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2nd IEEE International Conference on Futuristic Technologies, INCOFT 2023

作者： Sabale, Dhanashri Gopal, Animesh Gupta, Aman Shanmuganathan, Kadhiravan Srivastava, Rajat Kale, Sangeeta N Defence Institute of Advanced Technology Applied Physics Department Pune India Polymer Science and Engineering Division-CSIR-National Chemical Laboratory Pune India

ISBN: (纸本)9798350308846

Through this work, polydimethylsiloxane (PDMS) functionalized multiwall carbon nanotubes (fMWCNT) flexible tactile sensors, referred as PDMS-fMWCNT have been explored. These sensor elements are designed to further assist a robotic arm to carry out basic activities such as object gripping and slip detection, which would be armed further with sensor arrays, electronic interface and machine-learning algorithms. The response of PDMS-f-MWCNT is compared to the basic PDMS, and the composite shows better response with higher resolution when measuring change in resistance. Structural characterization shows active hydroxyl groups for f-MWCNTs. With changing percentage of MWCNT (1% to 5%), the percolation threshold was achieved at 2%, which showed the optimized piezoresistive response where the maximum change in resistance was 2.79 MΩ. The sensor with 4% doping showed the optimal linear behavior among all sensors with different doping concentrations. The sensor shows good response time (0.36 s) and recovery time (0.24 s) for 5 rad/s of impact frequency. All the sensors had 2mm ∗ 2mm ∗ 4mm dimensions and were highly porous. The fine interplay between the MWCNT percentage, the basic sample resistivity and the sample recovery resulting in the pressure-handing capacity of the samples show that the optimized sample could work as an excellent tactile sensor for multiple applications ranging from robotic industry to healthcare gadgets. © 2023 IEEE.

关键词： Functionalized MWCNT MWCNT PDMS

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Simultaneous enhancement of phosphorescence and chirality by host–guest recognition of molecular tweezers

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Chinese chemical Letters 2022年第11期33卷 4900-4903页

作者： Diankun Jia Hua Zhong Sixun Jiang Risheng Yao Feng Wang School of Chemistry and Chemical Engineering Hefei University of TechnologyHefei 230009China School of Food and Biological Engineering Hefei University of TechnologyHefei 230009China CAS Key Laboratory of Soft Matter Chemistry Department of Polymer Science and EngineeringUniversity of Science and Technology of ChinaHefei 230026China

A novel type of host-guest recognition systems have been developed on the basis of a Au(Ⅲ) molecular tweezer receptor and chiral Pt(Ⅱ) guests. The complementary host-guest motifs display high non-covalent binding affinity (Ka: ∼10^(4) L/mol) due to the participation of two-fold intermolecular π-π stacking interactions. Both phosphorescence and chirality signals of the Pt(Ⅱ) guests strengthen in the resulting host-guest complexes, because of the cooperative rigidifying and shielding effects rendered by the tweezer receptor. Their intensities can be reversibly switched toward pH changes, by taking advantage of the electronic repulsion effect between the protonated form of tweezer receptor and the positive-charged guests in acidic environments. Overall, the current study demonstrates the feasibility to enhance and modulate phosphorescence and chirality signals simultaneously via molecular tweezer-based host-guest recognition.

关键词： Host-guest chemistry Molecular tweezer Room-temperature phosphorescence Chirality Stimuli-responsiveness

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Supramolecular phenolic network-engineered C-CeO_(2) nanofibers for simultaneous determination of isoniazid and hydrazine in biological fluids

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Chinese chemical Letters 2024年第6期35卷 496-501页

作者： Gang Lang Jing Feng Bo Feng Junlan Hu Zhiling Ran Zhiting Zhou Zhenju Jiang Yunxiang He Junling Guo School of Science Xihua UniversityChengdu 610039China BMI Center for Biomass Materials and Nanointerfaces College of Biomass Science and EngineeringSichuan UniversityChengdu 610065China Southwest Computer Co. Ltd.Chongqing 400060China Bioproducts Institute Department of Chemical and Biological EngineeringThe University of British ColumbiaVancouver V6T 1Z4Canada State Key Laboratory of Polymer Materials Engineering Sichuan UniversityChengdu 610065China National Engineering Laboratory for Clean Technology of Leather Manufacture Sichuan University Chengdu 610065China

