Matches in SemOpenAlex for { <https://semopenalex.org/work/W3138753560> ?p ?o ?g. }
Showing items 1 to 73 of
73
with 100 items per page.
- W3138753560 abstract "All-cellulose composites (ACCs) is a new generation of biocomposites with both the matrix and reinforcing fibers being based on cellulose. This thesis explores various designs of ACCs using either macro- or nano-scale cellulose fibers as raw materials and ionic liquids (ILs) as cellulose solvents. Prior to ACCs fabrication, the swelling and dissolution kinetics of different cellulose fibers (natural fiber flax, viscose-type Cordenka and two Ioncell fibers with one containing lignin and hemicelluloses) in solvent power tuned ILs (1-ethyl-3-methylimidazolium acetate, [EMIM][OAc] and N-methyl-1,5-diazabicyclo[4.3.0]non-5-enium dimethyl phosphate, [mDBN][DMP]) was studied. High performance unidirectional flax-based ACCs, isotropic filter paper-based ACCs and nanopaper were then produced involving controlled dissolution and/or swelling of cellulose fibers. The fundamental investigation on fibers swelling and dissolution kinetics revealed that the rate of fiber dissolution in [EMIM][OAc] depended on fiber accessibility and solvent viscosity. The fastest dissolution (in [EMIM][OAc] and [EMIM][OAc]-5% water) or swelling (in [EMIM][OAc]-15% water) was recorded for Ioncell fibers and the slowest for Cordenka. An anomalous two-step dissolution-swelling behavior of flax was observed in [mDBN][DMP] and [mDBN][DMP]-water. ACCs from either unidirectional flax or isotropic filter paper were produced via selective dissolution strategy. For flax-based ACCs, it was shown that the mechanical properties were controlled by the sufficient amount of matrix and the non-dissolution of the inner, mechanically strong cell walls in the fiber. The interface between the matrix and the fibers was further artfully re-modelled by utilizing two-step dissolution-swelling phenomenon in [mDBN][DMP], resulting in increased tensile strength in both transverse direction and fiber direction. For isotropic paper-based ACCs, a digital image correlation technique was explored for accuracy enhanced analysis of mechanical properties. A 30-60 min impregnation allowed increasing tensile strength, Young's modulus and toughness of a filter paper in almost 10 times, 5 times and 25 times, respectively.Isotropic ACC constructed from highly disordered and entangled cellulose nanofibrils (CNFs) through their self-binding exhibited an exceptional ductility (up to 35%) while combining high strength (up to 260 MPa) and toughness (up to 51 MJ/m3). This was realized by swelling of hemicelluloses in-between the nanofibrils in [EMIM][OAc]–water below the dissolution limit of cellulose and hemicellulose, thus allowing delamination of thick CNF bundles into thinner ones without influencing the length. The results obtained demonstrate that a fundamental understanding of cellulose swelling and dissolution promotes various possibilities to design ACCs with engineered performance. The findings bring new perspectives to the design of macroscale and nanoscale cellulosic materials." @default.
- W3138753560 created "2021-03-29" @default.
- W3138753560 creator A5021979312 @default.
- W3138753560 date "2021-01-01" @default.
- W3138753560 modified "2023-09-27" @default.
- W3138753560 title "Designing High Performance All-Cellulose Composites by Dissolution/Swelling of Macro- and Nano-scale Cellulose Fibers" @default.
- W3138753560 hasPublicationYear "2021" @default.
- W3138753560 type Work @default.
- W3138753560 sameAs 3138753560 @default.
- W3138753560 citedByCount "0" @default.
- W3138753560 crossrefType "journal-article" @default.
- W3138753560 hasAuthorship W3138753560A5021979312 @default.
- W3138753560 hasConcept C127413603 @default.
- W3138753560 hasConcept C154881586 @default.
- W3138753560 hasConcept C159985019 @default.
- W3138753560 hasConcept C161790260 @default.
- W3138753560 hasConcept C178790620 @default.
- W3138753560 hasConcept C185592680 @default.
- W3138753560 hasConcept C192562407 @default.
- W3138753560 hasConcept C2187297 @default.
- W3138753560 hasConcept C2776321517 @default.
- W3138753560 hasConcept C2778540859 @default.
- W3138753560 hasConcept C2779251873 @default.
- W3138753560 hasConcept C2780471494 @default.
- W3138753560 hasConcept C28344629 @default.
- W3138753560 hasConcept C42360764 @default.
- W3138753560 hasConcept C519885992 @default.
- W3138753560 hasConcept C54965259 @default.
- W3138753560 hasConcept C88380143 @default.
- W3138753560 hasConceptScore W3138753560C127413603 @default.
- W3138753560 hasConceptScore W3138753560C154881586 @default.
- W3138753560 hasConceptScore W3138753560C159985019 @default.
- W3138753560 hasConceptScore W3138753560C161790260 @default.
- W3138753560 hasConceptScore W3138753560C178790620 @default.
- W3138753560 hasConceptScore W3138753560C185592680 @default.
- W3138753560 hasConceptScore W3138753560C192562407 @default.
- W3138753560 hasConceptScore W3138753560C2187297 @default.
- W3138753560 hasConceptScore W3138753560C2776321517 @default.
- W3138753560 hasConceptScore W3138753560C2778540859 @default.
- W3138753560 hasConceptScore W3138753560C2779251873 @default.
- W3138753560 hasConceptScore W3138753560C2780471494 @default.
- W3138753560 hasConceptScore W3138753560C28344629 @default.
- W3138753560 hasConceptScore W3138753560C42360764 @default.
- W3138753560 hasConceptScore W3138753560C519885992 @default.
- W3138753560 hasConceptScore W3138753560C54965259 @default.
- W3138753560 hasConceptScore W3138753560C88380143 @default.
- W3138753560 hasLocation W31387535601 @default.
- W3138753560 hasOpenAccess W3138753560 @default.
- W3138753560 hasPrimaryLocation W31387535601 @default.
- W3138753560 hasRelatedWork W2020784242 @default.
- W3138753560 hasRelatedWork W2060831167 @default.
- W3138753560 hasRelatedWork W2070066314 @default.
- W3138753560 hasRelatedWork W2105092313 @default.
- W3138753560 hasRelatedWork W2164449874 @default.
- W3138753560 hasRelatedWork W2367974574 @default.
- W3138753560 hasRelatedWork W2381128147 @default.
- W3138753560 hasRelatedWork W2381627790 @default.
- W3138753560 hasRelatedWork W2499990021 @default.
- W3138753560 hasRelatedWork W2738958466 @default.
- W3138753560 hasRelatedWork W2743627298 @default.
- W3138753560 hasRelatedWork W2750675828 @default.
- W3138753560 hasRelatedWork W2773130160 @default.
- W3138753560 hasRelatedWork W2786144362 @default.
- W3138753560 hasRelatedWork W2975895215 @default.
- W3138753560 hasRelatedWork W3019943070 @default.
- W3138753560 hasRelatedWork W3045611282 @default.
- W3138753560 hasRelatedWork W3126784449 @default.
- W3138753560 hasRelatedWork W601362625 @default.
- W3138753560 hasRelatedWork W2853341987 @default.
- W3138753560 isParatext "false" @default.
- W3138753560 isRetracted "false" @default.
- W3138753560 magId "3138753560" @default.
- W3138753560 workType "article" @default.