Chinese Journal of Polymer Science最新文献

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Fabrication of Polytetrafluoroethylene Aerogels with Excellent Sound Absorption and Thermal Insulation 聚四氟乙烯吸声隔热气凝胶的制备
IF 4 2区 化学
Chinese Journal of Polymer Science Pub Date : 2025-04-08 DOI: 10.1007/s10118-025-3317-7
Cong-Cong Li, You-Lei Tu, Shao-Yun Guo, Jia-Bin Shen
{"title":"Fabrication of Polytetrafluoroethylene Aerogels with Excellent Sound Absorption and Thermal Insulation","authors":"Cong-Cong Li,&nbsp;You-Lei Tu,&nbsp;Shao-Yun Guo,&nbsp;Jia-Bin Shen","doi":"10.1007/s10118-025-3317-7","DOIUrl":"10.1007/s10118-025-3317-7","url":null,"abstract":"<div><p>As the application scenarios of aerogels expand, higher requirements are put forward for the materials used to prepare aerogels. Due to the unique chemical structure, polytetrafluoroethylene (PTFE) has excellent properties such as high-temperature resistance, hydrophobicity, and chemical stability. However, the PTFE aerogels are difficult to be molded due to the weak interaction between resin particles. In this work, poly(ethylene oxide) (PEO) was selected as the carrier to assist the PTFE aerogels molding. The pure PTFE aerogels were prepared by homogeneously mixing PTFE aqueous dispersion and PEO, freeze-drying, and high-temperature sintering. When the mass fraction of PTFE and PEO were appropriate, the porosity of PTFE aerogels exceeded 90% and had a hierarchical honeycomb structure. Results showed that the PTFE aerogels not only had excellent hydrophobicity but also possessed superior acoustic insulation, mechanical strength, thermal insulation, and heat resistance properties. Specifically, the water contact angle is about 140°. The noise reduction coefficient is 0.34 and the average sound absorption coefficient is greater than 88% in the frequency range of 2000–6400 Hz. Meanwhile, the thermal conductivity in the air is about 0.045 W/(m·K), and the initial thermal decomposition temperature is 450 °C. More importantly, the PTFE aerogels had excellent temperature and corrosion resistance. Even after extremely thermal and chemical treatment, they remained unchanged porous structure as well as acoustic and thermal insulation properties, which exhibits great potential for application in many harsh environments.</p></div>","PeriodicalId":517,"journal":{"name":"Chinese Journal of Polymer Science","volume":"43 5","pages":"808 - 818"},"PeriodicalIF":4.0,"publicationDate":"2025-04-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145163328","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Advances in Surface Materials for Resisting Snow and Freezing Disasters 抗冰雪灾害地面材料研究进展
IF 4 2区 化学
Chinese Journal of Polymer Science Pub Date : 2025-04-08 DOI: 10.1007/s10118-025-3320-z
Xin-Nuo Wu, Xue-Ying Zhao, Jie Liu
{"title":"Advances in Surface Materials for Resisting Snow and Freezing Disasters","authors":"Xin-Nuo Wu,&nbsp;Xue-Ying Zhao,&nbsp;Jie Liu","doi":"10.1007/s10118-025-3320-z","DOIUrl":"10.1007/s10118-025-3320-z","url":null,"abstract":"<div><p>Snow and freezing disasters are recurrent weather and climate phenomena that affect the world annually. These events exert a significant influence on numerous aspects of life, including transportation, power supply, and daily activities, and result in considerable economic losses. This study aims to provide a comprehensive analysis of the regions affected by these disasters, the preventive and responsive measures employed, recent advancements in key materials, and the challenges encountered. By doing so, we can gain a deeper understanding of the vital role, significant advantages, and untapped potential of key materials for effectively preventing and responding to snow and freezing disasters. Furthermore, promoting research and utilization of these materials not only contributes to the development of the safety and emergency equipment industry but also strengthens the supply of advanced and suitable safety and emergency equipment.</p></div>","PeriodicalId":517,"journal":{"name":"Chinese Journal of Polymer Science","volume":"43 7","pages":"1068 - 1088"},"PeriodicalIF":4.0,"publicationDate":"2025-04-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145142924","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Design and Synthesis of Bis-β-ketoimine Binuclear Titanium Complex Isomers to Probe Bimetallic Synergistic Effect for Ethylene Polymerization 双-β-酮亚胺双核钛配合物异构体的设计与合成及对乙烯聚合双金属协同效应的研究