Electrochemical sensing provides a powerful technological means for the therapeutic drug monitoring of drug-resistant tuberculosis but requires a functionalized electrode to capture the analytes and catalyze their redox ***,we construct a nickel-tannic acid supramolecular network(Ni-TA)on the surface of electrospun-derived C-CeO_(2) nanofiber for the sensitive and simultaneous detection of isoniazid(INZ)and hydrazine(HYD).Mechanistic investigations demonstrate that Ni-TA is electronegative and hydrophilic,thus facilitating an efficient mass and electron ***-TA/C-CeO_(2) has higher adsorption rate constants(0.091 g mg^(-1)h^(-1)for INZ,and 0.062 g mg^(-1)h^(-1)for HYD)than native C-CeO_(2)(0.075 g mg^(-1)h^(-1)for INZ,and 0.047 g mg^(-1)h^(-1)for HYD).Moreover,Ni-TA/C-CeO_(2)(56Ω)has lower charge transfer resistances than C-CeO_(2)(417Ω).Ni-TA/C-CeO_(2) performs low detection limits and wide linearity ranges for INZ(0.012μmol/L and 0.1-400μmol/L,respectively)and HYD(0.008μmol/L and 0.015-1420μmol/L,respectively),coupled with high selectivity,cycle stability and *** research demonstrated the promising applications of Ni-TA/C-CeO_(2) by analyzing human-collected plasma and urine samples.

关键词： Electrochemical detection Therapeutic drug monitoring Isoniazid Hydrazine Tuberculosis

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Influence of Interfacial Enantiomeric Grafting on Melt Rheology and Crystallization of Polylactide/Cellulose Nanocrystals Composites

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Chinese Journal of polymer science 2022年第1期40卷 93-106页

作者： Hua-Gao Fang Kang-Jie Yang Qi-Zheng Xie Xu Chen Sheng-Li Wu Yun-Sheng Ding Department of Polymer Science and Engineering School of Chemistry and Chemical EngineeringHefei University of TechnologyHefei 230009China Anhui Province Key Laboratory of Advanced Functional Materials and Devices Hefei 230009China Anhui Institute for Food and Drug Control Hefei230051China

Incorporating the surface-grafted cellulose nanocrystals(CNCs)with enantiomeric polylactide(PLLA or PDLA)is an effective and sustainable way to modify PLLA,but their difference in promoting matrix crystallization is still *** this study,the CNCs with identical content and length of PLLA and PDLA(CNC-g-L and CNC-g-D)were prepared and blended with *** rheological properties of PLLA/CNC-gD are greatly improved,indicating that the stereocomplexation can significantly improve the interfacial strength as compared with the conventional van der Waals force in PLLA/***,the matrix crystallizes at a higher rate in PLLA/CNC-g-L than PLLA/***/CNC-g-L15 reaches its half crystallinity in 8.26 min while a longer period of 13.41 min is required for PLLA/*** observation reveals that the superior crystallization behavior in PLLA/CNC-g-L is originated from its higher nucleation efficiency and faster growth *** formation of low content of sc-PLA at the interface can restrict the diffusion of PLLA but contribute less to generate crystalline nuclei,which synergistically leads to the retarded crystallization kinetics in PLLA/*** the mechanism of different interfacial enantiomeric grafting on the melt rheology and crystallization of PLLA is of great significance for the development of high-performance polylactide materials.

关键词： Cellulose nanocrystal Polylactide nanocomposite Interfacial stereocomplexation Crystallization Rheology

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Interplay of Crosslinking Structures and Segmental Dynamics in Solid-Liquid Elastomers

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Chinese Journal of polymer science 2022年第10期40卷 1297-1306,I0012页

