Effect of Different Delignification Degrees of Korean White Pine Wood on Fibrillation Efficiency and Tensile Properties of Nanopaper

박찬우,; 이서호,; 한송이,; 김보연,; 장재혁,; 김남훈,; Lee, Seung Hwan

doi:10.5658/wood.2015.43.1.17

Cited by 6 publications

(7 citation statements)

References 14 publications

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“…In the LCNF paper sheet, both the properties in hardwoods were higher than those in softwoods, which may have been mainly due to the lower defibrillation degree of the softwoods. Park et al (2015) also reported that the tensile strength and elastic modulus of the LCNF paper sheets increased with an increased defibrillation degree. The tensile properties of the paper sheets were higher in the HCNF and PCNF than the LCNF due to the absence of lignin, and the higher defibrillation degree.…”

Section: Filtration Timementioning

confidence: 95%

“…The diameter of LCNF generally ranges from the submicron scale up to 15 nm, which is larger than the average diameters of HCNF and PCNF (Jang et al 2013;Park et al 2015). This causes LCNF to have difficulty with defibrillation, along with the structural heterogeneity and complexity of the cell wall constituents of the lignocellulosic biomass, also called biomass recalcitrance.…”

Section: Introductionmentioning

confidence: 99%

“…Chang et al (2012) also reported that the partial removal of hemicellulose and lignin by a hotcompressed water treatment improves defibrillation efficiency by WDM. Park et al (2015) established that an increase in the delignification degree improves the defibrillation efficiency by WDM. Figure 3 shows the fiber diameter distribution of LCNF, HCNF, and PCNF; their average diameters are summarized in Table 2.…”

Section: Chemical Compositionmentioning

confidence: 99%

“…This may be due to the disruption and loosening of the cell wall structure by delignification (Iwamoto et al 2008;Park et al 2015). The HCNF has a core-shell structure in which the hemicellulose shell surrounds a cellulose core (Wan et al 2010;Galland et al 2015).…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Preparation and Characterization of Cellulose Nanofibrils with Varying Chemical Compositions

Park¹,

Han²,

Namgung³

et al. 2017

BioResources

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Cellulose nanofibrils (CNF) can be divided into lignocellulose nanofibrils (LCNF), holocellulose nanofibrils (HCNF), and pure cellulose nanofibrils (PCNF), dependent upon their chemical composition. The effect of the chemical composition on the defibrillation efficiency and the properties of the CNFs prepared by wet disk-milling was investigated using six different wood species. The defibrillation efficiency was improved when the lignin and hemicellulose was removed, and smaller fibers with diameters in the order of PCNF > HCNF > LCNF were produced. The average diameter of the hardwood LCNF was finer than that of the softwood LCNFs, but there was no noticeable difference in the diameters of the HCNF and the PCNF from the different wood species. The filtration time of CNF suspensions and the tensile properties of nanopaper sheets were longer and higher, respectively, in the order of HCNF > PCNF > LCNF from different wood species.

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Section: Filtration Timementioning

confidence: 95%

Section: Introductionmentioning

confidence: 99%

Section: Chemical Compositionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Preparation and Characterization of Cellulose Nanofibrils with Varying Chemical Compositions

Park¹,

Han²,

Namgung³

et al. 2017

BioResources

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“…Jang et al (2012) developed the technology to produce cellulose nanofibers from plantation resources by hammer mill type continuous grinding process. Cellulose nanofibers were also prepared for polyurethane nanocomposites (Jang et al, 2014) and nanopaper (Park et al, 2015) from Korean white pine through wet disk-milling.…”

Section: Introductionmentioning

confidence: 99%

Preprocessing Miscanthus sacchariflorus with Combination System of Cone Grinder and Air Classifier

Lee¹,

Eom²

2021

Journal of the Korean Wood Science and Technology

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Considerable differences exist in the characteristics of size reduction and classification because of biomass species. Miscanthus sacchariflorus (M. sacchariflorus) Goedae-Uksae 1 is not used efficiently because of the imperfections of the processing technology for this biomass. Therefore, for the best use of specific biomass, improvement in the feedstock preparation of the biomass for processing, such as pellet manufacturing, is necessary. In this study, a laboratory-scale cone grinder and air classifier were designed and combined to investigate the performance of the combination system for M. sacchariflorus. The average equivalent spherical diameter of particles showed a close relationship with air velocity for air classification. The air velocity range to classify proper particles for pelletization was determined to be 6.0-6.8 m/s. The mass ratios of the collected particles to feed mass for four lengths of chopped M. sacchariflorus were 45.1%:46.1%, 39.1%:46.6%, and 44.1%:52.8% at the first, second, and third steps in simulating the multistep combination system, respectively.

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Effect of lignocellulose nanofibril and polymeric methylene diphenyl diisocyanate addition on plasticized lignin/polycaprolactone composites

Park

Youe

Namgung

et al. 2018

BioRes

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Kraft lignin was plasticized with ε-caprolactone via twin-screw extrusion at 150 °C, and its glass transition temperature was decreased from 155 to 96 °C. The lignin or plasticized lignin (p-lignin)/polycaprolactone (PCL) composites with and without lignocellulose nanofibril (LCNF) or polymeric methylene diphenyl diisocyanate (pMDI) were prepared, and their properties were compared. The p-lignin was better dispersed in the PCL than neat lignin, and the p-lignin/PCL composites exhibited a homogenous fractured surface despite the addition of LCNF. An increase in the lignin or p-lignin content decreased the tensile strength and elastic moduli but increased the melt flow index (MFI). With the addition of pMDI and LCNF, the tensile properties and MFI improved and declined, respectively. The strength improvement by pMDI and LCNF was better in the p-lignin/PCL composite than in the lignin/PCL composite.

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Effect of Different Delignification Degrees of Korean White Pine Wood on Fibrillation Efficiency and Tensile Properties of Nanopaper

Cited by 6 publications

References 14 publications

Preparation and Characterization of Cellulose Nanofibrils with Varying Chemical Compositions

Preparation and Characterization of Cellulose Nanofibrils with Varying Chemical Compositions

Preprocessing Miscanthus sacchariflorus with Combination System of Cone Grinder and Air Classifier

Effect of lignocellulose nanofibril and polymeric methylene diphenyl diisocyanate addition on plasticized lignin/polycaprolactone composites

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