Polymers and Materials From Lignin: Thermosets and Thermoplastics DOI
Martin Lawoko, Fika Andriani, Iuliana Ribca

et al.

Elsevier eBooks, Journal Year: 2024, Volume and Issue: unknown

Published: Jan. 1, 2024

Language: Английский

Eugenol-Based Siloxane-Containing Recyclable Epoxy Resins with Tunable Dynamic Properties, Reprocessability, and Degradability DOI

Yinqiao Liu,

Wenshuo Shi,

Ji Han

et al.

ACS Sustainable Chemistry & Engineering, Journal Year: 2024, Volume and Issue: 12(46), P. 16976 - 16985

Published: Nov. 8, 2024

Developing recyclable and biobased thermosetting polymers is of great significance for environmental protection resource recycling. In this work, three liquid eugenol-based siloxane-containing epoxides (ESI1–3) with different rigid side groups functionalities were synthesized cured by anhydride or amine hardeners. The epoxy resins the hardener (ESI-M) show quite dynamic properties, reprocessability, degradability compared to those (ESI-H). Bifunctional (ESI1 ESI2) anhydrides exhibit significantly faster stress relaxation at lower temperatures amines. All can be reprocessed hot pressing due their structures. Both ESI1-M ESI2-M almost fully restore mechanical properties after reprocessing. However, ESI1-H ESI2-H poor reprocessability even when pressed high temperature. ESI degrade rapidly in a tetrabutylammonium fluoride trihydrate/tetrahydrofuran solution, but they distinctly degradation behaviors acidic solutions. Notably, degraded ESI-H HCl solution recycled prepare new resins, whose tensile strengths are comparable original resins. Finally, carbon fiber reinforced composites electromagnetic wave absorbing coatings fabricated based on resin. Carbon fibers magnetite powders quickly nondestructively through degrading

Language: Английский

Citations

5
Formation of Homogeneous Lignin Nanoparticles from Industrial Kraft Lignin via Fractionation Combined with Antisolvent Precipitation DOI
Zhongshan Wang, Changgeng Li, Xiaodi Liu

et al.

Biomacromolecules, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 14, 2025

Processing lignin into nanoparticles (LNPs) offers a promising utilization strategy; however, its structural and molecular weight heterogeneity poses challenges in the formation of uniform LNPs. In this study, industrial kraft was fractionated stepwise (Mw) from low to high which LNPs were fabricated via antisolvent precipitation. The results showed that with Mw benefits smaller-sized Particularly, fraction 2016 g·mol–1 fails form main mechanism is higher content hydrophilic groups (mainly phenolic hydroxyl groups) on lower hinders This hypothesis supported by successful homogeneous after acetylation. Fractionation effectively reduces promotes LNPs, would favor chemical reactivity properties, enhancing lignin.

Language: Английский

Citations

0
Unlocking the Potential of Lignin-Based Polyhydroxyurethanes: Insights into Kinetics, Physical Behavior, and Recyclability DOI

Nathan Wybo,

Antoine Duval, Luc Avérous

et al.

Published: Jan. 1, 2025

Language: Английский

Citations

0
Unlocking the Potential of Lignin-based Polyhydroxyurethanes: Insights into Kinetics, Physical Behavior, and Recyclability DOI Creative Commons

Nathan Wybo,

Antoine Duval, Luc Avérous

et al.

Materials Today Sustainability, Journal Year: 2025, Volume and Issue: unknown, P. 101117 - 101117

Published: April 1, 2025

Language: Английский

Citations

0
Reaction pathways of lignin phenolation in alkaline medium and the compatibility for integrated phenolation-kraft pulping process DOI Creative Commons
Zhendong Chen, Jiangxin Li,

Songnan Hu

et al.

Industrial Crops and Products, Journal Year: 2025, Volume and Issue: 230, P. 121092 - 121092

Published: April 28, 2025

Language: Английский

Citations

0
Constructing multiple bonding mechanisms with a novel lignin-activated modified polymer core for the fabrication of strong, water-resistant, and mildew-resistant adhesives DOI
Hanzhang Wang,

Junyi Zhou,

Lanfang Sun

et al.

Industrial Crops and Products, Journal Year: 2024, Volume and Issue: 222, P. 119536 - 119536

Published: Aug. 30, 2024

Language: Английский

Citations

2
Bio-based Epoxy Composites Demonstrating High Temperature Breakdown Strength and Thermal Conductivity for High Voltage Insulation DOI
Kerong Yang, Jinyue Dai,

Shuaipeng Wang

et al.

Chinese Journal of Polymer Science, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 25, 2024

Language: Английский

Citations

1
An oxidative depolymerized lignin treated by potassium ferrate and its use in preparation of epoxy resin DOI Open Access
Dayu Shi, Fangeng Chen, Xuesong Zhou

et al.

Journal of Applied Polymer Science, Journal Year: 2024, Volume and Issue: unknown

Published: Oct. 22, 2024

Abstract Lignin, as an industrial by‐product, can be used a phenolic substancen. In this study, enzymatic hydrolysis lignin (L) was treated with potassium ferrate and phenol respectively to obtain oxidized (OL) phenolated (PL). Their hydroxyl content (PhOH) increased by 29.1% 40.5%, respectively. Then four kinds of epoxy resins were prepared, namely lignin‐free resin (LFER), L (LER), PL (PLER), OL (OLER). Gel permeation chromatography (GPC) Fourier transform infrared analyses indicated that oxidation could decline the molecular weight (Mw) increase PhOH L. Mechanical properties test dynamic mechanical analysis (DMA) results show cured OLER (OLEN) has higher crosslinking density better (shear strength 14%, tensile 15%) than LER (LEN). Thermogravimetric OLEN thermal stability LFER (LFEN) LEN. addition, scanning electron microscopy images showed modified had compatibility. This study presents novel approach for oxidation.

Language: Английский

Citations

0
Lignin‐Modified Epoxy Resin With Good Mechanical and Shape Memory Performance Fabricated by Synergistic Dispersion and Crosslinking With Polyetheramine DOI Open Access

Hongjun Xu,

Jianqiang Pan,

Changbiao Chen

et al.

Journal of Applied Polymer Science, Journal Year: 2024, Volume and Issue: 142(10)

Published: Dec. 13, 2024

ABSTRACT To improve the reactivity and compatibility of lignin, it was first functionalized via method epoxidation. The epoxidized lignin (LEP) modified epoxy resin with good mechanical shape memory performance fabricated ingeniously by introducing LEP into homogeneously aid synergistic dispersion crosslinking polyetheramine without using organic solvents. effect addition on curing reaction, thermal, mechanical, were intensively evaluated. epoxy‐diamine reaction promoted incorporation, thermal stability improved. tensile strength modulus LEP‐modified increased 14.3% 32.5%, respectively. Such reinforcing contributed to rigid chains which chemically crosslinked network uniformly. Also, component in cured inhibited movement chain segments, could enhance slow down rapid recovery rate some extent.

Language: Английский

Citations

0
Polymers and Materials From Lignin: Thermosets and Thermoplastics DOI
Martin Lawoko, Fika Andriani, Iuliana Ribca

et al.

Elsevier eBooks, Journal Year: 2024, Volume and Issue: unknown

Published: Jan. 1, 2024

Language: Английский

Citations

0