IF 4 2区 化学
Chinese Journal of Polymer Science Pub Date : 2025-04-07 DOI: 10.1007/s10118-025-3312-z
Ming Zhou, Meng-Yuan Xue, Ping-Zhou Huang, Ting-Cheng Li, Qing-Liang You, Guang-Yong Xie
{"title":"Design and Synthesis of Bis-β-ketoimine Binuclear Titanium Complex Isomers to Probe Bimetallic Synergistic Effect for Ethylene Polymerization","authors":"Ming Zhou,&nbsp;Meng-Yuan Xue,&nbsp;Ping-Zhou Huang,&nbsp;Ting-Cheng Li,&nbsp;Qing-Liang You,&nbsp;Guang-Yong Xie","doi":"10.1007/s10118-025-3312-z","DOIUrl":"10.1007/s10118-025-3312-z","url":null,"abstract":"<div><p>Binuclear complexes have attracted extensive attention in fields such as catalysis because of their likely bimetallic synergistic effect; however, the mechanism and factors influencing this synergism remain unclear. In this work, six bis-<i>β</i>-ketoimine binuclear titanium complexes <b>4a–4f</b> containing different alkylthio sidearms and configurations were synthesized and characterized by nuclear magnetic resonance hydrogen spectrum (<sup>1</sup>H-NMR), nuclear magnetic resonance carbon spectrum (<sup>13</sup>C-NMR), Fourier transform infrared spectrum (FTIR), and elemental analysis. The intermetallic distances of isomeric complexes <b>4a, 4d, 4e</b> and <b>4f</b> determined through density functional theory (DFT) optimization were in the order <b>4a</b>&lt;<b>4d</b>&lt;<b>4e</b>&lt;<b>4f</b> and were found to significantly influence the catalytic performance for ethylene (co)polymerization. These complexes could efficiently catalyze ethylene polymerization and ethylene/1-hexene or ethylene/1-octene copolymerization with high activity to produce high-molecular-weight ethylene homo- and co-polymers. Among the three binuclear titanium complexes <b>4a–4c</b> with similar structures but different lengths of alkylthio sidearms, complex <b>4a</b>, which contained the shortest methylthio sidearm, exhibited the highest activity for ethylene polymerization and copolymerization with 1-hexene or 1-octene. Additionally, for ethylene/1-hexene or ethylene/1-octene copolymerization, it showed the highest comonomer incorporation compared with propylthio (<b>4b</b>) and octylthio (<b>4c</b>) derivatives because of the smaller steric hindrance of the methyl group in <b>4a</b> and the more open coordination space for vinyl monomers. Furthermore, among the isomeric complexes <b>4a, 4d, 4e</b> and <b>4f</b>, complex <b>4a</b> with the shortest bimetallic distance also exhibited the highest activity towards ethylene (co)polymerization, and the highest 1-hexene or 1-octene incorporation in comparison with its regioisomeric counterparts <b>4d, 4e</b> and <i>p</i>-phenyl-bridged analog <b>4f</b>, owing to a more appropriate bimetallic distance that is conducive to a synergistic effect.</p></div>","PeriodicalId":517,"journal":{"name":"Chinese Journal of Polymer Science","volume":"43 5","pages":"756 - 768"},"PeriodicalIF":4.0,"publicationDate":"2025-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145162884","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Swelling, Interfacial Behavior, and Rheology of Soft Core-Shell Microgels Introducing Acid Isomer for pH–Temperature Dual-responsiveness 引入酸异构体的软核-壳微凝胶的溶胀、界面行为和流变学
IF 4 2区 化学
Chinese Journal of Polymer Science Pub Date : 2025-04-07 DOI: 10.1007/s10118-025-3310-1
Li Zhang, Xin-Rui Li, Xia-Hui Xiao, Li-Dan Zhou, Yu-Wei Zhu, Jia-Yu Chen, Hang Jiang, Jie Han, Wei Liu, To Ngai
