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Hollow-structured elastic aerogel fibers enabling simultaneous EMI shielding, infrared stealth, and thermal management

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JOURNAL OF COLLOID AND INTERFACE SCIENCE 2025年 694卷

作者： sui, xuwen Lian, Qingsong Huo, Qiangqiang Huang, Shaoliang Xue, Fuping Liang, Chaobo North Univ China Coll Mat Sci & Engn Key Lab Funct Nanocomposites Shanxi Prov Taiyuan 030051 Peoples R China

Electromagnetic interference (EMI) shielding materials that also possess thermal management capabilities are crucial for safeguarding sensitive information against interception or disruption in electronic countermeasure applications. Furthermore, these materials are adept at maintaining a stable internal temperature within their structural framework, even under the most severe cold conditions. In this work, we fabricated elastic hollow porous polyurethane (HPU) fibers incorporating silver-coated copper nanosheets (Cu@Ag NS) as fillers, which exhibit low mid-infrared emissivity and exceptional electrical conductivity. These fibers were subsequently woven into HPU textile using a shuttle weaving technique, resulting in the textile with superior EMI shielding and excellent thermal management properties. The results indicate that the HPU textile can attain an adjustable EMI shielding effectiveness (SE) ranging from 21.11 to 57.53 dB, depending on the angle between HPU textile and the electric field of the incident electromagnetic wave. The HPU textile exhibits a thermal conductivity of 0.06 Wm(-1)K(-1), offering excellent thermal insulation. Moreover, it demonstrates an elongation of 490 %, underscoring its exceptional flexibility. These outstanding EMI shielding capabilities, combined with its adaptable thermal response and superior thermal management properties, make the HPU textile highly appropriate for use in wearable devices and architectural applications.

关键词： Multifunctional polymer textile Electromagnetic interference shielding Multiple thermal response Wearable textile Joule heating

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Stable self-crosslinking phase change composites with vertically aligned boron nitride for high thermal conductivity thermal interface materials

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CERAMICS INTERNATIONAL 2024年第11期50卷 19829-19837页

作者： Liu, Chunlei Duan, Xiaoyuan Zhang, Wei Huo, Qianqiang sui, xuwen Liu, Yaqing Liang, Chaobo North Univ China Coll Mat Sci & Engn Key Lab Funct Nanocomposites Shanxi Prov Taiyuan 030051 Peoples R China Northwestern Polytech Univ Sch Chem & Chem Engn Shaanxi Key Lab Macromol Sci & Technol Xian 710072 Peoples R China

Thermal interface materials (TIMs) must have a high through-plane thermal conductivity in order to efficiently transfer the heat generated by electronic components to heat sinks. Nevertheless, the achievement of high through-plane thermal conductivity is still a great challenge due to the inadequate thermal conductivity network as well as the lack of thermal response from the polymer matrix. Herein, we have developed a solid-solid phase change polymer matrix achieved through self-crosslinking polyethylene glycol (SCPEG). Subsequently, highperformance TIMs based on the SCPEG matrix and vertically aligned boron nitride (BN) nanosheets are obtained by bidirectional freezing, hot pressing, and longitudinal slicing. The prepared BN/SCPEG composites (BN content of 80 vol%) with a vertically oriented network achieved a through-plane thermal conductivity of 23.03 W m-1 K-1. More importantly, the vertically aligned BN nanosheets improve the thermal conductivity of composites, while the SCPEG matrix can reduce the hardness of composites by absorbing the heat, thus decreasing the contact thermal resistance.

关键词： Thermal interface materials Solid-solid phase change polymer matrix Self-crosslinking polyethylene glycol Vertically aligned boron nitride nanosheets

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基于玻璃纤维织物的固-固相变树脂复合材料制备及电磁屏蔽性能

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工程塑料应用 2024年第9期52卷 35-40页

作者：梁超博霍强强隋绪文中北大学材料科学与工程学院太原030051

具备灵活热响应的电磁干扰(EMI)屏蔽复合材料是电磁防护、建筑工程、电子兼容等领域的理想候选材料之一。为制得该类EMI屏蔽复合材料,首先将异氰酸丙基三乙氧基硅烷(IPTS)与聚乙二醇(PEG)反应,获得具有高活性硅醇基团可自交联的柔韧固-... 详细信息

