible wearable strain sensors. However, their practical application remains limited by several challenges, including poor mechanical strength, unstable sensitivity, restricted stretchability, and poor structural durability. In this study, a zirconium-reinforced conductive hydrogel (PSPZr) with a dual chemical–physical cross-linked network was designed and developed. In the structural framework, polypyrrole-decorated silk fibroin (SF/PPy) functioned as a conductive reinforcing component, acrylamide and sulfobetaine methacrylate constituted the flexible polymer basis, and zirconium ions (Zr4+) acted as ionic cross-linkers to construct a dual cross-linked structure and improve mechanical stability. Due to the synergistic contributions of hydrogen bonding, ionic coordination interactions, and SF/PPy, the optimized PSPZr hydrogel exhibited a tensile strength of 166 kPa and a maximum strain 559%. Additionally, it achieved improved elasticity and reliable shape recovery. Furthermore, the optimized PSPZr hydrogel exhibited a broad working range, sensitivity with a gauge factor of 2.8, rapid response, recovery kinetics, and exceptional cycling stability over 1000 stretching–releasing cycles as wearable strain sensors. This performance enabled real-time and accurate monitoring of diverse human motions. Therefore, this study presents a feasible and versatile strategy for developing mechanically robust and electrically stable conductive hydrogel, providing a new pattern for advanced applications in wearable sensors.
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DOI
PubMed
高影响因子
Journal of Water Process Engineering
·
2025
·
IF 6.7
Yuliang Zhang,Xinhao Yan,Ting Shu,Xiahui Liu,Yanhua Lei,Yuwen Huang,Tao Liu,Xiaobo Chen
The global freshwater shortage underscores the urgent need for efficient and sustainable desalination technologies. Solar-driven evaporation offers a promising solution due to its low energy demand and environmental compatibility, with photothermal materials and evaporator design being key to enhancing performance. In this study, chitosan-based aerogels have been used as the substrate, and a vertical channel structure has been prepared through unidirectional freezing technology in fabricating PPy@GO-CG (polypyrrole@graphene oxide-chitosan) aerogel evaporators. Experimental results have showed that under 1 kW·m −2 simulated solar light, the water evaporation rate can reach 3.79 kg·m −2 ·h −1 , and the solar steam conversion efficiency is as high as 96.16 %. In saline conditions, salt accumulation was not observed until after 60 h of continuous irradiation, indicating strong salt-rejection capability. The evaporator exhibits excellent long-term stability, salt resistance, and inherent antibacterial properties, ensuring both efficiency and reliability for practical use. This work thus offers a promising strategy for solar-driven seawater desalination and thermal energy conversion.
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Advanced Fiber Materials
·
2024
·
IF 17.2
Liu Jiaxin,Qi Shuo,Wang Hongshan,Fu Chiyu,Xu Weilin,Su Bin,Tang Wenyang,Xia Zhigang
Wearable electromagnetic interference (EMI) shielding devices are highly demanded to reduce the endlessly emerging EM pollution. Undesired durability and limited scale-up production capacity are the main obstacles to hinder the industrialized application of flexible EMI wearables. Here, a scalable Fe 3 O 4 /polypyrrole (PPy) embedded cotton/polypropylene (FP@CP) fabric is introduced for EMI shielding and Joule heating, which is achieved by a unique particle flow spinning method. This method can continually manufacture functional yarns in large quantities, followed by weaving into fabrics. The core-sheath yarn structure can highly embed Fe 3 O 4 /PPy shielding layer by polypropylene (PP) strips, which protects internal functional components from leakage or damage by the environment. Consequently, the obtained fabrics present greater durability (50 washing and 465 abrasion cycles) in comparison with most reported EMI devices. The EMI shielding mechanism was investigated through both experimental and simulation methods. It suggests that the combination of EMI reflection and absorption modes synergistically contributes to enhancing the EMI shielding property of obtained fabrics, reaching a maximum total shielding effectiveness (SE T ) of 47 dB. Besides, the composite fabric achieves a high Joule heating temperature to 105 ℃ at 3 V within 10 s due to its efficient electric-thermal property. This work paves a cost-effective way to realize scale-up manufacturing of versatile EM protection textiles to be applied in daily, military and aerospace fields. Graphical
研究领域:
材料科学
·
纺织工程
·
电子工程
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高影响因子
NEW JOURNAL OF CHEMISTRY
·
2024
·Vol. 48
·期 15
·6723-6732
·
IF 2.7
Min Sun,Yu Zhang,Zhijun Liang,Rui Zhang,Kai Zhang,Yanhong Lin,Dejun Wang,Tengfeng Xie
Supercapacitors often deliver a significantly high-power density with a long cycling life but low energy density. An exceedingly promising approach is to construct asymmetric supercapacitors (ASCs) reconciling the compromise between power density and energy density. However, ASCs combining transition metal oxides (TMOs) and activated carbon (AC) struggle to improve energy density due to a vast difference in their specific capacitance. To cross this hurdle, we first proposed a new strategy to construct the ASCs with α-MoO3 as the anode and conductive polymer polypyrrole (PPy) as the cathode. The remarkable features of α-MoO3, including its layered structure and ultra-high specific capacitance, along with the stability and fast charge–discharge ability of PPy, have contributed significantly to the augmentation of power density and energy density in ASCs. Taking advantage of these bright features, the operation voltage for α-MoO3//PPy is effectively expanded to 2.0 V, exhibiting a high energy density of 25.9 W h kg−1 at 1538 W kg−1. Furthermore, the energy density presented a remarkable recovery rate, reaching 91.04% of its initial state after undergoing full rate tests. These conclusions reveal that the construction of α-MoO3//PPy can effectively enhance the energy density and power density of supercapacitors.
