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A NOVEL RESISTIVE HUMIDITY SENSOR BASED ON SODIUM POLYSTYRENESULFONATE/TiO_2 nanocomposites

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Chinese Journal of Polymer Science 2002年第3期20卷 237-241页

作者： Yang Li Mu-jie Yang Yong She Department of Polymer Science and Engineering Zhejiang University, Hangzhou 310027 China Department of Polymer Science and Engineering Zhejiang University Hangzhou 310027

A resistive humidity sensor was prepared based on sodium polystyrenesulfonate (NaPSS)/TiO2 nanocomposites, and its electrical response to humidity was examined. The sensor exhibits better linearity, smaller hysteresis (< 4% RH) and quicker response (absorption: less than 2 s; desorption: less than 20 s) in comparison with sensor composed of NaPSS. The effect of concentration of NaPSS and TiO2 on humidity response of sensors was discussed.

关键词： humidity sensor nanocomposites TiO2 sodium polystyrenesulfonate

nanocomposites Preparation and Its Application to Sensor

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稀有金属材料与工程 2006年第A3期35卷 29-32页

作者： Dianqing Li Zhangfa Tong Xiaowei Huang Shouli Bai Ruixian Luo State Key Laboratory of Chemical Resource Engineering Beijing University of Chemical Technology Beijing 100029 China College of Chemistry and Chemical Engineering Guangxi University Nanning 530004 China Colloge of Biochemistry Engineering Beijing Union University Beijing 100023 China

The nanocomposites of ZnO-SnO_2 and In_2O_3-SnO_2 were prepared by wet chemical co-precipitation method as a novel semiconductor gas sensing materials for the detection of environmentally toxic *** preparation parameters were critical towards the grain size and crystallinity of the obtained *** results showed that these nanocomposites exhibited high sensitivity and selectivity for the detection of CO and NO_x,and the sensitivity depended on the composition of the composite,calcination temperature and operating *** gas sensing properties of the sensors were further improved through incorporation of dopants and surface *** gas sensing mechanism was also discussed by X-ray photoelectron spectroscopic (XPS) and temperature-programmed desorption (TPD) studies.

关键词： ZnO-SnO2 In2O3-SnO2 nanocomposites gas sensor sensing properties

Application of nanotechnology to dentistry:Impact of graphene nanocomposites on clinical air quality

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World Journal of Clinical Cases 2025年第8期13卷 1-7页

作者： Ruth Rodríguez Montaño Mario A Alarcón-Sánchez Melissa Martínez Nieto Juan J Varela Hernández Sarah M LomelíMartínez Department of Health and Illness as an Individual and Collective Process University Center of TlajomulcoUniversity of GuadalajaraTlajomulco de Zuñiga 45641JaliscoMexico Institute of Research in Dentistry Department of Integral Dental ClinicsUniversity Center of Health SciencesUniversity of GuadalajaraGuadalajara 44340JaliscoMexico Department of Biomedical Science Faculty of Chemical-Biological SciencesAutonomous University of GuerreroGuerrero 39090Mexico Instituto Odontológico del Pacífico Sur Chilpancingo de los Bravo 39022Mexico Independent Researcher Tijuana 22116Baja CaliforniaMexico Department of Medical and Life Sciences Centro Universitario de la CiénegaUniversidad de GuadalajaraOcotlan 47810JaliscoMexico Master of Public Health Department of Well-being and Sustainable DevelopmentCentro Universitario del NorteUniversidad de GuadalajaraOcotlan 46200JaliscoMexico

Concerns about air quality in dental clinics where aerosol generation during procedures poses significant health risks,have prompted investigations on advanced disinfection *** editorial describes the strengths and limitations of ventilation and aerosol control measures in dental offices,especially with respect to the use of graphene *** potential of graphene nanocomposites as an innovative solution to aerosol-associated health risks is examined in this review due to the unique properties of graphene(e.g.,high con-ductivity,mechanical strength,and antimicrobial activity).These properties have produced promising results in various fields,but the application of graphene in dentistry remains *** recent study by Ju et al which was published in World Journal of Clinical Cases evaluated the effectiveness of graphene-based air disinfection systems in dental *** study demonstrated that graphene-based disinfection techniques produced significant reductions in suspended particulate matter and bacterial colony counts,when co-mpared with traditional *** these positive results,challenges such as material saturation,frequency of filter replacement,and associated costs must be addressed before widespread adoption of graphene-based disinfection techniques in clinical ***,there is need for further research on material structure optimization,long-term safety evaluations,and broader clinical applications,in order to maximize their positive impact on public health.

