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Thermally conductive poly(lactic acid)/boron nitride composites via regenerated cellulose assisted Pickering emulsion approach

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Journal of Materials Science & Technology 2022年第6期101卷 146-154页

作者： Yating wang Hong Jin Jiajun Shen bijia wang Xueling Feng Zhiping Mao Yumei Zhang Xiaofeng Sui Key Lab of Science and Technology of Eco-Textile Ministry of EducationCollege of ChemistryChemical Engineering and BiotechnologyDonghua UniversityNo.2999North Renmin RoadSongjiang DistrictShanghai 201620China Innovation Center for Textile Science and Technology of DHU Donghua UniversityNo.2999North Renmin RoadSongjiang DistrictShanghai 201620China State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of Materials Science and EngineeringDonghua UniversityNo.2999North Renmin RoadSongjiang DistrictShanghai 201620China

Polymer-based thermally conductive composites have attracted tremendous interest in thermal management of ***,it remains challenging to achieve high thermal conductivity partly because the difficulty to obtain favorable distribution and orientation of conductive fillers within the polymer ***,networked boron nitride(BN)conductive pathway was realized within the poly(lactic acid)(PLA)matrix,via regenerated cellulose(RC)-assisted assembly of BN on Pickering emulsion interface based on the noncovalent interaction,followed by solvent evaporation and *** strong noncovalent interactions between BN and RC were found critical to enhance the wettability and stability of BN in aqueous media with a lowest mass ratio of 1:40 of RC and *** obtained PLA/BN composites feature a thermal conductivity of 1.06 W/(m K)at 28.4 wt%BN loading,representing an enhancement of 430%comparing to neat PLA,and the crystallinity of the composites could increase significantly from11.7%(neat PLA)to 43.7%.This simple,environmentally friendly and effective strategy could be easily extended for effective construction of thermally conductive composites.

关键词： Boron nitride Regenerated cellulose Emulsion Noncovalent interaction Thermal conductivity

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纺织染整领域支撑低碳排放的关键技术

纺织学报 2022年第1期43卷 113-121页

作者：纪柏林王碧佳毛志平东华大学化学化工与生物工程学院上海201620 东华大学国家染整工程技术研究中心上海201620 东华大学生态纺织教育部重点实验室上海201620 国家先进印染技术创新中心山东泰安271000

为深入了解染整行业近年来在低碳排放领域取得的技术突破和现状,掌握行业技术前沿和发展趋势,对国内外相关技术和研究进展进行了综述。主要从节能减排技术、功能纺织品技术、先进绿色染整加工设备及系统、废水深度处理及化学品循环回用... 详细信息

为深入了解染整行业近年来在低碳排放领域取得的技术突破和现状,掌握行业技术前沿和发展趋势,对国内外相关技术和研究进展进行了综述。主要从节能减排技术、功能纺织品技术、先进绿色染整加工设备及系统、废水深度处理及化学品循环回用几个方面,对技术性能及其对低碳排放的作用进行了介绍。研究指出:染整领域不仅传统加工手段取得技术突破,还在智能调温纺织品等前沿领域保持与时俱进;通过多维度努力,有助于推动染整行业不断的技术创新,提升产业价值,减少环境影响,实现绿色低碳循环发展,并为实现碳达峰、碳中和的国家目标贡献行业力量。

关键词：低碳排放染整节能减排功能性纺织品智能制造

Polyoxometalate-loaded Nanocellulose Sponge as a Novel Catalyst for the Regioselective Hydroboration of Phenylacetylene

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Paper And Biomaterials 2019年第2期4卷 1-9页

作者： GuoQing Yang CongCong Zhang bijia wang ZhiPing Mao Hong Xu Yi Zhong XueLing Feng XiaoFeng Sui Key Lab of Science and Technology of Eco-textile Ministry of EducationCollege of ChemistryChemical Engineering and BiotechnologyDonghua UniversityShanghai201620China Innovation Center for Textile Science and Technology of DHU Donghua UniversityShanghai201620China

In this work,an amino-modified cellulose nanofiber sponge was prepared and used as a support for polyoxometalate(POM)catalysts with a high loading *** transform infrared spectroscopy,thermogravimetric analysis,and energy-dispersive X-ray spectroscopy revealed that an Anderson-type POM,(NH4)4[CuMo6O18(OH)6]·5H2O was successfully immobilized on the sponge based on electrostatic *** analysis indicated that the POM-loaded sponge retained its porous structure and that the POM was homogeneously distributed on the sponge *** POM-loaded sponge exhibited excellent mechanical properties by recovering 79.9%of its original thickness following a 60%compression *** POM-loaded sponge was found to effectively catalyze the hydroboration of phenylacetylenes,yielding excellent conversion and regioselectivity of up to 96%and 99%,*** catalytic activity remained unchanged after five reuse *** findings represent a scalable strategy for immobilizing POMs on porous supports.

