Polymers
·
2022
·Vol. 14
·期 5
·859
·
IF 4.967
Xiujuan Wang,Xiaoyu Gao,Yu Wang,Xin Niu,Tanyu Wang,Yuanjun Liu,Fangxi Qi,Yaming Jiang,Hao Liu
In recent years, the research of flexible sensors has become a hot topic in the field of wearable technology, attracting the attention of many researchers. However, it is still a difficult challenge to prepare low-cost and high-performance flexible sensors by a simple process. Three-dimensional spacer fabric (SF) are the ideal substrate for flexible pressure sensors due to its good compression resilience and high permeability (5747.7 mm/s, approximately 10 times that of cotton). In this paper, Thermoplastic polyurethane/Polypyrrole/Polydopamine/Space Fabric (TPU/PPy/PDA/SF) composite fabrics were prepared in a simple in-situ polymerization method by sequentially coating polydopamine (PDA) and Polypyrrole (PPy) on the surface of SF, followed by spin-coating of different polymers (thermoplastic polyurethane (TPU), polydimethylsiloxane (PDMS) and Ecoflex) on the PPy/PDA/SF surface. The results showed that the TPU/PPy/PDA/SF pressure sensors prepared by spin-coating TPU at 900 rpm at a concentration of 0.3 mol of pyrrole monomer (py) and a polymerization time of 60 min have optimum sensing performance, a wide working range (0–10 kPa), high sensitivity (97.28 kPa−1), fast response (60 ms), good cycling stability (>500 cycles), and real-time motion monitoring of different parts of the body (e.g., arms and knees). The TPU/PPy/PDA/SF piezoresistive sensor with high sensitivity on a highly permeable spacer fabric base developed in this paper has promising applications in the field of health monitoring.Keywords:space fabric;Polypyrrole (PPy);piezoresistive sensors;thermoplastic polyurethane (TPU) coating
研究领域:
材料科学
·
柔性电子
·
健康监测
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SENSORS
·
2019
·Vol. 19
·期 3
·640
·
IF 3.031
Meng Li,Jing Wu,Haiping Su,Yan Tu,Yazhuo Shang,Yifan He,Honglai Liu
In this work, three different aqueous solutions containing imidazole-based ILs with different alkyl chain lengths ([Cnmim]Br,n= 2, 6, 12) were adopted as the medium for the synthesis of ionic liquid-polypyrrole (IL-PPy) composites. Herein, the ILs undertook the roles of the pyrrole solvent, the media for emulsion polymerization of PPy and PPy dopants, respectively. The electrochemical performances of the three IL-PPy composites on a glassy carbon electrode (GCE) were investigated by electrochemical experiments, which indicated that [C12mim]Br-PPy (C12-PPy) composites displayed better electrochemical performance due to their larger surface area and firmer immobilization on the GCE. Further, C12-PPy/GCE were decorated with Au microparticles by electrodeposition that can not only increase the conductivity, but also immobilize sufficient biomolecules on the electrode. Then, the obtained C12-PPy-Au/GCE with outstanding electrochemical performance was employed as a horseradish peroxidase (HRP) immobilization platform to fabricate a novel C12-PPy-Au-HRP/GCE biosensor for H2O2detection. The results showed that the prepared C12-PPy-Au-HRP/GCE biosensor exhibited high sensitivity, fast response, and a wide detection range as well as low detection limit towards H2O2. This work not only provides an outstanding biomolecule immobilization matrix for the fabrication of highly sensitive biosensors, but also advances the understanding of the roles of ILs in improving the electrochemical performance of biosensors.Keywords:ionic liquids (ILs);polypyrrole (PPy);gold particles;horseradish peroxidase (HRP);enzyme immobilization;hydrogen peroxide sensor
研究领域:
材料科学
·
电化学
·
生物传感器
·
分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2024
·
IF 6.3
Jing Lv,Heng Zhai,Haifeng Yang,Qiong Wu,Hongtao Bi,Changping Guo,Linghua Tan
To increase the industrial safety and reduce the electrostatic accumulation of ultrafine powder, we propose an antistatic modification strategy to present a new electrostatic dissipation structure, CL-20-based conducting composites with polypyrrole (PPy), which is synthesized using a pyrrole self-polymerization process. Based on the designed structures, density functional theory methods not only predict that the forming process of CL-20/pyrrole structure is spontaneous thermodynamically, but explore its desensitizing mechanism, that is, reducing the energy barrier to improve the electron transition by narrower energy gap of modified explosive. Experimental results demonstrate that new CL-20@PPy conducting structure possesses a smooth polymers cage resulting in a high drop height ( H 50 ) (44 cm) and a low friction sensitivity (108 N), which significantly exceeds those of CL-20 of 13 cm and 72 N in turn. Besides, CL-20@PPy composites exhibit a steady electrostatic dissipation characteristic with a lower volume resistivity of ∼10 9 Ω·cm, this complex conducting polymers matrix can evacuate the electrostatic charges on the surface of CL-20, thereby it has an excellent 50 % firing energy ( E 50 ) of 1.44 J compared to CL-20 (0.83 J). As conclusion, this adaptive and universal strategy shows a great promise for potential applications and can be extensively used in the construction for desensitizing high-energy material.