研究领域:
材料科学
·
电化学
·
能源存储
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DOI
高影响因子
Materials Today Physics
·
2025
·
IF 9.7
Danyan Zhan,Changhui Fu,Zhengting Yu,Guangyi Tian,Yuxuan He,Xionggang Chen,Zhiguang Guo
Hygroscopic salt-hydrogel-based atmospheric water harvesting (HAWH) technology represents an auspicious approach to alleviating the water crisis, as it is not limited by factors such as climactic. Reducing hygroscopic salt leakage is of the utmost importance to maintaining the technology's consistent performance. Consequently, we have developed a composite hygroscopic material (PPy-AAC-LiCl) with in situ loaded polypyrrole (PPy) as a photothermite. The in-situ loading of PPy not only achieves the photothermal performance of PPy-AAC-LiCl but also enhances the hygroscopic performance, which is due to the presence of nitrogen atoms in the structure facilitating the formation of hydrogen bonds between water molecules, and reduces the leakage of hygroscopic salts attributed to its ability to inhibit the increase in pore size after hygroscopicity of PPy-AAC-LiCl. The experimental results show that PPy-AAC-LiCl has effective hygroscopic performance at relative humidity (RH) of 30 %–90 %. The hygroscopicity at 25 °C and RH 70 % was about 1.53 g water g adsorbents −1 after 12 h. After ten hygroscopicity-desorption cycles, the hygroscopicity of the samples did not decrease significantly, and no white crystals appeared on the surface of the samples during the desorption process. Furthermore, PPy-AAC-LiCl demonstrated effective atmospheric water harvesting capabilities in outdoor trials, exhibiting a desorption rate of 87.6 % and a moisture absorption rate of 1.26 g water g adsorbents −1 . The preparation of this simple and environmentally friendly hygroscopic composite material lays the foundation for the future development of atmospheric water materials.
研究领域:
材料科学
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环境科学
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DOI
高影响因子
CHINESE JOURNAL OF CATALYSIS
·
2018
·
IF 3.525
Hongju Han,Min Fu,Yalin Li,Wei Guan,Peng Lu,Xueli Hu
Polypyrrole-modified graphitic carbon nitride composites (PPy/g-C 3 N 4 ) are fabricated using an in-situ polymerization method to improve the visible light photocatalytic activity of g-C 3 N 4 . The PPy/g-C 3 N 4 is applied to the photocatalytic degradation of methylene blue (MB) under visible light irradiation. Various characterization techniques are employed to investigate the relationship between the structural properties and photoactivities of the as-prepared composites. Results show that the specific surface area of the PPy/g-C 3 N 4 composites increases upon assembly of the amorphous PPy nanoparticles on the g-C 3 N 4 surface. Owing to the strong conductivity, the PPy can be used as a transition channel for electrons to move onto the g-C 3 N 4 surface, thus inhibiting the recombination of photogenerated carriers of g-C 3 N 4 and improving the photocatalytic performance. The elevated light adsorption of PPy/g-C 3 N 4 composites is attributed to the strong absorption coefficient of PPy. The composite containing 0.75 wt% PPy exhibits a photocatalytic efficiency that is 3 times higher than that of g-C 3 N 4 in 2 h. Moreover, the degradation kinetics follow a pseudo-first-order model. A detailed photocatalytic mechanism is proposed with · OH and · O 2 − radicals as the main reactive species. The present work provides new insights into the mechanistic understanding of PPy in PPy/g-C 3 N 4 composites for environmental applications.
