Made available in DSpace on 2014-06-11T19:23:29Z (GMT). No. of bitstreams: 0 Previous issue date: 2007-05-14Bitstream added on 2014-06-13T19:50:15Z : No. of bitstreams: 1 silva_gs_me_bauru.pdf: 675573 bytes, checksum: 50fa95588cf3abdf7e9af02e4024a2e2 (MD5) / Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) / Este trabalho visa à obtenção e caracterização de tecidos e compósitos condutores de eletricidade obtidos a partir de borracha natural e tecidos de algodão tratados com polianilina (PANI). Os tecidos condutores de eletricidade foram obtidos introduzindo-se amostras do tecido de algodão no meio reacional da síntese química convencional da PANI. Este tecido, tratado com PANI, também foi recoberto com borracha natural e submetido à prensagem a quente, formando o compósito polimérico denominado BN/TC. Esse recobrimento protege o tecido condutor de agentes externos que podem danificá-lo (por exemplo, a exposição em meios básicos) provocando uma diminuição na condutividade elétrica. Para a caracterização dos materiais e amostras foram utilizadas as técnicas de análise termogravimétrica (TG), calorimetria exploratória diferencial (DSC), espectroscopia no infravermelho (FTIR) e microscopia eletrônica de varredura (MEV), análise dinâmico-mecânica (DMA), ensaio mecânico (tensão x deformação) e medidas elétricas. Os tecidos de algodão tratados com PANI apresentaram boa condutividade elétrica... / This work aims to prepare and characterize electrically conductive cotton and composites obtained from natural rubber and cotton fabric treated with polyaniline (PANI). The conductive composite was produced introducing cotton fabric samples in the solution of the conventional PANI chamical synthesis. The fabric treated with PANI (CF), was also covered with natural rubber and submitted to a pressure under heating during a short time, forming a composite denominated as NR/CF. Rubber coating protects the conductive fabric from external agents such as an alkaline media impeding the electric conductivity of the fabric to decrease. The characterization of the samples was made using the following techniques: thermogravimetry (TG), differential scanning calorimetry (DSC), attenuated total reflection Fourier transform infrared (ATR-FTIR) spectroscopy, scanning electronic microscopy (SEM), dynamic-mechanical analysis (DMA), mechanic test (stress x strain) and electric conduction measurements. The treated cotton fabric show a uniform deposition of the PANI and presents a good electric conductivity... (Complete abstract click electronic access below)

Orientador: Aldo Eloizo Job / Banca: José Alberto Giacometti / Banca: José Antonio Malmonge / Banca: Marystela Ferreira / O Programa de Pós-Graduação em Ciência e Tecnologia de Materiais, PosMat, tem caráter institucional e integra as atividades de pesquisa em materiais de diversos campi da Unesp / Resumo: Este trabalho visa à obtenção e caracterização de tecidos e compósitos condutores de eletricidade obtidos a partir de borracha natural e tecidos de algodão tratados com polianilina (PANI). Os tecidos condutores de eletricidade foram obtidos introduzindo-se amostras do tecido de algodão no meio reacional da síntese química convencional da PANI. Este tecido, tratado com PANI, também foi recoberto com borracha natural e submetido à prensagem a quente, formando o compósito polimérico denominado BN/TC. Esse recobrimento protege o tecido condutor de agentes externos que podem danificá-lo (por exemplo, a exposição em meios básicos) provocando uma diminuição na condutividade elétrica. Para a caracterização dos materiais e amostras foram utilizadas as técnicas de análise termogravimétrica (TG), calorimetria exploratória diferencial (DSC), espectroscopia no infravermelho (FTIR) e microscopia eletrônica de varredura (MEV), análise dinâmico-mecânica (DMA), ensaio mecânico (tensão x deformação) e medidas elétricas. Os tecidos de algodão tratados com PANI apresentaram boa condutividade elétrica... (Resumo completo, clicar acesso eletrônico abaixo) / Abstract: This work aims to prepare and characterize electrically conductive cotton and composites obtained from natural rubber and cotton fabric treated with polyaniline (PANI). The conductive composite was produced introducing cotton fabric samples in the solution of the conventional PANI chamical synthesis. The fabric treated with PANI (CF), was also covered with natural rubber and submitted