具备灵活热响应的电磁干扰(EMI)屏蔽复合材料是电磁防护、建筑工程、电子兼容等领域的理想候选材料之一。为制得该类EMI屏蔽复合材料,首先将异氰酸丙基三乙氧基硅烷(IPTS)与聚乙二醇(PEG)反应,获得具有高活性硅醇基团可自交联的柔韧固-固相变树脂(SPCR)基体,随后,通过SPCR封装被银纳米线(AgNWs)修饰的玻璃纤维织物(GFF)制备得到AgNWs/GFF/SPCR复合材料。测试了SPCR的结构和热稳定性,研究了AgNWs/GFF层数对复合材料电磁屏蔽性能的影响,最后测试了复合材料的热响应性能。结果表明,SPCR在保留原始PEG相变特性的同时具有优异的形状稳定能力,从而避免被泄漏。4层AgNWs/GFF组成的复合材料在2.8 mm厚度下的EMI屏蔽效能(SE)约为73 dB。电磁波吸收效能(SEA)随着EMI SE的增加呈现出递增的趋势,而电磁波反射效能(SER)在6~18 dB范围内波动。同时,反射系数(R)远大于吸收系数(A),AgNWs/GFF/SPCR复合材料表现出明显的反射主导屏蔽机制。此外,AgNWs/GFF/SPCR复合材料在升温和降温过程均表现出明显的温度滞后现象。因此,AgNWs/GFF/SPCR复合材料在电磁辐射防护和设备热管理方面具有广阔的前景。

关键词：固-固相变树脂聚乙二醇银纳米线玻璃纤维织物电磁屏蔽

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A new species of the genus Lindaspio Blake & Maciolek, 1992 (Annelida, Spionidae) from a cold seep near Hainan Island, China

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ZOOKEYS 2023年第1153期1153卷 105-112页

作者： sui, Jixing Dong, Dong Wu, xuwen Li, Xinzheng Chinese Acad Sci Inst Oceanol Lab Marine Organism Taxon & Phylogeny Qingdao Key Lab Marine Biodivers & Conservat Qingdao 266071 Peoples R China Pilot Natl Lab Marine Sci & Technol Qingdao Lab Marine Biol & Biotechnol Qingdao Peoples R China Univ Chinese Acad Sci Beijing Peoples R China

A new species of the spionid genus Lindaspio Blake & Maciolek, 1992 was collected from a cold seep near the Hainan Island at a depth of 1758 m. Morphologically, Lindaspio polybranchiata sp. nov. differs from the congeners in having a narrow, folded caruncle and more neuropodial branchiae (from chaetiger 20). The 18S, COI, and 16S sequences of the new species have been submitted to GenBank. It is the first record of the genus Lindaspio from Chinese waters. A key to all species of Lindaspio is given.

关键词： Cold seep Lindaspio polybranchiata sp nov Polychaeta taxonomy

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Blended Tea Ameliorates T2DM via Modulation of Gut Microflora

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PLANT FOODS FOR HUMAN NUTRITION 2024年第4期79卷 851-859页

作者： Liu, sui Dai, Xinyue Zhao, Jinqi Zhang, xuwen Zhu, Mingzhi Wang, Kunbo Fu, Donghe Hunan Agr Univ Key Lab Tea Sci Minist Educ Changsha 410128 Hunan Peoples R China Hunan Agr Univ Natl Res Ctr Engn Technol Utilizat Funct Ingredien Changsha 410128 Hunan Peoples R China Hunan Agr Univ Coinnovat Ctr Educ Minist Utilizat Bot Funct Ingredients Changsha 410128 Hunan Peoples R China Hunan Agr Univ Key Lab Evaluat & Utilizat Gene Resources Hort Cro Minist Agr & Rural Affairs China Changsha 410128 Hunan Peoples R China

Increasing evidences suggest that type 2 diabetes mellitus (T2DM) is closely related to gut microflora dysbiosis, which can be improved by dietary intervention. Four natural plant products, including Cyclocarya paliurus, Fu brick tea, Ampelopsis grossedentata, and Lithocarpus litseifolius, were blended to form a blended tea product for obtaining the better flavor. The blended tea was also expected to have excellent pharmacological activity. Therefore, the ameliorative effect of blended tea on T2DM and underlying mechanisms were studied in this study. The results showed that the blended tea extract effectively attenuated the symptoms of glucose and lipid metabolism-related disorders in T2DM mice fed by high-fat and high-sucrose diet. Furthermore, blended tea extract intervention significantly attenuated gut microbiota dysbiosis, the abundance of bacteria such as Bacteroidetes and Firmicutes, which aid in the hydrolysis and utilization of carbohydrates, significantly increased, while the abundance of pathogenic bacteria such as Proteobacteria significantly decreased. Certain core microorganisms involved in energy metabolism, including Ruminococcaceae_UCG-005, Butyricimonas, Roseburia, Oscillibacter, [Eubacterium]_nodatum_group, Muribaculaceae, Prevotellaceae UCG 001, were also found to be improved by blended tea extract. Collectively, our results demonstrated that the blended tea may ameliorate T2DM through modulation of gut microflora. The blended tea may serve as novel functional drink for the treatment of T2DM and dysbiosis of gut microbiota.

