Ticiane R Fiaschitello - Academia.edu (original) (raw)

Papers by Ticiane R Fiaschitello

Resumo Este estudo comparou três processos de tingimento sendo um com corante direto por esgotame... more Resumo Este estudo comparou três processos de tingimento sendo um com corante direto por esgotamento, um com pigmento urucum por processo convencional e um com pigmento urucum por processo especial. O processo especial com urucum apresentou maior intensidade colorística (K/S) do que o processo urucum convencional e menor valor de K/S do que o processo com corante direto, entretanto, foi o processo com menor consumo de água, 38 litros a menos do que o processo efetuado com corante direto e de 68 litros a menos do que o processo efetuado com urucum por esgotamento, demonstrando ser passível para aplicação industrial. A diferença entre os resultados dos ensaios de solidez à água e ao suor não foi significativa. Palavras chaves: redução de água, urucum, tingimento de algodão. Abstract This study compared three processes of dyeing, being one with direct dye, one with urucum pigment by conventional process and with urucum pigment by special process. The special process with urucum showed ...

Corantes naturais vêm ganhando importância devido aos menores danos à saúde e ao ambiente. Foi pr... more Corantes naturais vêm ganhando importância devido aos menores danos à saúde e ao ambiente. Foi proposta a avaliação do potencial do resíduo produzido no tratamento da madeira de eucalipto por vapor como corante natural de tecidos. Analisaram-se as características físicas e químicas do resíduo. Tingiram-se tecidos de algodão por processo de esgotamento utilizando o resíduo na concentração de 50% em relação à fibra, sem adição de sais metálicos. Foi avaliada também a adição dos sais metálicos, sulfato de ferro e sulfato de alumínio e potássio (alúmen), denominados mordentes, no banho de tingimento visando aumentar a gama de cores nos tecidos tingidos. Em seguida, avaliou-se a solidez de cor dos tecidos tingidos à lavagem, pela norma da ABNT. Tecidos tingidos tiveram nota 5 de transferência de cor. Isto mostrou que o tecido tingido não transfere sua cor para os tecidos brancos de nenhum tipo de fibra, o que demonstra que o tingimento com o resíduo de eucalipto tem características aceit...

Este estudo comparou três processos de tingimento sendo um com corante direto por esgotamento, um... more Este estudo comparou três processos de tingimento sendo um com corante direto por esgotamento, um com pigmento urucum por processo convencional e um com pigmento urucum por processo especial. O processo especial com urucum apresentou maior intensidade colorística (K/S) do que o processo urucum convencional e menor valor de K/S do que o processo com corante direto, entretanto, foi o processo com menor consumo de água, 38 litros a menos do que o processo efetuado com corante direto e de 68 litros a menos do que o processo efetuado com urucum por esgotamento, demonstrando ser passível para aplicação industrial. A diferença entre os resultados dos ensaios de solidez à água e ao suor não foi significativa.

O efeito de variáveis no tingimento com corantes sintéticos é bem conhecido, porém pouco avaliado... more O efeito de variáveis no tingimento com corantes sintéticos é bem conhecido, porém pouco avaliado nos corantes naturais. A natureza química complexa e difícil de ser determinada completamente dos corantes naturais, faz necessária uma avaliação de variáveis no tingimento têxtil visando conhecer o comportamento do corante natural nesse processo. Para tanto, o corante natural de eucalipto, obtido a partir do resíduo do tratamento da madeira de eucalipto por vapor, foi avaliado. As variáveis selecionadas para o estudo foram a concentração do corante no tecido, a forma de aplicação em pó e “in natura”, o tempo na temperatura constante, a temperatura máxima de tingimento, o pH do banho de tingimento, a adição de sais metálicos, sulfato de ferro e sulfato de alumínio e potássio. Os resultados de cor dos tingimentos foram avaliados estatisticamente. Uma vez definida a condição ótima do tingimento com o corante natural em algodão, foram também tingidos os tecidos de lã e nylon. Os tecidos tingidos com o corante natural de eucalipto apresentaram boa solidez de cor à lavagem e fricção e solidez à luz típica dos corantes naturais. O estudo de variáveis no tingimento permitiu o conhecimento do efeito destas na cor dos tecidos tingidos com o corante natural, bem como da definição de um método sistemático de avaliação das propriedades dos corantes naturais nos tingimentos de têxteis.

