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Dissertations / Theses on the topic 'Modifierad lignin'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 February 2022

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1

Xu, Xueyan. "Development of Kraft Lignin and Coating Technique to Prepare Coated Urea Fertilisers with Increased Nutrient Use Efficiency." Thesis, KTH, Skolan för kemivetenskap (CHE), 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-218111.

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Coating urea to prepare controlled release N-fertilizer has been considered as an effective way to increase its nutrient use efficiency, thus reduce its waste and the consequent harmful environmental impacts. Inorganic sulphur and synthetic polymers have been used in the industry as coating materials together with utilization of various types of expensive coating equipment which commonly requires also complicated technical setup and controls. As development trends, biopolymers are attention-grabbing to replace the synthetic polymers. Alternative simple coating technique is also desired. So far

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2

Prieur, Benjamin. "Modified lignin as flame retardant for polymeric materials." Thesis, Lille 1, 2016. http://www.theses.fr/2016LIL10083/document.

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Ce travail consiste à contribuer à la valorisation de la lignine, un sous-produit important de l’industrie du papier. L’objectif est d’utiliser la lignine comme retardateur de flamme (FR) pour les matériaux polymères. Dans un premier temps, la lignine fut phosphorylée. Des analyses structurales ont permis d’établir que du phosphore est lié de manière covalente à la lignine. La conséquence est que la stabilité thermique ainsi que la quantité de résidu charbonné sont fortement améliorées. Les lignines de départ et phosphorylée ont été incorporées dans des polymères thermoplastiques afin d’évalue

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3

Hepworth, David G. "The mechanical properties of tobacco plants with genetically modified lignin." Thesis, University of Reading, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.339456.

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4

Ahmed, Ismail Mostafa. "Modified lignin as replacement of carbon black in elastomers- For the development of sustainable tyre technology : The substitution of carbon black with modified lignin- Green tyre technology." Thesis, Karlstads universitet, Avdelningen för kemiteknik, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-78707.

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Due to its large flexibility, low-price, large availability, and properties lignin is seen as an important compound with a wide range of applications. The increasing demand of fossil-based rubber materials is causing a serious threat to the environment and it is contributing to plastic- and marine pollution, ozone depletion and carbon dioxide emission (CO2) [1,2]. Numerous toxicological researches highlight that Carbon black may act as a universal carrier of wide variety of chemicals of varying toxicity to the human body [3,4]. Consequently, researcher endeavours in finding sustainable and eco

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5

Roque-Rivera, Raysa. "Carbon budget and soil dynamics in response to lignin modified Populus tremuloides." abstract and full text PDF (UNR users only), 2009. http://0-gateway.proquest.com.innopac.library.unr.edu/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:1472974.

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6

Ni, Pei. "The synthesis of polyurethanes from non-modified lignin using a polymerization catalyst." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape3/PQDD_0028/MQ62141.pdf.

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7

Ma, Yujie, Petra Berends, René Pauli, Mark Wijland, Roberto Rumnit, and Rob Meulenbroek. "Lignin-Modified Phenolic Syntan - 129: A Contributor to Our Bio-Based Solutions." Verein für Gerberei-Chemie und -Technik e. V, 2019. https://slub.qucosa.de/id/qucosa%3A34175.

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Content: In order to contribute to a more sustainable leather manufacturing process and leather value chain, in 2016 Smit & zoon started its own designing process of new products through the Bio-Based innovation platform. As a logical first step, answers to several key questions have been looked for: What is Bio-Based? What is renewable? Which term and method do we use to define the Bio-Based content in the Bio-Based platform? What is biodegradable? How do our current products perform? What is our vision for future products? In the process of answering these questions and guided by the Cradle-

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8

Sutela, S. (Suvi). "Genetically modified silver birch and hybrid aspen:target and non-target effects of introduced traits." Doctoral thesis, Oulun yliopisto, 2014. http://urn.fi/urn:isbn:9789526206844.

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Abstract The efforts to improve forest trees could be accelerated by means of genetic engineering. Thus, the performance and effects of genetically modified (GM) trees have been investigated in numerous studies, which have generally concluded that GM trees have similar effects on environment and/or other organisms as do conventionally bred trees. In the present study, GM silver birch (Betula pendula Roth) and hybrid aspen (Populus tremula L. × tremuloides Michx.) lines were utilized to study the influence of transgenes to the transcription of related endogenous genes and to the production of s

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9

Wang, Di. "Sustainable corrosion protection for metallic materials by Mussel adhesive protein modified lignin film." Thesis, KTH, Materialvetenskap, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-275728.