作者： Hao Wang Wan-Su Peng Qi Wu Yan Zhao Shi-Tai Wang Yi Yang Jin-Rong Wu Xiao-Liang Wang Rong-Chun Zhang South China Advanced Institute for Soft Matter Science and Technology(AISMST) School of Emergent Soft MatterSouth China University of TechnologyGuangzhou 510640China Key Laboratory of High-Performance Polymer Materials and Technology of Ministry of Education Department of Polymer Science and EngineeringSchool of Chemistry and Chemical EngineeringNanjing UniversityNanjing 210093China State Key Laboratory of Polymer Materials Engineering College of Polymer Science and EngineeringSichuan UniversityChengdu 610065China Suzhou Niumag Analytical Instrument Corporation Chengdu 610065China Guangdong Provincial Key Laboratory of Functional and Intelligent Hybrid Materials and Devices South China University of TechnologyGuangzhou 510640China

There have been significant interests in recent years for incorporating dynamic bonds into polymer materials for achieving multiple functionalities,such as self-healing,recycling,stimuli-responsiveness,and so ***,the impact of dynamic bonds on the polymer dynamics is actually less *** this study,we investigate a self-healing solid-liquid elastomer(SLE),which is a dual-crosslinked network made by coupling a permanently crosslinked polydimethylsiloxane(PDMS)network with polyborosiloxane(PBS)via abundant dynamic boron/oxygen dative *** double-quantum(DQ)NMR reveals that the crosslinking degree is reduced while the structural heterogeneity of network is enhanced with increasing PBS content,i.e.,increasing the content of dynamic boron/oxygen dative *** experiments clearly reveal two chain relaxation modes in the SLE samples with a characteristic relaxation time of around 2.1 s and 11.8 s,corresponding to the relaxation of coupled PBS and PDMS chains,*** master curves obtained from variable-temperature frequency-dependent rheological experiments also reveal enhanced heterogeneity of chain relaxation with increasing PBS ***,the impact of boron/oxygen dative bonds on the Rouse dynamics is further revealed by fast-field-cycling(FFC)NMR experiments,where the spinlattice relaxation rate(R_(1))of all SLE samples follows the same power law of R_(1)(ω)∝ω^(-0.33).Nevertheless,the incorporation of PBS did slightly increase the energy barrier of Rouse *** study well demonstrates a combined use of rheology and solid-state NMR spectroscopy can provide piercing insights into the interplay of crosslinking structures and dynamics of polymer materials.

关键词： Fast-field-cycling NMR Multiple-quantum NMR Rheology Dynamics Dynamic bonds

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Investigation on process mechanism of a novel energy-saving synthesis for high performance Li_(4)Ti_(5)O_(12) anode material

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Journal of Energy Chemistry 2022年第7期31卷 266-275,I0008页

作者： Guochuan Wang Hongmei Wang Guangqiang Ma Xinhe Du Liyu Du Peng Jing Yanqing Wang Kaipeng Wu Hao Wu Qian Wang Yun Zhang Department of Advanced Energy Materials College of Materials Science and EngineeringSichuan UniversityChengdu 610064SichuanChina Engineering Research Center of Alternative Energy Materials&Devices Ministry of EducationSichuan UniversityChengdu 610064SichuanChina School of Biological and Chemical Engineering Panzhihua UniversityPanzhihua 617000SichuanChina College of Polymer Science and Engineering Sichuan UniversityChengdu 610065SichuanChina

Li_(4)Ti_(5)O_(12)(LTO) anode material demonstrates superior cycling performance due to its stable spinel structure and high lithiation/de-lithiation ***,a novel energy-saving solid-phase synthesis route for LTO has been successfully designed,employing the cheap industrial intermediate product of metatitanic acid (HTO) as titanium *** the in-situ Fourier transform infrared spectroscopy (FTIR)and ex-situ X-ray diffraction (XRD),it is revealed for the first time that the amorphous crystal structure of HTO is more conducive for the Li+insertion,making it possible to prepare LTO at a relatively lower sintering *** the dehydration carbonization reaction between glucose and sulfuric acid,an ingenious strategy of glucose pre-coating is adopted to avoid the generation of Li_(2)SO_(4) impurity caused by the residual sulfuric acid on the surface of HTO,which meanwhile enhances the conductivity and inhibits the particle growth of *** obtained ALTO@C anode material consequently exhibits excellent electrochemical performance that 132.0 m Ah g^(-1)is remained even at 20 C,and ultra low decay rate of 0.015% per cycle is achieved during 1000 cycles at 2 ***,LiCoO_(2)//ALTO@C full cell delivers conspicuous low-temperature property (130.7 m Ah g^(-1)at 0.5 C and almost no attenuation after 300 cycles under-20℃).