关键词： Graphene nanocomposites Antibacterial activity Biomedical applications Air disinfection

Flexible Tactile Electronic Skin Sensor with 3D Force Detection Based on Porous CNTs/PDMS nanocomposites

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Nano-Micro Letters 2019年第4期11卷 35-48页

作者： Xuguang Sun Jianhai Sun Tong Li Shuaikang Zheng Chunkai Wang Wenshuo Tan Jingong Zhang Chang Liu Tianjun Ma Zhimei Qi Chunxiu Liu Ning Xue State Key Laboratory of Transducer Technology Institute of Electronics Chinese Academy of Sciences(IECAS)Beijing 100190People’s Republic of China School of Electronic Electricaland Communication EngineeringUniversity of Chinese Academy of Sciences(UCAS)Beijing 100049People’s Republic of China School of Microelectronics University of Science and Technology of China(USTC)Hefei 230026People’s Republic of China

Flexible tactile sensors have broad applications in human physiological monitoring,robotic operation and human-machine ***,the research of wearable and flexible tactile sensors with high sensitivity,wide sensing range and ability to detect three-dimensional(3D)force is still very ***,a flexible tactile electronic skin sensor based on carbon nanotubes(CNTs)/polydimethylsiloxane(PDMS)nanocomposites is presented for 3D contact force *** 3D forces were acquired from combination of four specially designed cells in a sensing *** from the double-sided rough porous structure and specific surface morphology of nanocomposites,the piezoresistive sensor possesses high sensitivity of 12.1 kPa?1 within the range of 600 Pa and 0.68 kPa?1 in the regime exceeding 1 kPa for normal pressure,as well as 59.9 N?1 in the scope of2.3 N?1 in the region of<0.6 N for tangential force with ultra-low response time of 3.1 *** addition,multi-functional detection in human body monitoring was employed with single sensing cell and the sensor array was integrated into a robotic arm for objects grasping control,indicating the capacities in intelligent robot applications.

关键词： Flexible tactile sensors Electronic skin Piezoresistive sensors CNTs/PDMS nanocomposites 3D force detection

Oligoaniline Assisted Dispersion of Carbon Nanotubes in Epoxy Matrixfor Achieving the nanocomposites with Enhanced Mechanical, Thermaland Tribological Properties

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Chinese Journal of Polymer Science 2017年第3期35卷 446-454页

作者： Bin Chen Jia Chen Jing-yu Li Xin Tong 赵海超王立平 School of Materials Science and Engineering Shenyang University of Chemical Technology Shenyang 11 O142 China Key Laboratory of Marine Materials and Related Technologies Zhejiang Key Laboratory of Marine Materials andProtective Technologies Ningbo Institute of Materials Technology and Engineering Chinese Academy of Sciences Ningbo 315201 China

A critical challenge for initiating many applications of the carbon nanotubes(CNTs) is their dispersion in organic solvent or in polymer melt. In the present study, we described a novel strategy for fabricating carbon nanotubes(CNTs)-reinforced epoxy nanocomposite by utilizing aniline trimer(AT) as the noncovalent dispersant. Tensile testing showed that the tensile modulus of the CNTs-reinforced epoxy composites was considerably improved by adding a small amount of AT functionalized CNTs. Additionally, the as-prepared CNTs-epoxy nanocomposites exhibited superior tribological properties with much lower frictional coefficients and wear rates compared to those of neat epoxy resin. The well dispersed AT-functionalized CNTs in epoxy matrix played an important role in enhancing the mechanical properties, as well as acting as a solid lubricant for improving the tribological performance of epoxy/CNTs nanocomposite.

关键词： Carbon nanotubes Epoxy Mechanical Tribological nanocomposites

Preparation and property of CL-20/BAMO-THF energetic nanocomposites

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Defence Technology（防务技术） 2019年第3期15卷 306-312页

作者： Teng Chen Yan Zhang Shuang-feng Guo Liu-ming Zhao Wei Chen Ga-zi Hao Lei Xiao Xiang Ke Wei Jiang National Special Superfine Powder Engineering Research Center of China School of Chemical Engineering Nanjing University of Science and Technology Nanjing 210094 PR China Xi'an Modern Chemistry Research Institute Shaanxi 710065 PR China

A sol-gel freezing-drying method was utilized to prepare energetic nanocomposites based on 2, 4, 6, 8,10, 12-hexanitro-2, 4, 6, 8, 10, 12-hexaazaisowurtzitane(CL-20) with 3, 3-Bis(azidomethyl) oxetanetetrahydrofuran copolymer(BAMO-THF) as energetic gel matrix. Scanning electron microscopy(SEM),X-ray diffraction(XRD), Raman, Fourier-transform infrared spectroscopy(FT-IR) and differential thermal analyser(DTA) were utilized to characterize the structure and property of the resultant energetic nanocomposites. Compared with raw CL-20, the average particle sizes of CL-20 in CL-20/BAMO-THF energetic nanocomposites were decreased to nano scale and the morphologies of CL-20 were also changed from prismatic to spherical. FT-IR detection revealed that CL-20 particles were recrystallized in BAMO-THF gel matrix during the freezing-drying process. The thermal decomposition behaviors of the energetic nanocomposites were investigated as well. The thermolysis process of CL-20/BAMO-THF nanocomposites was enhanced and the activation energy was lower compared with that of raw CL-20,indicating that CL-20/BAMO-THF nanocomposites showed high thermolysis activity. The impact sensitivity tests indicated that CL-20/BAMO-THF energetic nanocomposites presented low sensitivity performance.