to a pressure under heating during a short time, forming a composite denominated as NR/CF. Rubber coating protects the conductive fabric from external agents such as an alkaline media impeding the electric conductivity of the fabric to decrease. The characterization of the samples was made using the following techniques: thermogravimetry (TG), differential scanning calorimetry (DSC), attenuated total reflection Fourier transform infrared (ATR-FTIR) spectroscopy, scanning electronic microscopy (SEM), dynamic-mechanical analysis (DMA), mechanic test (stress x strain) and electric conduction measurements. The treated cotton fabric show a uniform deposition of the PANI and presents a good electric conductivity... (Complete abstract click electronic access below) / Mestre

Throughout history, the spread of microorganisms has caused much damage including infectious diseases and deaths. Ever since humans realized the impact of bacteria especially on population health many efforts have been done to combat the spread of pathogens. Textiles, as suitable environments for the growth of microorganisms are one of the major sources of epidemics. Therefore, producing antibacterial textiles can lessen the chances of transmission of microorganisms. In spite of effective protection antibacterial textiles offer, lack of comfort can result in less interest in the products from the users. The aim of this project is to use valve-jet printing as a resource-efficient finishing method to produce antibacterial textiles and measure its effect on comfort properties. As a natural, non-toxic, and biodegradable antibacterial agent, chitosan was chosen to be printed on cotton fabric. An ink with 0.5 w/v% concentration of chitosan dissolved in 1.5v/v% acetic acid was prepared and printed on cotton fabric through ChromoJet printer. The fabric was cured at 150°C for 1 minute to stabilize the chitosan on cotton. Three types of printed fabrics were produced with different number of printing passes. The samples were characterized by various methods to investigate the performance of printed chitosan ink on the antibacterial and comfort properties of the cotton fabric. Results indicate a successful printing of chitosan ink on cotton fabric through valve-jet printing method. Results further showed that multiple printing passes of chitosan ink on cotton fabric can result in higher antibacterial activity. However, with excessive increase of chitosan, the fabric compromises the hand feel and softness. Results also showed an increase in air permeability with the increment in the amount of chitosan on the cotton fabric, whereas capillary rise decreased with the increase of chitosan amount. Contact angle measurement and hydrostatic pressure test showed that between the printed and not-printed samples no big difference was observed in terms of hydrophilicity. The result of the thesis is of great importance as they introduce new printing process for the fabrication of antibacterial textile with comfort properties for various applications.

No description available.

The textile industry is one of the most polluting industries globally and needs to change to meet the UN's Sustainable Development Goals. Cotton fabric constitutes approximately 50% of all textiles. Its production is complex, and it is crucial to map all its processes to assess the environmental impact. Life cycle assessment (LCA) is a common tool to execute this, and there are software tools to simplify the conduction. However, the complexity of textile production, especially the pretreatment process, makes the assessments time-consuming. Therefore, this thesis examined how the environmental assessment of the cotton fabric could be more efficiently organised. The study was an exploratory single case study at a large furniture company. To pursue, the literature processed the topics of designing and producing cotton fabric, environmental assessment of cotton fabric, and organising environmental assessment. The results and analysis were formulated into the three themes: organising environmental assessment, environmental data management, and circularity. Also, the environmental data from the pretreatment process was presented. The discussion of the findings resulted in some conditions to organise for a more efficient environmental assessment of cotton fabric and applicable to other products. Based on the literature and empirics, the conditions were concluded in requirement, development, and potential. In general, the need for an extended LCA tool which enables comparison of processes and includes all sustainability aspects was discovered. Further, to organise the execution of environmental assessment more efficiently, the study clarified the importance of increasing communication and transparency. Meanwhile, extending the data management authority to experts in the textile department to relieve the environmental department. / Textilindustrin är en av de mest förorenande industrierna globalt och behöver förändras för att uppfylla FN:s hållbara utvecklingsmål. 