Reduction of the Thermal Conductivity of Polyurethanes by Fluorination: Impact of Crystallinity, Atomic Density, and Sound Velocity DOI Creative Commons
Jingyi Zhou, Chen Chen, Jinchi Sun

et al.

Angewandte Chemie, Journal Year: 2025, Volume and Issue: unknown

Published: April 25, 2025

Abstract The intrinsic thermal conductivity () of polymers ranges between 0.13 W m −1 K in amorphous polyvinyl chloride to 60 ultrahigh molecular weight polyethylene. Increasing the content further lower is insufficient as this approach reaches a practical limit at approximately 0.15 . Inspired by low and speed sound fluorinated liquids, we explored whether behavior liquids can be extended polymers. We synthesized seven partially (9%–17% atomic fraction F) ten conventional polyurethanes. Fluorinated polyurethanes exhibit reduction up 50% compared their nonfluorinated counterparts. Microstructural analysis revealed that exhibited reduced crystallinity increased spacing. Furthermore, observed decreased forced Brillouin scattering via new method captures weak signals from highly semicrystalline lowest conductivity, room temperature, was polyurethane 2,2,3,3,4,4,5,5‐octafluoro‐1,6‐hexanediol (16F) isophorone diisocyanate (IPDI). Our study provides deeper insights into relationship , microstructure, chemical structure, paving way rational design with below

Language: Английский

Recent Advances in the Preparation and Application of Bio-Based Polyurethanes DOI Open Access

Ya Mo,

Xiaoyue Huang,

Chuanqun Hu

et al.

Polymers, Journal Year: 2024, Volume and Issue: 16(15), P. 2155 - 2155

Published: July 29, 2024

Amid environmental pollution and resource depletion, developing utilizing biomass resources as alternatives to petroleum is a prominent research focus. Driven by protection sustainable development, the shift from petroleum-based bio-based polyurethane prevailing trend in material development. Biomass sources such vegetable oil, polysaccharides, lignin offer extensive application prospects production. Functional modifications of these polyurethanes can further expand their range. This article explores preparation various polyurethanes, applications across different fields, anticipated future development uses.

Language: Английский

Citations

6
Research on the Application of New Building Recycled Insulation Materials for Walls DOI Open Access
Yan Liu,

Qinglong Zhao,

Gu Xiaohua

et al.

Polymers, Journal Year: 2024, Volume and Issue: 16(15), P. 2122 - 2122

Published: July 25, 2024

In this paper, a new type of recycled polyurethane material is used as wall insulation material, and the building made paper has high efficiency thermal energy-saving characteristics also certain environmental significance. The conductivity cold 0.023 W/(m·K), prepared 0.297 W/(m·K). Compared with traditional double-sided plastered porous tiles, it can save 85.4% energy consumption per square meter, higher economic benefits. preparation proposed in provides green way for insulation.

Language: Английский

Citations

5
Clinical study on the application effect of improved polyetheretherketone cranial plate in cranioplasty DOI Creative Commons

Jiajun Qin,

Fei Xue,

Jin Fu

et al.

Biointerphases, Journal Year: 2025, Volume and Issue: 20(1)

Published: Jan. 1, 2025

This study evaluates the clinical outcomes associated with use of an improved polyetheretherketone (PEEK) cranial plate in cranioplasty surgery. A total 104 patients were involved, significant findings revealing a reduced incidence postoperative adverse reactions PEEK group (28.85%) compared to conventional (50.00%, P = 0.027). Patient satisfaction rates markedly higher cohort (P < 0.05). Although medical expenses for enhanced greater (¥ 144 600 ± 21 200 vs ¥ 127 400 20 100, 0.05), there no notable differences cerebral blood flow perfusion or survival time between two groups > The conclusions indicate that while plates incur upfront costs, their benefits terms safety and patient satisfaction, along implant stability bone healing, support practice. Consequently, upgraded material is recommended procedures.

Language: Английский

Citations

0
Multifaceted Exploration of Wood Biomass-Derived Nanomaterials for Biomedicine Approach DOI
K. Anbarasu,

Mary Anjalin Francis,

S. Madhu

et al.

