scholarly journals Effect of Chlorophyll Hybrid Nanopigments from Broccoli Waste on Thermomechanical and Colour Behaviour of Polyester-Based Bionanocomposites

Polymers ◽  
2020 ◽  
Vol 12 (11) ◽  
pp. 2508
Author(s):  
Bàrbara Micó-Vicent ◽  
Marina Ramos ◽  
Francesca Luzi ◽  
Franco Dominici ◽  
Valentín Viqueira ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Sodium Dodecyl ◽  
Natural Dyes ◽  
Inorganic Filler ◽  
Synthetic Dyes ◽  
Colour Properties ◽  
Reinforcement Effect ◽  
Limited Effect ◽  
Calcined Hydrotalcite ◽  
Potential Use

Natural dyes obtained from agro-food waste can be considered promising substitutes of synthetic dyes to be used in several applications. With this aim, in the present work, we studied the use of chlorophyll dye (CD) extracted from broccoli waste to obtain hybrid nanopigments based on calcined hydrotalcite (HT) and montmorillonite (MMT) nanoclays. The synthesized chlorophyll hybrid nanopigments (CDNPs), optimized by using statistical designed experiments, were melt-extruded with a polyester-based matrix (INZEA) at 7 wt% loading. Mechanical, thermal, structural, morphological and colour properties of the obtained bionanocomposites were evaluated. The obtained results evidenced that the maximum CD adsorption into HT was obtained when adding 5 wt% of surfactant (sodium dodecyl sulphate) without using any biomordant and coupling agent, while the optimal conditions for MMT were achieved without adding any of the studied modifiers. In both cases, an improvement in CD thermal stability was observed by its incorporation in the nanoclays, able to protect chlorophyll degradation. The addition of MMT to INZEA resulted in large ΔE* values compared to HT incorporation, showing bionanocomposite green/yellow tones as a consequence of the CDNPs addition. The results obtained by XRD and TEM revealed a partially intercalated/exfoliated structure for INZEA-based bionanocomposites, due to the presence of an inorganic filler in the formulation of the commercial product, which was also confirmed by TGA analysis. CDNPs showed a reinforcement effect due to the presence of the hybrid nanopigments and up to 26% improvement in Young’s modulus compared to neat INZEA. Finally, the incorporation of CDNPs induced a decrease in thermal stability as well as limited effect in the melting/crystallization behaviour of the INZEA matrix. The obtained results showed the potential use of green natural dyes from broccoli wastes, adsorbed into nanoclays, for the development of naturally coloured bionanocomposites.

Investigating the Potential Use of Cassava Leaf Extract as a Natural Coloring Substance for Fabrics

2020 ◽  
Vol 991 ◽  
pp. 123-128
Author(s):  
Suharno Rusdi ◽  
M. Yusuf Zakaria ◽  
Rifki N.F. Aditya ◽  
Achmad Chafidz
Keyword(s):  
Leaf Extract ◽  
Extraction Process ◽  
Market Potential ◽  
Natural Dyes ◽  
Cotton Cloth ◽  
Synthetic Dyes ◽  
Color Fastness ◽  
Cassava Leaves ◽  
Textile Industries ◽  
Potential Use

In this modern era, most of the textile industries used synthetic dyes for coloring their fabrics. The reason why most of textile companies use synthetic dyes is that synthetic dyes are easier to obtain, the availability of colors is guaranteed, vast variety of colors, good color fastness. Nevertheless, the use of synthetic dyes in the textile industries has caused environmental problems if the waste not treated properly. Additionally, synthetic dyes commonly contain chemicals which are not good for human health. They can cause cancer, attack the nerves of the brain, etc. Therefore, most of people now focus on using natural dyes as alternative to subtitute synthetic dyes. Nowdays, in Indonesia, naturally-dyed textile products, such as Batik tulis (using natural dyes) has a high market potential as a superior commodity of Indonesian products to enter the international market. Therefore, to develop the use of natural dyes in the textile industries, it is necessary to explore the sources of natural dyes from various potential natural resources in Indonesia. Most of these natural dyes are coming from the plants. Cassava leaf is widely known and used for cooking by the people of Indonesia. Based on the literature, cassava leaf contains natural pigments such as chlorophyll a, chlorophyll b, xanthophyll, carotene, and anthocyanin Based on this, we took the initiative to conduct research to investigate the potential use of cassava leaves extract as natural coloring substance for coloring fabrics. In this research, Cassava leaf extract has been obtained via solid-liquid extraction process using two different solvents, ethanol (96%) and n-hexane. From this study, it was found that the most optimum extract resulted from the extraction process was about 1.67% with ratio of cassava leaves and ethanol solvent of 1:10. This extract was then used for coloring the cotton cloth. After colored, the cloth was then tested for its color fastness by two methods, namely rub method and washing with soap. From the test results, it was found that the fabric dyed with cassava leaf extract was not much able to withstand against rubbing and washing with soap. Based on this result, further research is needed, such as using other agents during the mordanting and fixation processes