关键词： cellulose nanofiber polyoxometalates catalyst immobilization hydroboration heterogeneous catalyst

纳米甲壳素稳定蜂蜡油凝胶Pickering乳液的性能研究

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日用化学工业 2022年第8期52卷 844-850页

作者：沈嘉骏宦静静王碧佳隋晓锋东华大学化学化工与生物工程学院生态纺织教育部重点实验室上海201620 芬美意香料(中国)有限公司上海201108

用盐酸蒸汽处理甲壳素原料来制备纳米甲壳素,其形貌为棒状结构且平均直径约为50~60 nm、具有较高的长径比。以蜂蜡和玉米油制成的油凝胶作为油相,用纳米甲壳素作为Pickering乳液稳定剂,制得O/W型油凝胶Pickering乳液。用光学显微镜、荧... 详细信息

用盐酸蒸汽处理甲壳素原料来制备纳米甲壳素,其形貌为棒状结构且平均直径约为50~60 nm、具有较高的长径比。以蜂蜡和玉米油制成的油凝胶作为油相,用纳米甲壳素作为Pickering乳液稳定剂,制得O/W型油凝胶Pickering乳液。用光学显微镜、荧光显微镜、动态光散射粒度仪、流变仪对乳液进行表征。偏振光显微镜图片中的双折射现象表明蜂蜡油凝胶被包裹在油滴中。荧光显微镜的结果显示纳米甲壳素在油/水界面的吸附能力很强,在纳米甲壳素质量分数仅为0.2%时,即可乳化含有10%(质量分数)蜂蜡的油相得到稳定的油凝胶Pickering乳液(油/水质量比为1∶9),且干燥除水后能够维持原貌。油凝胶以及其乳液的流变行为表明纳米甲壳素在油/水界面具有较好的机械阻隔作用,且油凝胶可以在剪切作用下被释放。

关键词： Pickering乳液纳米甲壳素盐酸蒸汽蜂蜡油凝胶

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纳米甲壳素的快速制备及其乳化性能研究

日用化学工业（中英文） 2022年第10期52卷 1081-1087页

作者：宦静静王碧佳毛志平隋晓锋东华大学化学化工与生物工程学院生态纺织教育部重点实验室上海201620

简化磷酸溶解再生制备纳米甲壳素的工艺,避免大量溶剂的使用、缩短制备时间以及提高产率。采用X射线衍射、透射电镜和电感耦合等离子体发射光谱仪对甲壳素及再生纳米甲壳素进行了表征。以辛酸/癸酸甘油三酯(GTCC)作为油相,用纳米甲壳素... 详细信息

简化磷酸溶解再生制备纳米甲壳素的工艺,避免大量溶剂的使用、缩短制备时间以及提高产率。采用X射线衍射、透射电镜和电感耦合等离子体发射光谱仪对甲壳素及再生纳米甲壳素进行了表征。以辛酸/癸酸甘油三酯(GTCC)作为油相,用纳米甲壳素作为Pickering乳液稳定剂,制得水包油(O/W)型Pickering乳液。通过各类表征证明该方法制备的所有纳米甲壳素均可以乳化GTCC得到稳定的Pickering乳液(纳米甲壳素含量为0.2%)。随后其乳液的流变行为表明纳米甲壳素能很好地吸附在油水界面上,并且稳定Pickering乳液。

关键词：纳米甲壳素磷酸高效制备 Pickering乳液

The reformation of catalyst:From a trial-and-error synthesis to rational design

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Nano Research 2024年第4期17卷 3261-3301页

作者： Ligang wang Jiabin Wu Shunwu wang Huan Liu Yao wang Dingsheng wang Department of Chemistry Tsinghua UniversityBeijing 100084China