关键词： Metatitanic acid Carbonization promoted by sulfuric acid Energy-saving Low temperature performance Lithium titanate anode

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The Influence of Silicon Dioxide as a Fuel Additive in a Diesel Engine Fuelled by Pure Palm Oil 4

The Influence of Silicon Dioxide as a Fuel Additive in a Die...

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4th International Symposium on Advances and Innovation in Mechanical engineering, ISAIME 2023

作者： Prahmana, Rico Aditia Darmanto, Prihadi Setyo Reksowardojo, Iman Kartolaksono Prakoso, Tirto Juangsa, Firman Bagja Doctoral Program of Mechanical Engineering Faculty of Mechanical and Aerospace Engineering Institut Teknologi Bandung Bandung40132 Indonesia Program Study of Mechanical Engineering Faculty of Industrial Technology Institut Teknologi Sumatera South Lampung35365 Indonesia Thermal Science and Engineering Research Group Faculty of Mechanical and Aerospace Engineering Institut Teknologi Bandung Bandung Indonesia Department of Chemical Engineering Faculty of Industrial Technology Institut Teknologi Bandung Bandung40132 Indonesia Program Study of Mechanical Engineering Faculty of Industrial Technology Universitas Pertamina Jakarta12220 Indonesia

In the last decade, the Indonesian government has implemented a program to use biodiesel as a substitute for fossil diesel to reduce dependence on fossil fuels. On the other hand, the development of biodiesel as an alternative fuel to replace fossil diesel has several challenges, one of which is the production of biodiesel, which is more complicated and requires a long process. However, the direct use of crude palm oil (CPO) in diesel engines is not recommended because it has many drawbacks. Research recently shows that fuel additives in diesel engines have promising prospects. Therefore, to solve the problem, this study used pure palm oil (PPaO) as the primary fuel, with the addition of silicon oxide (SiO2) as a fuel additive in diesel engines. The results showed that using SiO2 additive in PPaO can increase thermal efficiency by 18.8% at 60% load compared to diesel fuel (DF). Nevertheless, using this fuel increased specific fuel consumption (SFC) by 3.9% on average and increased the opacity by 153% compared to diesel fuel. These results indicate that SiO2 has the potential to be developed as an effective additive to PPaO fuel that can improve the efficiency and performance of diesel engines. © 2025 Institute of Physics Publishing. All rights reserved.

关键词： Biodiesel

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Mixed Ionic-Electronic Conducting Hydrogels with Carboxylated Carbon Nanotubes for High Performance Wearable Thermoelectric Harvesters

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ACS Applied Materials and Interfaces 2023年第48期15卷 56072-56083页

作者： Lee, Chia-Yu Lin, Yen-Ting Hong, Shao-Huan Wang, Chia-Hsin Jeng, U-Ser Tung, Shih-Huang Liu, Cheng-Liang Department of Materials Science and Engineering National Taiwan University Taipei10617 Taiwan Department of Chemical and Materials Engineering National Central University Taoyuan32001 Taiwan National Synchrotron Radiation Research Center Hsinchu30076 Taiwan Institute of Polymer Science and Engineering National Taiwan University Taipei10617 Taiwan Advanced Research Center for Green Materials Science and Technology National Taiwan University Taipei10617 Taiwan

