Wrinkled thermoplastic polyamide elastomer foams with enhanced mechanical properties fabricated by dynamic supercritical CO2 foaming DOI Open Access
Weipeng Zhong,

Xu Zhou,

Miaomiao Zhang

et al.

Polymer Engineering and Science, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 31, 2024

Abstract Wrinkled foams (WF), distinguished by their numerous cell wall wrinkles, exhibit superior impact resistance compared to conventional (CF), making them ideal for applications such as sports protection and packaging. Despite potential, the mechanisms behind wrinkle formation remain underexplored, limiting production process optimization. In this study, we use a custom supercritical foaming reactor with sapphire glass viewing window investigate differences between wrinkled thermoplastic polyamide elastomer foams. Our findings suggest that “excessive expansion‐shrinkage” is crucial development. Molecular dynamics simulations reveal molecular chains align flow field of dynamic CO 2 , which increases intramolecular stress. The release stress triggers formation, driven thermodynamic instability. Furthermore, comparisons compression performance WF CF show structures alter deformation behavior under force. wrinkles facilitate increased collision, squeezing, friction walls, thus dissipating energy heat creating “micro‐air units” enhance cushioning capability. These distinctive characteristics make promising material high‐performance in absorption, Highlights are fabricated scCO foaming. Chain stretching shrinkage verified MD simulation. Excessive expansion‐shrinkage causes structure. structure greatly absorption ability.

Language: Английский

Shortening the Saturation Time of PBAT Sheet Foaming via the Pre-Introducing of Microporous Structures DOI Open Access

Fangwei Tian,

Junjie Jiang, Yaozong Li

et al.

Materials, Journal Year: 2025, Volume and Issue: 18(5), P. 1044 - 1044

Published: Feb. 26, 2025

Poly (butylene adipate-co-terephthalate) (PBAT) foam sheets prepared by foaming supercritical fluids are characterized high resilience, homogeneous cellular structure, and well-defined biodegradability. However, the inert chemical structure rigid hard segments restrict diffusion of CO2 within PBAT matrix, resulting in extremely long gas saturation times as 9 h at a thickness 12 mm. In this study, microporous structures were pre-introduced into matrix to provide fast pathway during process. After 2 saturation, with expansion ratio 10 13.8 prepared. The interaction was systematically investigated, sorption process evaluated kinetically thermodynamically using Fickian theory. solubility rate pretreated different sizes densities effects pretreatment strategies on behavior cell discussed. introduction not only reduces time but also enhances solubility, enabling successful preparation soft foams ratios resilience. undergoing treatment, μm density 0.45 g/cm3 demonstrated improved mechanical properties: their hardness decreased 35 C while resilience increased 58%, reflecting enhanced elastic recovery capabilities. method, which increases sheets, offers straightforward approach that provides valuable insights achieving rapid efficient thick industrial applications.

Language: Английский

Citations

1
A novel bionic dual-layer decorative membrane approach for suppressing interfacial defects in combined in-mold decoration and microcellular injection molding DOI
Shengrui Yu, Tianyu Zhang, Lei Xu

et al.

Colloids and Surfaces A Physicochemical and Engineering Aspects, Journal Year: 2025, Volume and Issue: unknown, P. 136889 - 136889

Published: April 1, 2025

Language: Английский

Citations

1
Elastomer foams with switchable folded cellular structure for EMI shielding, comprehensive sealing, and cushioning protection DOI
Hao Zheng, Xiaoqiang Pei, Pengke Huang

et al.

Chemical Engineering Journal, Journal Year: 2025, Volume and Issue: unknown, P. 161088 - 161088

Published: March 1, 2025

Language: Английский

Citations

1
Highly Heat-Resistant and Compression Strength Strong Co-cross-linked Acetylene-Based End-Capped Polyimide Foams Using a Norbornene-Based Blowing Agent DOI

Xianzhe Sheng,

Shuhuan Yun,

Xing Miao

et al.

Industrial & Engineering Chemistry Research, Journal Year: 2025, Volume and Issue: unknown

Published: April 18, 2025

Language: Английский

Citations

0
Caterpillar-inspired electromagnetic dual-function cuniculi composites for efficient broad bandwidth microwave absorption DOI
Xiao Li, Junpeng Ma,

Xu Zhou

et al.

Chemical Engineering Journal, Journal Year: 2025, Volume and Issue: unknown, P. 163559 - 163559

Published: May 1, 2025

Language: Английский

Citations

0
Wrinkled thermoplastic polyamide elastomer foams with enhanced mechanical properties fabricated by dynamic supercritical CO2 foaming DOI Open Access
Weipeng Zhong,

Xu Zhou,

Miaomiao Zhang

et al.

Polymer Engineering and Science, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 31, 2024

Abstract Wrinkled foams (WF), distinguished by their numerous cell wall wrinkles, exhibit superior impact resistance compared to conventional (CF), making them ideal for applications such as sports protection and packaging. Despite potential, the mechanisms behind wrinkle formation remain underexplored, limiting production process optimization. In this study, we use a custom supercritical foaming reactor with sapphire glass viewing window investigate differences between wrinkled thermoplastic polyamide elastomer foams. Our findings suggest that “excessive expansion‐shrinkage” is crucial development. Molecular dynamics simulations reveal molecular chains align flow field of dynamic CO 2 , which increases intramolecular stress. The release stress triggers formation, driven thermodynamic instability. Furthermore, comparisons compression performance WF CF show structures alter deformation behavior under force. wrinkles facilitate increased collision, squeezing, friction walls, thus dissipating energy heat creating “micro‐air units” enhance cushioning capability. These distinctive characteristics make promising material high‐performance in absorption, Highlights are fabricated scCO foaming. Chain stretching shrinkage verified MD simulation. Excessive expansion‐shrinkage causes structure. structure greatly absorption ability.

Language: Английский

Citations

0