研究领域:
材料科学
·
环境科学
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高影响因子
ELECTROANALYSIS
·
2018
·Vol. 30
·期 9
·2035-2043
·
IF 2.851
Shuangyan Liu,Lei Wang,Guoyi Duan,Linan Wang,Zia Ul Haq Khan,Yanzhi Sun,Yongmei Chen,Pingyu Wan
To improve the performance of dopamine (DA) detection in the presence of ascorbic acid (AA) and uric acid (UA), sodium diphenylamine sulfonate/polypyrrole/multi-walled carbon nanotubes (SDPAS/PPy/CNTs) film was fabricated on the surface of gold electrode through one-pot polymerization initiated by electrochemical oxidation. SDPAS were covalently embedded into the backbone of PPy to endow the resultant film with numerous negative-charged terminals, resulting in selective pre-adsorption of protonated DA + on the electrode and switching the following anodic reaction to be an adsorption-controlled process. The detection of DA in the presence of AA and UA by square wave voltammetry method showed an outstanding repeatability with the relative standard deviation of 0.45 %. A good linear relationship was observed between the oxidative peak current and the concentration of DA in the range of 0.827–104 μM (R 2 =0.993), and the limit of detection (LOD) was calculated to be 0.105 μM (S/N=3).
研究领域:
生物医学工程
·
分析化学
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高影响因子
ENVIRONMENTAL RESEARCH
·
2022
·
IF 8.431
Jingqiu Sun,Xian Zhang,You Wu,Chengzhi Hu
Selective separation of nitrate over chloride is crucial for eutrophication mitigation and nitrogen resource recovery but remains a challenge due to their similar ionic radius and the same valence. Herein, a polypyrrole membrane electrode (PME) was fabricated by polymerization of pyrrole (Py) and p-toluenesulfonate (pTS), which was used as a working electrode in redox transistor electrodialysis . The anions in the source solution were first incorporated into the PME at reduction potentials and then released to receiving solution at oxidation potentials. Pulse widths and potentials were optimized to maximize the ion separation performance of PME, resulting in the improvement of NO 3 − /Cl − separation factor up to 6.93. The ion distributions in various depths of PME indicated that both NO 3 − and Cl − were incorporated into PME at negative potentials. Then, NO 3 − was preferentially released from PME at positive potentials, but most Cl − was retained. This was ascribed to the high binding energy between Cl − and PPy/pTS structure, which was 51.4% higher than that between NO 3 − and PPy/pTS structure. Therefore, the higher transport rate of NO 3 − in comparison with Cl − was achieved, leading to a high NO 3 − selectivity over Cl − . This work provides a promising avenue for the selective separation of nitrate over chloride, which may contribute to nitrogen resource recycling and reuse.
研究领域:
环境科学
·
材料科学
·
化学工程
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DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2018
·
IF 8.097
Sisi Yang,Zhenglin Li,Yuanlin Wang,Xuelei Fan,Zhaohua Miao,Ying Hu,Zhuo Li,Ye Sun,Flemming Besenbacher,Miao Yu
High-performance theranostic nanoagents, which integrate multimodal imaging and photothermal therapy for clinical anticancer treatment, are highly desired. Herein, we report the synthesis and bioapplication of a multifunctional theranostic nanoagent based on polyethylene glycol (PEG)-modified polypyrrole (PPy)-coated bismuth (Bi) nanohybrids (referred to as Bi@PPy-PEG NHs) for X-ray computed tomography/photoacoustic (CT/PA) dual-modal imaging and photothermal therapy (PTT). The obtained Bi@PPy-PEG NHs have a distinct core–shell structure with the metallic Bi nanoparticle as the inner core and the PPy-PEG layer as the shell. The Bi@PPy-PEG NHs show excellent physiological stability and compatibility, without noticeable cytotoxicity. Importantly, the NHs exhibit strong NIR absorbance and remarkable photothermal conversion capability and conversion stability, with the photothermal conversion efficiency as high as ∼46.3%. Thanks to the strong PTT effect, highly effective photothermal ablation on cancer cells has been achieved both in vitro and in vivo. Furthermore, a high-contrast in vitro and in vivo CT/PA dual-modal imaging has been realized, showing great potential to provide comprehensive diagnosis information for antitumor treatment. In particular, the CT enhancement efficiency of the NHs is of ∼14.4 HU mM–1, which is ∼3.7-fold that of clinically used iohexol. Therefore, our work highlights the potential of using such core–shell Bi@PPy-PEG NHs as a versatile theranostic nanoplatform for cancer imaging and therapy.
