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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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棉针织物铜或锰金属配合物漂白机理

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印染 2024年第6期50卷 13-17页

作者：李荣健温淑娟毛志平陈八斤金鲜花纪柏林东华大学化学与化工学院上海201620 东华大学国家染整工程技术研究中心上海201620 杭州传化精细化工有限公司浙江杭州310000 浙江传化功能新材料有限公司浙江杭州310000

为了阐明金属配合物对棉针织物的漂白机理及性能,研究了多吡啶类铜配合物(CAT-3)与大环多胺类锰配合物(JK500)对棉针织物白度和双氧水(H_(2)O_(2))分解率的影响。结果表明:CAT-3作催化剂时,优化的漂白工艺为NaOH 1.0 g/L、H_(2)O_(2)13 ... 详细信息

为了阐明金属配合物对棉针织物的漂白机理及性能,研究了多吡啶类铜配合物(CAT-3)与大环多胺类锰配合物(JK500)对棉针织物白度和双氧水(H_(2)O_(2))分解率的影响。结果表明:CAT-3作催化剂时,优化的漂白工艺为NaOH 1.0 g/L、H_(2)O_(2)13 g/L、CAT-32.0 g/L,织物白度为68.97%;JK500作催化剂时,漂白优化工艺为NaOH 2.0 g/L、H_(2)O_(2)13 g/L、JK5002.5 g/L,织物白度为65.92%。75℃处理60 min后,CAT-3/H_(2)O_(2)体系中H_(2)O_(2)分解率达到60.93%,远高于无CAT-3时的12.31%;JK500/H_(2)O_(2)体系中H_(2)O_(2)分解率为19.25%,未加JK500时的分解率为18.18%。CAT-3/H_(2)O_(2)体系的羟基自由基(HO·)荧光检测强度远高于对照组C_(0);JK500/H_(2)O_(2)及其对照组J0体系的HO·荧光强度均较小;超氧自由基(O_(2)^(-)·)是两种催化体系有效的漂白活性成分,而单线态氧(1O2)对织物白度基本无影响。

关键词：金属配合物低温漂白棉针织物羟基自由基超氧自由基

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Analysis and Approximation of Gradient Flows Associated with a Fractional Order Gross-Pitaevskii Free Energy

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Communications on Applied Mathematics and Computation 2019年第1期1卷 5-19页

作者： Mark Ainsworth zhiping mao Division of Applied Mathematics Brown UniversityProvidenceRI 02912USA

We establish the well-posedness of the fractional PDE which arises by considering the gradient flow associated with a fractional Gross-Pitaevskii free energy functional and some basic properties of the *** equation reduces to the Allen-Cahn or Cahn-Hilliard equations in the case where the mass tends to zero and an integer order derivative is used in the *** study how the presence of a non-zero mass affects the nature of the solutions compared with the Cahn-Hilliard *** particular,we show that,analogous to the Cahn-Hilliard case,the solutions consist of regions in which the solution is a piecewise constant(whose value depends on the mass and the fractional order)separated by an interface whose width is independent of the mass and the fractional ***,if the average value of the initial data exceeds some threshold(which we determine explic让ly),then the solution will tend to a single constant steady state.

关键词： Fractional differential equation Non-local energy Well-posedness Fourier spectral method

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Physics-informed neural networks(PINNs)for fluidmechanics:a review

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Acta Mechanica Sinica 2021年第12期37卷 1727-1738页

作者： Shengze Cai zhiping mao Zhicheng Wang Minglang Yin George Em Karniadakis Division of Applied Mathematics Brown UniversityProvidenceRI 02912USA School of Mathematical Sciences Xiamen University 361005 China Laboratory of Ocean Energy Utilization of Ministry of Education Dalian University of TechnologyDalian116024China School of Engineering Brown UniversityProvidenceRI 02912USA Center for Biomedical Engineering Brown UniversityProvidenceRI 02912USA

Despite the significant progress over the last 50 years in simulating flow problems using numerical discretization of the Navier–Stokes equations(NSE),we still cannot incorporate seamlessly noisy data into existing algorithms,mesh-generation is complex,and we cannot tackle high-dimensional problems governed by parametrized ***,solving inverse flow problems is often prohibitively expensive and requires complex and expensive formulations and new computer ***,we review flow physics-informed learning,integrating seamlessly data and mathematical models,and implement them using physics-informed neural networks(PINNs).We demonstrate the effectiveness of PINNs for inverse problems related to three-dimensional wake flows,supersonic flows,and biomedical flows.