关键词： Blended tea(1) T2DM(2) Gut microflora(3) Gut Microflora dysbiosis(4)

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Stratum Corneum-Inspired Zwitterionic Hydrogels with Intrinsic Water Retention and Anti-Freezing Properties for Intelligent Flexible Sensors

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ADVANCED FUNCTIONAL MATERIALS 2025年第0期

作者： Wu, Meng Qiao, Chenyu sui, Peng-Fei Luo, Jing-Li Li, Zuoli Cao, Yi Pei, Renjun Peng, xuwen Zeng, Hongbo Chinese Acad Sci Suzhou Inst Nanotech & Nanobion CAS Key Lab Nanobio Interface Suzhou 215123 Peoples R China Univ Alberta Dept Chem & Mat Engn Edmonton AB T6G 1H9 Canada Tsinghua Univ Dept Chem Engn Beijing 10084 Peoples R China

Hydrogels, which mimic the properties of natural tissues, are essential for flexible electronics in human-machine interfaces (HMIs). However, traditional hydrogels suffer from dehydration, compromising stability and functionality. To address this issue, a stratum corneum-inspired, water-retaining hydrogel is developed using hygroscopic polymers and bound water. Three types of hydrophilic monomers (non-ionic, mono-ionic, and zwitterionic) are explored, with polyzwitterions, particularly N,N-dimethyl (acrylamidopropyl) ammonium propane sulfonate (DMAAPS), forming a quasi-hydrogel that retains the softness and flexibility of conventional hydrogels. Water acts as a plasticizer, enhancing polymer chain mobility and reducing stiffness. The DMAAPS hydrogel maintains 100% weight retention under specific humidity conditions and shows skin-like softness across a wide humidity range. The Young's modulus increases from 54 to 118 kPa as relative humidity decreases from 80% to 40%. The absence of free water confers intrinsic anti-freezing properties. A triple crosslinking mechanism and conductive polymers endow the hydrogel with stretchability (> 2000%), toughness, elasticity, self-healing, and stable sensing capabilities. The hydrogel functions as an excellent flexible sensor for real-time, sensitive detection of human motion and physiological signals. An intelligent handwriting recognition platform with high accuracy is also established using double-channel signal collection and machine learning algorithms, offering insights for next-generation durable, biomimetic, and smart HMIs.

关键词： anti-freezing flexible sensors self-healing stratum corneum-inspired materials water retention wearable electronics Zwitterionic hydrogels

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Diketopyrrolopyrrole-based conjugated polymers synthesized by direct arylation polycondensation for anisole-processed high mobility organic thin-film transistors

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JOURNAL OF MATERIALS CHEMISTRY C 2022年第7期10卷 2616-2622页

作者： sui, Ying Wang, Zhongli Bai, Junhua Shi, Yibo Zhang, xuwen Deng, Yunfeng Han, Yang Geng, Yanhou Tianjin Univ Sch Mat Sci & Engn Tianjin 300072 Peoples R China Tianjin Univ Tianjin Key Lab Mol Optoelectmn Sci Tianjin 300072 Peoples R China Tianjin Chengjian Univ Sch Mat Sci & Engn Tianjin 300384 Peoples R China Tianjin Univ Joint Sch Natl Univ Singapore & Tianjin Univ Int Campus Fuzhou 350207 Peoples R China