Mixed ionic-electronic conducting (MIEC) thermoelectric (TE) materials offer higher ionic conductivity and ionic Seebeck coefficient compared to those of purely ionic-conducting TE materials. These characteristics make them suitable for direct use in thermoelectric generators (TEGs) as the charge carriers can be effectively transported from one electrode to the other via the external circuit. In the present study, MIEC hydrogels are fabricated via the chemical cross-linking of polyacrylamide (PAAM) and polydopamine (PDA) to form a double network. In addition, electrically conducting carboxylated carbon nanotubes (CNT-COOH) are dispersed evenly within the hydrogel via sonication and interaction with the PDA. Moreover, the electrical properties of the hydrogel are further improved via the in situ polymerization of polyaniline (PANI). The presence of CNT-COOH facilitates the ionic conductivity and enhances the ionic Seebeck coefficient via ionic-electronic interactions between sodium ions and carboxyl groups on CNT-COOH, which can be observed in X-ray photoelectron spectroscopy results, thereby promoting the charge transport properties. As a result, the optimum device exhibits a remarkable ionic conductivity of 175.3 mS cm-1 and a high ionic Seebeck coefficient of 18.6 mV K-1, giving an ionic power factor (PFi) of 6.06 mW m-1 K-2 with a correspondingly impressive ionic figure of merit (ZTi) of 2.65. These values represent significant achievements within the field of gel-state organic TE materials. Finally, a wearable module is fabricated by embedding the PAAM/PDA/CNT-COOH/PANI hydrogel into a poly(dimethylsiloxane) mold. This configuration yields a high power density of 171.4 mW m-2, thus highlighting the considerable potential for manufacturing TEGs for wearable devices capable of harnessing waste heat. © 2023 American chemical Society.

关键词： Carbon nanotubes

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Modeling and Heat Storage Mechanism of Thermal Management Systems Equipped with Paraffin/expanded Graphite Composite

Modeling and Heat Storage Mechanism of Thermal Management Sy...

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International Conference on Energy engineering, ICEE 2023

作者： Askari, Abdullah Gulfam, Raza Iqbal, Saqib Zhang, Chengbin Kazmi, Mohsin Ali Cheema, Izzat Iqbal School of Energy and Environment Southeast University Jiulonghu Campus Nanjing211189 China School of Materials Science and Engineering Southeast University Jiulonghu Campus Nanjing211189 China Department of Chemical Polymer and Composite Materials Engineering University of Engineering and Technology KSK Campus Lahore39021 Pakistan

ISBN: (纸本)9789819771455

Paraffin waxes are intrinsically reliable latent heat-based thermal reservoirs. However, low thermal transport properties restrict their applications in various systems. In order to overcome these issues, expanded graphite (EG) has been intermingled with paraffin to obtain paraffin/EG composites (PEC) through the chemical impregnation method. PEC has been characterized via differential scanning calorimetry, repeated heating/cooling cycles under thermal shock devices, as well as heat diffusion analysis. Besides, mathematical modeling of heat equations has been proposed, and the heat storage mechanism of thermal management systems has been understood through numerical analysis using ANSYS Fluent. Under energy conservation laws, as-derived phase change heat equation sufficiently describes the simultaneous heat conduction, heat storage, and temperature distributions in thermal management systems. Results show that, after 400 thermal cycles (repeated heating/cooling), heat diffusion of PEC has been slightly reduced, depicting that PEC has great thermal reliability and long life. © The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2024.

关键词： Energy storage Paraffin waxes Thermal analysis

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Advances in Green-Solvent-Processable All-polymer Solar Cells

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Chinese Journal of polymer science 2022年第8期40卷 846-860,I0006页

作者： Qingqing Bai Huiliang Sun Xugang Guo Li Niu Center for Advanced Analytical Science School of Chemistry and Chemical EngineeringGuangzhou UniversityGuangzhou510006China Department of Materials Science and Engineering Southern University of Science and TechnologyShenzhen518055China Institute of Polymer Optoelectronic Materials and Devices State Key Laboratory of Luminescent Materials and DevicesSouth China University of TechnologyGuangzhou510640China

All-polymer solar cells(all-PSCs)have significantly improved long-term stability and mechanical *** power conversion efficiency(PCE)of all-PSCs has been rapidly improved from∼1%to now over∼17%,driven by rational molecular design,blend morphology optimization,and device ***,most all-PSCs are generally processed with halogenated solvents,hazardous for human health and the global *** high-performance all-PSCs with halogen-free solvent processing remains a *** feature article presents recent advances in green-solvent-processable all-PSCs from the material design and morphological control perspective,and further reviews progress in using more environmentally friendly solvents(i.e.,water or alcohol)to achieve genuinely sustainable and environmentally friendly manufacturing ***,we provide an outlook on the challenges and opportunities for large-scale manufacturing of green-solvent-processable all-PSCs.

关键词： All-polymer solar cells Green solvent Molecular design Morphology control

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