研究领域:
材料科学
·
爆炸物安全工程
·
理论化学
✓ 已验证
DOI
高影响因子
POLYMER
·
2025
·
IF 4.5
Hong Lei,Yang Qiu,Zhijuan Pan,Bin He,Tao Yan
The development of conductive polyester (PET) fibers is of great significance in increasing their added value and application in functional textiles. However, the continuous preparation of conductive PET fibers with high strength and durability is still a challenge. In this work, polypyrrole/waterborne polyurethane (PPy/WPU)/PET composite conductive fibers (PWPFs) were continuously prepared by in-situ polymerization of blended pyrrole (Py)/WPU. The study investigated the effects of alkali concentration and treatment time on the moisture regain rate of PET fibers to improve the hydrophilicity. The effects of polymerization cycles and mass fraction of WPU on the microstructure and electrical property of PWPFs were studied. The result demonstrated that the moisture regain of PET fibers increased from 0.45 % to 1.13 % when treated in a 50 g/L NaOH solution for 6 h. A stable composite structure of WPU/PPy was formed on the surface of conductive PET fibers, prepared with 5 polymerization cycles and a WPU mass fraction of 5 wt%, achieving a resistance of 58.41 kΩ/cm. The PPy/WPU composite conductive layer partially compensated for the mechanical properties lost by PET fibers during alkaline treatment. Notably, the abrasion resistance and washing resistance of PWPFs were excellent. The conductivity of PWPFs was highly correlated with the environmental humidity, temperature, salinity, and ultraviolet light irradiation and recoverable when environmental conditions underwent cyclic changes, which demonstrated that the PWPFs could be used for multi-functional sensing applications.
研究领域:
材料科学
·
高分子科学
·
纺织工程
·
传感技术
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
FOOD CHEMISTRY
·
2024
·
IF 8.5
Yukun Yang,Xiaoyi Zhang,Xiaomin Wang,Xu Jing,Ligang Yu,Baoqing Bai,Tao Bo,Jinhua Zhang,Hailong Qian,Ying Gu
As an emerging porous material, hydrogen-bonded organic framework materials (HOFs) still pose application challenges. In this work, the designed type “I + II” heterojunction extracted hot electrons from HOFs using quantum dots (QDs) and polypyrrole (Ppy), improving the stability and photoelectrochemical performance of materials. In addition to serving as a potential well, electropolymerized Ppy was used as a recognition element for bisphenol A (BPA), and a novel self-powered molecularly imprinted photoelectrochemical (MIP–PEC) sensor was designed. The sensing platform showed a linear relationship from 1 × 10 −10 to 1 × 10 −7 mol∙L −1 and from 1 × 10 −7 to 1 mol∙L −1 with an acceptable detection limit of 4.2 × 10 −11 mol∙L −1 . This is the first application of HOFs in constructing MIP–PEC sensors and a new attempt to improve the stability of HOFs for the application of porous crystal materials in the sensing field.