Sustainable ultrasound-assisted ultralow liquor ratio dyeing of cotton fabric with natural turmeric dye

2019 ◽  
Vol 90 (5-6) ◽  
pp. 685-694 ◽  
Author(s):  
Xiaofei Ma ◽  
Yujuan Wei ◽  
Shuo Wang ◽  
Xin Zuo ◽  
Baolei Shen
Keyword(s):  
Cotton Fabric ◽  
Textile Industry ◽  
Sodium Dodecyl ◽  
Ultrasonic Waves ◽  
Natural Dyes ◽  
Synthetic Dyes ◽  
Ultrasonic Power ◽  
Fiber Damage ◽  
Liquor Ratio ◽  
Ultrasonic Assisted

Natural dyes are environmentally friendly and have become important alternatives to synthetic dyes in some dyeing products. Therefore, better extraction and dyeing techniques need to be developed for the dyeing process of natural dyes. In this work, cotton fabric was dyed using turmeric extraction solution under an ultralow liquor ratio (materials to liquor ratio of 1:5) and ultrasonic-assisted conditions. Dye extraction using different dispersants and pH values has been investigated and three-factor-three–level Box–Behnken design was employed to explore the dyeing conditions. It was found that sodium dodecyl sulfate systems and ultrasonic waves can effective improve the dyeing depth under neutral condition. The K/ S value can reach 2.53 with ultrasonic power of 200 W, dyeing time of 30 min and temperature of 40℃. Scanning electron microscope images showed that the application of ultrasound did not cause obvious fiber damage. The developed technique could be used in the textile industry to make dyeing cotton fibers with natural dyes more sustainable than it is at present.

scholarly journals Effect of Lemon Waste Natural Dye and Essential Oil Loaded into Laminar Nanoclays on Thermomechanical and Color Properties of Polyester Based Bionanocomposites

Polymers ◽  
2020 ◽  
Vol 12 (7) ◽  
pp. 1451 ◽  
Author(s):  
Bàrbara Micó-Vicent ◽  
Valentin Viqueira ◽  
Marina Ramos ◽  
Francesca Luzi ◽  
Franco Dominici ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Essential Oil ◽  
Sodium Dodecyl ◽  
Color Space ◽  
Natural Dye ◽  
Potassium Sulfate ◽  
Color Properties ◽  
Calcined Hydrotalcite ◽  
Bright Yellow ◽  
Yellow Color

In this work, polyester-based nanocomposites added with laminar nanoclays (calcined hydrotalcite, HT, and montmorillonite, MMT) loaded with lemon waste natural dye (LD) and essential oil (LEO) were prepared and characterized. The optimal conditions to synthetize the hybrid materials were obtained by using statistically designed experiments. The maximum LD adsorption with HT was found using 5 wt% of surfactant (sodium dodecyl sulfate), 5 wt% of mordant (aluminum potassium sulfate dodecahydrate) and 50% (v/v) ethanol. For MMT, 10 wt% of surfactant (cetylpyridinium bromide), 5 wt% of mordant, 1 wt% of (3-aminopropyl) triethoxysilane and 100% distilled water were used. LEO adsorption at 300 wt% was maximized with MMT, 10 wt% of surfactant and 50 °C following an evaporation/adsorption process. The obtained hybrid nanofillers were incorporated in a polyester-based matrix (INZEA) at different loadings (3, 5, and 7 wt%) and the obtained samples were characterized in terms of thermal stability, tensile behavior, and color properties. HT_LEM-based samples showed a bright yellow color compared to MMT_LEM ones. The presence of lemon hybrid pigments in INZEA-based systems produced a remarkable variation in CIELAB color space values, which was more visible with increasing the nanofillers ratio. A limited mechanical enhancement and reduced thermal stability was observed with the nanopigments addition, suggesting a limited extent of intercalation/exfoliation of MMT and HT in the polymer matrix. MMT_LEM pigments showed higher thermal stability than HT_LEM ones. A significant increase in Young’s modulus of nanocomposites loaded with hybrid LEO was observed compared to the biopolymer matrix. The LEO inclusion into the nanoclays efficiently improved its thermal stability, especially for MMT.

