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Aggregate 2024年第6期5卷 435-446页

作者： Youling He Junqian Zhang Chaoyang Ma Junkai Liu Jingjing Guo Ting Han Rongrong Hu Bing Shi Li Ben Zhong Tang Center for AIE Research Shenzhen Key Laboratory of Polymer Science and TechnologyGuangdong Research Center for Interfacial Engineering of Functional MaterialsGuangdong Provincial Key Laboratory of New Energy Materials Service SafetyCollege of Materials Science and EngineeringShenzhen UniversityShenzhenGuangdongChina College of Physics and Optoelectronic Engineering Shenzhen UniversityShenzhenGuangdongChina State Key Laboratory of Luminescent Materials and Devices Guangdong Provincial Key Laboratory of Luminescence from Molecular AggregatesSouth China University of TechnologyGuangzhouGuangdongChina Key Laboratory of New Lithium-Ion Battery and Mesoporous Material College of Chemistry and Environmental EngineeringShenzhen UniversityShenzhenGuangdongChina Department of Chemistry Hong Kong Branch of Chinese National Engineering Research Center for Tissue Restoration and ReconstructionThe Hong Kong University of Science and TechnologyClear Water BayKowloonHong KongChina School of Chemistry Chemical Engineering and BiotechnologyNanyang Technological University21 Nanyang LinkNanyangSingapore School of Science and Engineering Shenzhen Institute of Aggregate Science and TechnologyThe Chinese University of Hong KongShenzhen(CUHK-Shenzhen)ShenzhenGuangdongChina

The multifaceted regulation of the chiroptical properties and self-assembly behaviors of chiral fluorescent polymers is of great significance yet remains challenging to ***,a series of novel salen-based chiral fluorescent polymers with aggregation-induced emission and varied substitution manners were facilely and efficiently *** factors were systematically investigated on the chiroptical properties and self-assembly performance of these polymers,which include molecular structures,solvent environments,metal coordination,and liquid crystal(LC)*** change in the solvent composition can lead to diverse assembly morphologies of all these chiral polymers,from single-handed helical fibers,helical toroids or loops,to spherical structures,consequently leading to an aggregation-reduced circular dichroism(CD)*** polymers bearing salen units show highly selective and reversible coordination with Zn^(2+)and can also induce multiple responses in the absorption,luminescence,CD,and circularly polarized luminescence(CPL)of these chiral fluorescent polymers via a coordination-and dissociation-initiated self-assembly ***,a small amount of the chiral fluorescent polymer in can induce achiral nematic 4-cyano-4′-n-pentylbiphenyl(5CB)to form ordered chiral nematic LC phase with significant improvement in their CD and CPL *** absolute absorption and luminescent dissymmetry factors of the resulting supramolecular assemblies can reach the order of 10^(−1).

关键词： aggregation-induced emission chirality circularly polarized luminescence fluorescent polymers selfassembly

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Application of nanofluids in heat exchangers - A state-of-the-art review

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International Journal of Thermofluids 2024年 24卷

作者： Porgar, Sajjad Huminic, Gabriela Huminic, Angel Najibolashrafi, Roznaz Salehfekr, Somayeh Department of Chemical and Polymer Engineering South Tehran Branch Islamic Azad University Tehran Iran Transilvania University of Brasov Mechanical Engineering Department 29 Bulevardul Eroilor Brasov500036 Romania Department of Industrial Engineering Science and Research Branch Islamic Azad University Tehran Iran Department of Chemical Engineering Shahryar Branch Islamic Azad University Shahriar Iran

Heat exchangers are used extensively in a variety of industrial applications, such as power plants, air conditioning, refrigeration, the oil and gas, and petrochemical sectors. Air-cooled exchangers, plate heat exchangers, and tube heat exchangers are a few of its commonly utilized varieties. The usage of various nanofluid types in heat exchangers is covered in detail in the first section of the article, along with an explanation of the guidelines that govern the research. In the second part, the preparation methods of nanofluids are mentioned. The results of the researches demonstrated that temperature, particle count, type of base fluid, and nanofluid flow through the heat exchanger are the primary factors in enhancing the thermal characteristics of nanofluid;numerous researchers have concentrated on the two-stage approach. Finally, nanofluids were used in different heat exchangers and the results were summarized. © 2024 The Author(s)

关键词： Air conditioning

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MXene@c-MWCNT Adhesive Silica Nanofiber Membranes Enhancing Electromagnetic Interference Shielding and Thermal Insulation Performance in Extreme Environments

