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Spherical Magnetic Fe-Alginate Microgels Fabricated by Droplet-Microfluidics Combining with an External Crosslinking Approach and the Study of Their pH Dependent Fe^(3+) Release Behaviors

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Chinese Journal of Polymer Science 2025年第2期43卷 289-302页

作者： Jie Chen Run-Yu Yu ai-Qi Wang Zhe-Yu Zhang Arezoo Ardekani Yuan-Du Hu department of Materials Science and Engineering School of Physics Science and EngineeringBeijing Jiaotong UniversityBeijing100044China Guangdong Provincial Key Laboratory of Technique and Equipment for Macromolecular Advanced Manufacturing South China University of TechnologyGuangzhou510641China State Key Laboratory of Molecular Engineering of polymers Fudan UniversityShanghai200438China department of Mathematics School of Mechanical EngineeringPurdue University585 Purdue MallWest LafayetteIN47907-2088USA

Due to the rapid development and potential applications of iron(Ⅲ)-alginate(Fe-Alg)microgels in biomedical as well as environmental engineering,this study explores the preparation and characterization of spherical Fe-Alg microgels using droplet microfluidics combined with an external ionic crosslinking *** study focused on the role of Fe^(3+)and examined its effects on the physical/chemical properties of microgels under different ionic conditions and reduced or oxidized *** pH-dependent release behavior of Fe^(3+)from these microgels demonstrates their potential biomedical and environmental ***,the microgels can exhibit magnetism simply by utilizing in situ oxidation,which can be further used for targeted drug delivery and magnetic separation technologies.

关键词： Fe-alginate microgels Droplet microfluidics In situ oxidation Magnetism

“Super-heterojunctioned” thermoelectric polymers

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Chinese Chemical Letters 2025年第2期36卷 32-33页

作者： Hanying Li Wee-Liat Ong MOE Key Laboratory of Macromolecular Synthesis and Functionalization International Research Center for X PolymersDepartment of Polymer Science and Engineering Zhejiang University ZJU-UIUC Institute College of Energy Engineering Zhejiang University

Given the increasing demand for distributed electricity, there is a burning desire to harvest electricity from renewable sources using environmentally friendly methods. Thermoelectric (TE) materials can meet this requirement not only because of their ability to convert heat directly into electricity, enabling energy harvesting from waste heat and natural heat resources, but also because more than 60%of the energy is lost as waste heat [1]. The discovery of the TE effect dates back to the 1820s when T. M. Seebeck observed electricity generation at the junction of two conductors with different temperatures. Additionally, when a voltage is applied to TE materials, they can create a temperature difference to enable solid-state cooling (known as the Peltier effect).Therefore, the TE effect promises both sustainable energy solutions and temperature control technologies. Over the past two decades,the urgent demand for powering ubiquitous Internet of Things devices has sparked significant interest in flexible thermoelectrics(F-TEs), which raises an intriguing question:Is the intrinsically flexible polymer an important candidate for state-of-the-art F-TEs applications?

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Enhancing the high-temperature stability of OFETs by inducing D-A stacking in P(NDI2OD-T2) films

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Science China Materials 2025年第1期68卷 117-124页

作者： Xuetao Xiao Wenhao Li Qing Zhou Zeng Wu Xiaochan Zuo Rong Ma Yifei Xu Sichun Wang Yan Zhao Laboratory of Molecular Materials and Devices Department of Materials ScienceFudan UniversityShanghai 200433China State Key Laboratory of Molecular Engineering of polymers and department of Macromolecular Science Fudan UniversityShanghai 200433China

High-temperature stability of organic field-effect transistors(OFETs)is critical to ensure its long-term reliable operation under various environmental *** molecular packing of donor-acceptor(D-A)conjugated polymers is closely related to the electrical performance stability in ***,we choose poly[[N,N′-bis(2-octyldodecyl)-naphthalene-1,4,5,8-bis(dicarboximide)-2,6-diyl]-alt-5,5′-(2,2′-bithiophene)]as a modal system to reveal the relationship between the molecular stacking and electrical stability in high-temperature *** results demonstrate that the films with D-A moieties in alternate stacking have better electrical thermal stability compared to normal donor-donor(D-D)*** D-A stacking configuration alternates donor and acceptor units along the out-of-plane direction,while the D-D stacking involves D-D and A-A stacking *** structural transition from D-D to D-A is captured at a treated temperature range of 225±250°*** to the tighter packing arrangement along theπ-πand lamellar directions,the electron mobility of the D-A stacked films reaches up to 0.23 cm^(2)/V·s,a 50%increase as compared to the D-D stacking ***,the D-A stacked films indicate superior electrical performance stability with mobility retaining 100%at 250°C during high-temperature cycling *** result highlights that the manipulation of conjugated polymer closely stacked structures can significantly enhance the thermal stability and durability of semiconductor devices.

