Browsing by Subject "Cellulose"
Now showing items 1-20 of 91
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Aplicaciones de materiales fibrosos moldeados procedentes de reciclaje: caso: trasdosados en rehabilitación de edificios
(Universitat Politècnica de Catalunya, 2014-12)
Master thesis
Open AccessLa investigación que se planteará a continuación se enfocará en el estudio de una propuesta de trasdosado de fibras prensadas y conformadas para que se simplifique e industrialice los actuales procesos en rehabilitación ... -
Aprovechamiento de un residuo papelero para la obtención de nanocelulosa
(OmniaScience, 2021-02-01)
Conference lecture
Open AccessLa constante búsqueda de mejoras productivas en la industria papelera y la creciente concienciación de la sociedad por los problemas derivados del uso de materiales procedentes de la industria petroquímica, hace que ... -
Assessing the enzymatic effects of cellulases and LPMO in improving mechanical fibrillation of cotton linters
(2019-06-26)
Article
Open AccessBackground: The increasing interest in replacing petroleum-based products by more sustainable materials in the packaging sector gives relevance to cellulose as a biodegradable natural resource. Moreover, its properties can ... -
Assessment of chemical and mechanical behavior of bamboo pulp and nanofibrillated cellulose exposed to alkaline environments
(2019-08-27)
Article
Open AccessThis study was performed to study the effects of the cement paste composition (calcium aluminate cement—CAC and a geopolymer in comparison to Portland cement—OPC) on bamboo pulp and nanofibrillated cellulose (NFC). The ... -
Bacterial cellulose for increasing barrier properties of paper products
(2018-08-07)
Article
Open AccessBacterial cellulose was combined with wood cellulose papers in order to obtain biomaterials with increased barrier properties. For this purpose, different parameters were assessed: two producing bacterial strains ... -
Bacterial cellulose matrices to develop enzymatically active paper
(2020-01-31)
Article
Open AccessThis work studies the suitability of bacterial cellulose (BC) matrices to prepare enzymatically active nanocomposites, in a framework of more environmentally friendly methodologies. After BC production and purification, ... -
Bionanocomposites based on 3-hydroxybutyrate-co-3-hydroxyvalerate (PHBV) and cellulose nanowhiskers (CNWs)
(Universitat Politècnica de Catalunya, 2016-07-09)
Bachelor thesis
Open AccessOver the past decade, bio-based polymers, especially in packaging, have gained a bigger role due to the over consuming of petrol derivates and the gradually growing concerns relating environment and sustainability issues. ... -
Cellulose nanocrystals: surface modification, applications and opportunities at interfaces
(2017-06-28)
Article
Open AccessCellulose nanocrystals (CNCs) are rod-like nano-scale particles that are widely available in nature and have recently gained great interest in both research and industry, due to their high strength, high crystallinity, ... -
Cellulose nanofiber nanocomposite pervaporation membranes for ethanol recovery
(American Chemical Society, 2021-01-12)
Article
Open AccessIn spite of the growing interest to exploit nanocellulose in membranes for water purification, reverse osmosis, packaging, and other applications, examples of nanocellulose-containing membranes for pervaporation are rather ... -
Challenges in synthesis and analysis of asymmetrically grafted cellulose nanocrystals via atom transfer radical polymerization
(2021-06-01)
Article
Open AccessWhen cellulose nanocrystals (CNCs) are isolated from cellulose microfibrils, the parallel arrangement of the cellulose chains in the crystalline domains is retained so that all reducing end-groups (REGs) point to one ... -
Characterization of composite biofilms of wheat gluten and cellulose acetate phthalate
(2004-06)
Article
Open AccessThe objective of this research was to develop and characterize composite biofilms produced using wheat gluten and cellulose acetate phthalate. Biofilms act as barriers to moisture and oxygen diffusion through the film. The ... -
Chemical modification of cellulose for electrospinning applications
(Universitat Politècnica de Catalunya / Tallinna Tehnikaülikool (Tallin University of Technology), 2013)
Bachelor thesis
Restricted access - author's decision
Covenantee: Tallinna TehnikaülikoolThe aim of the thesis is to develop technology for producing cellulose fatty acid esters that later will be used to produce fibrous materials by means of electrospinning. Main material of the study is cellulose-stearate ... -
Comparative evaluation of the action of two different endoglucanases. Part I: on a fully bleached, commercial acid sulfite dissolving pulp
(2015-04-19)
Article
Open AccessA fully bleached commercial acid dissolving pulp was treated with two endoglucanases, one obtained from Paenibacillus barcinonensis (B) and the other one produced from Cerrena unicolor (F) with the intention to improve ... -
Comparative evaluation of the action of two different endoglucanases. Part II: on a biobleached acid sulphite pulp
(2015-04-30)
Article
Open AccessA TCF sulphite pulp, bleached at the laboratory scale with a laccase–violuric acid system and complemented with a pressurized hydrogen peroxide stage, was treated with two endoglucanases, one obtained from Paenibacillus ... -
Composites of cellulose nanocrystals in combination with either cellulose nanofibril or carboxymethylcellulose as functional packaging films
(Elsevier, 2022-06-30)
Article
Open AccessCellulose nanocrystals (CNC) were mixed with either cellulose nanofibril (CNF) or carboxymethylcellulose (CMC) in variable proportions (0/100, 20/80, 40/60, 50/50, 60/40, 80/20 and 100/0) to obtain cast films with acceptable ... -
Conferring antioxidant capacity to cellulose based materials by using enzymatically-modified products
(2015-05-30)
Article
Open AccessA new, industrially feasible method for conferring cellulosic substrates antioxidant properties by using enzymatic products was developed. The method allows cellulose surfaces such as those of paper sheets to be conferred ... -
Cyclodextrin functionalization of several cellulosic substrates for prolonged release of antibacterial agents
(Wiley InterScience, 2012-11-13)
Article
Restricted access - publisher's policySeveral cellulosic substrates have been surface-functionalized with cyclomaltoheptaose (b-cyclodextrin, b-CD) using citric acid as a crosslinker agent to obtain new surface-modified materials able to release antiseptic ... -
Desarrollo de mortero con agregado a base de celulosa de papel
(Universitat Politècnica de Catalunya, 2019-05-17)
Master thesis
Restricted access - author's decisionLa presente investigación busca innovar entorno a los métodos constructivos y su aplicación de manera sostenible. La investigación se enfoca en la adición de la pulpa de celulosa de papel reciclado en el mortero, sirviendo ... -
Desenvolupament de mètodes analítics per la mesura de concentració de nanopartícules en aigua
(Universitat Politècnica de Catalunya, 2019-05-20)
Bachelor thesis
Open AccessEl treball va adreçat a posar a punt 3 mètodes d'anàlisi (UV, turbidimetria i digestió i anàlisi) per la determinació de la concentració de suspensions de nanopartícules en aigua. S'assajaran sistemes d'interès formats per ... -
Developing antioxidant capacity to cellulose-based materials by using enzymatically-modified products
(2015)
Conference lecture
Restricted access - publisher's policyIn the present work various laccases (Lac) and different phenolic compounds potentially possessing antioxidant action were used in an enzymatic reaction to prepare several functionalization solutions (FS), which were then ...