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Nano-Micro Letters 2024年第10期16卷 82-98页

作者： Ziyuan Han Yutao Niu Xuetao Shi Duo Pan Hu Liu Hua Qiu Weihua Chen Ben Bin Xu Zeinhom MEl-Bahy Hua Hou Eman Ramadan Elsharkawy Mohammed AAmin Chuntai Liu Zhanhu Guo Key Laboratory of Materials Processing and Mold(Zhengzhou University) Ministry of EducationNational Engineering Research Center for Advanced Polymer Processing TechnologyZhengzhou UniversityZhengzhou 450002People's Republic of China School of Nano-Tech and Nano-Bionics University of Science and Technology of ChinaHefei 230026People's Republic of China Key Laboratory of Multifunctional Nanomaterials and Smart Systems Advanced Materials DivisionSuzhou Institute of Nano-Tech and Nano-BionicsChinese Academy of SciencesSuzhou 215123People's Republic of China Shaanxi Key Laboratory of Macromolecular Science and Technology School of Chemistry and Chemical EngineeringNorthwestern Polytechnical UniversityXi'an 710072People's Republic of China College of Chemistry&Green Catalysis Center Zhengzhou UniversityZhengzhou 450001People's Republic of China Mechanical and Construction Engineering Faculty of Engineering and EnvironmentNorthumbria UniversityNewcastle Upon Tyne NE18UK Department of Chemistry Faculty of ScienceAl-Azhar UniversityNasr City 11884CairoEgypt Department of Chemistry Faculty of ScienceNorthern Border UniversityArarSaudi Arabia Department of Chemistry College of ScienceTaif UniversityP.O.Box 1109921944 TaifSaudi Arabia

A lightweight flexible thermally stable composite is fabricated by com-bining silica nanofiber membranes(SNM)with MXene@c-MWCNT hybrid *** flexible SNM with outstanding thermal insulation are prepared from tetraethyl orthosilicate hydrolysis and condensation by electrospinning and high-temperature calcination;the MXene@c-MWCNT_(x:y)films are prepared by vacuum filtration *** particular,the SNM and MXene@c-MWCNT_(6:4)as one unit layer(SMC_(1))are bonded together with 5 wt%polyvinyl alcohol(PVA)solution,which exhibits low thermal conductivity(0.066 W m^(-1)K^(-1))and good electromagnetic interference(EMI)shielding performance(average EMI SE_(T),37.8 dB).With the increase in func-tional unit layer,the overall thermal insulation performance of the whole composite film(SMC_(x))remains stable,and EMI shielding performance is greatly improved,especially for SMC_(3)with three unit layers,the average EMI SET is as high as 55.4 *** addition,the organic combination of rigid SNM and tough MXene@c-MWCNT_(6:4)makes SMC_(x)exhibit good mechanical tensile ***,SMC_(x)exhibit stable EMI shielding and excellent thermal insulation even in extreme heat and cold ***,this work provides a novel design idea and important reference value for EMI shielding and thermal insulation components used in extreme environmental protection equipment in the future.

关键词： SiO_(2)nanofiber membranes MXene@c-MWCNT Composite film Thermal insulation Electromagnetic interference shielding

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A Range of Sustainable Lignin-Derived Phosphonamides: Achieving the Excellent Equilibrium between Crystallization, Mechanical Properties and Flame Retardancy of Biodegradable Polylactide

SSRN

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SSRN 2025年

作者： Li, Dongsheng Jia, Zihan Wang, Lizheng Li, Gengchun Usman, Humza Sang, Lin Wei, Zhiyong State Key Laboratory of Fine Chemicals Liaoning Key Laboratory of Polymer Science and Engineering Department of Polymer Science and Engineering School of Chemical Engineering Dalian University of Technology Dalian116024 China Department of Materials Science and Engineering College of Transportation Engineering Dalian Maritime University Dalian116024 China School of Materials Science and Engineering Dalian University of Technology Dalian116024 China Ningbo Institute Dalian University of Technology Ningbo315016 China