50% av alla textilier består av bumull. Dess produktion är komplex och det är avgörande att kartlägga alla dess processer för att bedöma miljöpåverkan. Livscykelanalys (LCA) är ett vanligt verktyg för att utföra detta, och det finns mjukvaruverktyg för att förenkla utförandet. Komplexitet i textilproduktion, särskilt förbehandlingsprocessen, gör dock bedömningarna tidskrävande. Därför undersökte denna rapport hur miljöbedömningen av bomullstyget kan organiseras mer effektivt. Studien var en explorativ enskild fallstudie på ett stort möbelföretag. Litteraturen behandlade ämnena design och tillverkning av bomullstyg, miljöbedömning av bomullstyg och organisering av miljöbedömning. Resultaten och analysen formulerades i de tre teman: organisering av miljöbedömning, miljödatahantering och cirkularitet. Även miljödata från förbehandlingsprocessen presenterades. Diskussionen av empirin resulterade i förutsättningar för att organisera en mer effektiv miljöbedömning av bomullstyg, som även är tillämpbar på andra produkter. Baserat på litteraturen och empirin gavs förutsättningarna i form av krav, utveckling och potential. Sammanfattningsvis upptäcktes behovet av ett utökat LCA-verktyg som möjliggör jämförelse av processer och inkluderar alla hållbarhetsaspekter. Vidare, för att organisera genomförandet av miljöbedömningar mer effektivt, klargjorde studien vikten av att öka kommunikationen och transparensen. Dessutom utöka datahanteringsbehörigheten till experter på textilavdelningen för att avlasta miljöavdelningen.

Made available in DSpace on 2014-12-17T14:57:52Z (GMT). No. of bitstreams: 1 DucianeOF.pdf: 2916882 bytes, checksum: 4dd79fd7f32c69ce44eb80c291049409 (MD5) Previous issue date: 2009-08-24 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior / The 100% cotton fabric (CO)* treated with plasma of methane CH4 has direct application in all areas that needs of aqueous solutions repellent material like coatings and uniforms applied biomedical, aeronautics, and automobile between others. 100% cotton fabric (CO) samples were treated by plasma with two differents atmosphere: Methane gas (CH4), treatment time was varied in 10 in 10 min. until 60 min., and mixture methane/argon (CH4/Ar), it was varied the proportion 1:9, 2:8, 3:7, 4:6, 5:5, 6:4, 7:3, 8:2 e 9:1, with treatment time of 30 minutes. In both, the fluxe was 5 sccm (second cubic centimeter), pressure 6 mbar, voltage 490 V and current 0,15A. The objective of work was measure the superficial tension of 100% CO then it treated with plasma, using contact angle measures of water and glycerol with the surface. The samples were tested after treatment, with 8 and 12 months to verify the superficial modification effects. It was verified an increase of hydrophobility with the Sessile drop values varied between 116,69? to 137,85? and it carried on after 12 months. The no treated samples shows contact angle equal 0?. OES analysis and Raman spectroscopy were accomplished. In the SEM analysis was verified oligomers. The plasma treatment is correct environmental, It turning greater than conventional treatments / O tecido 100% Algod?o (CO)* tratado com plasma de metano (CH4) tem aplica??o direta em todas as ?reas que necessitam de um material com maior repel?ncia a solu??es aquosas, como revestimentos e uniformes aplicados a ?rea biom?dica, aeron?utica, automobil?stica, entre outras. Amostras de tecido 100% CO foram tratadas com plasma utilizando duas atmosferas diferentes: g?s CH4, com tempos que variaram de 10 em 10 min. at? 60 min., e uma mistura de metano/arg?nio (CH4/Ar), em propor??es 1:9, 2:8, 3:7, 4:6, 5:5, 6:4, 7:3, 8:2 e 9:1, durante 30 min. O fluxo utilizado nos dois processos foi de 5 cm3/s (cent?metro c?bicos por segundo), a uma press?o de 6 mbar , voltagem de 490 V e corrente