arXiv - PHYS - Soft Condensed Matter最新文献_第2页

Hydrodynamics in Semidilute Polyelectrolyte Solutions and Complex Coacervates 半稀释聚电解质溶液和复杂共胶体中的流体力学

arXiv - PHYS - Soft Condensed Matter Pub Date : 2024-09-14 DOI: arxiv-2409.09450

Shensheng Chen, Zhen-Gang Wang

引用次数: 0

The Properties of Glass Fiber Reinforced Polypropylene Filaments Recycled from Fishing Gear 从渔具中回收的玻璃纤维增强聚丙烯纤维的特性

arXiv - PHYS - Soft Condensed Matter Pub Date : 2024-09-14 DOI: arxiv-2409.09445

Garrett Russell

{"title":"The Properties of Glass Fiber Reinforced Polypropylene Filaments Recycled from Fishing Gear","authors":"Garrett Russell","doi":"arxiv-2409.09445","DOIUrl":"https://doi.org/arxiv-2409.09445","url":null,"abstract":"Plastic pollution, mainly from lost fishing gear composed of high-density\u0000polyethylene (HDPE) and polypropylene (PP), poses a significant environmental\u0000obstacle. This study evaluates the potential of recycling PP from fishnet/rope\u0000and reinforcing it with glass fiber (GF) in the form of 3D printer filaments as\u0000a way to reduce/prevent ocean plastic. Two materials, one virgin (vPP-GF) and\u0000one made up of recycled polypropylene and virgin glass fibers (rPP-GF), were\u0000analyzed using differential scanning calorimetry, tensile, and Charpy impact\u0000tests. From the results, it was found that rPP-GF often outperformed vPP-GF.\u0000rPP-GF had a higher melting and crystallization point, likely a higher\u0000crystallinity, and could withstand a higher tensile stress, while vPP-GF could\u0000withstand a higher tensile strain. Further analysis revealed the potential\u0000presence of HDPE within the rPP-GF composite, which was not reported by the\u0000manufacturer. This significantly affected the Charpy test and made it difficult\u0000to draw conclusions from the resulting data. Nevertheless, their comparability\u0000in terms of mechanical and material properties indicates the strong potential\u0000of recycling polypropylene fishnet/rope and reinforcing it with glass fibers to\u0000extend their lifespan and reduce ocean plastic.","PeriodicalId":501146,"journal":{"name":"arXiv - PHYS - Soft Condensed Matter","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142256864","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Polydisperse polymer fractionation between phases 相间多分散聚合物分馏

arXiv - PHYS - Soft Condensed Matter Pub Date : 2024-09-13 DOI: arxiv-2409.09229

J. Pedro de Souza, William M. Jacobs, Howard A. Stone

引用次数: 0

Assembly of Complex Colloidal Systems Using DNA 利用 DNA 组装复杂的胶体系统

arXiv - PHYS - Soft Condensed Matter Pub Date : 2024-09-13 DOI: arxiv-2409.08988

William M. Jacobs, W. Benjamin Rogers

引用次数: 0

Structural and dynamical investigation of glassforming smectogen by X-ray diffraction and infra-red spectroscopy aided by density functional theory calculations 在密度泛函理论计算的帮助下，通过 X 射线衍射和红外光谱对玻璃变形胶原进行结构和动力学研究

arXiv - PHYS - Soft Condensed Matter Pub Date : 2024-09-13 DOI: arxiv-2409.08654

Aleksandra Deptuch, Natalia Górska, Stanisław Baran, Magdalena Urbańska

{"title":"Structural and dynamical investigation of glassforming smectogen by X-ray diffraction and infra-red spectroscopy aided by density functional theory calculations","authors":"Aleksandra Deptuch, Natalia Górska, Stanisław Baran, Magdalena Urbańska","doi":"arxiv-2409.08654","DOIUrl":"https://doi.org/arxiv-2409.08654","url":null,"abstract":"Molecular arrangement in the chiral smectic phases of the glassforming\u0000(S)-4'-(1-methylheptylcarbonyl)biphenyl-4-yl\u00004-[7-(2,2,3,3,4,4,4-heptafluorobutoxy) heptyl-1-oxy]benzoate is investigated by\u0000X-ray diffraction. An increased correlation length of the positional\u0000short-range order in the supercooled state agrees with the previous assumption\u0000of the hexatic smectic phase. However, the registered X-ray diffraction\u0000patterns are not typical for the hexatic phases. Comparison of the smectic\u0000layer spacing and optical tilt angle indicates a strongly non-linear shape of\u0000molecules, which enables choice of the molecular models obtained by DFT\u0000calculations, used subsequently to interpret the infra-red spectra. The\u0000presumption of the hexatic smectic FA* or IA* phase is supported by the\u0000splitting of the absorption bands related to the C=O stretching in the\u0000supercooled state, which is absent in the smectic CA* phase above the melting\u0000temperature. The glass transition affects the temperature dependence of the\u0000smectic layer spacing but only subtly impacts the infra-red spectra.\u0000Application of the k-means cluster analysis enables distinction between the\u0000infra-red spectra below and above the glass transition temperature, but only\u0000for certain spectral ranges.","PeriodicalId":501146,"journal":{"name":"arXiv - PHYS - Soft Condensed Matter","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142256866","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effect of pressure on the carbon dioxide hydrate-water interfacial free energy along its dissociation line 压力对二氧化碳水合物-水界面自由能解离线的影响