Against the background of practical application requirements and sustainable development, achieving an equilibrium between crystallization, mechanical properties and flame retardancy of polylactide (PLA) with a green strategy has been a challenge. Additionally, previous work lacked to explore the structure-activity relationship. Herein, four lignin-derived phosphonamides containing P-C and P-O-C bonds were synthesized and used to fabricate PLA composites. The crystallization behaviors, mechanical properties and flame retardancy of PLA composites were systematically compared, and the influence of phosphonamides structure on the flame-retardant mechanism was emphasized. DSC results showed that these phosphonamides act as nucleating agents as they significantly improved the crystallization capacity of PLA. Interestingly, phosphonamides containing P-C bonds are more effective than P-O-C bonds in accelerating the crystallization rate, increasing the nucleation density and reducing the crystal size. Beyond that, PLA composites maintain the outstanding mechanical properties, phosphonamides containing P-O-C bonds exhibited significant improvement. PLA composites with 6 wt% phosphonamides fulfilled UL-94 V-0 ratings and significantly enhanced LOI values. Phosphonamides containing P-C bonds endow PLA higher flame-retardant efficiency, while containing P-O-C bonds enable PLA higher LOI values. Flame retardant mechanism analysis suggests that phosphonamides with P-C bonds primarily act in the vapor phase, while containing P-O-C bonds act in the condensed phase. The flame retardancy of PLA composites is realized by the synergistic effects of drop away, free radical trapping, dilutive influence, and residual char. In summary, this research provides a sustainable strategy for the fabrication of PLA composites with outstanding overall performance, which exhibits a broad prospect in industry. © 2025, The Authors. All rights reserved.

关键词： Flame retardants

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Asymmetric side-chain engineering in semiconducting polymers: a platform for greener processing and post-functionalization of organic electronics

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polymer Chemistry 2022年第5期14卷 562-572页

作者： Mooney, Madison Nyayachavadi, Audithya Awada, Angela Iakovidis, Ekaterini Wang, Yunfei Chen, Mei-Nung Liu, Yuzi Xu, Jie Chiu, Yu-Cheng Gu, Xiaodan Rondeau-Gagné, Simon Department of Chemistry and Biochemistry University of Windsor ONN9B 3P4 Canada School of Polymer Science and Engineering The University of Southern Mississippi HattiesburgMS39406 United States Department of Chemical Engineering National Taiwan University of Science and Technology Taipei106 Taiwan Nanoscience and Technology Division Argonne National Laboratory LemontIL United States

Organic semiconducting polymers are a powerful platform for the design of next-generation technologies due to their excellent optoelectronic properties and solution processability, allowing access to low-cost and scalable manufacturing techniques such as spin-coating, slot-die coating and roll-to-roll printing. However, their extended π-conjugation results in low solubility, requiring the use of toxic halogenated solvents to generate thin films and devices. Furthermore, accessible post-functionalization of semiconductors toward the development of multifunctional devices and sensors remains a challenge due to limited solid-state chemistry for alkyl side chains. In this work, an asymmetric side-chain engineering approach was used to introduce terminal hydroxyl moieties alongside traditional solubilizing branched alkyl chains into an isoindigo-based polymer. The hydroxyl moieties led to significantly improved processability in alcohol-based solvents without sacrificing electronic performance in thin film organic field-effect transistors. Solid state morphologies of the thin films processed from both alcohol-based and traditional halogenated solvents were further characterized using atomic force microscopy and grazing incidence wide angle X-ray scattering. Additionally, Cryo-EM was utilized in order to characterize the role of asymmetric side-chain functionality in solution state aggregation. The versatility of this design was further probed using fluorescein isothiocyanate to directly functionalize the asymmetric polymer in thin film. This facile solid-state post-functionalization further demonstrates asymmetric side-chain engineering to be a viable approach toward the development of sustainably manufactured multifunctional electronics. © 2023 The Royal Society of Chemistry.

关键词： Thin films

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Intelligent Textiles for Visual and Smart Interaction

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Advanced Fiber Materials 2024年第4期6卷 946-948页

作者： Yuanyuan Zheng Zhigang Chen Huisheng Peng State Key Laboratory of Molecular Engineering of Polymers Department of Macromolecular ScienceInstitute of Fiber Materials and Devicesand Laboratory of Advanced MaterialsFudan UniversityShanghai 200438China State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of Materials Science and EngineeringDonghua UniversityShanghai 201620China

The fiberization and integration of electronic devices into textiles represent an important strategy to design wearable and comfortable intelligent ***,the function realization of existing intelligent textiles often depends on complex and rigid silicon-based computation components,which have posed significant challenges in terms of integration,energy consumption and user *** has spurred the need for a paradigm shift towards more seamless and efficient *** advent of chipless interactive textile electronics presents a promising pathway for overcoming these challenges and unlocking new possibilities in wearable technology.