The appropriate catalysts can accelerate the reaction rate and effectively boost the efficient conversion of various molecules,which is of great importance in the study of chemistry,chemical industry,energy,materials and environmental ***,efficient,environmentally friendly,and easy to operate synthesis methods have been used to prepare various types of *** previous studies have reported the synthesis and characterization of the aforementioned catalysts,more still remain in trial and error methods,without in-depth consideration and improvement of traditional synthesis ***,we comprehensively summarize and compare the preparation methods of the trial-and-error synthesis strategy,structure–activity relationships and density functional theory(DFT)guided catalysts rational design for nanomaterials and atomically dispersed *** also discuss in detail the utilization of the nanomaterials and single atom catalysts for converting small molecules(H_(2)O,O_(2),CO_(2),N_(2),etc.)into value-added products driven by electrocatalysis,photocatalysis,and ***,the challenges and outlooks of mass preparation and production of efficient and green catalysts through conventional trial and error synthesis and DFT theory are featured in accordance with its current development.

关键词： trial-and-error synthesis structure–activity relationships density functional theory(DFT)guidance nanomaterials atomically dispersed catalysts

Numerical Analysis of PRISM-PY Calculations for Hard-and Soft-Core Generic Polymer Models

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Chinese Journal of Polymer Science 2024年第4期42卷 532-543页

作者： Qiang wang Department of Chemical and Biological Engineering Colorado State University1370 Campus DeliveryFort CollinsCO80523-1370USA

Generic polymer models capturing the chain connectivity and excluded-volume interactions between polymer segments can be classified, according to whether or not the 3D integral of the latter diverges, into hard- and soft-core models. Taking homogeneous systems of compressible homopolymer melts (or equivalently homopolymer solutions in an implicit, good solvent) in the continuum as an example, we recently compared the correlation effects on the structural and thermodynamic properties of the hard- and soft-core models given by the polymer reference interaction site model (PRISM) theory with the Percus-Yevick (PY) closure (Polymers 2023, 15, 1180). Here we analyzed in detail the numerical errors and behavior of the interchain pair correlation functions (PCFs) given by the PRISM-PY calculations of these models using an efficient numerical approach that we proposed. Our numerical approach has the least number of independent variables to be iteratively solved, analytically treats the discontinuities caused by the non-bonded pair potential (such as that of the hard spheres) and takes only the inverse Fourier transform of the interchain indirect PCF between polymer segments (which is continuous and decays towards 0 with increasing wavenumber much faster than both the interchain direct and total PCFs), and is essential for us to accurately solve the PRISM-PY theory for chain length N as large as 106. To capture the correlation-hole effect, the real-space cut-off in the PRISM calculations should be proportional to the square root of N.

关键词： Generic polymer models Soft potentials Polymer reference interaction site model theory

Linear-Quadratic Pareto Cooperative Game for Mean-Field Backward Stochastic System

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Journal of Systems Science & Complexity 2024年第3期37卷 947-964页

作者： wang Yu School of Control Science and Engineering Shandong UniversityJinan 250061China

This paper focuses on a Pareto cooperative differential game with a linear mean-field backward stochastic system and a quadratic form cost functional. Based on a weighted sum optimality method, the Pareto game is equivalently converted to an optimal control problem. In the first place,the feedback form of Pareto optimal strategy is derived by virtue of decoupling technology, which is represented by four Riccati equations, a mean-field forward stochastic differential equation(MF-FSDE),and a mean-field backward stochastic differential equation(MF-BSDE). In addition, the corresponding Pareto optimal solution is further obtained. Finally, the author solves a problem in mathematical finance to illustrate the application of the theoretical results.

关键词： Backward stochastic differential equation linear-quadratic control mean-field Pareto optimality

Light People: Professor Fanglin Bao and his cover story

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Light(Science & Applications) 2024年第6期13卷 1015-1020页

作者： Ji wang School of Science Westlake UniversityHangzhouZhejiangPR China

Qu Yuan,a renowned ancient Chinese poet,once pondered in his work Heavenly Inquiry:“If the sun’s light is absent,from where does the radiance of the Hero Flower emanate?”The ability to see clearly in the darkest of nights has long been a sought-after magical power by *** holds not only immense technological significance for computer vision and remote sensing but also profound implications for transcending the dichotomy between day and night in our daily *** Fanglin Bao from Westlake University has made significant breakthroughs in this field,bringing us closer to a world where we can transform night into *** groundbreaking research on Heat-Assisted Detection and Ranging(HADAR)and night vision was featured as the cover story in Nature on July 26,2023.

关键词： bringing breakthrough holds