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View article: Nanocellulose, a Promising Raw Material: Improving the Scalability of TEMPO-Mediated Oxidation Process
Nanocellulose, a Promising Raw Material: Improving the Scalability of TEMPO-Mediated Oxidation Process Open
Nanocellulose is a promising raw material due to its distinctive properties, including renewable origin, biodegradability, lightweight, and high mechanical strength. It has a very high potential to enhance products in a broad spectrum of a…
View article: Influence of swelling on the efficiency of TEMPO reaction, nanofibril production and characterization
Influence of swelling on the efficiency of TEMPO reaction, nanofibril production and characterization Open
This paper studies the effect of three swelling pretreatment processes (glycerol, alkaline, and molten salt hydrate) to improve the efficiency of 2,2,6,6-tetramethylpiperidine-N-oxyl (TEMPO)-mediated oxidation (TMO) to produce cellulose na…
View article: Gc-Ms Comparative Chemical Composition of Essential Oils and Volatile Compounds of Eryngium Planum L. Using Classical Hydrodistillation, Ultrasound-Assisted Hydrodistillation and Headspace Solid-Phase Microextraction. Antimicrobial Activity
Gc-Ms Comparative Chemical Composition of Essential Oils and Volatile Compounds of Eryngium Planum L. Using Classical Hydrodistillation, Ultrasound-Assisted Hydrodistillation and Headspace Solid-Phase Microextraction. Antimicrobial Activity Open
This study presents the extraction of essential oils and volatiles of Eryngium planum (E. planum) by classical hydrodistillation (HD), ultrasound-assisted hydrodistillation (UAHD) and headspace solid-phase microextraction (HS-SPME). The GC…
View article: Gc-Ms and Hplc Chromatographic Profile of Majority Volatile and Phenolic Compounds of Some Medicinal Plants From Romania
Gc-Ms and Hplc Chromatographic Profile of Majority Volatile and Phenolic Compounds of Some Medicinal Plants From Romania Open
This study reports the identification of volatile organic compounds (VOCs) and the phenolic composition for these medicinal plants: lemon balm (Melissa officinalis), lavender (Lavandula angustifolia), and elderflower (Sambucus nigra). The …
View article: Enhancement of the production of TEMPO-mediated oxidation cellulose nanofibrils by kneading
Enhancement of the production of TEMPO-mediated oxidation cellulose nanofibrils by kneading Open
The industrial use of TEMPO-mediated oxidation (TMO) reaction to produce highly fibrillated cellulose nanofibrils has been hindered by high catalyst costs, long reaction times and high reaction volumes. The hypothesis that cellulose concen…
View article: Improving sustainability of cellulose nanofibrils production: FTIR spectroscopy for online control of the synthesis of recyclable magnetic TEMPO catalyst
Improving sustainability of cellulose nanofibrils production: FTIR spectroscopy for online control of the synthesis of recyclable magnetic TEMPO catalyst Open
2,2,6,6-tetramethylpiperidine-N-oxyl (TEMPO) and its derivatives are well-established catalysts for various oxidation processes, despite its hazardous nature, causing harm to aquatic ecosystems. Thus, the reuse of TEMPO with a sustained hi…
View article: Fit-for-Use Nanofibrillated Cellulose from Recovered Paper
Fit-for-Use Nanofibrillated Cellulose from Recovered Paper Open
The cost-effective implementation of nanofibrillated cellulose (CNF) at industrial scale requires optimizing the quality of the nanofibers according to their final application. Therefore, a portfolio of CNFs with different qualities is nec…
View article: Nanocellulose from a colloidal material perspective
Nanocellulose from a colloidal material perspective Open
Cellulose nanomaterials present unique properties of interest for their many applications. Their behavior is mainly related to the colloidal properties that determine their self-assembly and stability mechanisms as well as their interactio…
View article: Recycling of TEMPO-mediated oxidation medium and its effect on nanocellulose properties
Recycling of TEMPO-mediated oxidation medium and its effect on nanocellulose properties Open
The potential of TEMPO (2,2,6,6-tetramethyl-1-piperidinyloxy)-mediated oxidation (TMO) to produce cellulose nanofibrils (CNFs) is hindered using costly and environmentally harmful catalysts, limiting its large-scale implementation. To prom…
View article: COMPARATIVE CHEMICAL AND ANTIMICROBIAL CHARACTERIZATION OF NON-OZONATED AND OZONATED VEGETABLE OILS
COMPARATIVE CHEMICAL AND ANTIMICROBIAL CHARACTERIZATION OF NON-OZONATED AND OZONATED VEGETABLE OILS Open
In this study, a comparative determination of the quality factors, chemical composition and antimicrobial activity for ozonated and non-ozonated olive, coconut and hemp oils was made. The following quality factors for non-ozonated and ozon…
View article: Modeling of Hexavalent Chromium Removal with Hydrophobically Modified Cellulose Nanofibers
Modeling of Hexavalent Chromium Removal with Hydrophobically Modified Cellulose Nanofibers Open
Cellulose nanofibers (CNF) are sustainable nanomaterials, obtained by the mechanical disintegration of cellulose, whose properties make them an interesting adsorbent material due to their high specific area and active groups. CNF are easil…
View article: Optimization of reagent consumption in TEMPO-mediated oxidation of Eucalyptus cellulose to obtain cellulose nanofibers