关键词： Intelligent textile Visual interaction Chipless fibre Fibre electronics

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Natural antimicrobial properties of liquid smoke derived from cocoa pod shells in meatball preservation

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South African Journal of chemical engineering 2023年 46卷 106-111页

作者： Desvita, Hera Faisal, M. Mahidin, Mahidin Suhendrayatna Doctoral Program Post Graduate Program Universitas Syiah Kuala Indonesia Research Center for Chemistry National Research and Innovation Agency B.J. Habibie Science and Techno Park Serpong Banten South Tangerang 15314 Indonesia Chemical Engineering Department Faculty of Engineering Universitas Syiah Kuala Indonesia Halal Research Center Universitas Syiah Kuala Indonesia

The liquid smoke, which is produced by pyrolyzing wood materials containing cellulose, hemicellulose, and lignin, can be used to preserve food. Phenolic, acetic, and carbonyl compounds found in liquid smoke can serve as a natural preservative. This study aimed to determine meatball preservation ability of liquid smoke from cocoa pod shells. Specifically, cocoa pod shells were converted to liquid smoke using slow pyrolysis at three different temperatures, 300 °C, 340 °C and 380 °C. Prior to its use, liquid smoke was purified using distillation at 190 °C. Liquid smoke at concentrations of 0.5%–3.0% was then used to preserve meatballs using an immersion method. Total volatile base-nitrogen (TVB-N), total plate count (TPC), and most probable number (MPN) analyses were used to evaluate preservation performance of liquid smoke. The statistical methods for MPN using one-way ANOVA followed by Tukey's tests. The SNI (Standar Nasional Indonesia) threshold to test whether meatballs remained fresh (TVB-N <20 mg N/g). TPC test results indicated that beef meatballs stay fresh at room temperature for 42 h or 48 h of storage using 0.5% or 1%–3% liquid smoke concentrations, respectively. Based on MPN tests showed meatballs could last for 48 h for all samples. Liquid smoke produced from cocoa pod shells can be used as a natural preservative for beef meatballs;however, liquid smoke concentrations influence the maximum preservation period for meatballs. © 2023 The Author(s)

关键词： Cocoa pod shells Liquid smoke MPN Pyrolysis Total plate count Total volatile base-nitrogen

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A-DA’D-A Type Pentacyclic Small Molecule Acceptors to Exceed 16.5%Efficiency by Heteroatom Effect at the Outer Side Chain

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Chinese Journal of Chemistry 2023年第15期41卷 1815-1822页

作者： Shaofeng Zhu Changzhou Shi Qingya Wei Can Zhu Jie Ren Jianghua Li Lei Meng Yongfang Li Jun Yuan Yingping Zou State Key Laboratory of Powder Metallurgy College of Chemistry and Chemical EngineeringCentral South UniversityChangshaHunan 410083China Beiing National Laboratory for Molecular Sciences CAS Key Laboratory of Organic SolidsInstitute of ChemistryChinese Academy of SciencesBeijing 100190China. MOE Key Laboratory of Macromolecular Synthesis and Functionalization International Research Center for X PolymersDepartment of Polymer Science and EngineeringZhejiang UniversityHangzhouZhejiang 310027China

Comprehensive Summary In this work,we adopt a“heteroatom side-chains”modification strategy to modify the thiophene units in A-DA'D-A(acceptor-donor-acceptor’-donor-acceptor)type pentacyclic SMAs(small molecule acceptors),that is,introducing branched alkyl chain at theβ-position of thiophene instead of straight alkyl chain,and then introducing oxygen atom at the third-position on the basis of branched *** new pentacyclic SMAs(BZ4F-EH and BZ4F-OEH)were synthesized,and the influence of the heteroatom side-chains on photoelectric properties of A-DA'D-A type pentacyclic SMAs was systematically *** with our previously reported BZ4F(Y26),BZ4F-EH shows slightly blue-shifted absorption,while BZ4F-OEH has obvious red-shifted *** a result,BZ4F-OEH-based binary device achieved a high power conversion efficiency(PCE)of 16.56%with a fill factor(FF)of 79.3%,which is the highest efficiency of pentacyclic SMAs to date.