研究领域:
分析化学
·
材料科学
·
环境科学
·
纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
LANGMUIR
·
2023
·
IF 3.9
Zhimin Yang,Zefeng Wei,Yunpeng Xing,Liang Zhao,Yaqing Zhang,Congcong Xin,Teng Fei,Sen Liu,Tong Zhang
The development of room-temperature chemiresistive gas sensors with low limit of detection, high sensitivity, and selectivity for dimethyl methylphosphonate (DMMP) detection remains a challenge. Herein, a synergy of the two intermolecular hydrogen bond-promoted approach was proposed to fabricate a room-temperature DMMP sensor with enhanced performances. As a proof of concept, ternary p-hexafluoroisopropanol phenyl (HFIP) functionalized polypyrrole-reduced graphene oxide hybrids (HFIP-PPy-rGO) were rationally designed. During the sensing process, rGO serves as a conductive carrier, ensuring that the sensors operate at room temperature, and both HFIP and PPy act as adsorption sites for DMMP through hydrogen bonding interactions. As expected, the HFIP-PPy-rGO sensor exhibits high selectivity and sensitivity to DMMP. Besides, the HFIP-PPy-rGO sensor also possesses excellent linear response to DMMP and long-term stability. Experimental results and quartz crystal microbalance measurements prove that the specific recognition of DMMP is realized by forming two intermolecular hydrogen bonds between HFIP and DMMP, as well as PPy and DMMP. Additionally, the introduction of HFIP groups also contributes to adjusting device conductivity, enhancing signal conversion function. To put the DMMP sensor into potential practical application, the obvious sensing response to different DMMP concentrations in soil was confirmed, and a wireless detection system was built to realize real-time monitoring of DMMP concentrations in the surroundings. Overall, this study provides a facile and practical solution for improving the sensing performance of room-temperature sensors based on the hydrogen bond theory.
研究领域:
材料科学
·
化学传感器
·
纳米技术
·
环境监测
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF MEMBRANE SCIENCE
·
2025
·
IF 9
Tianmeng Zhang,Zhongyang Huang,Dengshuo Cui,Zicheng Luo,Xiuping Zhuo,Yanfeng Liu,Xiuyan Wang,Kai Wu,Jianfeng Zhang,Guibin Li,Shumei Sun,Han Zuilhof,Hao Lu
Two-dimensional (2D) lamellar membranes hold immense promise for sustainable separation technologies, yet their inherent dense interlayer architecture compromises permeability and selectivity. Herein, we propose a defect engineering strategy to construct hierarchical nanofluidic channels within graphene oxide (GO) membranes, by using intercalating polypyrrole (PPy) nanosheets with in-plane nanopores. The synergistic assembly of GO and PPy nanosheets enables tuning of both interlayer spacing and intra-plane nanopores, thereby generating multiscale transport pathways. The optimized PPy/GO membrane achieves a trade-off between selectivity and permeability: >96 % rejection for Congo red, <15 % rejection for salts (NaCl, Na 2 SO 4 , CaCl 2 ), and a remarkable water flux of 310 L m −2 h −1 bar −1 — 5-fold higher than state-of-the-art 2D membranes. Interface selective sum frequency generation (SFG) spectroscopy results reveal that PPy intercalation greatly enhances the order of hydrogen-bonded water at the membrane-water interface, which correlates with the fast and selective separation of dye and salt. Molecular dynamics and hydrodynamic simulations consolidate that the hierarchical channels enhance water permeation via defect-pore sieving, while selectively block organic dyes through size exclusion. Our work not only disentangles the intricate role of defect engineering in tailoring organic/salt separation for 2D membranes, but also provides a scalable approach for advanced separation systems in hypersaline wastewater treatment and resource recovery.