Regenerative Engineering and Translational Medicine, Journal Year: 2025, Volume and Issue: unknown

Published: March 17, 2025

Language: Английский

Citations

0
Global Hotspots and Development Trends in the New Generation of Artificial Heart Valves: A Bibliometric Analysis from 1991 to 2024 DOI
Shiping Chen, Jiamin Peng, Zhiyi Ye

et al.

Published: Jan. 1, 2025

Valvular heart disease (VHD) is a major cause of morbidity and mortality worldwide. To address the limitation clinically available valve prostheses, new-generation artificial valves (AHVs) have experienced tremendous technical evolution could become promising therapeutic alternative. This paper aims to explore research foundation, hotspots, trends in field AHVs last three decades from perspective structural temporal dynamics. The 1,314 publications total were indexed Web Science serving as sample; while bibliometric analysis was conducted by utilizing Citespace software for detecting visualizing. presented steadily increasing publications, close collaboration between countries, institutions, authors, disciplines, which led continuously evolving hotspots reflected burst analysis. Three active clusters, namely VHD (aortic stenosis infective endocarditis), tissue engineered (decellularization, cells nanofiber) polymeric (polyurethane special design). It demonstrated that classical concepts engineering, extracellular matrix calcification; emerging hotpots included immune response, hydrogels, elastomeric scaffolds, trilayered, transcatheter; latest keywords 3D printing fluid-structure interaction. According objective results analysis, we summarized more focus should be put on pathological mechanisms explants analysis; challenges future directions exploration new synthetic materials composite materials, multi-scale accurate structure design, rapid customized manufacture, modulating along with numerical simulation experimental validation.

Language: Английский

Citations

0
Reduction of the Thermal Conductivity of Polyurethanes by Fluorination: Impact of Crystallinity, Atomic Density, and Sound Velocity DOI Creative Commons
Jingyi Zhou, Chen Chen, Jinchi Sun

et al.

Angewandte Chemie International Edition, Journal Year: 2025, Volume and Issue: unknown

Published: April 25, 2025

Abstract The intrinsic thermal conductivity () of polymers ranges between 0.13 W m −1 K in amorphous polyvinyl chloride to 60 ultrahigh molecular weight polyethylene. Increasing the content further lower is insufficient as this approach reaches a practical limit at approximately 0.15 . Inspired by low and speed sound fluorinated liquids, we explored whether behavior liquids can be extended polymers. We synthesized seven partially (9%–17% atomic fraction F) ten conventional polyurethanes. Fluorinated polyurethanes exhibit reduction up 50% compared their nonfluorinated counterparts. Microstructural analysis revealed that exhibited reduced crystallinity increased spacing. Furthermore, observed decreased forced Brillouin scattering via new method captures weak signals from highly semicrystalline lowest conductivity, room temperature, was polyurethane 2,2,3,3,4,4,5,5‐octafluoro‐1,6‐hexanediol (16F) isophorone diisocyanate (IPDI). Our study provides deeper insights into relationship , microstructure, chemical structure, paving way rational design with below

Language: Английский

Citations

0
Reduction of the Thermal Conductivity of Polyurethanes by Fluorination: Impact of Crystallinity, Atomic Density, and Sound Velocity DOI Creative Commons
Jingyi Zhou, Chen Chen, Jinchi Sun

et al.

Angewandte Chemie, Journal Year: 2025, Volume and Issue: unknown

Published: April 25, 2025

Abstract The intrinsic thermal conductivity () of polymers ranges between 0.13 W m −1 K in amorphous polyvinyl chloride to 60 ultrahigh molecular weight polyethylene. Increasing the content further lower is insufficient as this approach reaches a practical limit at approximately 0.15 . Inspired by low and speed sound fluorinated liquids, we explored whether behavior liquids can be extended polymers. We synthesized seven partially (9%–17% atomic fraction F) ten conventional polyurethanes. Fluorinated polyurethanes exhibit reduction up 50% compared their nonfluorinated counterparts. Microstructural analysis revealed that exhibited reduced crystallinity increased spacing. Furthermore, observed decreased forced Brillouin scattering via new method captures weak signals from highly semicrystalline lowest conductivity, room temperature, was polyurethane 2,2,3,3,4,4,5,5‐octafluoro‐1,6‐hexanediol (16F) isophorone diisocyanate (IPDI). Our study provides deeper insights into relationship , microstructure, chemical structure, paving way rational design with below

Language: Английский

Citations

0