关键词： Organic solar cells Small molecule acceptors A-DA'D-A type structure Heteroatom side chains Substituent effects

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Localized delivery of FTY-720 from 3D printed cell-laden gelatin/silk fibroin composite scaffolds for enhanced vascularized bone regeneration

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Smart Materials in Medicine 2022年 3卷 217-229页

作者： Yang, Jin Deng, Changxu Shafiq, Muhammad Li, Zhihui Zhang, Qianqian Du, Haibo Li, Shikai Zhou, Xiaojun He, Chuanglong Shanghai Engineering Research Center of Nano-Biomaterials and Regenerative Medicine College of Chemistry Chemical Engineering and Biotechnology Donghua University 201620 China State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of Materials Science and Engineering Donghua University Shanghai201620 China Department of Orthopedics Shanghai Tenth People's Hospital Tongji University School of Medicine 301 Middle Yanchang Road Shanghai200072 China

Three-dimensional (3D) printing can construct products with accurate complex architecture. Engineered bone tissues that can promote vascularization and regulate directed differentiation of bone marrow-derived mesenchymal stem cells (BMSCs) are considered as an ideal substitute the healing of bone for bone defects treatment. Herein, we fabricated a 3D printed BMSCs-laden scaffold using methacrylated gelatin and methacrylated silk fibroin (GelMA/SFMA) based bioinks along with localized sustained release of a small molecule drug fingolimod (FTY-720) for the synergistic interactions of vascularization and osteogenesis during bone repair. The GelMA/SFMA bioink showed significant advantages due to their tunable rheology, rapid thermal crosslinking, and improved shape fidelity following bioprinting. The in vitro experiments demonstrated that high cell viability of cells-laden constructs, while FTY-720-containing scaffolds significantly promoted migration and induced tube-like structure formation of human umbilical vein endothelial cells (HUVECs) as well as expressed high osteogenic-related genes expression of BMSCs. The implantation in a critical-size rat cranial defect model further revealed that FTY-720-loaded scaffolds significantly promoted vascularization and bone regeneration. Furthermore, scaffolds carrying BMSCs and FTY-720 were more osteogenic in vivo than scaffolds carrying BMSCs alone. Therefore, the constructed BMSCs-laden and FTY-720-loaded GelMA/SFMA scaffolds would be an ideal candidate with required structure and desired function for vascularization of bone regeneration. © 2022 The Authors

关键词： Controlled drug delivery

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Hybrid 3D/2D NH 2 -UIO-66/h-BN nanostructures for smart epoxy coatings with enhanced anti-corrosion and mechanical performance

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Journal of Materials Research and Technology 2025年 37卷 2084-2104页

作者： Ali Dashan Fatemeh Norouzi Mohammad Ramezanzadeh Bahram Ramezanzadeh Department of Surface Coatings and Corrosion Institute for Color Science and Technology P.O. Box 16765-654 Tehran Iran Department of Polymer School of Chemical Engineering College of Engineering University of Tehran Tehran Iran Iran Polymer and Petrochemical Institute P.O. Box 14965-115 Tehran Iran

This study introduces an innovative epoxy coating system enhanced with 2D hexagonal boron nitride (h-BN) nanosheets, commonly called white graphene. These nanosheets have been surface-modified with APTES and UIO-66-NH 2 (NH 2 -UIO) particles to improve nanoparticle dispersion within the epoxy matrix. The NH 2 -UIO particles also allow for incorporating green mono-sodium glutamate-zinc inhibitors within their porosity, providing both active corrosion protection and enhanced mechanical properties. The structure, composition, and surface chemistry of the nanomaterials were characterized using XRD, FT-IR, TGA, XPS, BET, TEM, and FE-SEM/EDAX-Mapping techniques. The anti-corrosion performance was assessed through EIS, pull-off adhesion, cathodic disbondment, and ICP analysis. Thermo-mechanical behavior was evaluated using DMTA, tensile testing, and FE-SEM of the fracture surfaces. EIS tests revealed that the nanoparticle-filled coatings exhibited active corrosion protection. The scratched coating exhibited an impedance of 128.22 kΩ cm 2 after 3 h immersion, an improvement of 104.8 % compared to the control's 62.59 kΩ cm 2 , highlighting its efficient active protection. Over a longer period, the nanoparticle-filled coatings maintained a resistance of 4.73 GΩ cm 2 after 70 days of exposure to saline media, significantly outperforming the control sample, which displayed a resistance of just 0.011 GΩ cm 2 . Adhesion tests, including pull-off and cathodic disbondment, showed enhanced adhesion in the modified coatings, with a 77 % reduction in adhesion loss and 42 % less disbondment compared to uninhibited samples. Additionally, the incorporation of nanoparticles resulted in substantial improvements in mechanical performance, such as increased hardness, Young's modulus, tensile strength, and higher cross-link density.

关键词： Hexagonal boron nitride UIO-66-NH 2 Epoxy coating Corrosion Zr-MOF

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