关键词： high-temperature stability D-A stacking P(NDI2OD-T2) electrical properties OFETs

Metal-backboned polymer:concept,advance and perspective

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Science China Materials 2025年第1期68卷 105-109页

作者： Yifeng Zhang Kaiwen Zeng 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

Materials are generally categorized as three main types of metal,non-metal and organic *** them,metal and organic polymers show opposite advantages and *** instance,a metal exhibits both high mechanical strength and electrical conductivity while both low flexibility and solution processibility;an organic polymer exhibits both high flexibility and solution processibility but with both low mechanical strength and electrical conductivity[1–4].Although a lot of efforts are made to synthesize metal/polymer composite materials to partly maintain advantages of each component[5–7],people have never thought that it is possible to achieve the advantages of both metal and polymer by synthesizing novel material with a single component.

关键词： polymer backbone conductivity

Highly Porous Crosslinked Poly(ester-anhydride) Microspheres with High Loading Efficiency

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Chinese Journal of Polymer Science 2015年第9期33卷 1271-1282页

作者： Katarzyna Jaszcz department of Physical Chemistry and technology of polymers Silesian University of Technology

Microparticles with diameter within the range of Dn = 26-38 μm were prepared from functional poly（ester- anhydride）s with different amount of allyl groups in the side chains, using emulsion solvent evaporation technique. Porous structure was obtained as the effect of photocrosslinking of aUyl groups. 2,2-Dimetoxy-2-phenylacetophenone （DMPA）（0.5 wt%-10 wt%） was used as a photoinitiator. The crosslinking was carried out by UV irradiation during the solvent evaporation. Effectiveness of the crosslinking was characterized by the content of insoluble part of samples and it was in the range of 18%-75%. Porosity of microparticles （in the range of 76%-88%） depended on the functionality of poly（ester- anhydride）s and amount of the photoinitiator used. The most porous particles were obtained with use of 0.5 wt% of DMPA. Their flow ability expressed by Carr＇s index was excellent, and their theoretical mass mean aerodynamic diameters were acceptable for use in pulmonary drug delivery. The most porous particles were loaded with p-nitroaniline, theophilline or doxycycline. The loading efficiencies of drugs in porous microspheres were higher compared to nonporous ones. The porosity of loaded microparticles was slightly decreased, however their flow ability was still very good.

关键词： Functional poly(ester-anhydride) Crosslinkable microspheres Allyl groups Photocurring Porous structure.

Carbon Dots-Modified Hollow Mesoporous Photonic Crystal Materials for Sensitivityand Selectivity-Enhanced Sensing of Chloroform Vapor

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Nano-Micro Letters 2025年第4期17卷 381-398页

作者： Junchen Liu Ji Liu Zhipeng Li Liupeng Zhao Tianshuang Wang Xu Yan Fangmeng Liu Xiaomin Li Qin Li Peng Sun Geyu Lu Dongyuan Zhao State Laboratory On Integrated Optoelectronics College of Electronic Science and EngineeringJilin UniversityChangchun 130012People’s Republic of China department of Chemistry and Laboratory of Advanced Materials Shanghai Key Laboratory of Molecular Catalysis and Innovative MaterialsState Key Laboratory of Molecular Engineering of PolymersCollaborative Innovation Center of Chemistry for Energy Materials(2011-iChEM)College of Chemistry and MaterialsFudan UniversityShanghaiPeople’s Republic of China School of Engineering and Built Environment Griffith UniversityNathanQLD 4111Australia

Chloroform and other volatile organic pollutants have garnered widespread attention from the public and researchers,because of their potential harm to the respiratory system,nervous system,skin,and ***,research on chloroform vapor sensing is still in its early stages,primarily due to the lack of specific recognition *** we report a mesoporous photonic crystal sensor incorporating carbon dots-based nanoreceptor(HMSS@CDs-PCs)for enhanced chloroform *** colloidal PC packed with hollow mesoporous silica spheres provides an interconnected ordered macro-meso-hierarchical porous structure,ideal for rapid gas sensing utilizing the photonic bandgap shift as the readout *** as-synthesized CDs with pyridinic-N-oxide functional groups adsorbed in the hollow mesoporous silica spheres are found to not only serve as the chloroform adsorption sites,but also a molecular glue that prevents crack formation in the colloidal *** sensitivity of HMSS@CDs-PCs sensor is 0.79 nm ppm^(-1)and an impressively low limit of detection is 3.22 ppm,which are the best reported values in fast-response chloroform vapor sensor without multi-signal *** positive response time is 7.5 s and the negative response time 9 ***,relatively stable sensing can be maintained within a relative humidity of 20%-85%RH and temperature of 25-55℃.This study demonstrates that HMSS@CDs-PCs sensors have practical application potential in indoor and outdoor chloroform vapor detection.

