“…[31,47,88] Due to their good biocompatibility, biodegradation, easy modification, and unique dielectric properties, self-assembled cellulose-based films can be used as flexible substrates, dielectric layers, separators, and hemostatic bio-membranes for flexible intelligent electronics and biological wearable devices. [108][109][110][111][112][113]…”
Structural design and self‐assembly at the molecular level provide feasible strategies for constructing materials with novel and unique properties. Cellulose is one of the most abundant bioresources and is renewable, biodegradable, biocompatible, and environmentally friendly. The formation of hydrogen‐bonding networks between the cellulose molecular chains on the one hand gives cellulose a rigid crystalline region and high mechanical strength and on the other hand it causes inconvenience to material design based on the molecular scale. The emergence of eco‐friendly solvents such as ionic liquids and alkali/urea solutions breaks the hydrogen bonds and allows the design of various cellulose‐based functional materials, such as membranes, gels, fibers, and nano/microspheres via structural optimization and molecular self‐assembly. Such functional materials have promising applications in flexible electronic devices, such as electrochemical energy storage devices, sensors, biomimetic electronic skins, and optoelectronic devices. In this review, green solvents for cellulose, the dissolution–recombination process, molecular self‐assembly strategies, advanced applications, and future development prospects for high‐performance cellulose‐based functional materials with unique structures are presented.
“…[31,47,88] Due to their good biocompatibility, biodegradation, easy modification, and unique dielectric properties, self-assembled cellulose-based films can be used as flexible substrates, dielectric layers, separators, and hemostatic bio-membranes for flexible intelligent electronics and biological wearable devices. [108][109][110][111][112][113]…”
Structural design and self‐assembly at the molecular level provide feasible strategies for constructing materials with novel and unique properties. Cellulose is one of the most abundant bioresources and is renewable, biodegradable, biocompatible, and environmentally friendly. The formation of hydrogen‐bonding networks between the cellulose molecular chains on the one hand gives cellulose a rigid crystalline region and high mechanical strength and on the other hand it causes inconvenience to material design based on the molecular scale. The emergence of eco‐friendly solvents such as ionic liquids and alkali/urea solutions breaks the hydrogen bonds and allows the design of various cellulose‐based functional materials, such as membranes, gels, fibers, and nano/microspheres via structural optimization and molecular self‐assembly. Such functional materials have promising applications in flexible electronic devices, such as electrochemical energy storage devices, sensors, biomimetic electronic skins, and optoelectronic devices. In this review, green solvents for cellulose, the dissolution–recombination process, molecular self‐assembly strategies, advanced applications, and future development prospects for high‐performance cellulose‐based functional materials with unique structures are presented.
“…[80] with permission from The Royal Society of Chemistry and Ref. [59,79,81] with permissions from Elsevier).…”
Section: Extraction Of Natural Polymersmentioning
confidence: 99%
“… Figure 1. Films and hydrogels derived from different biomass wastes: (a) films from wastepaper; (b) cellulose nanofibril (CNF) hydrogel from waste sackcloth; (c) film from durian rind; and (d) film from Eucalyptus globulus wood chips [ 59 , 79–81 ] (Reproduced by permissions from [ 80 ], copyright [2014, The Royal Society of Chemistry], from [ 59 ], copyright [2020, Elsevier], from [ 79 ], copyright [2015, Elsevier] and from [ 81 ], copyright [2019, Elsevier]) …”
Section: Extraction Of Natural Polymersmentioning
confidence: 99%
“…*' Calculated by the weight of extracted polymer/the weight of polymer in raw material '**' Calculated by dry weight of extracted polymer/dry weight of raw material 'n.d.' Not determined Films and hydrogels derived from different biomass wastes: (a) films from wastepaper; (b) cellulose nanofibril (CNF) hydrogel from waste sackcloth; (c) film from durian rind; and (d) film from Eucalyptus globulus wood chips[59,[79][80][81] …”
The amount of biomass wastes is rapidly increasing, which leads to numerous disposal problems and governance issues. Thus, the recycling and reuse of biomass wastes into value-added applications have attracted more and more attention. This paper reviews the research on biomass waste utilization and biomass wastes derived functional materials in last five years. The recent research interests mainly focus on the following three aspects: (1) extraction of natural polymers from biomass wastes, (2) reuse of biomass wastes, and (3) preparation of carbon-based materials as novel adsorbents, catalyst carriers, electrode materials, and functional composites. Various biomass wastes have been collected from agricultural and forestry wastes, animal wastes, industrial wastes and municipal solid wastes as raw materials with low cost; however, future studies are required to evaluate the quality and safety of biomass wastes derived products and develop highly feasible and cost-effective methods for the conversion of biomass wastes to enable the industrial scale production.
“… 33 Cellulose can also adsorb heavy metals, 34 adsorb organic pollutants, 35 perform antibacterial functions, 36 and act as drug carriers, 37 after grafting functional groups onto cellulose or performing other physical modifications. In recent years, the regenerated cellulose films have also received extensive attention in green packaging, 38 , 39 coating, 40 screen display devices, 41 optoelectronic materials, 42 and electronic flexible screens. 43 Sixta 44 presented a novel regenerated cellulose fiber process of the Lyocell type using [DBNH][OAc] as a solvent, and the resultant cellulose solution has a high dissolution power and low viscosity.…”
1-Ally-3-methylimidazolium
chloride ([Amim]Cl), dimethyl sulfoxide
(DMSO), and CaCl
2
were selected to construct dissolution
systems to produce value-added products from pretreatment of waste
corrugated cardboards (P-WCCs). The dissolution behaviors of P-WCCs
before and after ball milling were studied in different dissolution
systems. The regenerated cellulose films were quickly and efficiently
prepared via dissolving, regenerating, and pressurized drying. When
4 wt % waste corrugated cardboard was dissolved in [Amim]Cl for 4
h at 90 °C, the regenerated cellulose films featured tensile
strengths as high as 59.00 MPa. Adding 40% DMSO and 2 wt % CaCl
2
increased the tensile strength of the film to a maximum value
of 85.86 MPa. This demonstrates that DMSO improves the ability of
WCC to dissolve in ionic liquids; Ca
2+
improves the tensile
strength and thermal stability of the regenerated cellulose film but
reduces its transparency. This work provides a new, simple, and highly
efficient way to use WCCs for packaging and wrapping.
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