XYLANASE, AN ENVIRONMENTALLY FRIENDLY BLEACHING AGENT FOR PULP AND PAPER: Characterization And Stabilization Study Of Bacillus licheniformis I-5 CRUDE Xylanase

2018 ◽  
Vol 7 (3) ◽  
Author(s):  
Budiasih Wahyuntari., dkk
Keyword(s):  
Thermal Stability ◽  
Bacillus Licheniformis ◽  
Hot Spring ◽  
Sodium Dodecyl ◽  
Luria Broth ◽  
Crude Enzyme ◽  
Half Time ◽  
Triton X100 ◽  
Sds Page ◽  
Xylanolytic Enzymes

Isolate I-5 was isolated from Ciseeng hot spring, West Java and was identified as Bacillus licheniformis I-5. The isolate produces extracellular xylanolytic enzymes on Oatspelt containing Luria broth agar medium. Optimal activity of the crude enzyme was  observed at 50ºC and pH 7. The effect of sodium dodecyl sulphate, b-mercaptoethanol and Triton-X100 were observed. Incubating the crude enzyme in 1.5% SDS and 1.5% b-mercaptoethanol at 50oC for 90 minutes then adding Triton-X100 at final concentration of 3.5% for 45 minutes only reduced 5.75% of the initial enzyme activity. SDS/PAGE and zymogram analysis showed that at least two xylanolytic enzymes presence in the crude enzyme. The molecular weight of the enzyme was estimated about 127 and 20kD. The enzyme hydrolysed xylan into xylobiose, xylotriose and other longer xylooligosaccharides. Thermal stability of the crude enzyme was observed at 50, 60, and 70oC and pH 7 and 8. The results showed that the half time of the crude enzyme incubated at 50, 60, and 70oC pH 7 was 2 hours 55 minutes; 2 hours 33 minutes and 1 hour 15 minutes respectively. The half time at 50, 60 and 70oC, pH 8 was 2 hours 48 minutes; 1 hour 22 minutes and 1 hour 9 minutes respectively.keywords: Xilanase, Bacillus licheniformis I-5, thermal stability

Biocompatiblibility analysis of the decellularized bovine pericardium

2020 ◽  
Vol 8 (2) ◽  
Author(s):  
A. Sokol ◽  
◽  
D. Grekov ◽  
G. Yemets ◽  
O. Galkin ◽  
...  
Keyword(s):  
Tissue Engineering ◽  
Sodium Dodecyl ◽  
Bovine Pericardium ◽  
Surrounding Tissue ◽  
Tissue Samples ◽  
Group I ◽  
Alternative Material ◽  
Decellularized Scaffolds ◽  
Group 2 ◽  
Potential Use

The decellularized bovine pericardium and its potential use as a natural scaffold is a promising approach in the field of tissue engineering and regenerative medicine. The reaction of the host toward decellularized scaffolds depends on their biocompatibility, which should be satisfied being before applied in clinical use. Purpose: to evaluate the biocompatibility of the extracellular matrices, which were decellularized by trypsin enzyme and anionic sodium dodecyl sulfate (SDS) detergent. Material and methods. Pericardial sacs were acquired from 12-18 months’ age bulls. Tissue decellularization was performed by using 0.25 % Trypsin solution and 1 % ionic SDS for group I and 0.1 % SDS for group II samples. The implantation was performed on Wistar rats. The tissue samples were stained with hematoxylin & eosin, Congo red and Masson's Trichrome for histological analysis. Results. In group 1 in 3 months after subcutaneous implantation in rats we noticed the inflammation in surrounding tissue and degradation of the implant. Under the same conditions in animals of group 2 implant replacement with growing immature connective tissue was noted. Bio-implant of this group did not degrade, moreover it's integrated to the tissues of experimental rats. Conclusion. Our results showed that decellularized bovine pericardium by 0.1 % SDS can become an alternative material for tissue engineering and has the potential for further use in human surgery.