研究领域:
膜科学
·
纳米技术
·
分离技术
·
材料科学
·
环境工程
·
物理化学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Xiaomin Song,Longjin Huang,Yongjie Li,Huiqin Tang,Zhiqiang Wang,Haobin Zhang,Xu Zhou,Jie Li,Shiliang Huang,Jie Sun,Jinjiang Xu
The pursuit of high energy density materials (HEDMs) with intrinsic safety has long been hindered by the energy-safety trade-off. This study proposed a hierarchical structure strategy integrating lattice stabilization and surface energy dissipation to address this challenge in HNIW. Embedding N 2 O molecules within the explosive lattice by hydrogen bonding effectively improved the oxygen balance of HNIW, resulting in the construction of HNIW/N 2 O host-guest explosives. Concurrently, polyethyleneimine (PEI) and polypyrrole (PPy) were employed for surface coating to further enhance the safety performance of explosives. The lattice-surface modifications synergistically achieved prominent mechanical stimulus buffering (IS>20 J, FS > 140 N) and enhanced phase stability (203 °C). Benefiting from the hierarchical structure, the HNIW/N 2 O@PEI and HNIW/N 2 O@PPy composites exhibited superior comprehensive characteristics including remarkable energy performance, improved safety and combustion properties. The lattice-surface optimization surpassed traditional single-scale modifications in balancing explosive energy and safety, yielding unprecedented performance integration. The work can present a scalable approach for developing next-generation energetic materials, providing valuable design insights for multifunctional material engineering.
研究领域:
含能材料
·
材料科学
·
炸药工程
·
化学工程
·
纳米技术
·
应用化学
✓ 已验证
产品关联
DOI
高影响因子
TALANTA
·
2024
·
IF 5.6
Jianwen Fei,Wei Yang,Yin Dai,Wei Xu,Huizhu Fan,Yani Zheng,Junli Hong,Jun Zhang,Wanying Zhu,Xuemin Zhou
The enzyme-like properties of nanozymes may be considerably affected by the structure and surface groups, which thus need to be optimized. Here, through a simple NaOH chemical corrosion method, the chemical structure similar to N-Methylpyrrolidone (NMP), which possessed intrinsic oxidase-like activity, was introduced into polypyrrole (PPy), and then this nanomaterial became oxygen-functionalized PPy ( o -PPy) with excellent oxidase-like activity from PPy without this property. Furthermore, after compounding magnetic Fe 3 O 4 , the obtained nanocomposites Fe 3 O 4 @o-PPy nanoparticles (Fe 3 O 4 @o-PPy NPs) showed superiorities in separation during synthesis and real-time control of enzyme catalysis . Studies have found that the enzymatic activity of Fe 3 O 4 @o-PPy NPs depended on the amount of functionalized oxygen and the conjugation extent of o -PPy. Fe 3 O 4 @o-PPy NPs had efficient oxidase-like activity under a wide range of pH and temperature. Based on the oxidase-like activity of Fe 3 O 4 @o-PPy NPs, a colorimetric sensor for glutathione (GSH), which presented rich color changes and satisfactory colorimetric resolution by adding the amaranth , was realized. We believe that the functional modification and structural regulation of PPy can not only realize its wider application but also promote the discovery of novel and efficient nanozymes .
研究领域:
材料科学
·
纳米技术
·
分析化学
·
生物化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Zeyu Wang,Fengkai Zhou,Yimeng Li,Shasha Wang,Wei Li,Haizhi Liu,Meiqi Hu,Fujun Wang,Lu Wang,Jifu Mao
Flexible sensors are an important component of wearable medical electronics and hold considerable promise for research. Presently, stretchable strain sensors face two primary challenges: balancing the sensing range with sensitivity, and ensuring compatibility between conductivity and mechanical properties. Here, flexible sensing fibers with high gauge factor (GF) and wide monitoring range are reported based on a hierarchical structure composed of electrostatic adsorption principle and hydrogen bonding interactions. The hierarchical structure material consists of thermoplastic polyurethane (TPU), MXene, polypyrrole (PPy) and waterborne polyurethane (WPU). Among them, MXene (2D) and PPy (3D) are uniformly distributed on the surface of the MXene/TPU fiber (1D) to form a conductive and sensing pathway. This multi-dimensional combination approach enables the fiber sensor to have a high sensing range (0 ∼ 106 %) and high sensitivity (60 ∼ 3.23 × 10 6 ). In addition, the WPU acts as a protective layer, which not only reduces the damage to the sensing layer, but also improves the stretchability (>750 %) and modulus (∼12 MPa) of the sensor. Therefore, it can function as fiber sensor for monitoring not only human movement but also swelling in the legs of patients with varicose veins. The sensor also has a joule heating effect, as well as the potential to be integrated into fabrics, providing an important case for the construction of multifunctional flexible wearable medical electronics with practical applications.