arXiv - PHYS - Soft Condensed Matter Pub Date : 2024-09-12 DOI: arxiv-2409.07844

Cristóbal Romero-Guzmán, Iván M. Zerón, Jesús Algaba, Bruno Mendiboure, José Manuel Míguez, Felipe J. Blas

{"title":"Effect of pressure on the carbon dioxide hydrate-water interfacial free energy along its dissociation line","authors":"Cristóbal Romero-Guzmán, Iván M. Zerón, Jesús Algaba, Bruno Mendiboure, José Manuel Míguez, Felipe J. Blas","doi":"arxiv-2409.07844","DOIUrl":"https://doi.org/arxiv-2409.07844","url":null,"abstract":"We investigate the effect of pressure on the carbon dioxide (CO$_{2}$)\u0000hydrate-water interfacial free energy along its dissociation line using\u0000advanced computer simulation techniques. In previous works, we have determined\u0000the interfacial energy of the hydrate at $400 ,text{bar}$ using the TIP4P/ice\u0000and TraPPE molecular models for water and CO$_{2}$, respectively, in\u0000combination with two different extensions of the Mold Integration technique [J.\u0000Chem. Phys. 141, 134709 (2014)]. Results obtained from computer simulation,\u0000$29(2)$ and $30(2),text{mJ/m}^{2}$, are found to be in excellent agreement\u0000with the only two measurements that exist in the literature,\u0000$28(6),text{mJ/m}^{2}$ determined by Uchida et al. [J. Phys. Chem. B 106,\u00008202 (2002)] and $30(3),text{mJ/m}^{2}$ by Anderson et al. [J. Phys. Chem. B\u0000107, 3507 (2002)]. Since the experiments do not allow to obtain the variation\u0000of the interfacial energy along the dissociation line of the hydrate, we extend\u0000our previous studies to quantify the effect of pressure on the interfacial\u0000energy at different pressures. Our results suggest that there exists a\u0000correlation between the interfacial free energy values and the pressure, i.e.,\u0000it decreases with the pressure between $100$ and $1000,text{bar}$. We expect\u0000that the combination of reliable molecular models and advanced simulation\u0000techniques could help to improve our knowledge of the thermodynamic parameters\u0000that control the interfacial free energy of hydrates from a molecular\u0000perspective.","PeriodicalId":501146,"journal":{"name":"arXiv - PHYS - Soft Condensed Matter","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142227390","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Loading-dependent microscale measures control bulk properties in granular material: an experimental test of the Stress-Force-Fabric relation 控制颗粒材料体积特性的微观尺度措施与加载有关：应力-力-织物关系的实验测试

arXiv - PHYS - Soft Condensed Matter Pub Date : 2024-09-12 DOI: arxiv-2409.08140

Carmen L. Lee, Ephraim Bililign, Emilien Azéma, Karen E. Daniels

{"title":"Loading-dependent microscale measures control bulk properties in granular material: an experimental test of the Stress-Force-Fabric relation","authors":"Carmen L. Lee, Ephraim Bililign, Emilien Azéma, Karen E. Daniels","doi":"arxiv-2409.08140","DOIUrl":"https://doi.org/arxiv-2409.08140","url":null,"abstract":"The bulk behaviour of granular materials is tied to its mesoscale and\u0000particle-scale features: strength properties arise from the buildup of various\u0000anisotropic structures at the particle-scale induced by grain connectivity\u0000(fabric), force transmission, and frictional mobilization. More fundamentally,\u0000these anisotropic structures work collectively to define features like the bulk\u0000friction coefficient and the stress tensor at the macroscale and can be\u0000explained by the Stress-Force-Fabric (SFF) relationship stemming from the\u0000microscale. Although the SFF relation has been extensively verified by discrete\u0000numerical simulations, a laboratory realization has remained elusive due to the\u0000challenge of measuring both normal and frictional contact forces. In this\u0000study, we analyze experiments performed on a photoelastic granular system under\u0000four different loading conditions: uniaxial compression, isotropic compression,\u0000pure shear, and annular shear. During these experiments, we record particle\u0000locations, contacts, and normal and frictional forces vectors to measure the\u0000particle-scale response to progressing strain. We track microscale measures\u0000like the packing fraction, average coordination number and average normal force\u0000along with anisotropic distributions of contacts and forces. We match the\u0000particle-scale anisotropy to the bulk using the SFF relation, which is founded\u0000on two key principles, a Stress Rule to describe the stress tensor and a Sum\u0000Rule to describe the bulk friction coefficient; we find that the Sum and Stress\u0000Rules accurately describe bulk measurements. Additionally, we test the\u0000assumption that fabric and forces transmit load equally through our granular\u0000packings and show that this assumption is sufficient at large strain values,\u0000and can be applied to areas like rock mechanics, soft colloids, or cellular\u0000tissue where force information is inaccessible.","PeriodicalId":501146,"journal":{"name":"arXiv - PHYS - Soft Condensed Matter","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142220782","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Critical Casimir levitation of colloids above a bull's-eye pattern 牛眼图案上方胶体的临界卡西米尔浮力