de 0,15 A. O objetivo do trabalho foi medir a varia??o da tens?o superficial do tecido 100% CO ap?s tratado com plasma; Utilizando medidas de ?ngulo de contato da ?gua e do glicerol com a superf?cie. As amostras foram testadas imediatamente ap?s o tratamento, com 8 e 12 meses, a fim de verificar a dura??o do efeito desta modifica??o superficial. Verificou-se um aumento da hidrofobicidade atrav?s dos valores do teste da gota s?ssil que variaram entre 116,69? a 137,85? e se mantiveram ap?s 12 meses; As amostras n?o tratadas apresentam ?ngulo de contato igual a 0?. An?lises de espectroscopia de emiss?o ?tica (EEO) e espectroscopia Raman (ER) foram realizadas, bem como, an?lise de microscopia eletr?nica de varredura (MEV) a qual confirmou presen?a de olig?meros. O processo a plasma ? ambientalmente correto e se torna superior em compara??o aos tratamentos convencionais

[ES] La tecnología de microencapsulación se ha utilizado en áreas como farmacología, medicina, ingeniería y diseño. Centrado en el área de la ingeniería, más específicamente, la selección de materiales y el desarrollo de productos, el carácter simbólico, perceptivo y funcional se puede combinar para el diseño de productos innovadores. Mediante la tecnología de microencapsulación se combinan una amplia gama de materiales de núcleo y membrana, más específicamente en la área textil, la aplicación de microcápsulas puede proporcionar el desarrollo de tejidos y materiales funcionales con propiedades específicas. En este contexto, este trabajo se propone verificar las condiciones y analizar la síntesis de microcápsulas de aceite esencial de naranja (Citrus sinensis) y estudiar su comportamiento cuando se aplica a tejidos de algodón. Para la síntesis de microcápsulas de membrana polimérica de melamina-formaldehído con núcleo de aceite esencial de naranja (Citrus sinensis) se utilizó el método de polimerización in situ. El aceite esencial de naranja se caracterizó por cromatografía de gases, espectroscopia infrarroja por transformada de Fourier, termogravimetría, las microcápsulas sintetizadas se caracterizaron por espectroscopia infrarroja por transformada de Fourier, termogravimetría, microscopía electrónica de barrido y haz de iones enfocado. Las microcápsulas poliméricas con núcleo de aceite esencial de naranja sintetizadas se aplicaron al tejido algodón mediante tres métodos diferentes (impregnación, pulverización y estampación). Después de la aplicación sobre el tejido de algodón, se realizón prueba de frote, pruebas de lavado y prueba de actividad antibacteriana en laboratorio para estudiar el comportamiento de las microcápsulas sobre el sustrato. La caracterización de las muestras de tejido con las microcápsulas aplicadas, antes y después de las pruebas de durabilidad, se realizó mediante microscopía electrónica de barrido y espectroscopía infrarroja por transformada de Fourier. Al finalizar se sistematizaron los procedimientos, condiciones y parámetros para la polimerización in situ así como la aplicación de microcápsulas poliméricas con núcleo de aceite esencial de naranja (Citrus sinensis) en tejido 100 % algodón, avanzando en el estudio de la selección de materiales para aplicación en textiles que se puede utilizar para el desarrollo de productos innovadores. Los resultados mostraron que se produjo la microencapsulación del aceite esencial de naranja volátil y que las microcápsulas aplicadas al tejido de algodón presentan actividad antibacteriana y resistien quince ciclos de lavado utilizando la norma ISO 105 C06: 2010. / [CA] La tecnologia de la microencaspulació s'utilitza en àrees com farmacologia, medicina, enginyeria i disseny. Centrat en l'àrea de l'enginyeria específicament, la selecció dels materials i el desenvolupament de productes de caràcter simbólic, perceptiu i funcional es pot combinar per al disseny de productes innovadors. Mitjançant la tecnologia de la microencapsulació es combinen una àmplia gamma de materials de nucli i membrana, més específicament en l'àrea tèxtil, l'aplicació de microcàpsules pot proporcionar el desenvolupament de teixits i materials funcionals amb propietats específiques. En aquest context, aquest treball es proposa verificar les condicions i analitzar la síntesi de microcàpsules d'oli essencial de taronja (Citrus sinensis) i estudiar el seu comportament quan s'aplica als teixits de cotó. Per a la síntesi de microcápsules de membrana polimèrica