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Journal ArticleDOI

Plant tannin and chitosan-templated cellulose for improved absorption of UV protective natural chromophores

TL;DR: In this article, a facile and sustainable modification of cellulose by plant tannins and chitosan polymer for higher impregnation of UV protective natural chromophores (UVPNCs) derived from the banana floral stem (BFS) was reported.
About: This article is published in Sustainable Chemistry and Pharmacy.The article was published on 2021-06-01. It has received 5 citations till now. The article focuses on the topics: Cellulose & Terminalia chebula.
Citations
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01 Jul 2021
TL;DR: In this article, the use of Turmeric extract as a usefull dye source and Citrus lemon, Colocasia esculenta bulk extract as biomordant could reckon a positive insight for cleaner textile manufacturing and dyeing.
Abstract: Textile coloration using synthetic dyes is not eco-friendly and has detrimental impact on wearer skin. Hence, natural dye is assumed as a suitable alternative for sustainable textile manufacturing and coloration. In this study, we utilized Turmeric (Curcuma longa L.) extract for cotton fabric dyeing. Additionally, biomordants (derived from Citrus lemon and Colocasia esculenta bulk) and metallic mordants (Potassium dichromate and Potash alum) pre-treatments were carried out to upturn the overall uptake of dyes into the fabric interior. The resulted color-strength (K/S) of biomordant pretreated sample was two times higher (K/S=8.6) than the metal mordanted sample (K/S=4.0). To investigate the fastness properties of dyed fabric varities, colorfastness to rub (dry and wet), wash, water, and perspiration test were performed and found superior result for bio-crosslinkers compared to metallic salts chelation. Futhermore, the visual uniformity and moisture absorption on the hue (h*) by the final dyed samples were also found excellent in both mordanted dyed fabrics. Thereby, this dyeing process propossed the viability of natural dyestuff with synthetic auxiliaries for facile cotton fabric coloration. Therefore, the utilization of Turmeric extract as a usefull dye source and Citrus lemon, Colocasia esculenta bulk extract as biomordant could reckon a positive insight for cleaner textile manufacturing and dyeing.

23 citations

Journal ArticleDOI
TL;DR: In this paper, a single-jersey knitted fabric composed of cellulose-enriched 100% natural fiber (cotton) with an areal density of 172 GSM was used in an experiment to assess the modification of the cotton fabric surface by utilizing silver nanoparticles (AgNPs) and introducing functional properties along with sustainable dyeing performance.
Abstract: Multifunctional fabrics using conventional processes have piqued increasing global interest. The focus of this experiment was to assess the modification of the cotton fabric surface by utilizing silver nanoparticles (AgNPs) and introducing functional properties along with sustainable dyeing performance. A single-jersey knitted fabric composed of cellulose-enriched 100% natural fiber (cotton) with an areal density of 172 GSM was used in this study. The standard recipe and test methods were employed. FTIR-ATR spectra were used to determine the fixing of AgNPs onto the fiber surface. A comparative assessment was conducted in response to the distribution of color, color fastness to wash, water, perspiration, rubbing, and light. Scanning electron microscopy (SEM) was used to characterize the surface of nano-Ag-deposited specimens. In terms of functional properties, antimicrobial activity was scrutinized. Our findings reveal that the nanoparticles impart remarkable antibacterial effects to cellulose-enriched fabric against S. aureus (Gram-positive) and E. coli (Gram-negative). Direct dyes were used for dyeing the proposed samples, resulting in enhanced dyeing performance. Except for light fastness, the samples dipped with AgNPs showed outstanding color levelness and color durability characteristics. The developed fabrics can be applied in a wide range of functions, including protective clothing, packaging materials, and healthcare, among others.