{"title":"Swelling, Interfacial Behavior, and Rheology of Soft Core-Shell Microgels Introducing Acid Isomer for pH–Temperature Dual-responsiveness","authors":"Li Zhang,&nbsp;Xin-Rui Li,&nbsp;Xia-Hui Xiao,&nbsp;Li-Dan Zhou,&nbsp;Yu-Wei Zhu,&nbsp;Jia-Yu Chen,&nbsp;Hang Jiang,&nbsp;Jie Han,&nbsp;Wei Liu,&nbsp;To Ngai","doi":"10.1007/s10118-025-3310-1","DOIUrl":"10.1007/s10118-025-3310-1","url":null,"abstract":"<div><p>In this study, a pair of dicarboxylic acids as <i>cis-trans</i> isomerism—citraconic acid (CA) and mesaconic acid (MA), was incorporated into polymeric networks of poly(<i>N</i>-isopropylacrylamide) (PNIPAM)-based core-shell microgels <i>via</i> semi-batch precipitation polymerization. We demonstrated that the pH-temperature dual responsiveness of the core-shell microgels is highly correlated with the structure and position of the acid isomers. Both the <i>cis-trans</i> molecular structure and the crosslinking position of the dicarboxylic acids significantly influenced the hydration capacity and surface charge density of the core-shell microgels. These diverse properties first influenced the swelling behavior, further affecting the interfacial behavior of the microgels, including the oil-water dynamic interfacial tension and air-water compression isotherms. Furthermore, the rheological behavior of the microgel suspensions also displayed distinct dependences on the frequency and temperature, illustrating that the <i>cis-trans</i> molecular structure and crosslinked position of the dicarboxylic acids also significantly influenced the interparticle clustering in the bulk solution. Our results suggest that the pH sensitivity of the <i>cis-trans</i> dicarboxylic acid isomer affects the ionization and surface charge distribution of the core or shell layers of individual microgels, which further determines the interparticle interaction and cooperative rearrangement at interfaces and in the bulk.</p></div>","PeriodicalId":517,"journal":{"name":"Chinese Journal of Polymer Science","volume":"43 5","pages":"745 - 755"},"PeriodicalIF":4.0,"publicationDate":"2025-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145162405","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Constructing High-content, Highly Ordered Shish-Kebab Crystals during Hot-stretching via Varying Contents of Reserved Shish in Ultra-long Chain Ultra-high Molecular Weight Polyethylene Gel Systems 在超长链超高分子量聚乙烯凝胶体系中,通过改变保留鱼的含量来构建高含量、高有序的羊肉串晶体
IF 4 2区 化学
Chinese Journal of Polymer Science Pub Date : 2025-04-07 DOI: 10.1007/s10118-025-3308-8
Chao-Wei Xing, Qiu-Yue Cui, Jia-Wei Gao, Ye-Shun Zhong, Jia-Jun Tang, Zi-Hao Gao, Yi-Guo Li, Zong-Bao Wang
{"title":"Constructing High-content, Highly Ordered Shish-Kebab Crystals during Hot-stretching via Varying Contents of Reserved Shish in Ultra-long Chain Ultra-high Molecular Weight Polyethylene Gel Systems","authors":"Chao-Wei Xing,&nbsp;Qiu-Yue Cui,&nbsp;Jia-Wei Gao,&nbsp;Ye-Shun Zhong,&nbsp;Jia-Jun Tang,&nbsp;Zi-Hao Gao,&nbsp;Yi-Guo Li,&nbsp;Zong-Bao Wang","doi":"10.1007/s10118-025-3308-8","DOIUrl":"10.1007/s10118-025-3308-8","url":null,"abstract":"<div><p>Ultra-high molecular weight polyethylene (UHMWPE) is widely utilized in low-dimensional materials due to its ultra-long chain imparted excellent strength and modulus. By employing gel-molding technology with a gradient temperature control, this study successfully produced gel films with varying shish crystal contents of the UHMWPE with a molecular weight of 8.0 million. The structural evolution during film hot-stretching was investigated by <i>in-situ</i> wide-angle X-ray diffraction (WAXD), small-angle X-ray scattering (SAXS), ultra-small-angle X-ray scattering (USAXS), and <i>ex-situ</i> methods of scanning electron microscopy (SEM) and differential scanning calorimetry (DSC). The ultra-long molecular chains delay stress transfer during stretching but provide more nucleation sites for shish-kebab crystallization to form well-ordered shish-kebab crystals under high strain. The reserved high-content shish facilitates structural evolution, inducing the formation of highly-ordered shish-kebab crystals that eventually transfer into shish crystals in the later stage of stretching. The samples with low shish content, although the structural evolution is facilitated during stretching, predominantly result in newly formed shish-kebab crystals through melt recrystallization. However, some unoriented lamellae persists in unreserved samples stretching progress, leading to less ordered shish-kebab structures. By comparing with previous work of UHMWPE with low molecular weights, we demonstrate that the ultra-long molecular chains also play a key role on enabling the construction of highly-ordered shish-kebab crystals with high shish content during hot-stretching of UHMWPE gel films, providing new insights into processing control and optimization for engineering applications.