关键词： Physics-informed learning PINNs Inverse problems Supersonic flows Biomedical flows

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Nonlocal Flocking Dynamics: Learning the Fractional Order of PDEs from Particle Simulations

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Communications on Applied Mathematics and Computation 2019年第4期1卷 597-619页

作者： zhiping mao Zhen Li George Em Karniadakis Division of Applied Mathematics Brown UniversityProvidenceRI02912USA Pacific Northwest National Laboratory RichlandWA 99354USA

Flocking refers to collective behavior of a large number of interacting entities,where the interactions between discrete individuals produce collective motion on the large *** employ an agent-based model to describe the microscopic dynamics of each individual in a flock,and use a fractional partial differential equation(fPDE)to model the evolution of macroscopic quantities of *** macroscopic models with phenomenological interaction functions are derived by applying the continuum hypothesis to the microscopic *** of specifying the fPDEs with an ad hoc fractional order for nonlocal flocking dynamics,we learn the effective nonlocal influence function in fPDEs directly from particle trajectories generated by the agent-based *** demonstrate how the learning framework is used to connect the discrete agent-based model to the continuum fPDEs in one-and two-dimensional nonlocal flocking *** particular,a Cucker-Smale particle model is employed to describe the microscale dynamics of each individual,while Euler equations with nonlocal interaction terms are used to compute the evolution of macroscale *** trajectories generated by the particle simulations mimic the field data of tracking logs that can be obtained *** can be used to learn the fractional order of the influence function using a Gaussian process regression model implemented with the Bayesian *** show in one-and two-dimensional benchmarks that the numerical solution of the learned Euler equations solved by the finite volume scheme can yield correct density distributions consistent with the collective behavior of the agent-based system solved by the particle *** proposed method offers new insights into how to scale the discrete agent-based models to the continuum-based PDE models,and could serve as a paradigm on extracting effective governing equations for nonlocal flocking dynamics directly from particle trajectories.

关键词： Fractional PDEs Gaussian process Bayesian optimization Fractional Laplacian Conservation laws

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活性及分散染料染色新技术

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纺织学报 2023年第5期44卷 1-12页

作者：吴伟纪柏林毛志平东华大学化学与化工学院上海201620 东华大学生态纺织教育部重点实验室上海201620 东华大学国家染整工程技术研究中心上海201620 东华大学纺织科技创新中心上海201620 国家先进印染技术创新中心山东泰安271000

为促进印染工业向高质低耗方向发展,对近年来国内外活性和分散染料染色的技术发展和研究工作进行了综述。从少盐/无盐染色技术、低给液高固色率染色技术、少水/非水介质染色技术、针织物平幅连续浸轧染色技术4个方面详细介绍了活性染料... 详细信息

为促进印染工业向高质低耗方向发展,对近年来国内外活性和分散染料染色的技术发展和研究工作进行了综述。从少盐/无盐染色技术、低给液高固色率染色技术、少水/非水介质染色技术、针织物平幅连续浸轧染色技术4个方面详细介绍了活性染料染色技术的发展现状,从碱性染色技术、液体纳米分散染料染色技术、免水洗连续染色技术、非水介质染色技术4个方面阐述了分散染料的研究进展,着重分析了这些技术的优势、存在缺陷和未来发展方向。分析认为,2种染料染色技术的发展主要关注减少化学品的使用和污水排放、提高染料利用率以及提高染色生产效率,着力促使印染工业向绿色、低耗和可持续发展方向迈进。

关键词：活性染料分散染料染色新技术提质增效节能减排

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拼混活性染料染色多组分定量分析方法

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纺织学报 2023年第7期44卷 141-150页

作者：郭玉秋钟毅徐红毛志平东华大学化学与化工学院上海201620 东华大学生态纺织教育部重点实验室上海201620 东华大学纺织科技创新中心上海201620 国家先进印染技术创新中心山东泰安271000 国家染整工程技术研究中心上海201620

