Effects of hydrothermal pretreatment on nano-mechanical property of switchgrass cell wall and on energy consumption of isolated lignin-coated cellulose nanofibrils by mechanical grinding

Xu, Kaimeng; Shi, Zhengjun; Lyu, Jianhua; Zhang, Qijun; Zhong, Tuhua; Du, Guanben; Wang, Siqun

doi:10.1016/j.indcrop.2020.112317

Cited by 33 publications

(8 citation statements)

References 47 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Figure b shows TEM images of the LCNF with high lignin content (labeled as H-LCNF). Remarkably, a few lignin nanoparticles with diameters of about 30 nm were found to have become coated on the surface of CNFs, a finding that agrees with our previous research . It was demonstrated that some lignin–carbohydrate complexes were able to migrate from cell walls and load onto the surface of the switchgrass after hydrothermal pretreatment .…”

Section: Resultssupporting

confidence: 91%

“…As depicted in Figure a, a laser-induced carbon pattern was fabricated on a LCNF film using a simple method under ambient conditions. In this study, LCNF composite samples were prepared by hydrothermal pretreatment and mechanical fibrillation from switchgrass as reported in our previous researches. , After the LCNF slurry was cast onto the paper substrate, the film surface was irradiated by a pulse FS laser and was converted into NDs (see the “Materials and Methods” section). As a natural material, switchgrass is a composite primarily composed of cellulose, hemicellulose, and lignin.…”

Section: Resultsmentioning

confidence: 99%

“…Remarkably, a few lignin nanoparticles with diameters of about 30 nm were found to have become coated on the surface of CNFs, a finding that agrees with our previous research. 40 It was demonstrated that some lignin−carbohydrate complexes were able to migrate from cell walls and load onto the surface of the switchgrass after hydrothermal pretreatment. 41 After drying to form the H-LCNF film, the cellulose nanofibrils integrated and formed a compact lamellar surface, while the lignin nanoparticles were scattered in the film.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

“…The production of LCNF composites was conducted by hydrothermal pretreatment and mechanical fibrillation, as described in our previous publication. , In brief, after soaking for 24 h, the switchgrass slurry (1 wt %) was put in a high-pressure reactor under different temperature and time conditions for hydrothermal pretreatment. After that, the pretreated slurries were fibrillated with a MKCA6–5JR Super MassColloider (Disk model: MKGA46, Masuko Sangyo Co., Ltd., Japan) at a speed of 15 000 rpm for 18 grinding passes.…”

Section: Methodsmentioning

confidence: 99%

See 3 more Smart Citations

Fabricating Nanodiamonds from Biomass by Direct Laser Writing under Ambient Conditions

Yan

Zhang

Deng

et al. 2021

ACS Sustainable Chem. Eng.

Self Cite

View full text Add to dashboard Cite

Commercial nanodiamonds (NDs) are usually produced by detonation and chemical vapor deposition. While these methods normally require either the application of extreme temperatures/pressures or expensive and hazardous gaseous/ chemical precursors, in this study, NDs were produced on paper made from nanolignin/cellulose nanofibrils (LCNF) composite film by means of direct laser writing at ambient temperature and air pressure. The generation of NDs was found to depend largely on high laser power. Graphene nanoribbons and carbon nanoonions were obtained at lower laser power as acceptable products. As cellulose nanofibrils were unsuccessfully lased in this study, the effects of diverse components of LCNFs were investigated. Results showed that a suitable cellulose content in LCNFs can accelerate laser carbonization, while an excessive oxygen content component will lead to the combustion of LCNFs in air. Moreover, it was found that a higher lignin content was essential for the formation of NDs. Individual nanolignin particles were able to be converted into NDs. However, this lasing process needed a higher-power laser than that did that from LCNF. Considering the abundance and renewability of LCNFs, the direct laser writing technique provides a simple, inexpensive, and environmentally friendly method for the synthesis of NDs and the fabrication of paper-based carbon patterns from biomass, which is both inexpensive and readily available.

show abstract

Section: Resultssupporting

confidence: 91%

Section: Resultsmentioning

confidence: 99%

Section: ■ Results and Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

See 2 more Smart Citations

Fabricating Nanodiamonds from Biomass by Direct Laser Writing under Ambient Conditions

Yan

Zhang

Deng

et al. 2021

ACS Sustainable Chem. Eng.

Self Cite

View full text Add to dashboard Cite

show abstract

“…They can be less expensive, as the capital investment for TMP equipment is not required and applicable on a smaller scale. A previous study carried out power measurement studies on LCNF production from untreated switchgrass and liquid hot water pretreated switchgrass using the same fibrillation equipment (Xu et al 2020). They found that untreated switchgrass consumed ~20 KWh/kg electricity at 18 passes.…”

Section: Resultsmentioning

confidence: 99%

Fabrication of lignocellulosic biomass paper containing nanofibrillated biomass

Bhagia

Dunlap

Khuraishi

et al. 2020

BioRes

View full text Add to dashboard Cite

Fibrillated cellulose has been frequently used for making nanopapers and thin films. However, limited work has been carried out in the construction of such materials using native lignocellulosic biomass. Making papers from fibrillated biomass allows complete utilization of whole plant material and may reduce chemical and energy consumption. Ultra-friction grinding was used to directly fibrillate knife-milled poplar into micro- to nano-sized biomass fibers. Papers were made using the fibrillated biomass containing nanofibrillated biomass and their mechanical properties were tested. Biomass papers made via press-drying had higher tensile strength than papers made by air-drying. A higher press-drying temperature of 180 °C produced stronger papers than at 150 °C. Guar gum substantially increased the strength of the press-dried papers in comparison to cationic starch. Press-drying increased the thermogravimetric peak decomposition temperature by 13 °C in comparison to air-drying.

show abstract

Optimizing cellulose microfibrillation with NaOH pretreatments for unbleached Eucalyptus pulp

et al. 2021

View full text Add to dashboard Cite

This study aimed to assess the effect of drying unbleached Eucalyptus cellulose fibers after the application of pretreatments in order to optimize the microfibrillation process, as well as to evaluate the efficiency of NaOH pretreatments in reducing energy consumption for production of microfibrillated cellulose (MFC). Pretreatments with 0 wt% (untreated), 5 wt% and 10 wt% NaOH were evaluated. The length and width of the fibers pretreated with NaOH decreased significantly, mainly with hasher pretreatments.The removal of hemicellulose from the fiber cell wall was an important factor concerning the degree of fibrillation of the fibers. Pretreating fibers with 5 wt% NaOH for 2 h increased the water retention value (WRV), in addition to presenting the lowest energy consumption for fibrillation, promoting energy savings of up to 48%. Pulps that were not dried after the NaOH pretreatments incurred in easier microfibrillation and lower energy consumption when comparing to the dried pulp, which shows the negative impact of drying on the fibers to obtain the MFC.

show abstract

Effects of hydrothermal pretreatment on nano-mechanical property of switchgrass cell wall and on energy consumption of isolated lignin-coated cellulose nanofibrils by mechanical grinding

Cited by 33 publications

References 47 publications

Fabricating Nanodiamonds from Biomass by Direct Laser Writing under Ambient Conditions

Fabricating Nanodiamonds from Biomass by Direct Laser Writing under Ambient Conditions

Fabrication of lignocellulosic biomass paper containing nanofibrillated biomass

Optimizing cellulose microfibrillation with NaOH pretreatments for unbleached Eucalyptus pulp

Contact Info

Product

Resources

About