关键词： Carbon dots Photonic crystal sensors Sensitivity-enhanced sensing Selectivity-enhanced sensing Chloroform vapor sensing

The Application of Cellulose Nanocrystals Modified with Succinic Anhydride under the Microwave Irradiation for Preparation of Polylactic Acid Nanocomposites

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Journal of Renewable Materials 2021年第6期9卷 1127-1142页

作者： Ewa Szefer Agnieszka Leszczyńska Edyta Hebda Krzysztof Pielichowski department of Chemistry and technology of polymers Cracow University of TechnologyKrakow31-155Poland

The aim of this work was to use cellulose nanocrystals that were obtained by hydrolysis in phosphoric acid solution and further modified with succinic anhydride in the microwave field for PLA reinforcement.A series of allbionanocomposites containing unmodified and surface modified cellulose nanocrystals with CNC content in the range of 1–3%_(w.t.) were obtained by melt blending and tested by XRD,SEM,DSC and DMA to investigate the effect of surface esterification of CNCs on the structure,morphology,dynamic mechanical properties of bionanocomposites,as well as phase transitions of PLA in the presence of cellulosic *** investigations showed the highest increase of storage modulus by ca.7%(335 MPa at 25℃)in the glassy state of PLA for 2%_(w.t.)of unmodified ***,addition of 2%_(w.t.)of succinylated CNCs caused the highest increase of the onset of glass transition temperature(by 6.2℃)thus widening the temperature range of biocomposite *** increase of glass transition temperature indicates the strongest interfacial interactions due to improved miscibility of surface modified nanocrystals and thus good dispersion of additive in PLA matrix providing high interface.

关键词： Cellulose nanocrystals CNC whiskers surface modification succinic anhydride PLA polylactic acid nanocomposites

Competitive hydrogen bonding and electrostatic interactions mediated alternating nanoparticles copolymerization

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Nano Research 2025年第2期18卷 789-795页

作者： Jing Tao Chenglin Yi Wenhao Dong Yan Zhang Huibin He Yiqun Yang Shunsheng Ye Qi Wu Xiaoxue Shen Fan Yang Yutao Sang Zhihong Nie State Key Laboratory of Molecular Engineering of polymers Department of Macromolecule ScienceFudan UniversityShanghai 200438China

Nanoparticles self-assembly plays a pivotal role in designing new functional structural *** manipulation of interactions among nanoparticle building blocks is crucial for achieving assemblies with desired structures and *** this work,we assemble binary inorganic nanoparticles into alternating copolymer-like nanostructures by independently regulating hydrogen bonding and electrostatic *** block copolymers grafted on nanoparticles feature oppositely charged groups,where electrostatic attraction drives the linear assembly of nanoparticles into alternate chain *** hydrogen bonding interaction originates from the direct introduction of polyethylene glycol into the systems,serving as hydrogen bond acceptors with the grafted polymer and facilitating the side-by-side assembly of the chain *** two forces were observed to compete with each other during the assembly process,and could be precisely controlled by adjusting the quantities of acetic acid and polyethylene glycol,thus regulating the nanoparticle assembly *** work provides a practical framework for the design of muti-force interactions in hierarchical colloid nanomaterials.

关键词： nanoparticles self-assembly alternating nanoparticle copolymers electrostatic interactions hydrogen bonds block copolymers

Fluorinated poly(p-triphenylene isatin)anion exchange membranes based on hydrophilic hydroxyl side chain modulation for fuel cells

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Journal of Energy Chemistry 2025年第1期100卷 702-709页

作者： Yiman Gu Yanchao Zhang Zhanyu Li Yijia Lei Baozeng Sun Xiaoyu Yu Zhe Wang College of Chemistry and Life Science Changchun University of TechnologyChangchun 130012JilinChina College of Chemical Engineering Changchun University of TechnologyChangchun 130012JilinChina School of Materials Science and Engineering Changchun University of TechnologyChangchun 130012JilinChina Key Laboratory of Advanced Functional Polymer Membrane Materials of Jilin Province Changchun 130012JilinChina

The development of alkaline fuel cells is moving forward at an accelerated pace,and the application of ether-free bonded polymers to anion exchange membranes(AEMs)has been widely ***,the question of the“trade-off”between AEM ionic conductivity and dimensional stability remains *** strategy of inducing microphase separation to improve the performance of AEM has attracted much attention recently,but the design of optimal molecular structures is still being ***,this work introduced different ratios of 3-bromo-1,1,1-trifluoroacetone(x=40,50,and 60)into the main chain of poly(p-terphenylene isatin).Because fluorinated groups have excellent hydrophobicity,hydrophilic hydroxyl-containing side chains are introduced to jointly adjust the formation of phase separation *** results show that PTI-PTF_(50)-NOH AEM with the appropriate fluorinated group ratio has the best ionic conductivity and alkali stability under the combined effect of *** has an ionic conductivity of 133.83 mS cm^(-1)at 80°*** addition,the OH-conductivity remains at 89%of the initial value at 80°C and 3 M KOH for 1056 h of *** cell polarization curve based on PTI-PTF_(50)-NOH shows a power density of 734.76 mW cm^(-2)at a current density of 1807.7 mA cm^(-2).

关键词： Anion exchange membranes Poly(p-terphenylene isatin) Hydrophilic-hydrophobic phase separation Fluorinated group