</p></div>","PeriodicalId":517,"journal":{"name":"Chinese Journal of Polymer Science","volume":"43 5","pages":"778 - 792"},"PeriodicalIF":4.0,"publicationDate":"2025-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145162888","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Benzo[1,2-b:4,5-b′]difuran-based Narrow Bandgap Polymers for Efficient Organic Solar Cells Using Perylene Diimides-type Nonfullerene Acceptors 基于苝二亚胺类非富勒烯受体的苯并[1,2-b:4,5-b ']二呋喃基窄带隙聚合物用于高效有机太阳能电池
IF 4 2区 化学
Chinese Journal of Polymer Science Pub Date : 2025-04-03 DOI: 10.1007/s10118-025-3318-6
Zhen-Yu Wu, Jun-Feng Liu, Xin-Zhu Tong, Yan-Jie Sun, Xun-Chang Wang, Ren-Qiang Yang, Xiang Gao, Ming Shao, Peng-Cheng Li, Zhi-Tian Liu
{"title":"Benzo[1,2-b:4,5-b′]difuran-based Narrow Bandgap Polymers for Efficient Organic Solar Cells Using Perylene Diimides-type Nonfullerene Acceptors","authors":"Zhen-Yu Wu,&nbsp;Jun-Feng Liu,&nbsp;Xin-Zhu Tong,&nbsp;Yan-Jie Sun,&nbsp;Xun-Chang Wang,&nbsp;Ren-Qiang Yang,&nbsp;Xiang Gao,&nbsp;Ming Shao,&nbsp;Peng-Cheng Li,&nbsp;Zhi-Tian Liu","doi":"10.1007/s10118-025-3318-6","DOIUrl":"10.1007/s10118-025-3318-6","url":null,"abstract":"<div><p>The development of narrow-bandgap polymer donors with complementary absorption and matched energy levels for perylene diimides (PDI)-based nonfullerene acceptors (NFAs) has received little attention. The high-lying highest occupied molecular orbital (HOMO) level and low degree of crystallinity of the star donor polymer PCE10 limit its application in PDI-based Organic solar cells (OSCs). In this study, two benzo[1,2-b:4,5-b′]difuran (BDF)-based narrow-bandgap polymer donors, PBDF and PBDFCl, were synthesized to improve the photovoltaic performance of PDI-based OSCs. The smaller BDF moiety with higher electronegativity endows the resulting polymers with stronger aggregation and lower HOMO energy levels. The power conversion efficiency (PCE) value of the PBDF:Ph(PDI)<sub>3</sub>-based OSCs was 7.24%, which is much higher than that of PCE10-based OSCs (6.09%). Further chlorination of the conjugated side chain elevated the PCE to 8.84%, which is 1.4 times higher than that of PCE10-based OSCs. These results demonstrate the significant contribution of designing novel narrow-bandgap polymer donors to boost the PCE of PDI-based OSCs and highlight the importance of matching the aggregation behaviors of polymeric donor materials with that of NFAs.</p></div>","PeriodicalId":517,"journal":{"name":"Chinese Journal of Polymer Science","volume":"43 5","pages":"711 - 717"},"PeriodicalIF":4.0,"publicationDate":"2025-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145161032","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Synthesis and Properties of Heat-resistant Polyimides Films Containing Crosslinkable Group-tetrafluorostyrene 含交联基-四氟苯乙烯耐热聚酰亚胺薄膜的合成及性能研究
IF 4 2区 化学
Chinese Journal of Polymer Science Pub Date : 2025-04-03 DOI: 10.1007/s10118-025-3292-z
Tian-Yong Zhang, Jia-Ning Yu, Sui-Sui Wang, Ya-Mei Chai, Shuang Jiang, Hong-Li An, Ruo-Xi Sun, Bin Li
{"title":"Synthesis and Properties of Heat-resistant Polyimides Films Containing Crosslinkable Group-tetrafluorostyrene","authors":"Tian-Yong Zhang,&nbsp;Jia-Ning Yu,&nbsp;Sui-Sui Wang,&nbsp;Ya-Mei Chai,&nbsp;Shuang Jiang,&nbsp;Hong-Li An,&nbsp;Ruo-Xi Sun,&nbsp;Bin Li","doi":"10.1007/s10118-025-3292-z","DOIUrl":"10.1007/s10118-025-3292-z","url":null,"abstract":"<div><p>Polyimide (PI) is widely used in high-tech fields such as microelectronics, aerospace, and national defense because of its excellent optical properties, high- and low-temperature resistance, and good dimensional stability. To achieve the desired properties of PI, the monomers 2,6-diaminopyrimidin-4-ol (DAPD) and 6-(2,3,5,6-tetrafluoro-4-vinylphenoxy) pyrimidin-2,4-diamine (DAFPD), which contains crosslinkable functional groups, were designed and synthesized successfully and copolymerized with 