arXiv - PHYS - Soft Condensed Matter Pub Date : 2024-09-12 DOI: arxiv-2409.08366

Piotr Nowakowski, Nima Farahmand Bafi, Giovanni Volpe, Svyatoslav Kondrat, S. Dietrich

{"title":"Critical Casimir levitation of colloids above a bull's-eye pattern","authors":"Piotr Nowakowski, Nima Farahmand Bafi, Giovanni Volpe, Svyatoslav Kondrat, S. Dietrich","doi":"arxiv-2409.08366","DOIUrl":"https://doi.org/arxiv-2409.08366","url":null,"abstract":"Critical Casimir forces emerge among particles or surfaces immersed in a\u0000near-critical fluid, with the sign of the force determined by surface\u0000properties and with its strength tunable by minute temperature changes. Here,\u0000we show how such forces can be used to trap a colloidal particle and levitate\u0000it above a substrate with a bull's-eye pattern consisting of a ring with\u0000surface properties opposite to the rest of the substrate. Using the Derjaguin\u0000approximation and mean-field calculations, we find a rich behavior of spherical\u0000colloids at such a patterned surface, including sedimentation towards the ring\u0000and levitation above the ring (ring levitation) or above the bull's-eye's\u0000center (point levitation). Within the Derjaguin approximation, we calculate a\u0000levitation diagram for point levitation showing the depth of the trapping\u0000potential and the height at which the colloid levitates, both depending on the\u0000pattern properties, the colloid size, and the solution temperature. Our\u0000calculations reveal that the parameter space associated with point levitation\u0000shrinks if the system is driven away from a critical point, while,\u0000surprisingly, the trapping force becomes stronger. We discuss the application\u0000of critical Casimir levitation for sorting colloids by size and for determining\u0000the thermodynamic distance to criticality. Our results show that critical\u0000Casimir forces provide rich opportunities for controlling the behavior of\u0000colloidal particles at patterned surfaces.","PeriodicalId":501146,"journal":{"name":"arXiv - PHYS - Soft Condensed Matter","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142256869","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Shape, temperature and density interplay in depletion forces 损耗力中形状、温度和密度的相互作用

arXiv - PHYS - Soft Condensed Matter Pub Date : 2024-09-12 DOI: arxiv-2409.08209

Itay Azizi

引用次数: 0

Branches, Tie Chains and Entanglements in Bimodal Polyethylene Single Crystals under Uniaxial Tensile Strain 单轴拉伸应变下双模聚乙烯单晶中的分支、拉链和缠结

arXiv - PHYS - Soft Condensed Matter Pub Date : 2024-09-12 DOI: arxiv-2409.08399

William S. Fall, Jörg Baschnagel, Hendrik Meyer

{"title":"Branches, Tie Chains and Entanglements in Bimodal Polyethylene Single Crystals under Uniaxial Tensile Strain","authors":"William S. Fall, Jörg Baschnagel, Hendrik Meyer","doi":"arxiv-2409.08399","DOIUrl":"https://doi.org/arxiv-2409.08399","url":null,"abstract":"Using coarse-grained molecular dynamics simulations and a united-monomer\u0000model of PE, single well-aligned multi-lamella PE crystals grown in previous\u0000work [ACS Macro Letters 12, 808 (2023)] are deformed uniaxially to mimic\u0000tensile testing. During deformation, the crystallinity, tie-chain segments,\u0000entanglements and folds are monitored and correlated with the stress-strain\u0000behaviour and mechanical properties. At small strains, the single well-aligned\u0000PE crystals reveal a larger Young modulus when the deformation direction is\u0000perpendicular to the global stem direction. At large strains, the memory of the\u0000initial topology plays little role in the mechanical response and is observed\u0000to be completely destroyed. Short chain branching appears to suppress\u0000disentanglement and shear induced alignment of the chains during deformation.\u0000As a result, tie-chains and entanglements persist in branched systems and the\u0000peak stress at failure is found to be proportional to the change in number of\u0000tie-chains from the beginning of the brittle break to its end. Our findings\u0000suggest the remarkable mechanical properties of bimodal branched PE result\u0000directly from tie-chains, with entanglements playing a secondary role in the\u0000mechanical response.","PeriodicalId":501146,"journal":{"name":"arXiv - PHYS - Soft Condensed Matter","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142256867","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0