Two conjugated polymers (CPs) Fu-F and Fu-Cl that are soluble in a green solvent anisole were successfully synthesized via direct arylation polycondensation (DArP) using a furan-flanked diketopyrrolopyrrole (DPP) derivative (FDPP-Br) as the C-Br monomer and (E)-1,2-bis(3,4-difluorothien-2-yl)ethene (4FTVT) or (E)-1,2-bis(3,4-dichlorothien-2-yl)ethene (4ClTVT) as the C-H monomer. With anisole as the processing solvent and polyethylenimine ethoxylated (PEIE) as the electrode modification layer, n-type organic thin-film transistors (OTFTs) of the polymers were fabricated via bar-coating. The electron mobility (mu(e)) of the devices based on Fu-Cl was only in the magnitude of 10(-2) cm(2) V-1 s(-1), owing to the unfavoured fine granular film morphology. In contrast, Fu-F films showed fibre-like morphology with the polymer chains aligned along the bar-coating direction, which is favourable for the charge transport in OTFTs. Therefore, Fu-F delivered much better device performance with the mu(e) of up to 2.79 cm(2) V-1 s(-1). Our study demonstrates that green solvent processed high mobility CPs can be synthesized by DArP, an emerging eco-friendly protocol for the synthesis of CPs.

关键词： Conjugated polymers

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Conjugated Polymers from Direct Arylation Polycondensation of 3,4-Difluorothiophene-Substituted Aryls: Synthesis and Properties

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MACROMOLECULAR RAPID COMMUNICATIONS 2023年第23期44卷 e2300393-e2300393页

作者： sui, Ying Zhang, xuwen Xu, Chenhui Shi, Yibo Deng, Yunfeng Han, Yang Geng, Yanhou Tianjin Chengjian Univ Sch Mat Sci & Engn Tianjin 300384 Peoples R China Tianjin Univ Sch Mat Sci & Engn Tianjin 300072 Peoples R China Tianjin Univ Collaborat Innovat Ctr Chem Sci & Engn Tianjin Tianjin Key Lab Mol Optoelect Sci Tianjin 300072 Peoples R China

3,4-Difluorothiophene-substituted aryls, i.e., 1,4-bis(3,4-difluorothiophen-2-yl)-benzene (Ph-2FTh), 1,4-bis(3,4-difluorothiophen-2-yl)-2,5-difluorobenzene (2FPh-2FTh), and 4,7-bis(3,4-difluorothiophen-2-yl)-2,1,3-benzothiadiazole (BTz-2FTh), are synthesized as CH monomers for the synthesis of conjugated polymers (CPs) via direct arylation polycondensation (DArP) with diketopyrrolopyrrole (DPP) and isoindigo (IID) derivatives as CBr monomers. The Gibbs free energies of activation for direct arylation (& UDelta;G298 K, kcal mol-1) for & alpha;CH bonds of thiophene moieties as calculated by density functional theory (DFT) are 14.3, 16.5, and 16.4 kcal mol-1 for Ph-2FTh, 2FPh-2FTh and BTz-2FTh, respectively, meaning that inserting an electron-deficient unit in 3,3 & PRIME;,4,4 & PRIME;-tetrafluoro-2,2 & PRIME;-bithiophene (4FBT, & UDelta;G298K: 14.6 kcal mol-1) may cause a reactivity decrease of the CH monomers. Photophysical and semiconducting properties of the resulting six CPs (i.e., DPP-Ph, DPP-2FPh, DPP-BTz, 2FIID-Ph, 2FIID-2FPh, and 2FIID-BTz) are characterized in detail. DPP-based CPs show ambipolar transport properties while IID-based ones exhibited n-type behavior owing to the deeper frontier molecular orbital energy levels of IID-based CPs. With source/drain electrodes modified with polyethylenimine ethoxylated, n-channel organic thin-film transistors with maximum electron mobility of 0.40, 0.54, 0.29, 0.05, 0.16, and 0.01 cm2 V-1 s-1 for DPP-Ph, DPP-2FPh, DPP-BTz, 2FIID-Ph, 2FIID-2FPh, and 2FIID-BTz, respectively, are fabricated. DPP-2FPh exhibits the best device performance due to the good film morphology and the highest intermolecular packing order. Three CH monomers Ph-2FTh, 2FPh-2FTh, and BTz-2FTh with 3,4-difluorothiophene as terminal units and phenyl, 2,5-difluorophenyl and benzothiadiazole as central units are synthesized for direct arylation polycondensation to diketopyrrolopyrrole- and isoindigo-based high-mobility conjugated polymers. n-Channel org

关键词： conjugated polymers direct arylation polycondensation organic thin-film transistors polymer semiconductors

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Principles for waste concrete recycling and basic problems of recycled concrete

