Sustainable Bio-based Polyurethane Adhesives Utilizing PPG2000 and Renewable Polyols: Synthesis, Characterization, and Mechanical Properties DOI

Jin‐Gyu Min,

Won‐Bin Lim, Ju-Hong Lee

et al.

Research Square (Research Square), Journal Year: 2025, Volume and Issue: unknown

Published: April 2, 2025

Abstract Developing high-performance, sustainable adhesives for automotive, aerospace, and industrial applications remains a major challenge due to the inherent trade-off between mechanical strength thermal stability in bio-based materials. While previous studies have explored polyurethane (PU) adhesives, achieving superior adhesion durability challenging when compared petroleum-based counterparts. This study presents novel adhesive system utilizing polypropylene glycol (PPG2000), isophorone diisocyanate (IPDI), renewable polyols (isosorbide-derived polyols, diglycerol, glycerol). The were synthesized via controlled one-shot polymerization process with 4-tert-butylphenol as an end-capping agent, enabling precise modulation of crosslink density molecular architecture. Fourier-transform infrared (FT-IR) spectroscopy confirmed complete urethane bond formation, isocyanate group (NCO%) titration validated stoichiometric conversion. Gel permeation chromatography (GPC) revealed distinct weight distributions, which influence performance by affecting density, elasticity, depending on polyol structure. Thermal analysis showed that isosorbide-derived formulations exhibited up 25°C higher degradation onset temperature 10°C increase glass transition (Tg) adhesives. Meanwhile, containing diglycerol glycerol demonstrated 39% shear (32.5 MPa) 77% improved impact resistance (36.8 relative reference system, attributed optimized segmental mobility crosslinking effects. work establishes strategic framework designing while acknowledging limitations such potential variability raw material sources suggesting future research into long-term environmental performance, not only surpasses conventional systems but also aligns principles green chemistry innovation. These findings offer pathway next-generation structural applications.

Language: Английский

Temperature-Responsive Hybrid Composite with Zero Temperature Coefficient of Resistance for Wearable Thermotherapy Pads DOI Creative Commons

Ji-Yoon Ahn,

Dong-Kwan Lee,

Min‐Gi Kim

et al.

Micromachines, Journal Year: 2025, Volume and Issue: 16(1), P. 108 - 108

Published: Jan. 19, 2025

Carbon-based polymer composites are widely used in wearable devices due to their exceptional electrical conductivity and flexibility. However, temperature-dependent resistance variations pose significant challenges device safety performance. A negative temperature coefficient (NTC) can lead overcurrent risks, while a positive (PTC) compromises accuracy. In this study, we present novel hybrid composite combining carbon nanotubes (CNTs) with NTC properties black (CB) PTC achieve near-zero of (TCR) at an optimal ratio. This innovation enhances the reliability carbon-based for heating applications. Furthermore, thermochromic pigment layer is integrated into composite, enabling visual indication across three distinct zones. bilayer structure not only addresses TCR challenge but also provides real-time, user-friendly monitoring. The resulting demonstrates consistent performance high precision under diverse conditions, making it ideal thermotherapy pads. study highlights advancement developing multifunctional, temperature-responsive materials, offering promising solution safer more controllable devices.

Language: Английский

Citations

0
Biomimetic freestanding microfractals for flexible electronics DOI Creative Commons
Amit Barua, Rituporn Gogoi, Pulikanti Guruprasad Reddy

et al.

npj Flexible Electronics, Journal Year: 2025, Volume and Issue: 9(1)

Published: Feb. 14, 2025

Language: Английский

Citations

0
Robust charring construction of thermoplastic polyurethane: cyclotriphosphazene structure bearing alkynyl and its impacts on thermal degradation, burning behavior and toughness DOI

Yiwen Hao,

Yunxian Yang, Wen Chen

et al.

Polymer Degradation and Stability, Journal Year: 2025, Volume and Issue: unknown, P. 111279 - 111279

Published: Feb. 1, 2025

Language: Английский

Citations

0
Vegetable Oils for Material Applications – Available Biobased Compounds Seeking Their Utilities DOI Creative Commons
Vojtěch Jašek, Silvestr Figalla

ACS Polymers Au, Journal Year: 2025, Volume and Issue: unknown

Published: March 18, 2025

Materials derived from natural sources are demanded for future applications due to the combination of factors such as sustainability increase and legislature requirements. The availability efficient analysis vegetable oils (triacylglycerides) open an enormous potential incorporating these compounds into various products ensure ecological footprint decreases provide advantageous properties eventual products, flexibility, toughness, or exceptional hydrophobic character. double bonds located in many centers chemical functionalization, epoxidization, hydroxylation, nucleophile substitutions using acids anhydrides. Naturally occurring castor oil comprises a reactive vacant hydroxyl group, which can be modified via numerous approaches. This comprehensive Review provides overall insight toward multiple materials utilities functionalized glycerides additive manufacturing (3D printing), polyurethane (including their recycling), coatings, adhesives. work complex list investigated studied throughout available literature describes principles each selected application.

Language: Английский

Citations

0
Sustainable Bio-based Polyurethane Adhesives Utilizing PPG2000 and Renewable Polyols: Synthesis, Characterization, and Mechanical Properties DOI

Jin‐Gyu Min,

Won‐Bin Lim, Ju-Hong Lee

et al.

Research Square (Research Square), Journal Year: 2025, Volume and Issue: unknown

Published: April 2, 2025

Abstract Developing high-performance, sustainable adhesives for automotive, aerospace, and industrial applications remains a major challenge due to the inherent trade-off between mechanical strength thermal stability in bio-based materials. While previous studies have explored polyurethane (PU) adhesives, achieving superior adhesion durability challenging when compared petroleum-based counterparts. This study presents novel adhesive system utilizing polypropylene glycol (PPG2000), isophorone diisocyanate (IPDI), renewable polyols (isosorbide-derived polyols, diglycerol, glycerol). The were synthesized via controlled one-shot polymerization process with 4-tert-butylphenol as an end-capping agent, enabling precise modulation of crosslink density molecular architecture. Fourier-transform infrared (FT-IR) spectroscopy confirmed complete urethane bond formation, isocyanate group (NCO%) titration validated stoichiometric conversion. Gel permeation chromatography (GPC) revealed distinct weight distributions, which influence performance by affecting density, elasticity, depending on polyol structure. Thermal analysis showed that isosorbide-derived formulations exhibited up 25°C higher degradation onset temperature 10°C increase glass transition (Tg) adhesives. Meanwhile, containing diglycerol glycerol demonstrated 39% shear (32.5 MPa) 77% improved impact resistance (36.8 relative reference system, attributed optimized segmental mobility crosslinking effects. work establishes strategic framework designing while acknowledging limitations such potential variability raw material sources suggesting future research into long-term environmental performance, not only surpasses conventional systems but also aligns principles green chemistry innovation. These findings offer pathway next-generation structural applications.

Language: Английский

Citations

0