Natural dyes are gaining interest due their expected low risk to human health and to the environm... more Natural dyes are gaining interest due their expected low risk to human health and to the environment. In this study, the
wash fastness of a natural coloring matter from the liquid waste produced in the steam treatment of eucalyptus wood in textile fabrics was investigated. Specifically, eucalyptus wood extract was used to dye cotton, nylon and wool in an exhaust dyeing process without the addition of the traditional mordanting agents and then submitted to wash fastness analysis. The resulting dyed fabrics were evaluated for color fastness. It was found that wash fastness of dyed fabrics was very good to cotton and excellent to nylon and wool.

The underwear is in contact with very sensitive body parts. Synthetic dyes used in this segment, ... more The underwear is in contact with very sensitive body parts. Synthetic dyes used in this segment, besides generating large environmental impact, can cause human health problems such as
contact dermatitis. Natural dyes can be an alternative to them, some having even antimicrobial properties.

Textile Industry is increasingly researching for Cleaner Production improvements, such as new pro... more Textile Industry is increasingly researching for Cleaner Production improvements, such as new processes and materials. Natural dyes are gaining interest due their expected low risk to human health and the environment. In this study, the potential for using colored liquid waste produced in the steam treatment of eucalyptus wood as a natural coloring matter for textile cotton was investigated. Specifically, eucalyptus wood extract from waste eucalyptus wood steaming was used to dye cotton in an exhaust dyeing process without the addition of traditional mordanting agents. The resulting dyed fabrics were evaluated for color fastness. It was found that wash fastness of waste dyed fabrics was very good, while light fastness was typical of natural dyes. It ws also found excellent rubbing fastness ratings. In this regard, the waste from eucalyptus wood steaming is accepted as a new material on Cleaner Production strategies in Textile Industry applications in cotton dyeing.

The potential of the effluent waste produced in the distillation of eucalyptus leaves was evaluat... more The potential of the effluent waste produced in the distillation of eucalyptus leaves was evaluated as a natural material for the cotton dyeing. Selected physical-chemical parameters of the effluent and the concentrated were determined. The effluent and its concentrate showed acidic pH, and total solid content of, 3.4% and 48.1 % the content of condensed tannins, were 0.6% and 10.9%, respectively. The dyed fabric dye concentrations of 10 and 50%, based on the mass of the fabrics, had acceptable washing and light fastness according to test method CB-17, ABNT. After washing, the color change was evaluated as 3-4 for both concentrations. The multi-fiber fabric staining was greater than 4 for both concentrations. In the light fastness test, the color change was 2-3 and 3, at concentrations 10% and 50% respectively. The results showed that this solid waste has potential for cotton dyeing, with washing fastness properties acceptable by the textile industry. Further study is required to increase color fastness to light.

In wood processing, the production of residues is an unavoidable aspect to be considered. The use... more In wood processing, the production of residues is an unavoidable aspect to be considered. The use of wood residues is gaining importance due to the large amount generated and improper disposal, which can seriously harm environment. Burning of wood residues to energy generation is an increasingly usual practice. However, wood residues hold chemical substances that could be recovered before burning. These substances are the wood extractives, which may have many uses as natural dyes for fabrics, foods and cosmetics, as well as potential medicines. Thus, it is of great interest to study the effect of extractive removal on the calorific value of wood residues. In this work, the calorific value of three Brazilian wood species commonly used in sawmills (hymenaeacourbaril, jatoba; cedrelingacatenaeformis, cedroarana; tabebuiasp, ipe) and residues of urban trees pruning (caesalpiniaechinata, Brazil wood) were evaluated before and after extraction in hot water. In woods studied, the calorific value showed three patterns of behavior after removal of extractives soluble in hot water. For Brazil wood, the removal of extractives caused no significant change in calorific value. For cedroarana and jatoba, extractive removal led to a decrease in wood calorific value of 161.3 kcal·kg-1 and 40.1 kcal·kg-1, respectively, which indicates that the extractives from these species have a positive energy potential. Finally, for ipe, the removal of extractives resulted in an increase in calorific value of wood (67.6 kcal·kg-1), which might encourage the recovery of extractives from wood residues before burning for energy generation.