4 citations

Journal ArticleDOI
TL;DR: In this article , Alanya silk was dyed by a natural dyeing method with crocus sativus, Helichrysum arenarium, and Glycyrrhiza glabra L., plants that grow in and around the Alanya region.
Abstract: The textile industry is one of the most complex sectors, in terms of the materials and chemical processes used from petroleum and the environmental degradation during its production and disposal. It is therefore a sector looking for new possibilities and for more sustainable materials and applications. One option is to use natural dyes, as they are considered biodegradable, do not pollute the environment, and have potential use for many sectors, including the fashion industry. In this study, Alanya silk was dyed by a natural dyeing method with crocus sativus, Helichrysum arenarium, and Glycyrrhiza glabra L., plants that grow in and around the Alanya region. Quercus aegilops L. grown in the region was preferred as mordant, a natural binder, and is one of the plants with the highest tannin content, and it was used with a more environmentally friendly and sustainable approach to increase the binding in natural dyeing instead of chemical mordants. The aim is to provide an environmental and scientific contribution to the dyeing producers in this region. According to the MAUT (Multi-Attribute Utility Theory) method, the best dyes in terms of fastness and color efficiency were determined as the dyes made with the Glycyrrhiza glabra L. plant.
Journal ArticleDOI
TL;DR: In this paper , the incorporation of tannin in bio-composite biodegradable thermoset materials (BTM) based on poly (lactic acid), starch, sugarcane fiber, and nutrient compounds, to achieve an alternative material for conventional plastics processed by injection molding aiming environmental applications was investigated.
Abstract: The incorporation of tannin in bio-composite biodegradable thermoset materials (BTM) based on poly (lactic acid), starch, sugarcane fiber, and nutrient compounds, to achieve an alternative material for conventional plastics processed by injection molding aiming environmental applications was investigated. The biodegradation of injection molded BTM dog-bone shape specimens prepared with and without incorporation of 1% tannin extract was evaluated up to 60 days with overall characterization by scanning electron microscopy, Fourier transform–infrared spectroscopy, thermogravimetric analyzer, and X-ray diffraction. The BTM produced with 1% tannin showed reduced molding defects with an increased productivity of up to 82%, improved mechanical properties and reduced biodegradation of samples buried in an organic substrate. Based on physicochemical characterization, the observed delay in biodegradation of BTM induced by tannin is suggested to result from its tight interaction with the starch and lignocellulosic fibers, acting as antimicrobial agent and reducing the hydrophilicity of blends. Natural polyphenols such as tannins are suitable additives to improve the processability of injection molded bio-composites and to extend the lifetime of biodegradable materials subjected to contact with high microbial load substrates, such as pots and buckets used to grow plants.
References
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Journal ArticleDOI
TL;DR: This corrects the article DOI: 10.1038/ncomms14778 to indicate that the author of the paper is a doctor rather than a scientist, as previously reported.
Abstract: Nature Communications 8: Article number: 14778 (2017); Published: 16 March 2017; Updated: 24 May 2017 In Fig. 5 of this Article, the image in the centre column for [111] incorrectly replicates the image above. The correct version of Fig. 5 appears below as Fig. 1.

383 citations

Journal ArticleDOI
TL;DR: In this article, Azide modified cellulose dissolved in dimethylacetamide/lithium chloride (DMAc/LiCl) was reacted with propargylated lignin to produce 0.5, 1, and 2% by weight cellulose-lignin containing materials.
Abstract: There is significant interest in biodegradable and transparent UV protection films from renewable resources for many different applications. Herein, the preparation and characterization of semitransparent flexible cellulose films containing low amounts of covalently bonded lignin with UV-blocking properties are described. Azide modified cellulose dissolved in dimethylacetamide/lithium chloride (DMAc/LiCl) was reacted with propargylated lignin to produce 0.5%, 1%, and 2% by weight lignin containing materials. Cellulose-lignin films were prepared by regeneration in acetone. These covalently bonded cellulose-lignin films were homogeneous, unlike the simple blends of cellulose and lignin. Prepared films showed high UV protection ability. Cellulose film containing 2% lignin showed 100% protection of UV-B (280–320 nm) and more than 90% of UV-A (320–400 nm). The UV protection of prepared films was persistent when exposed to thermal treatment at 120 °C and UV irradiation. Thermogravimetric analysis of the films s...

259 citations

Journal ArticleDOI
TL;DR: In this paper, an environmentally friendly procedure for surface modification of cellulose nanocrystals (CNCs) in water is presented, where Tannic acid (TA), a plant polyphenol, acts as the primer when mixed with CNCs in suspension, which are then reacted with decylamine (DA), the hydrophobe.
Abstract: An environmentally friendly procedure for the surface modification of cellulose nanocrystals (CNCs) in water is presented. Tannic acid (TA), a plant polyphenol, acts as the primer when mixed with CNCs in suspension, which are then reacted with decylamine (DA), the hydrophobe. Schiff base formation/Michael-type addition covalently attaches primary amines with long alkyl tails to CNC-TA, increasing the particle hydrophobicity (contact angle shift from 21 to 74°). After modification, the CNC-TA-DA particles in the water phase separate, allowing for easy collection of modified material. The dried product is readily redispersible in toluene and other organic solvents, as demonstrated by turbidity measurements, dynamic light scattering, optical microscopy, and liquid crystal self-assembly behavior. Electron microscopy, Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, solid-state 13C NMR, and X-ray diffraction support the successful surface modification and indicate that CNC particle mo...

161 citations

Journal ArticleDOI
TL;DR: In this article, the effect of plasma treatment on surface modification of most used natural (wool, cotton, and silk) and synthetic fibers (polyester, nylon, and acrylic) and its subsequent effects on their dying with natural dyes.

154 citations

Journal ArticleDOI
TL;DR: Analysis of crystallinity changes in cellulose using CBMs offers a new and advantageous method of qualitative and quantitative assessment of changes to the structure of cellulose that occur with sodium hydroxide treatment.

147 citations