scholarly journals An investigation of dyeability of wool fabric with red cabbage (Brassica oleracea L. var.) extract

2017 ◽  
Vol 68 (02) ◽  
pp. 108-115 ◽  
Author(s):  
BENLI HÜSEYIN
Keyword(s):  
Ph Value ◽  
Metal Salts ◽  
Wool Fabric ◽  
Red Cabbage ◽  
Ph Values ◽  
Wool Fabrics ◽  
Color Yield ◽  
Brassica Vegetables ◽  
Dyed Fabrics ◽  
Brassica Oleracea L

In this study, woollen fabrics were dyed with the aqueous extract of fresh red cabbage leaves, containing kaempferol and quercetin as the main colorant species. Brassica vegetables are rich in polyphenols, flavonoids and glucosinolates. The dyeing was carried out with and without metal salts as mordants, such as KAl(SO4)2.12H2O, CuSO4.5H2O, FeSO4.7H2O and K2Cr2O7. Pre-and meta-mordanting methods were used in this study. Mordanted wool fabrics were dyed in a dyebath prepared with different pH values. The pH values of bath were 3, 5, 7, 9 and 11, respectively. Different colors and shades can be obtained within different pH values. The dyed fabrics were evaluated through color measurements and standard wash, perspiration, light and rub fastness tests. The dye absorbed by the fabrics and color properties were measured using a spectrophotometer. The color yield of dyed fabrics is expressed by K/S, and CIELAB (L*, a* and b*) values. The effects of mordant, methods of mordanting and pH value of the dye bath on the color values were studied. Finally, satisfactory results were obtained

Dyeing Properties to Wool Fabrics of Catechu Dye Purified by Micro-Filtration Membrane

2008 ◽  
Vol 12 (1) ◽  
pp. 32-38 ◽  
Author(s):  
Xiuliang Hou ◽  
Li Wei ◽  
Xinlong Zhang ◽  
Huihui Wu ◽  
Qicheng Zhou ◽  
...  
Keyword(s):  
Ph Value ◽  
Wool Fabric ◽  
Color Fastness ◽  
Color Changes ◽  
Ph Values ◽  
Filtration Membrane ◽  
Wool Fabrics ◽  
Characteristic Values ◽  
The Stability ◽  
Different Levels

Catechu liquor, which is deep brown-red in color, was purified with a micro-filtration membrane and the stability of catechu dye to different levels of temperatures and pH were investigated in this paper. The effects of the dyeing conditions on color characteristic values and color fastnesses of the dyed wool fabrics were also investigated. The results show that the liquor of catechu dye is stable at pH values of 3-7 and its color changes to a deeper brown-red when its pH value is above 8. The preferable dyeing conditions for wool fabric with refined powder catechu dye are as follows: dyeing temperature of 100±C, pH value of 6.5 for the dye bath and catechu dye of 1-4% (o.w.f). The dyed wool fabric has good color fastnesses to washing, alkali perspiration and dry rubbing. However, its color fastness rating to wet rubbing is poor, ranging from 2-3. Further research will be needed on this aspect.

Research on microwave pad dyeing process for wool fabric

2017 ◽  
Vol 21 (4) ◽  
pp. 263-275 ◽  
Author(s):  
Xue Zhao
Keyword(s):  
Ph Value ◽  
Wool Fabric ◽  
Process Conditions ◽  
Colour Difference ◽  
Average Deviation ◽  
Sodium Bisulphite ◽  
Content Type ◽  
Dyeing Process ◽  
Wool Fabrics ◽  
Microwave Fixation

Purpose This paper aims to study microwave pad dyeing process for wool fabric. Influences of various dyeing process conditions including galactomannan dosage, urea dosage, sodium bisulphite dosage, pH value, microwave irradiation power, treating time and cold batching time before microwave fixation on K/S values were analysed. The colour yield, fixation and levelness were compared between microwave fixation and cold batching fixation. Design/methodology/approach Colour yield (K/S values) was calculated using a Datacolor SF650 colour measuring and matching instrument (10° standard observer, CIE D65 light source Measuring; Datacolor, USA) and was used to determine the depth of the shade of dyed wool fabrics. Levelness of dyeing was evaluated also using the Datacolor SF650 colour measuring and matching instrument by measuring average deviation (S), range (P) of the maximum and the minimum for lightness (L), chroma (C) and hue (h), and balanced colour difference (ΔE) at 20 specified uniform locations on the wool fabrics. The colour difference was calculated as per the equation ΔE=(ΔL2+Δa2+Δb2)1/2 as appearing in the Experimental section. Fixation was determined using a Datacolor SF650 colour measuring and matching instrument by measuring ratio the of K/S for wool fabrics that were rinsed, washed, neutralised and then dried, and wool fabrics that were dried after fixation without washing. The pH of the padding solution was evaluated using a PHSJ-4A PH meter (Datacolor, USA). SEM analysis was done on JEOL JSM-5600LV machine (JEOL Ltd, Japan). Findings This study is based on application of microwave technology in the processing of silk. Originality/value It was found in laboratory experiments that uniform dyeing and deeper colour can be achieved throughout the microwave pad dyeing process for wool by using galactomannan. The novel process could reduce the dyeing time and the energy consumption of the traditional cold pad-batch dyeing process for wool fabric.