研究领域:
生物医学工程
·
肿瘤学
·
材料科学
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DOI
PubMed
高影响因子
Advanced Materials Technologies
·
2017
·Vol. 3
·期 1
·1700206
·
IF 0
Li Liu,Qiang Lu,Shuanglei Yang,Jiang Guo,Qingyong Tian,Weijing Yao,Zhanhu Guo,Vellaisamy A. L. Roy,Wei Wu
The next-generation energy storage devices are expected to be flexible, cost-effective, and high power storage devices to complement or replace rigid batteries and conventional capacitors for wearable electronic device applications. In this regard, a scalable and cost-effective fabrication of all-printed solid-state microsupercapacitors (MSCs) involving self-template synthesis of Ag@PPy nanocomposites (NCs) as active materials is demonstrated. The as-obtained Ag@PPy NCs exhibit high specific capacitance and are formulated as screen printing inks that are printed to form electrodes on plastic substrates. The Ag current collectors, Ag@PPy NC electrodes, and gel electrolyte are screen printed and fabricated as flexible all-solid-state MSCs exhibiting excellent capacitive features, including remarkable mechanical flexibility of 77.6% after 1000 bending cycles, superior stability of 82.6% after 10000 cycles, and high energy density of 0.00433 mW h cm −2 . The Ag@PPy inks are easily prepared and more than 40 printed MSCs are fabricated on flexible plastic substrates in less than 30 min. It is envisioned that the fully printed flexible all-solid-state MSCs could be a promising candidate for flexible energy storage devices.
研究领域:
材料科学
·
能源技术
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DOI
Advanced Materials Technologies
·
2021
·Vol. 7
·期 3
·2100675
·
IF 7.848
Kun Yang,Haonan Cheng,Bo Wang,Yongsong Tan,Ting Ye,Yongqiang Yang,Chaoxia Wang
Flexible, stretchable, and wearable fabric strain sensors can easily detect human motions and monitor human health, but their utility is limited by poor stability and sensing performance. The stability and sensing performances of the fabric strain sensors are invariably determined by the fabric and conductive materials. Here, a Ti 3 C 2 T x /polypyrrole (PPy) nylon strain sensor is fabricated using a facile one-step polymerization of pyrrole (Py) monomers in the presence of Ti 3 C 2 T x suspension at 0 ° C. The Ti 3 C 2 T x nanosheets/PPy nanospheres heterostructure adhered to the nylon substrate inhibits mutual agglomeration and stacking, which provides more electron transfer pathways. The nylon substrate and two conductive materials endow the sensor with excellent stretchability (50%), low resistance (80 Ω cm −1 ), fast response (40 ms), and recovery (70 ms), a wide sensing range (0–50%), and long-term sensing function (2000 cycles). With these virtues, the prepared Ti 3 C 2 T x /PPy nylon sensor can monitor human activities effectively, including joint bending (finger, elbow, and knee) and subtle motions (carotid pulse, slight pressing, and speaking vibrations). The flexible and highly conductive Ti 3 C 2 T x /PPy strain sensor exhibits a promising sensing performance against the external strain, allowing it to be used in health-care monitoring.
研究领域:
材料科学
·
生物医学工程
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DOI
高影响因子
MATERIALS CHEMISTRY AND PHYSICS
·
2023
·
IF 4.6
Jingpi Gao,En Li,Kena Song,Tongtong Ma,Ran Yang,Yi Zhang,Nan Li,Xiaoran Liu,Jinghua Li
The dye degradation method based on Fenton-like heterogeneous nanostructures has gained significant attention in recent years. We have developed a Copper-Stannum-Polypyrolle-Heterogeneous (Cu–Sn oxide-PPy Heterogeneous, CSPHGs) catalytic system. The system uses a PN junction formed by two oxide semiconductors (Cu 2 O and SnO 2 ) as the core, which is then coated with polypyrolle (PPy) on the outer layer. Under near-infrared (NIR) light irradiation (500.0 μg ml −1 , 1.2w·cm −2 ), the temperature rapidly reached approximately 45 °C within 5 min, demonstrating excellent photothermal performance. We have overcome the limitation of traditional Fenton reactions that require weak acidic conditions for effective operation. Moreover, we have increased the photostability of Cu 2 O monomers by incorporating them into a three-layer heterostructure . The Rhodamine B (RhB) degradation experiment revealed that the generated reactive oxygen species (·OH), effectively catalyze the decomposition of dyes. Within 120 min, the degradation rate exceeded 99%. This research provides a new option for environmental remediation through the combination of photo-Fenton and photothermal processes.
研究领域:
环境科学
·
材料科学
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DOI
高影响因子
危险品化学品经营许可证（带存储）