4,4′-oxydianiline (ODA) and 4,4-hexafluoroisopropylphthalic anhydride (6FDA). The prepared PI film (PI-3), with rigid backbones and loose packing had excellent heat resistance (<i>T</i><sub>d5%</sub>=489 °C) and optical properties (<i>T</i><sub>450</sub>=82%). Furthermore, a crosslinked PI film (c-PI-3) with more heat-resistant (<i>T</i><sub>d5%</sub>=524 °C) and better mechanical properties (σ=125.46 MPa), can be obtained through thermal crosslinking of tetrafluorostyrene. In addition, the changes in the properties caused by the proportion of DAFPD added during copolymerization are discussed comprehensively. This study provides a promising candidate for heat-resistant PI materials.</p></div>","PeriodicalId":517,"journal":{"name":"Chinese Journal of Polymer Science","volume":"43 5","pages":"863 - 874"},"PeriodicalIF":4.0,"publicationDate":"2025-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145160969","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Interfacial Elastic Film with Temperature Mediated-phase Transition Behavior for Tunable Suspended Sensing 具有温度介导相变行为的界面弹性膜用于可调悬浮传感
IF 4 2区 化学
Chinese Journal of Polymer Science Pub Date : 2025-04-03 DOI: 10.1007/s10118-025-3314-x
Wei Zhou, Yue Han, Peng Xiao, Yi Yu, Yu-Chao Wang, Tao Chen
{"title":"Interfacial Elastic Film with Temperature Mediated-phase Transition Behavior for Tunable Suspended Sensing","authors":"Wei Zhou,&nbsp;Yue Han,&nbsp;Peng Xiao,&nbsp;Yi Yu,&nbsp;Yu-Chao Wang,&nbsp;Tao Chen","doi":"10.1007/s10118-025-3314-x","DOIUrl":"10.1007/s10118-025-3314-x","url":null,"abstract":"<div><p>Controllably tuning the sensing performance of flexible mechanical sensors is important for them to realize on-demand sensing of various mechanical stimuli in different application scenarios. However, current regulating strategies focus on the construction process of individual sensors, the response performance of the as-formed sensors is still hard to autonomously tune with external stimulus changes like human skin. Here, we propose a new strategy that realizes post-tuning of the sensing performance by introducing a temperature-dependent phase transition elastomer into the sensing film. Through an interfacially confined photopolymerization reaction, a graphene-based phase-transition elastomeric (GPTE) film with a robust interface and excellent conductivity is well-formed at the water/air interface. Benefiting from the crystallization-melt dynamic switching in the elastomer network, the GPTE film could experience the reversible transformation between soft (1.65 MPa) and stiff (12.27 MPa) states, showing huge changes of elastic modulus up to seven times near the phase transition temperature (28.5 °C). Furthermore, the GPTE film is designed into a suspended perceptual configuration realizing the dynamic detection of 3D deformation adapted to temperature changes with up to 3.5-fold difference in response sensitivity. Finally, the self-adaptive sensing behavior of temperature-mediated 3D deformation is demonstrated by the effective detection of the dynamic stimulation process of cold and hot water droplets by the GPTE suspended film. The proposed strategy of phase transition-induced post-tuning of sensing performance could greatly facilitate flexible mechanical sensors towards a more intelligent one.</p></div>","PeriodicalId":517,"journal":{"name":"Chinese Journal of Polymer Science","volume":"43 7","pages":"1155 - 1162"},"PeriodicalIF":4.0,"publicationDate":"2025-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145160964","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Dynamics of Drying Process of Poly(ethylene oxide) Solution Investigated by 3D Digital Holographic Microscopy 三维数字全息显微镜研究聚环氧乙烷溶液干燥过程动力学
IF 4 2区 化学
Chinese Journal of Polymer Science Pub Date : 2025-04-01 DOI: 10.1007/s10118-025-3319-5
Sheng-Pei Shao, Xiao Liang, Li-Jun Liu, Jun-Peng Zhao, Xiang-Jun Gong, Guang-Zhao Zhang