Functionalization of Wool Fabric Using Pineapple Peel Extract (PPE) as a Natural Dye

2019 ◽  
Vol 6 (5) ◽  
pp. 16-20
Author(s):  
Javed Sheikh ◽  
Ashutosh Agrawal ◽  
Harsh Garg ◽  
Aashi Agarwal ◽  
Prasun Mathur
Keyword(s):  
Antioxidant Activity ◽  
Functional Properties ◽  
Wool Fabric ◽  
Fastness Properties ◽  
Color Strength ◽  
Wool Fabrics ◽  
Textile Functionalization ◽  
Pineapple Peel ◽  
Dyed Fabrics ◽  
Peel Extract

Large quantities of pineapple peel waste are discarded every year that can be used for extraction of useful textile functionalization chemicals. In the present work, pineapple peel extract (PPE) was used for simultaneous dyeing and multifunctional finishing of wool fabric. The PPE was used for dyeing wool fabrics, with and without mordants. The dyed fabrics were characterized and evaluated for color values and fastness properties. The functional properties of the dyed fabrics viz. antibacterial activity, UV protection, and antioxidant activity were evaluated. It was confirmed that wool fabric can be dyed using pineapple peel extract without mordants; however, additional color strength can be gained using pre-mordanting. The dyed fabrics showed light shades with good fastness properties along with excellent functional properties.

Flame Retardancy Modification of Wool Fabrics Using a Vinyl Phosphorus Monomer

2012 ◽  
Vol 557-559 ◽  
pp. 952-956
Author(s):  
Fang Jun Zhang ◽  
Jin Ping Guan ◽  
Guo Qiang Chen
Keyword(s):  
Weight Gain ◽  
Flame Retardancy ◽  
Graft Copolymerization ◽  
Oxygen Index ◽  
Ph Value ◽  
Technological Condition ◽  
Wool Fabric ◽  
Limiting Oxygen Index ◽  
Wool Fabrics ◽  
Water Media

In this paper, a flame retardant dimethyl-2-(methacryloyloxyethyl) phosphate (DMMEP) was applied onto wool fabrics by graft copolymerization technique in water media. The paper discussed the technological conditions of the formation of wool-g-DMMEP such as the pH value of reaction, reaction temperature and time etc. The weight gain of wool fabrics was chosen to be the indicator of optimized technological condition. The results showed that DMMEP treated wool fabrics have high limiting oxygen index(LOI). Wool fabric with weight gain 4.27% has high LOI 34.6%, which is hard ignited in air. Char residues of DMMEP treated wool fabrics are more rigid and solid.

The Effect of Mordan Complexation of Natural Pigments on the Dyeing of Wool Dyeing of Natural Pigments

2012 ◽  
Vol 441 ◽  
pp. 92-95 ◽  
Author(s):  
Yun Jiang Sun ◽  
Qing Tao Meng
Keyword(s):  
Ph Value ◽  
Wool Fabric ◽  
Natural Pigment ◽  
Colour Fastness ◽  
Natural Pigments ◽  
Ph Values ◽  
Aluminium Sulfate ◽  
Wool Dyeing ◽  
Mordant Dyeing ◽  
Optimal Ph

The effects of different pH values and temperatures on the dyeing behavior of three types of natural pigment (lac dyer red, gardenia yellow, gardenia blue) on wool fabric was determined. The optimal dyeing temperature was found to be 100degC and the optimal pH value was 4 when using the most suitable mordant, aluminium sulfate. After mordant dyeing the fabric colour fastness basically met the requirements.