de melanina-formalheid amb nucli d'oli essencial de taronja (Citrus sinensis) s'ha utilitzat el mètode de polimeritzacio in situ. L'oli essencial de taronja es va caracteritzar per cromatografia de gasos, espectroscòpia infraroja per transformada de Fourier, termogravimetria, les microcàpsules sintetitzades es caracteritzaven per espectroscopia infraroja per transformada de Fourier, termogravimetria, microscòpia electrònica d'escombrat i feix d'ions enfocat. Les microcàpsules polimèriques amb nucli d'oli essencial de taronja sintetitzades s'han aplicat al teixit de cotó mitjançant tres mètodes diferents (impregnació, pulverització i estampat). Després de l'aplicació sobre el teixit de cotó, s'ha realitzat prova de trot, prova de llavat i prova de activitat antibacteriana en laboratori per a estudiar el comportament de les microcàpsules sobre el sustrat. La caracterització de les mostres de teixit amb microcàpsules aplicades, abans i després de les proves de durabilitat, s'ha realitzat mitjançat microscòpia electrònica d'escombrat i espectroescòpia infraroja per transformada de Fourier. Al finalitzar la sistematització dels procediments, condicions i paràmetres per a la polimerització in situ així com l'aplicació de microcàpsules polimèriques amb nucli d'oli essencial de taronja (Citrus Sinensis) en teixit de cotó 100%, avançat en l'estudi de la selecció de materials per a l'aplicació en tèxtil que es puga utilitzar en el desenvolupament de productes innovadors. Els resultats han demostrat que s'ha produït la microencapsulació del oli essencial de taronja volàtil i que les microcàpsules aplicades al teixit de cotó presenten activitat antibacteriana han resistit quinze cicles de llavat utilitzant la normativa ISO 105 C06:2010. / [EN] Microencapsulation technology has been used in areas such as pharmacology, medicine, engineering and design. Focused on the engineering area, more specifically, material selection and product development, the symbolic, perceptive and functional character can be combined for the design of innovative products. Through microencapsulation technology, a wide range of core and membrane materials are combined, more specifically in the textile area, the application of microcapsules can provide the development of fabrics and functional materials with specific properties. In this context, this work proposes to verify the conditions and analyze the synthesis of microcapsules of orange essential oil (Citrus sinensis) and study their behavior when applied to cotton fabric. For the microcapsules synthesis of melamine-formaldehyde polymeric membrane with orange essential oil core (Citrus sinensis), the in situ polymerization method was used. The orange essential oil was characterized by gas chromatography, Fourier transform infrared spectroscopy, thermogravimetric, the synthesized microcapsules were characterized by Fourier transform infrared spectroscopy, thermogravimetric, scanning electron microscopy and focused ion beam. The polymeric microcapsules with an orange essential oil core synthesized were applied to cotton fabric by three different methods (impregnation, spraying and screen printing). After application on the cotton fabric, friction tests, washing tests and antibacterial activity tests were performed in the laboratory to study the behavior of microcapsules on the substrate. The characterization of fabric samples with the applied microcapsules, before and after the durability tests, was performed by scanning electron microscopy and infrared spectroscopy by Fourier transform. At the end, the procedures, conditions and parameters for in situ polymerization as well as the application of polymeric microcapsules with an orange essential oil core (Citrus sinensis) in 100 % cotton fabric were systematized, advancing the study of the selection of materials for application in textiles that can be used for the development of innovative products. The results showed that microencapsulation of the volatile orange essential oil occurred and that the microcapsules applied to the cotton fabric showed antibacterial activity and resisted fifteen washing cycles using the ISO 105 C06: 2010. / Soares Rossi, W. (2022). Síntesis, caracterización y aplicaciones de microcápsulas de aceite esencial de naranja (Citrus sinensis) en tejidos 100 % algodón [Tesis doctoral]. Universitat Politècnica de València. https://doi.org/10.4995/Thesis/10251/182096