Orlando J. Rojas
University of British Columbia
AdsorptionNanoparticleComposite materialNanotechnologyOrganic chemistryAqueous solutionChemistryPolymer chemistryMaterials scienceNanocelluloseCelluloseLigninCellulose nanocrystalsChemical engineeringChromatographyFiberPolymerNanofiberNanocompositeQuartz crystal microbalance
628Publications
74H-index
17.9kCitations
Publications 650
Newest
#1Alvaro Gonzalez-Vogel (Aalto University)H-Index: 2
Last. Orlando J. Rojas (Aalto University)H-Index: 74
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Abstract null null A pulsed electrodialysis reversal (pEDR) process is proposed to desalinate spent water after particle removal, biological and chemical coagulation, which are commonly used as a sequence in Kraft pulp mills. pEDR affords closed-loop processing, reducing the need for freshwater intake while maintaining the quality of recirculating process streams. Compared with conventional electrodialysis, pEDR minimizes production losses (from 5 % to 0.6 %), extending the time for hydraulic re...
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#1Hossein Baniasadi (Aalto University)H-Index: 11
#2Zahraalsadat Madani (Aalto University)
Last. Jukka Seppälä (Aalto University)H-Index: 68
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Abstract null null We proposed a simple method to process hydrogels containing polyvinyl alcohol and cellulose nanofibrils (PVA/CNF) to prepare volumetric architectures by direct ink writing (DIW). The presence of CNF in the aqueous PVA suspensions conferred rheology profiles that were suitable for extrusion and solidification in pre-designed shapes. The viscoelastic behavior of the hybrid inks enabled precise control on processability and shape retention, for instance, as demonstrated in multil...
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#5Kaisa Kiri (VTT Technical Research Centre of Finland)H-Index: 1
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#1Eva Pasquier (UGA: University of Grenoble)
#2Marco Beaumont (BOKU: University of Natural Resources and Life Sciences, Vienna)H-Index: 8
Last. Julien Bras (UGA: University of Grenoble)H-Index: 62
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#1Mengqi Zhu (NEFU: Northeast Forestry University)
#2Siqi Huan (NEFU: Northeast Forestry University)H-Index: 19
Last. Long Bai (NEFU: Northeast Forestry University)H-Index: 21
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Abstract null null In this review, we discuss the application of cellulose nanoparticles as a sustainable and cost-effective source of green stabilizers for formulation of foodstuff. Fibrillar cellulose nanocrystal and nanofibril stabilize Pickering systems because of their ability to adsorb at the oil/water interfaces, forming protective layers. They also form associative structures in the continuous phase, increasing their viscoelastic properties and preventing flocculation. We describe the ch...
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#1Farid Elsehrawy (TKK: Helsinki University of Technology)
#2Konrad W. KlockarsH-Index: 3
Last. Janne HalmeH-Index: 29
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Colored solar cells suffer from lower efficiency due to reflection and absorption losses by coatings. By studying different types of coatings on solar cells, the spectrum parameters impacting the solar cell efficiency were identified. A collection of color coatings was fabricated and characterized using spectrophotometry and colorimetric photography. The coatings include commercial absorption filters, commercial distributed bragg reflectors, lab-made interference coatings, and cellulose nanocrys...
#1Erlantz Lizundia (UPV/EHU: University of the Basque Country)H-Index: 23
#2Mika Henrikki Sipponen (Stockholm University)H-Index: 20
Last. Debora Puglia (University of Perugia)H-Index: 55
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Significant progress in lignins valorization and development of high-performance sustainable materials have been achieved in recent years. Reports related to lignin utilization indicate excellent prospects considering green chemistry, chemical engineering, energy, materials and polymer science, physical chemistry, biochemistry, among others. To fully realize such potential, one of the most promising routes involves lignin uses in nanocomposites and nanohybrid assemblies, where synergistic intera...
1 CitationsSource
#1Tetyana V. Koso (UH: University of Helsinki)H-Index: 5
#2Marco Beaumont (BOKU: University of Natural Resources and Life Sciences, Vienna)H-Index: 8
Last. Alistair W. T. King (UH: University of Helsinki)H-Index: 23
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Gas-phase acylation of cellulose is an attractive method for modifying the surface properties of cellulosics. However, little is known concerning the regioselectivity of the chemistry, in terms of which cellulose positions are preferentially acylated and if acylation can be restricted to the surface, preserving crystallinities/morphologies. Consequently, we reexplore simple gas-phase acetylation of modern-day cellulosic building blocks – cellulose nanocrystals, pulps, regenerated fibre and aerog...
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#1Preeti Tyagi (NCSU: North Carolina State University)H-Index: 8
#2Joseph N. Gutierrez (NCSU: North Carolina State University)H-Index: 1
Last. Lokendra Pal (NCSU: North Carolina State University)H-Index: 11
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Abstract Residual hemp (Cannabis sativa) hurd fibers obtained from hydrothermal, carbonate, and kraft treatments were the resources used to obtain lignocellulosic nanofibers (LCNF) by using an ultra-fine friction grinder. The morphological, crystallinity, and chemical characteristics of the nanocellulose films were carried out using SEM, XRD, EDX and ToF-SIMS. Water barrier properties of the same were measured in terms of water contact angle, water vapor permeability (WVP) and water absorption. ...
3 CitationsSource
#1Soo Ah Jin (NCSU: North Carolina State University)H-Index: 2
#2Emily G. Facchine (NCSU: North Carolina State University)H-Index: 3
Last. Richard J. Spontak (NCSU: North Carolina State University)H-Index: 60
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Abstract Hypothesis Waterborne sulfopolyesters have gained considerable interest as coating materials due to their excellent film-forming and optical properties. Their commercial use has been limited, however, due to their fragile nature. Incorporating cellulose nanofiber (CNF), a sustainable biopolymer, into the polymer matrix is expected to enhance the mechanical integrity of the nanocomposite as these two components synergistically interact. Experiments In this study, we have investigated the...
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