将拉曼光谱技术与化学计量法(偏最小二乘法)结合,建立了一种简便、灵敏、精确的多组分定量分析方法,可对混合液体多组分同时进行定量分析,进而有效提高织物色光稳定性和产品质量。首先根据拉曼光谱特征峰与染料质量浓度之间的线性关系... 详细信息

将拉曼光谱技术与化学计量法(偏最小二乘法)结合,建立了一种简便、灵敏、精确的多组分定量分析方法,可对混合液体多组分同时进行定量分析,进而有效提高织物色光稳定性和产品质量。首先根据拉曼光谱特征峰与染料质量浓度之间的线性关系测定待测组分的检测极限,确定定量成分适用的质量浓度范围;然后构建多组分混合体系定量分析模型;最后通过检测双乙烯砜活性基结构的活性染料拼混染色在吸附过程中各组分质量浓度变化和纤维上染百分率,进一步评价染料的配伍性。结果表明:模型的拟合值与标准值之间的相关系数均大于0.99,内部交互验证均方根误差和预测均方根误差值均小于0.2,通过本文方法构建的多组分定量分析模型具有较高的准确性,且拼混的染料结构和质量比会影响单一组分的上染过程。

关键词：拉曼光谱技术多组分定量分析模型活性染料拼色染色棉织物

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Simulation and evaluation study of atmospheric aerosol nonsphericity as a function of particle size

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Particuology 2024年第7期90卷 281-291页

作者： Qianjun mao Xin Nie School of Urban Construction Wuhan University of Science and TechnologyWuhan430065China College of New Energy and Materials Northeast Petroleum UniversityDaqing163318China

Aerosol nonsphericity causes great uncertainty in radiative forcing assessments and climate *** considerable studies have attempted to quantify this uncertainty,the relationship between aerosol nonsphericity and particle size is usually not considered,thus reducing the accuracy of the *** this study,a coupled inversion algorithm combining an improved stochastic particle swarm optimization algorithm and angular light scattering is used for the nonparametric estimation of aerosol nonsphericity variation with particle size,and the optimal sample selection method is employed to screen the *** on the verification of inversion accuracy,the variation of aerosol aspect ratio with particle size based on the ellipsoidal model in global regions has been obtained from Aerosol Robotic Network(AERONET)data,and the effect of nonsphericity on radiative forcing and dry deposition has been *** results show that the aspect ratio increases with particle size in all regions,with the maximum ranging from 1.4 to 1.8 in the desert,reflecting the differences in aerosol composition at different particle *** radiation calculations,considering aerosol nonsphericity makes the aerosol cooling effect weaker and surface radiative fluxes increase,but hardly changes the aerosol absorption,with maximum differences of 9.22%and 22.12%at the bottom and top of the atmosphere,***,the differences in radiative forcing between aspect ratios as a function of particle size and not varying with particle size are not significant,averaging less than 2%.Besides,the aspect ratio not varying with particle size underestimates the deposition velocity of small particles and overestimates that of large particles compared to that as a function of particle size,with maximum differences of 7%and 4%,respectively.

关键词： Aerosol nonsphericity Inversion Aspect ratio Radiative forcing Dry deposition velocity

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Proof of Two Supercongruences of Truncated Hypergeometric Series_(4)F_(3)

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Acta Mathematica Sinica,English Series 2024年第4期40卷 1015-1028页

作者： Guo Shuai mao Department of Mathematics Nanjing University of Information Science and TechnologyNanjing 210044P.R.China

In this paper,we prove two supercongruences conjectured by Z.-*** via the Wilf-Zeilberger *** of them is,for any prime p>3,4F3[7/6 1/2 1/2 1/2 1/6 1 1]-1/8]-1/2≡p(-2/p)+p^(3)/4(2/p)Ep-3 (mod p^(4))where(·/p)stands f... 详细信息

关键词： Supercongruence truncated hypergeometric series Wilf–Zeilberger method Euler numbers Legendre symbol

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纺织染整领域支撑低碳排放的关键技术

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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

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