研究领域:
材料科学
·
纳米技术
·
生物医学工程
·
可穿戴技术
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry C
·
2023
·
IF 6.4
Qian Zhang,Wenchao Ye,Guojiao Li,Yanli Gong,Wenlang Liang,Yongxiang Leng
In this research, we introduce a novel nanotubular-aerogel/hydrogel hybrid (NAHH), a promising material for wearable motion sensors, which combines poly(acrylic acid) (PAA) hydrogel with a polypyrrole (PPy) nanotubular-aerogel network to form a hierarchically porous structure. The NAHH outperforms its individual components in terms of mechanical properties, with an fracture toughness of ∼97 kPa for NAHH-1, compared to ∼1.8 kPa and ∼15.3 kPa for PPy nanotubular-aerogel and PAA hydrogel, respectively. The hybrid material also exhibits robust adhesion to a variety of substrates, including porcine skin, with tensile and shear adhesive strengths of ∼54.7 ± 8.4 kPa and ∼58.1 ± 4.4 kPa, respectively. The incorporation of didecyldimethylammonium bromide (DDAB) imbues the NAHH with effective antibacterial properties against both Gram-negative and Gram-positive bacteria. The biocompatibility of the NAHH is further confirmed through a live/dead assay using murine fibroblast 3T3 cells. The NAHH-based motion sensors excel in real-time monitoring of bending and extending motions across various human joints, underscoring their potential for wearable electronic applications. This study presents a versatile platform for the creation of advanced multifunctional materials, with implications for the future of wearable electronics, bioelectronics, and tissue engineering.
研究领域:
材料科学
·
生物医学工程
·
可穿戴技术
·
生物材料
·
传感器
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2025
·
IF 19
Zhiting Cao,Jianye Ren,Yuguan Huang,Tong Li,Zhen Wang,Zhangyi Miao,Jia Jia,Yang Ding
Epidermal immunotherapy represents an emerging treatment method for allergic diseases. Nevertheless, an unformidable obstacle for epidermal drug delivery is the dense stratum corneum of the skin. Here, iontophoresis technology is utilized for epidermal delivery of allergen protein. Briefly, an iontophoresis patch consists of conductive nanofiber polypyrrole (PPy) and polyvinyl alcohol (PVA) by electrospinning technology, onto which cationic lipid dioctadecyl–dimethylammonium bromide vesicles containing ovalbumin (DDA@OVA) are loaded via electrospraying technology, forming a stable in situ composite structure. Compared with DDA@OVA/PVA, DDA@OVA/PPy-PVA demonstrated a significant increase in both allergen release and penetration into the epidermis. Ultimately, a high-level activation of antigen-presenting cells is facilitated. Importantly, DDA@OVA/PPy-PVA induces a significant increase in the levels of helper T cell 1 (Th1)-related cytokines such as IFN-γ and IL-12, inhibits the differentiation of T cells into Th2 cells, and further affects the secretion of OVA-specific IgE and promotes the production of protective antibody IgG. The lung tissue analysis illustrates that DDA@OVA/PPy-PVA treatment achieves regular alveolar structures in the lumen and significantly relieved asthma symptoms. The findings indicate that iontophoresis patches provide multiple benefits, including drug-responsive release, efficient penetration, and advanced therapeutic efficacy. These attributes make iontophoresis patches a promising treatment option for allergic diseases.
研究领域:
生物医学工程
·
药学
·
免疫学
·
过敏研究
·
药物递送系统
·
纳米技术
·
材料科学
·
呼吸系统疾病
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）