Scalable Production of Biodegradable, Recyclable, Sustainable Cellulose–Mineral Foams via Coordination Interaction Assisted Ambient Drying

ACS Nano, Journal Year: 2022, Volume and Issue: 16(10), P. 16414 - 16425

Published: Oct. 14, 2022

Heavy reliance on petrochemical-based plastic foams in both industry and society has led to severe pollution (the so-called "white pollution"). In this work, we develop a biodegradable, recyclable, sustainable cellulose/bentonite (Cel/BT) foam material directly from resource-abundant natural materials (i.e., lignocellulosic biomass minerals) via ambient drying. The strong resistance the capillary force-driven structural collapse of preformed three-dimensional (3D) network during drying process can be ascribed purpose-designed cellulose–bentonite coordination interaction, which provides practical way for locally scalable production with designed shapes without complex processing intensive energy consumption. Benefiting Cel/BT demonstrates high mechanical strength outstanding thermal stability, outperforming commercial polystyrene foam. Furthermore, presents environmental impacts much lower than those as it 100% recycled closed-loop recycling easily biodegraded environment (natural cellulose goes back carbon cycle, bentonite minerals return geological cycle). This study an energy-efficient approach local all-natural packaging, buildings, beyond, presenting great potential response pollution" resource shortage.

Language: Английский

---

Complete valorization of bamboo biomass into multifunctional nanomaterials by reactive deep eutectic solvent pretreatment: Towards a waste-free biorefinery

Chemical Engineering Journal, Journal Year: 2023, Volume and Issue: 462, P. 142213 - 142213

Published: March 2, 2023

Language: Английский

---

Superelastic and Ultralight Aerogel Assembled from Hemp Microfibers

Advanced Functional Materials, Journal Year: 2023, Volume and Issue: 33(22)

Published: March 14, 2023

Abstract Aerogels with both high elastic strain and fast shape recovery after compression have broad application potentials as thermal regulation, absorbents, electrical devices. However, creating such aerogels from cellulosic materials requires complicated preparation processes. Herein, a simple strategy for scalable production of hemp microfibers using top‐down method is reported, which can further be assembled into interconnected porous structures via ice‐templating technique. With density low 2.1 mg cm −3 , these demonstrate isotropic superelasticity, exhibited by their restoration over 80% compressive strain. Due to the porosity (99.87%) structural tortuosity, show conductivity 0.0215 ± 0.0002 W m −1 K suggesting potential in insulation application. Certain hydrophobic modification silane derivative endows reduced water affinity. Overall, proposed prepare bio‐based technology, well aerogels, provides new insights design fabrication multifunctional value‐added applications.

Language: Английский

---

Fire‐Safe Aerogels and Foams for Thermal Insulation: From Materials to Properties

Advanced Materials, Journal Year: 2024, Volume and Issue: unknown

Published: Nov. 19, 2024

The ambition of human beings to create a comfortable environment for work and life in sustainable way has triggered great need advanced thermal insulation materials past decades. Aerogels foams present prospects as insulators owing their low density, good insulation, mechanical robustness, even high fire resistance. These merits make them suitable many real-world applications, such energy-saving building materials, thermally protective aircrafts battery, warming fabrics. Despite advances, date there remains lack comprehensive yet critical review on the materials. Herein, recent progresses fire-safe thermal-insulating aerogels are summarized, pros/cons three major categories aerogels/foams (inorganic, organic hybrids) discussed. Finally, key challenges associated with existing discussed some future opportunities proposed. This is expected expedite development insulating help sustainable, safe, energy-efficient society.

Language: Английский

---

Periodate oxidation-mediated nanocelluloses: Preparation, functionalization, structural design, and applications

Carbohydrate Polymers, Journal Year: 2024, Volume and Issue: 341, P. 122305 - 122305

Published: May 29, 2024

In recent years, the remarkable progress in nanotechnology has ignited considerable interest investigating nanocelluloses, an environmentally friendly and sustainable nanomaterial derived from cellulosic feedstocks. Current research primarily focuses on preparation applications of nanocelluloses. However, to enhance efficiency nanofibrillation, reduce energy consumption, expand nanocellulose applications, chemical pre-treatments cellulose fibers have attracted substantial extensive exploration. Various pre-treatment methods yield nanocelluloses with diverse functional groups. Among these methods, periodate oxidation garnered significant attention recently, due formation dialdehyde nanocellulose, which exhibits great promise for further modification various This review seeks provide a comprehensive in-depth examination oxidation-mediated (PONCs), including their preparation, functionalization, hierarchical structural design, applications. We believe that PONCs stand as highly promising candidates development novel nano-cellulosic materials.