scholarly journals Bonding of Selected Hardwoods with PVAc Adhesive

2020 ◽  
Vol 11 (1) ◽  
pp. 67
Author(s):  
Ján Iždinský ◽  
Ladislav Reinprecht ◽  
Ján Sedliačik ◽  
Jozef Kúdela ◽  
Viera Kučerová
Keyword(s):  
Adhesion Strength ◽  
Cold Water ◽  
Ph Value ◽  
Water Extract ◽  
Solid Wood ◽  
Contact Angles ◽  
Water Contact ◽  
Ph Values ◽  
Positive Tendency ◽  
The Impact

The bonding of wood with assembly adhesives is crucial for manufacturing wood composites, such as solid wood panels, glulam, furniture parts, and sport and musical instruments. This work investigates 13 hardwoods—bangkirai, beech, black locust, bubinga, ipé, iroko, maçaranduba, meranti, oak, palisander, sapelli, wengé and zebrano—and analyzes the impact of their selected structural and physical characteristics (e.g., the density, cold water extract, pH value, roughness, and wettability) on the adhesion strength with the polyvinyl acetate (PVAc) adhesive Multibond SK8. The adhesion strength of the bonded hardwoods, determined by the standard EN 205, ranged in the dry state from 9.5 MPa to 17.2 MPa, from 0.6 MPa to 2.6 MPa in the wet state, and from 8.5 MPa to 19.2 MPa in the reconditioned state. The adhesion strength in the dry state of the bonded hardwoods was not influenced by their cold water extracts, pH values, or roughness parallel with the grain. On the contrary, the adhesion strength was significantly with positive tendency influenced by their higher densities, lower roughness parameters perpendicular to the grain, and lower water contact angles.

scholarly journals Microstructure and Properties of Self-Assembly Graphene Microcapsules: Effect of the pH Value

Nanomaterials ◽  
2019 ◽  
Vol 9 (4) ◽  
pp. 587 ◽  
Author(s):  
Yan-Dong Guo ◽  
Jun-Feng Su ◽  
Ru Mu ◽  
Xin-Yu Wang ◽  
Xiao-Long Zhang ◽  
...  
Keyword(s):  
Electron Microscope ◽  
Photoelectron Spectroscopy ◽  
Self Assembly ◽  
Chemical Engineering ◽  
Ph Value ◽  
Liquid Paraffin ◽  
Energy Dispersive Spectrometer ◽  
Core Material ◽  
Microstructure And Properties ◽  
Ph Values

Graphene has attracted attention in the material field of functional microcapsules because of its excellent characteristics. The content and state of graphene in shells are critical for the properties of microcapsules, which are greatly affected by the charge adsorption equilibrium. The aim of this work was to investigate the effect of pH value on the microstructure and properties of self-assembly graphene microcapsules in regard to chemical engineering. Microcapsule samples were prepared containing liquid paraffin by a self-assembly polymerization method with graphene/organic hybrid shells. The morphology, average size and shell thickness parameters were investigated for five microcapsule samples fabricated under pH values of 3, 4, 5, 6 and 7. The existence and state of graphene in dry microcapsule samples were analyzed by using methods of scanning electron microscope (SEM), transmission electron microscope (TEM) and X-ray photoelectron spectroscopy (XPS). Fourier Transform Infrared Spectoscopy (FT-IR) and Energy Dispersive Spectrometer (EDS) were applied to analyze the graphene content in shells. These results proved that graphene had existed in shells and the pH values greatly influenced the graphene deposition on shells. It was found that the microcapsule sample fabricated under pH = 5 experienced the largest graphene deposited on shells with the help of macromolecules entanglement and electrostatic adherence. This microcapsules sample had enhanced thermal stability and larger thermal conductivity because of additional graphene in shells. Nanoindentation tests showed this sample had the capability of deforming resistance under pressure coming from the composite structure of graphene/polymer structure. Moreover, more graphene decreased the penetrability of core material out of microcapsule shells.