{"title":"Dynamics of Drying Process of Poly(ethylene oxide) Solution Investigated by 3D Digital Holographic Microscopy","authors":"Sheng-Pei Shao,&nbsp;Xiao Liang,&nbsp;Li-Jun Liu,&nbsp;Jun-Peng Zhao,&nbsp;Xiang-Jun Gong,&nbsp;Guang-Zhao Zhang","doi":"10.1007/s10118-025-3319-5","DOIUrl":"10.1007/s10118-025-3319-5","url":null,"abstract":"<div><p>The dynamics of the drying process of polymer solutions are important for the development of coatings and films. In the present work, digital holographic microscopy (DHM) was performed to capture the drying dynamics of poly(ethylene oxide) (PEO) droplets using a gold nanoparticle tracer, where the heterogeneous flow field in different regions was illustrated. This demonstrates that the gold nanoparticles at either the center or the edge regions of the droplet exhibit anisotropic kinematic behavior. At early stage, Marangoni backflow causes gold nanoparticles to move towards the edge firstly, and the circles back towards the droplet center after arriving the contact line with a sudden increase in <i>z</i> axis for 10.4 µm, indicating the scale of the upward-moving microscopic flow vortices. This phenomenon does not occur in water droplets in the absence of polymers. The gold nanoparticles underwent Brownian-like motion at the center of the PEO droplet or water droplet owing to the low perturbation of the flow field. At the late stage of pinning of the PEO droplets, the motion showed multiple reverses in the direction of the gold nanoparticles, indicating the complexity of the flow field. This study enhances the understanding of the drying dynamics of polymer solution droplets and offers valuable insights into the fabrication of surface materials.</p></div>","PeriodicalId":517,"journal":{"name":"Chinese Journal of Polymer Science","volume":"43 7","pages":"1170 - 1180"},"PeriodicalIF":4.0,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145160702","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Optimization of Extrusion-based Silicone Additive Manufacturing Process Parameters Based on Improved Kernel Extreme Learning Machine 基于改进核极限学习机的挤出型有机硅增材制造工艺参数优化
IF 4 2区 化学
Chinese Journal of Polymer Science Pub Date : 2025-03-13 DOI: 10.1007/s10118-025-3306-x
Zi-Ning Li, Xiao-Qing Tian, Dingyifei Ma, Shahid Hussain, Lian Xia, Jiang Han
{"title":"Optimization of Extrusion-based Silicone Additive Manufacturing Process Parameters Based on Improved Kernel Extreme Learning Machine","authors":"Zi-Ning Li,&nbsp;Xiao-Qing Tian,&nbsp;Dingyifei Ma,&nbsp;Shahid Hussain,&nbsp;Lian Xia,&nbsp;Jiang Han","doi":"10.1007/s10118-025-3306-x","DOIUrl":"10.1007/s10118-025-3306-x","url":null,"abstract":"<div><p>Silicone material extrusion (MEX) is widely used for processing liquids and pastes. Owing to the uneven linewidth and elastic extrusion deformation caused by material accumulation, products may exhibit geometric errors and performance defects, leading to a decline in product quality and affecting its service life. This study proposes a process parameter optimization method that considers the mechanical properties of printed specimens and production costs. To improve the quality of silicone printing samples and reduce production costs, three machine learning models, kernel extreme learning machine (KELM), support vector regression (SVR), and random forest (RF), were developed to predict these three factors. Training data were obtained through a complete factorial experiment. A new dataset is obtained using the Euclidean distance method, which assigns the elimination factor. It is trained with Bayesian optimization algorithms for parameter optimization, the new dataset is input into the improved double Gaussian extreme learning machine, and finally obtains the improved KELM model. The results showed improved prediction accuracy over SVR and RF. Furthermore, a multi-objective optimization framework was proposed by combining genetic algorithm technology with the improved KELM model. The effectiveness and reasonableness of the model algorithm were verified by comparing the optimized results with the experimental results.</p></div>","PeriodicalId":517,"journal":{"name":"Chinese Journal of Polymer Science","volume":"43 5","pages":"848 - 862"},"PeriodicalIF":4.0,"publicationDate":"2025-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145164671","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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