Language: Английский

---

A tough, healable, and recyclable conductive polyurethane/carbon nanotube composite

Journal of Colloid and Interface Science, Journal Year: 2022, Volume and Issue: 631, P. 239 - 248

Published: Nov. 14, 2022

Language: Английский

---

Air drying scalable production of hydrophobic, mechanically stable, and thermally insulating lignocellulosic foam

Chemical Engineering Journal, Journal Year: 2022, Volume and Issue: 450, P. 138300 - 138300

Published: July 25, 2022

Language: Английский

---

Production of functionalized nanocelluloses from different sources using deep eutectic solvents and their applications

Industrial Crops and Products, Journal Year: 2023, Volume and Issue: 199, P. 116583 - 116583

Published: April 28, 2023

Nanocelluloses have gained increasing attention over the years due to their attractive intrinsic properties, such as high strength and stiffness, biocompatibility, good film-forming ability, easy surface functionalization, tunable optical etc. With these unique features, nanocelluloses potential be applied in a wide range of applications. However, economic environmental problems associated conventional methods producing make it difficult produce them on large scale. Therefore, scientific community has been studying new alternatives. One alternative that recently emerged is use deep eutectic solvents (DESs) for production nanocelluloses. The biodegradable biocompatible character DESs combined with low toxicity, preparation, tunability recyclability turn promising alternatives nanocellulose isolation. In this sense, article provides comprehensive overview (ligno)cellulose nanofibrils ((L)CNFs) nanocrystals ((L)CNCs) from woody resources non-woody/agricultural residues using DESs. Additionally, applications produced DES-(L)CNFs DES-(L)CNCs are also discussed. From review, was possible conclude by different DES components, types chemical functionalization (L)CNFs obtained, which confer final material distinct properties. films showed very mechanical On other hand, can higher yields showing better thermal stability compared CNC production. Despite results, an in-depth analysis still lacking. Notwithstanding, favorable reuse results indicate they candidates (and nanocellulose-based films)

Language: Английский

---

Mechanically Robust Nanoporous Polyimide/Silica Aerogels for Thermal Superinsulation of Aircraft

ACS Applied Nano Materials, Journal Year: 2023, Volume and Issue: 6(9), P. 7269 - 7279

Published: May 2, 2023

Polyimide aerogels (PIAs) are thermally insulating materials that possess various advantages, such as exceptionally high temperature resistance and low thermal conductivity, which make them great potential candidate to be applied in the area of protection. However, under harsh mechanical stresses, macro- microscopic structural stability PIAs may compromised due shrinkage/collapse, leading performance degradation. Herein, we propose a homogeneous organic/inorganic hybrid formation strategy for constructing nanoporous polyimide/silica (PIAs-A) with exceptional strength ultralow conductivity. The results obtained indicate PIAs-A have an optimal three-dimensional network structure pore size distribution mainly within range 10–20 nm. Monitoring evolution material's cold surface showed it remained at 37.5 °C even when material was placed against hot 150 °C. residual strengths superior level (with degradation being less than 9%) after exposure high-temperature atmospheres. Furthermore, compressive stress values 3% strain exceeded previously reported by 625 733% −50 100 °C, respectively. Meanwhile, our displayed flame exposed heat source approximately 1200 possessed favorable hydrophobic properties, maintained dimensional up 504 robust insulation properties promising substitute superinsulation aircraft.

Language: Английский

---

Multiscale Design for Robust, Thermal Insulating, and Flame Self‐Extinguishing Cellulose Foam

Small, Journal Year: 2023, Volume and Issue: 20(12)

Published: Nov. 8, 2023

Abstract Cellulose foams are in high demand an era of prioritizing environmental consciousness. Yet, transferring the exceptional mechanical properties cellulose fibers into a network remains significant challenge. To address this challenge, innovative multiscale design is developed for producing foam with integrity. Specifically, relies on combination physical cross–linking microfibrillated (MFC) networks by nanofibril (CNF) and aluminum ion (Al 3+ ), as well self‐densification induced ice‐crystal templating, cross–linking, solvent exchange, evaporation. The resultant demonstrates low density 40.7 mg cm –3 , porosity 97.3%, robust compressive modulus 1211.5 ± 60.6 kPa energy absorption 77.8 1.9 kJ m −3 . introduction CNF Al also confers excellent wet stability flame self‐extinguish ability. Furthermore, can be easily biodegraded natural environments re‐entering ecosystem's carbon cycle. This strategy yields outstanding durability, opening new possibilities advancement high‐performance materials.

Language: Английский

---