Study on Influence of Silicate Morphology Based on pH Value

2012 ◽  
Vol 454 ◽  
pp. 324-328
Author(s):  
Yan He ◽  
Ya Jing Liu ◽  
Yong Lin Cao ◽  
Li Xia Zhou
Keyword(s):  
Silicic Acid ◽  
Ph Value ◽  
Colorimetric Method ◽  
Absorption Spectrometry ◽  
Degree Of Polymerization ◽  
Raw Material ◽  
X Ray Diffraction ◽  
X Ray ◽  
Ph Values ◽  
The Stability

Infra-red absorption spectrometry, X-ray diffraction observations and characterization tests based on silicon molybdenum colorimetric method were used to investigate the optimal pH value controlling the stability of the silicic acid form. The experiment process was done by using sodium silicate as raw material. The results showed that the solution of silicate influenced the polymerization. The active silicic acid solution with a certain degree of polymerization was obtained by controlling the pH values.

scholarly journals Oral pH value predicts the incidence of radiotherapy related caries in nasopharyngeal carcinoma patients

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Zheng Li ◽  
Qiuji Wu ◽  
Xiangyu Meng ◽  
Haijun Yu ◽  
Dazhen Jiang ◽  
...  
Keyword(s):  
Nasopharyngeal Carcinoma ◽  
Radiation Dose ◽  
Protective Factors ◽  
Green Tea ◽  
Cox Regression ◽  
Ph Value ◽  
Dynamic Monitoring ◽  
Tea Consumption ◽  
Ph Values ◽  
Kaplan Meier

AbstractRadiotherapy-related caries is a complication of radiotherapy for nasopharyngeal carcinoma; however, factors influencing the occurrence, accurate prediction of onset, and protective factors of radiotherapy-related caries remain unclear. This study analyzed risk factors, disease predictors, and protective factors for radiotherapy-related caries in nasopharyngeal carcinoma. This prospective study included 138 nasopharyngeal carcinoma patients receiving radical radiotherapy at our hospital during June 2012–December 2016 and were followed up for dental caries. Patients’ clinical data on radiotherapy were collected, dynamic monitoring was performed to assess changes in oral pH values, and a questionnaire survey was administered to collect patients’ lifestyle habits. Time-dependent cox regression trees, event-free Kaplan–Meier curve, Mann–Whitely U test were used to analysis the results. The median follow-up time was 30 (12–60) months. Radiotherapy-related caries occurred in 28 cases (20.3%). Univariate analyses showed that radiotherapy-related caries was associated with patient’s age, oral saliva pH value, green tea consumption, and radiation dose to sublingual glands, but not with the radiation dose to the parotid and submandibular glands. Multivariate analysis showed that oral saliva pH value [hazard ratio (HR) = 0.390, 95% confidence interval = 0.204–0.746] was an independent prognostic factor for radiotherapy-related caries. Patients with oral saliva pH values ≤ 5.3 in the 9th month after radiotherapy represented a significantly higher risks for radiotherapy-related caries (p < 0.001). Green tea consumption was associated with the occurrence of radiotherapy-related caries, and oral saliva pH values could predict the occurrence of radiotherapy-related caries. Limiting radiation doses to sublingual glands can reduce the occurrence of radiotherapy-related caries.

Effect of pH Value on the Synthesis of NiO Nanoparticles and Microstructure of NiO Based Composite Anode

2021 ◽  
Vol 317 ◽  
pp. 447-453
Author(s):  
Noor Hidayah Aniza Zakaria ◽  
Nafisah Osman
Keyword(s):  
Ph Value ◽  
Sol Gel ◽  
Secondary Phase ◽  
Average Diameter ◽  
Morphological Observation ◽  
Nio Nanoparticles ◽  
Composite Anode ◽  
Ph Values ◽  
Particle Size Analyzer ◽  
Nio Nps

NiO nanoparticle was synthesized by a sol-gel method with three different pH values namely pH=1, 7 and 11, and then calcined at temperature of 450 ᵒC. The influence of different pH values on the physical properties of NiO nanoparticles were investigated by a particle size analyzer (PSA), field emission scanning electron microscope (FESEM) and X-ray diffractometer (XRD). Structural analysis confirmed that a cubic structure of NiO nanoparticle was obtained without any secondary phase for NiO powders prepared with pH=1, while the peak of secondary phase (Ni) appeared for NiO powders prepared with pH= 7 and 11. Morphological observation showed that the NiO nanoparticles prepared with pH=7 and 11 tend to form more agglomerates compared to one prepared with pH=1. The average diameter of NiO nanoparticles with pH 1, 7 and 11 were approximately in the range of 19-26 nm, 21-28 nm, and 24-30 nm, respectively. NiO powder that was synthesized with pH=1 was further used to prepare composite anode of NiO Nps-BaCe0.54Zr0.36Y0.1O2.95 (BCZY) powder. Unfortunately a composite of NiO Nps-BaCeO3-BaZrO3 was obtained instead of BCZY and governed by agglomerates with size in the range of 70-300 nm.

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