关键词： CL-20/BAMO-THF nanocomposites Kinetic Thermodynamic Impact sensitivity

g-C3N4-based nanocomposites for the photocatalytic degradation of VOCs:A review

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Progress in Natural Science:Materials International 2023年第4期33卷 407-424页

作者： Huanran Miao Wenquan Zhang Tong Wang Zhimao Yang Chuncai Kong Ministry of Education Key Laboratory for Non-equilibrium Synthesis and Modulation of Condensed Matter Shaanxi Province Key Laboratory of Advanced Functional Materials and Mesoscopic Physics School of Physics Xi'an Jiaotong University Shaanxi Coal Chemical Industry Technology Research Institute Co. Ltd.

With the rapid development of industries, the emission of volatile organic compounds(VOCs) produced by various chemical projects has been deteriorating the surrounding ecological environments and health of human being. Photocatalysis is an economic approach to solve environmental problems by using light irradiation to kick off chemical reactions under the action of photocatalysts. Owing to a narrow band gap, suitable redox potential,and high chemical stability, graphite carbon nitride(g-C3N4) has been widely adopted for performing cost-effective photocatalysis. However, the rapid recombination of electrons(e-) and holes(h+) on pure g-C3N4leads to its poor photocatalytic activity. To alleviate this shortcoming, g-C3N4has been reported in composite form(doped with other nanomaterials: carbon, metal, oxide, ion doping etc.) Herein, we review detail research progress of four g-C3N4-based photocatalytic nanocomposites for the degradation of VOCs. Finally, we propose a scope for future research work for fabricating advanced g-C3N4-based heterostructure composite photocatalysts to treat VOCs admission.

关键词： g-C_3N_4 nanocomposites Photocatalytic degradation VOCs

Review on nanocomposites fabricated by mechanical alloying

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International Journal of Minerals,Metallurgy and Materials 2019年第9期26卷 1047-1058页

作者： Mohammed A. Taha Rasha A. Youness M.F. Zawrah Solid State Physics Department National Research CentreEl Buhouth St.Dokki 12622CairoEgypt Spectroscopy Department National Research CentreEl Buhouth St.Dokki 12622CairoEgypt Refractories Ceramics and Building Material DepartmentNational Research CentreEl Buhouth St.Dokki 12622CairoEgypt

Composites are composed of multiphase materials, where each phase has specific properties that differ from those of the other phases which can effect on the whole properties of composite. nanocomposites are class of materials that contain at least one phase in the nanometric size range and can be produced by any suitable technique for preparing nanomaterials. Composites are an interesting class of materials that have recently been used in numerous applications, including structural, biomedical, electronics, and environmental applications. In composites, reinforcements might be fibers, particulates, or whiskers. Mechanical alloying(MA) is a promising technique for producing nanocomposite materials that are difficult or impossible to prepare via conventional techniques. In this review, we provide an overview of nanocomposites prepared by the MA process. The mechanism of milling and other milling parameters are overviewed, and insights into sintering categories and parameters are also presented.

关键词： nanocomposites mechanical alloying fabrication sintering

Bioinspired robust nanocomposites of cooper ions and hydroxypropyl cellulose synergistic toughening graphene oxide

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Science China(Technological Sciences) 2017年第5期60卷 758-764页

作者： ZHANG Qi WAN SiJie JIANG Lei CHENG QunFeng Key Laboratory of Bio-inspired Smart Interfacial Science and Technology of Ministry of Education School of Chemistry and EnvironmentBeihang University State Key Laboratory for Modification of Chemical Fibers and Polymer Materials Donghua University

The hierarchical micro/nanoscale layered formation of organic and inorganic components of natural nacre, results in abundant interracial interactions, providing an inspiration for fabricating bioinspired nanocomposites through constructing the interfacial interactions. Herein, we demonstrated the synergistic interfacial interactions of hydrogen bonding from hydroxypropyl cellu- lose and ionic bonding from copper ions upon the reduced graphene oxide based bioinspired nanocomposites, which show the integrated tensile strength, toughness and excellent fatigue-resistant property, as well as high electrical conductivity. These ex- traordinary properties allow this kind of bioinspired nanocomposites to potentially utilize in the fields of aerospace, flexible electronics devices, etc. This study also opens a door for fabricating excellent mechanical performance graphene-based bioin- spired nanocomposites via synergistic interfacial interactions in the future.

关键词： bioinspired robust nanocomposites synergistic toughening cooper ions