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CHINESE SCIENCE BULLETIN-CHINESE 2023年第5期68卷 510-523页

作者： Xiao, Jianzhuang Zhang, Hanghua Tang, Yuxiang Lu, Zhenyuan Ye, Taohua Duan, Zhenhua sui, Tongbo Xiao, xuwen Tongji Univ Coll Civil Engn Dept Bldg Engineer Shanghai 200092 Peoples R China Tongji Univ State Key Lab Disaster Reduct Civil Engineer Shanghai 200092 Peoples R China Tongji Univ Key Lab Adv Civil Engn Mat Minist Educ Shanghai 201804 Peoples R China Tongji Univ Key Lab Performance Evolut & Control Engn Struct Minist Educ Shanghai 200092 Peoples R China Sinoma Int Engn Co Ltd Beijing 100102 Peoples R China

The discovery and development of contemporary concrete have made substantial contributions to the industrial revolution and urbanization over the last two centuries. The tremendous use of concrete results in a large amount of solid waste and considerable carbon emissions. The effort on waste concrete recycling is significant and vital in light of the national strategy of "carbon peaking and neutrality". The previous research on the recycled concrete focused on the traditional ideas of aggregate substitution and parameter modification to normal concrete. However, new ideas for waste concrete recycling and low-carbon application of recycled concrete should be further investigated. The theory and methods of concrete composition, decomposition, and recycling are examined. In general, the synthesis of concrete necessitates managing the characteristics of raw ingredients to increase overall performance. A mature concrete synthesis system was established by the steady physical qualities of sand and gravels, the hydration reaction of cementitious materials, and scientific combination design. Furthermore, the changes in the physical qualities of concrete components provide a theoretical foundation for crushing and sieving to produce recycled materials. To make recycled concrete (RC), recycled aggregates (RAs) and recycled powder are employed. However, the use of RC is complicated by the uncertainty of raw material sources, variations in the hydration process and microstructures, and discrepancies in basic attributes. Multi-way modification strategies have been developed to improve the qualities of RAs and RC to realize the conversion of difficult-to-control wastes into controllable recycled materials. The qualities of RC are improved and the variability of these features is reduced by incorporating artificial intelligence technologies into the mixture design of RC based on big data. In addition, three criteria for the preparation of RC are proposed, including a safe applicat

关键词： waste concrete recycling recycled concrete recycled aggregate recycled powder full recycled aggregate concrete mixture design for recycling

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Direct Arylation Polycondensation toward Water/Alcohol-Soluble Conjugated Polymers: Influence of Side Chain Functional Groups

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ACS MACRO LETTERS 2021年第4期10卷 419-425页

作者： Zhao, Bowen Liang, Ziqi Zhang, Ying sui, Ying Shi, Yibo Zhang, xuwen Li, Miaomiao Deng, Yunfeng Geng, Yanhou Tianjin Univ Sch Mat Sci & Engn Tianjin 300072 Peoples R China Tianjin Univ Tianjin Key Lab Mol Optoelect Sci Tianjin 300072 Peoples R China Tianjin Univ Joint Sch Natl Univ Singapore & Tianjin Univ Int Campus Fuzhou 350207 Peoples R China

Direct arylation of 2,7-dibromofluorene with n-octyl, 6-diethoxylphosphorylhexyl, 6-(N,N-diethylamino)hexyl or 6-bromohexyl side chains and 1,2,4,5-tetrafluorobenzene (TFB) were conducted to investigate the effect of side chain functional groups on the coupling, and the resulting TFB-substituted fluorene derivatives were used as C-H monomers for the synthesis of water/alcohol soluble conjugated polymers (WSCPs) by direct arylation polycondensation (DArP). The direct arylation and DArP of the monomers carrying phosphonate and amino groups went on smoothly in typical DArP conditions, that is, Pd(OAc)(2)/(PBu2Me)-Bu-t-HBF4/base/DMAc and Pd-2(dba)(3)center dot CHCl3/P(o-MeOPh)(3)/pivalic acid/base/THF, and high molecular weight polymers with these groups were successfully synthesized. However, for fluorenemonomers with bromohexyl side chains, the target products could not be obtained from the above conditions but could be prepared in the absence of carboxylic acid additives in low polar solvents. With the above DArP-made polymers as cathode interfacial layers, high performance organic solar cells (OSCs) were successfully fabricated.

关键词： Monomers Organic reactions Organophosphorus compounds Condensation Polymers

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