A presente invenção refere-se ao processo de obtenção de um extrato aquoso de Eucalipto (Eucalypt... more A presente invenção refere-se ao processo de obtenção de um extrato aquoso de Eucalipto (Eucalyptus sp) contendo corantes naturais a partir do resíduo de fonte renovável e/ou silvicultura, preferencialmente, o método de fabricação de óleo essencial, extrato aquoso puro e composição corante natural à base do extrato aquoso. Adicionalmente, o presente pedido trata do uso do extrato aquoso e/ou composição corante natural aplicado no tingimento têxtil de fibras celulósicas e/ou protéicas, do produto têxtil impregnado e seu uso.

Natural dyes are gaining interest due to their expected low risk to human health and the environm... more Natural dyes are gaining interest due to their expected low risk to human health and the environment. A source of natural dye was found in industrial operation of steaming Eucalyptus grandis wood. The liquid waste generated at the end of the process has been discarded. Due to this fact and the intensity of the color of the product, it was emerged the idea of this study, considering natural dye for textile fabrics. The waste was used for dyeing cotton, nylon and wool by exhaustion dyeing process. The effects of the dye concentration, the application in liquid and powder form, time, temperature, pH of the dyeing bath and the addition of metal salts in the bath were evaluated. The physic-chemical characteristics of the waste as pH, color, thin layer chromatography, and total solids and condensed tannins were also investigated. The resulting dyed fabrics were evaluated for color fastness to light, domestic washing and rubbing. The waste showed brown color, acidic pH, average total solids content of 2.2% and content of condensed tannins of 0.93%. The results from thin layer chromatography of the residue suggested the presence of tannic acid in its composition. Regarding the color fastness, it was found a very good result considering domestic washfastness, with lightfastness typical of natural dyes. The rubbing fastness was good, especially for cotton, which presented excellent grades. It was possible to consider the liquid residue as product potentially destined to the textile industry, regarding the natural dyeing of cotton, nylon and wool.

Currently, natural dyes are gaining interest in the society, creating a new market niche that val... more Currently, natural dyes are gaining interest in the society, creating a new market niche that values products obtained from natural raw materials, due to less damage to human health and the environment. A potential source for obtaining dye lies in industrial operation to obtain essential oil from eucalyptus leaves. It is a liquid waste generated in the distillation of the leaves, using water steam. A large volume of extract is generated and disposed as effluent of the process. Brazil is one of the worlds main producers of oil from eucalyptus leaves, especially Corymbia citriodora (formerly Eucalyptus), and there is, thus, significant potential for exploration of the effluent generated in the distillation of the leaves as raw material. With the support of a company in the oil production, it aimed to evaluate the potential of this extract as a natural dye, aiming at dyeing cotton. The characterization of waste effluent and natural dyestuff obtained was evaluated in terms of physical and chemical properties, such as total solids content, pH, density, condensed tannins content and color measurement by spectrophotometric analysis. In assessing the potential of the waste effluent as a natural dye, a study was conducted to determine the method of dyeing cotton, through various treatments which included changing variables such as temperature, time and concentration of natural dyestuff. In the dyed fabrics, it was evaluated the fastness properties of color in the light of a xenon arc and washing through the norms of the ABNT CB 17 - Textiles and Clothing. Both the waste effluent and the natural dyestuff presented an acid pH, total solids content of 3.4% and 48.1% and condensed tannin content of 0.6% and 10.9% respectively. Regarding the color of the extracts, both shown the brown color. The waste effluent had higher values of L*, a* b* than the natural dyestuff, and this was approximately to the black color, because the values of L*, a* b* were close to zero. The property with the larger variation in the colors of dyed fabrics was the L*. The values of E* also varied between treatments, with only treatment 9 was considered similar to reference 8, for this property. Concerning the results of washing fastness, the notes of color change were 3-4 for both concentrations of dye in dyed fabrics. The staining of the multi-fiber fabric was generally greater than 4 for both concentrations. For color fastness properties in light, dyed fabrics have the notes changed in the order of 2-3 and 3 for the concentrations 10% and 50%, respectively. In general, solidity results showed that natural dyestuff reached the acceptable notes for textile industry and the natural dyestuff obtained from waste effluent leaves of C. citriodora has a potential use as natural dyestuff in dyeing cotton.