Optimization of reagent consumption in TEMPO-mediated oxidation of Eucalyptus cellulose to obtain cellulose nanofibers Open
Eucalyptus cellulose is usually pre-treated by oxidation with 2,2,6,6-tetramethylpiperidine-1-oxyl (TEMPO), NaBr and NaClO at pH 10.5 and 25 °C before the mechanical process required to obtain cellulose nanofibers (CNFs). In this study, di…
View article: Gel Point as Measurement of Dispersion Degree of Nano-Cellulose Suspensions and Its Application in Papermaking
Gel Point as Measurement of Dispersion Degree of Nano-Cellulose Suspensions and Its Application in Papermaking Open
The dispersion degree of cellulose micro and nanofibrils (CMFs/CNFs) in water suspensions is key to understand and optimize their effectiveness in several applications. In this study, we proposed a method, based on gel point (Øg), to calcu…
View article: Critical comparison of the properties of cellulose nanofibers produced from softwood and hardwood through enzymatic, chemical and mechanical processes
Critical comparison of the properties of cellulose nanofibers produced from softwood and hardwood through enzymatic, chemical and mechanical processes Open
Current knowledge on the properties of different types of cellulose nanofibers (CNFs) is fragmented. Properties variation is very extensive, depending on raw materials, effectiveness of the treatments to extract the cellulose fraction from…
View article: Pheromone monitoring of harmful Lepidopterae pre-sent in Bistrita area in apple and plum orchards
Pheromone monitoring of harmful Lepidopterae pre-sent in Bistrita area in apple and plum orchards Open
This study investigates the Lepidoptera order representatives among the pests present in apple and plum orchards in the central and northern part of the Bistrita region.This study aimed to find out which ones of the Lepidoptera pests are p…
View article: Correlation between rheological measurements and morphological features of lignocellulosic micro/nanofibers from different softwood sources
Correlation between rheological measurements and morphological features of lignocellulosic micro/nanofibers from different softwood sources Open
The transition of nanocellulose production from laboratory to industrial scale requires robust monitoring systems that keeps a quality control along the production chain. The present work aims at providing a deeper insight on the main fact…
View article: Recycled Fibers for Sustainable Hybrid Fiber Cement Based Material: A Review
Recycled Fibers for Sustainable Hybrid Fiber Cement Based Material: A Review Open
Reinforcing fibers have been widely used to improve physical and mechanical properties of cement-based materials. Most fiber reinforced composites (FRC) involve the use of a single type of fiber to improve cement properties, such as streng…
View article: Nanocellulose characterization challenges
Nanocellulose characterization challenges Open
Despite the extraordinary properties of nanocellulose (NC), as confirmed through two decades of exhaustive research, addressing an array of potential applications, the NC market is still far from reaching its full potential. Among the main…
View article: Traceability of Volatile Organic Compounds from Hypericum perforatum in Fresh and Dried Form and in Essential Oil
Traceability of Volatile Organic Compounds from Hypericum perforatum in Fresh and Dried Form and in Essential Oil Open
Microextraction in solid phase from headspace and GC-MS analysis was the method of studying the flowers of Hypericum perforatum in fresh and dry form.The essential oil obtained by hydrodistillation was also analyzed by GC-MS. Identificatio…
View article: Modelling the Mineralization of Formaldehyde by Treatment with Nitric Acid
Modelling the Mineralization of Formaldehyde by Treatment with Nitric Acid Open
Formaldehyde is a recalcitrant pollutant, which is difficult to remove from wastewater using conventional and advanced treatments. The objective of this research was to remove the organic matter from formaldehyde from an industrial wastewa…
View article: Analysis of Volatile Organic Compounds from the Aerial Parts of Medicinal Plant, Galium verum
Analysis of Volatile Organic Compounds from the Aerial Parts of Medicinal Plant, Galium verum Open
The Galium verum herb, (Rubiaceae family) is well represented in the spontaneous Romanian flora. She is one of the most used plants in traditional medicine. Our research aimed to investigate the chemical volatile profile in fresh, dried an…
View article: NANOCELLULOSE AND ITS POTENTIAL USE FOR SUSTAINABLE INDUSTRIAL APPLICATIONS
NANOCELLULOSE AND ITS POTENTIAL USE FOR SUSTAINABLE INDUSTRIAL APPLICATIONS Open
Nanocellulose (NC) and its wide applications have attracted high attention due to its desirable properties such as high surface area, extraordinary mechanical properties, high reactivity and easy modification of NC surface due to the prese…
View article: Cromathographic Profile of Volatiles of Multifloral and Unifloral Honey Collected by Apis Mellifera from Transilvania, Romania
Cromathographic Profile of Volatiles of Multifloral and Unifloral Honey Collected by Apis Mellifera from Transilvania, Romania Open
Chromatographic profile of volatiles organic compounds (VOCs) from several varieties of multifloral and unifloral honey produced in Transylvania, Romania, was analysed in order to determine the differences between them. VOCs collected usin…