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Lignin has the potential to be used as green material to inhibit the corrosion of metallic substrates. Mussel adhesive protein is used to modify lignin due to its great adhesive and film forming abilities. Electrochemical impedance spectroscopy (EIS) has been applied to in-situ measure the corrosion resistance of the formed surface composite films in the corrosive environment. The equivalent circuit is used to fit the EIS data to obtain the quantitative results of the surface films. The results show that MAP modified lignin composite film can provide enhanced corrosion protection to the carbon

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10

Mohammad, Zadeh Elham. "Physicochemical Properties and Antioxidant Activity of Enzymatic Modified Soy Protein Isolate Films with Lignin." Diss., Virginia Tech, 2016. http://hdl.handle.net/10919/83226.

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In this study, a sustainable packaging system was developed to provide food safety and security. Soy protein isolate (SPI) was enzymatically modified by transglutaminase under different conditions to ensure desirable and optimized enzyme crosslinking activity before film preparation. Physicochemical properties including viscosity and molecular weight distribution of the modified proteins and films were measured. Results confirmed the enzymatic treatment is an effective way to modify the SPI based biopolymeric film. Modified films with the enzyme had significant increases in tensile strength (

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11

Siochi, Emilie J. "Dilute solution studies of molecular weight distributions of nitrocellulose, modified lignins and PMMA graft polymers." Diss., Virginia Polytechnic Institute and State University, 1989. http://hdl.handle.net/10919/54423.

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Dilute solution properties of three difficult-to-analyze macromolecular systems were investigated and clarified. Two were notorious for having highly time-in-solution dependent properties, nitrocellulose and lignin, while the third was an ideal model branched methacrylate polymer with which to examine unanswered questions in polymer hydrodynamic behavior. Gel permeation chromatography with a differential viscosity detector (GPC/DV) was employed to study the dilute solution properties of various polymers, specifically their absolute molecular weight distributions and hydrodynamic behavior. Th

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12

Katahira, Rui. "Studies on cleavage of β-O-4 linkages in lignins : TIZ and modified nitrobenzene oxidation methods". Kyoto University, 2005. http://hdl.handle.net/2433/145053.

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Kyoto University (京都大学)<br>0048<br>新制・課程博士<br>博士(農学)<br>甲第11653号<br>農博第1509号<br>新制||農||911(附属図書館)<br>学位論文||H17||N4046(農学部図書室)<br>23296<br>UT51-2005-D402<br>京都大学大学院農学研究科森林科学専攻<br>(主査)教授中坪文明, 教授西尾嘉之, 教授松本孝芳<br>学位規則第4条第1項該当

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13

Chabane, Sofiane. "A modified enhanced transmission line theory as a solution to wiring configurations inconsistent with the classical transmission line theory - Application to vehicle harnesses." Thesis, Rennes, INSA, 2014. http://www.theses.fr/2014ISAR0013.

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Cette thèse présente, dans un premier temps, une nouvelle approche pour traiter les lignes de transmission, appelée la Théorie des Lignes de Transmission Améliorée et Modifiée (TLTAM). Cette extension du formalisme classique de la théorie des lignes de transmission est directement dérivée des équations de Maxwell et ne se limite pas à la seule prise en compte du mode transverse électromagnétique (TEM). Tout en conservant la simplicité du formalisme classique, cette extension aboutit à la définition de paramètres linéiques évolués et associés au mode antenne de la ligne de transmission. Cette s

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14

LIU, YU-YANG, and 劉宇陽. "Study of Modified Lignin / PP Composite Film." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/88583229054757796094.

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碩士<br>南臺科技大學<br>化學工程與材枓工程系<br>105<br>Proton exchange membrane fuel cells is one of the main areas of active research in recent years by many scholars. This study uses signing as the main component and then further modifies it in order to enhance its effectiveness in the fuel cell on the film. We select bamboo as the main because of fast growth cycle,environmental pollu-tion,and easier to obtain for preparing modified lignin.Which is produced with bam-boo powder through and a concentrated acid treatment using the preparated lignin. The ligning is sulfonated with grafted with maleic anhydride, c

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15

Chi, Chao-Chung, and 祁兆中. "The preparation of lignin modified PGS (poly glycerol sebacate) elastomer and phenolic carbon materials." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/wh69y7.

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