FASTNESS PROPERTIES OF COLOURANTS EXTRACTED FROM LOCUST BEANS AND TAMARIND FRUITS PODS

2013 ◽  
Vol 1 (2) ◽  
pp. 21-34
Author(s):  
IBRAHIM ABDULLAHI UMAR
Keyword(s):  
Natural Dyes ◽  
Synthetic Dyes ◽  
Fastness Properties ◽  
Colour Fastness ◽  
Comparative Analyses ◽  
Silk Fabrics

Kepentingan meningkat untuk pewarna semulajadi bermula beberapa tahun lalu tetapi di pihak pengguna, manfaat tersebut hanya mula dirasai. Pewarna asli dianggap sebagai pewarna mampan dan mesra alam; mereka boleh menghasilkan warna yang berbeza warna dan mempunyai ketahanan luntur yang lebih rendah daripada pewarna sintetik. Oleh itu, kertas kerja ini dikaji pada sifat kubu daripada pewarna yang diekstrak daripada kacang belalang dan buah-buahan asam buah.Warna-warna ini dipetik menggunakan kaedah berair dan pelarut dan telah digunakan di dataran terluntur ditenun kapas dan sutera kain.Yang digunakan bagi pedas meningkatkan penembusan warna (pewarna) dan sampel dicelup telah tertakluk kepada ujian kubu (membasuh, menggosok, peluh & ujian cahaya). Perbandingan analisis kepada tahap pewarnaan telah direkodkan dan ujian kubu baik daripada analisis membuktikan bahawa; warna boleh digunakan sebagai pewarna pada kapas dan sutera kain.   An interest for natural dyes increased several years ago but on the part of the consumers, the benefits are just beginning to be felt. Natural dyes are considered as sustainable and ecofriendly dyes; they can produce different shades of colours and have lower colour fastness than synthetic dyes. Therefore, this paper researched on the fastness properties of colorant extracted from locust beans and tamarind fruits pods. The colours were extracted using aqueous and solvent methods and were applied on bleached plain weaved cotton and silk fabrics. The use of mordant increased the penetration of the colours (dyes) and the dyed samples were subjected to fastness test (washing, rubbing, perspiration & light test). Comparative analyses on the degree of staining were recorded and good fastness test from the analysis proved that; the colours can be used as dyes on cotton and silk fabrics.

scholarly journals Pemberdayaan Kelompok Tenun Nari-Nari Melalui Pewarnaan Benang Menggunakan Ekstrak Kayu Kuning Dan Kayu Mahoni

2020 ◽  
Vol 5 (2) ◽  
pp. 446-452
Author(s):  
Ruslan R ◽  
Agrippina Wiraningtyas ◽  
Ahmad Sandi ◽  
Muhammad Nasir
Keyword(s):  
Natural Dyes ◽  
Raw Material ◽  
Woven Fabric ◽  
Synthetic Dyes ◽  
Community Group ◽  
Training Stage ◽  
Red Color ◽  
Different Color ◽  
Fabric Production ◽  
The Cost

The "Nari-Nari" Weaving Village in Rabadompu Timur Village, Bima City, is a community group engaged in the weaving industry which has been carried on for generations. During this time, Bima woven fabric products use yarn raw material that has been colored using synthetic dyes. Yarn with synthetic dyes has a more diverse color, the fabric coloring process is easier and the cost is cheap, but synthetic dyes are carcinogenic and harmful to the environment. The solution to the problems faced by using natural dyes obtained from plants. This activity aims to train the Nari-Nari weaving group in yarn coloring using natural dyes. The method used is training through several stages of the activity namely the stage of socialization of activities; the training stage of yarn dyeing and woven fabric production. The dyes used are yellow wood extract and mahogany wood. The results obtained in this activity are the colored yarn has a different color based on the extract of the dye and fixation material. In yellow wood obtained with a maroon red color on alum, black on tunjung and reddish beige on lime. In mahogany wood is obtained beige on alum, black gray on tunjung and beige on lime.  

scholarly journals The Application of Mahagony Bark (Swietenia Mahagony L.) for Natural Dyeing

2020 ◽  
Vol 2 (1) ◽  
Author(s):  
Immas Lutfi ◽  
Rois Fatoni ◽  
Siti Fatimah
Keyword(s):  
Calcium Oxide ◽  
Negative Impact ◽  
Ferrous Sulphate ◽  
Optimal Concentration ◽  
Natural Dyes ◽  
Synthetic Dyes ◽  
Color Fastness ◽  
Natural Dyeing ◽  
Long Time

Recently many batik industries owner have switched to using natural dyes because synthetic dyes in the long time have a negative impact on the environment. Natural dyes that are widely used are mahogany (Swietenia Mahagony L.) bark dyes. In the process of coloring batik fabric, there is stage of fixation. Fixation is the stage of binding the color with the fixator. There are three types of fixators used, namely alum (Al2(SO4)3.12H2O), calcium oxide (CaO) and ferrous sulphate (FeSO4) with certain concentrations. The owner of batik industries don't know yet the concentration of a strong and optimal fixator for binding natural dyes in batik fabric. The purpose of this study is to determine the type of strong fixator and optimal concentration of fixator for binding natural mahogany dyes on batik fabric. The owner of batik industries usually use an estimated concentration of 30 g / L to 100 g / L. In this study, the variables are 30 g / L, 60 g / L and 90 g / L in each type of fixator to test the color aging value. and color fastness to rub wet and dry. Judging from the value of R% (color aging) and color fastness test against wet and dry rubbing, it can be concluded that alum and calcium oxide are strong fixators that used with mahogany dyes and the most optimal concentration of alum and calcium oxide is 60 g / L. 

scholarly journals Optimization of conventional and ultrasoundassisted extraction of Paeonia officinalis anthocyanins, as natural alternative for a green technology of cotton dyeing

2021 ◽  
Vol 26 (2) ◽  
pp. 2527-2534
Author(s):  
SIMONA OANCEA ◽  
◽  
MIRABELA PERJU ◽  
DIANA COMAN ◽  
HOREA OLOSUTEAN
Keyword(s):  
Green Technology ◽  
Synthetic Dyes ◽  
Colour Properties ◽  
High Concentration ◽  
Safety Issues ◽  
Solid Ratio ◽  
Conventional Procedure ◽  
Cielab System ◽  
The Impact ◽  
Cotton Dyeing

Plant pigments gained popularity over synthetic dyes because of safety issues regarding the impact on health and environment. The present paper deals with optimization of anthocyanins extraction from Paeonia officinalis L. flowers and their application in cotton eco-dyeing processes. The results on extraction and mathematical models indicate improved extraction by ultrasonication at high solvent/solid ratio (50/1) compared to that by maceration. Among the investigated extraction solvents, the most efficient was 70% ethanol. Cotton dyeing was performed via conventional procedure and ultrasonication, in the presence and absence of classic mordant (copper sulphate) and biomordants (tannic and citric acids). A successful dyeing was obtained according to ATR-FTIR analysis of mordanted dyed samples. The colour properties of dyed cellulosic substrates as determined by CIELAB system showed higher redness values and large positive differences in chroma in samples dyed with peony extract by exhaustion in presence of high concentration of citric acid.

INVERSTIGATION OF RUBIA CORDIFLORIA (INDIAN MADDER) DYE ON SILK FABRIC

2021 ◽  
pp. 59-60
Author(s):  
A.S. Monisha ◽  
G. Parasakthibala
Keyword(s):  
Health Hazard ◽  
Natural Dyes ◽  
Synthetic Dyes ◽  
Silk Fabric ◽  
Fastness Properties ◽  
Huge Amount ◽  
Environmentally Conscious ◽  
Colour Fastness ◽  
The World ◽  
Plant Sources

Synthetic dyes release huge amount of waste and uniform colourants lead to health hazard. It also disturbing the ecobalance of the nature. Natural dyes are mostly derived from plants, invertebrates, or minerals. The most of the natural dyes are vegetable dyes from plant sources-roots, berries, bark, leaves, and wood—and other organic sources such as fungi and lichens. Natural dyes exhibit good biodegradability and are more compatible with the environment. In spite of their inferior fastness, natural dyes are more acceptable to environmentally conscious people around the world. The present study deals with the natural dyes extracted from Rubia Cordifloria. The extracted dye used to dye selected silk fabric and myrobalan mordant used for dye ability, fastness properties, absorbency test. Two shades with different concentration have been developed. Absorbency properties of the dyes extracted from madder and sinking test was determined. The colour fastness through washing and rubbing (Wet and Dry) was an excellent satisfaction in both different concentrations.

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