Hydrogen Peroxide Bleaching of Cationized Cotton Fabric

2019 ◽  
Vol 6 (5) ◽  
pp. 21-29
Author(s):  
Sha Fu ◽  
Matthew J. Farrell ◽  
Mary A. Ankeny ◽  
Edwin T. Turner ◽  
Victoria Rizk
Keyword(s):  
Hydrogen Peroxide ◽  
Statistical Model ◽  
Magnesium Sulfate ◽  
Cotton Fabric ◽  
Significant Loss ◽  
Bleaching Agent ◽  
Color Strength ◽  
Whiteness Index ◽  
Peroxide Bleaching ◽  
Screening Experiment

Hydrogen peroxide (H2O2) is the most commonly used bleaching agent for cotton fabric. However, the conventional H2O2 bleaching formula is not applicable for cationized cotton due to the low whiteness index after bleaching, fabric weakening, and a significant loss of cationic sites. In this work, magnesium sulfate (MgSO4) was added in the H2O2 bleaching formula to stabilize the bleaching system for cationized cotton. Additionally, a screening experiment with temperature and time, and sodium hydroxide (NaOH), H2O2, and MgSO4 concentrations as the factors, and whiteness index, bursting strength, and color strength from dyeing as the responses, was formulated. A statistical model was created using JMP software, which demonstrated how the bleaching conditions influenced the fabric properties. This procedure can be useful for bleaching cationized cotton in production settings.

scholarly journals Degree of cotton fabric whiteness obtained by the fluorescent bleaching agent UVITEX BHT and H2O2

2020 ◽  
Vol 18 (1) ◽  
pp. 57-63
Author(s):  
Milena Miljkovic ◽  
Vojkan Miljkovic ◽  
Dusan Trajkovic ◽  
Sandra Konstantinovic
Keyword(s):  
Hydrogen Peroxide ◽  
Cotton Fabric ◽  
Cotton Fabrics ◽  
Second Phase ◽  
Cotton Wool ◽  
Bleaching Agent ◽  
Color Strength ◽  
Whiteness Index ◽  
The One ◽  
Optical Bleach

In this paper, the influence of the fluorescent bleaching agent, UVITEX BHT optical bleach, on the degree of whiteness of cotton fabric was examined. In the first phase of the test, the bleaching of cotton with hydrogen peroxide, as the bleaching agent, was done. In the second phase, the effect of fluorescent bleaching agent on the whiteness of cotton wool bleached in the first phase was tested. Moreover, the color strength (K/S) and CIE L*a*b* were determined using Coloreye - 3000 spectrophotometer. The whiteness degree achieved with bleaching agent UVITEX BHT was almost twice larger than the one achieved with chemical bleaching compounds. The highest whiteness index (WI) of cotton fabrics was achieved when fluorescent UVITEX BHT bleach was used in the concentration of 0.1%.

scholarly journals Influence of the fluorescent brightener Periblanc BA on the degree of whiteness of the knitted cotton fabric

2011 ◽  
Vol 65 (1) ◽  
pp. 61-66 ◽  
Author(s):  
Milena Miljkovic ◽  
Milovan Purenovic ◽  
Mile Novakovic ◽  
Sonja Randjelovic
Keyword(s):  
Hydrogen Peroxide ◽  
Cotton Fabric ◽  
Whiteness Index ◽  
Fluorescent Brightener ◽  
Single Bath ◽  
Optical Bleaching ◽  
The One ◽  
Experimental Runs ◽  
Exhaustion Method

In this study the influence of the different fluorescent brightener Periblanc BA concentrations on the degree of knitted cotton fabric whiteness was investigated. Two consecutive experimental runs were performed. The first was the bleaching of the knitted cotton fabric with hydrogen peroxide using the methods of two and single bath exhaustion while the second was the optical bleaching with fluorescent brightener Periblanc BA using the exhaustion method. CIE Whiteness Index and Tint value were measured on the Color-Eye 3000 spectrophotometer at the standard illuminant D65 (Ice-Texicon, d/8, D65/10?) while K/S values were determined using the Kubelka Munk equation. The results show that cotton fabric bleached with fluorescent brightener Periblanc BA after bleaching with hydrogen peroxide using two bath exhaustion method has higher degree of whiteness (118.8) with a reddish tint in comparison to the one bleached with hydrogen peroxide using single bath method (106.1).

scholarly journals Changes in Bovine Enamel after Treatment with a 30% Hydrogen Peroxide Bleaching Agent

2004 ◽  
Vol 23 (4) ◽  
pp. 517-521 ◽  
Author(s):  
Hyun-Jin PARK ◽  
Tae-Yub KWON ◽  
Soon-Hyun NAM ◽  
Hyun-Jung KIM ◽  
Kyo-Han KIM ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
Bleaching Agent ◽  
Peroxide Bleaching ◽  
Bovine Enamel

scholarly journals Indirect cytotoxicity of a 35% hydrogen peroxide bleaching gel on cultured odontoblast-like cells

2009 ◽  
Vol 20 (4) ◽  
pp. 267-274 ◽  
Author(s):  
Cármen Regina Coldebella ◽  
Ana Paula Dias Ribeiro ◽  
Nancy Tomoko Sacono ◽  
Flávia Zardo Trindade ◽  
Josimeri Hebling ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
Cell Morphology ◽  
Total Protein ◽  
Cell Metabolism ◽  
Control Group ◽  
Bleaching Agent ◽  
Morphological Alterations ◽  
Peroxide Bleaching ◽  
Cytopathic Effects ◽  
Halogen Light

The aim of this study was to evaluate the trans-enamel and trans-dentinal effects of a 35% hydrogen peroxide (H2O2) bleaching gel on odontoblast-like cells. Enamel/dentin discs obtained from bovine incisors were mounted in artificial pulp chambers (APCs). Three groups were formed: G1- 35% H2O2; G2- 35% H2O2 + halogen light application; G3- control. The treatments were repeated 5 times and the APCs were incubated for 12 h. Then, the extract was collected and applied for 24 h on the cells. Cell metabolism, total protein dosage and cell morphology were evaluated. Cell metabolism decreased by 62.09% and 61.83% in G1 and G2, respectively. The depression of cell metabolism was statistically significant when G1 and G2 were compared to G3. Total protein dosage decreased by 93.13% and 91.80% in G1 and G2, respectively. The cells in G1 and G2 exhibited significant morphological alterations after contact with the extracts. Regardless of halogen light application, the extracts caused significantly more intense cytopathic effects compared to the control group. After 5 consecutive applications of a 35% H2O2 bleaching agent, either catalyzed or not by halogen light, products of gel degradation were capable to diffuse through enamel and dentin causing toxic effects to the cells.

Laccase-mediated system pretreatment to enhance the effect of hydrogen peroxide bleaching of cotton fabric

2012 ◽  
Vol 50 (3) ◽  
pp. 782-787 ◽  
Author(s):  
Liqiang Tian ◽  
C. Branford-White ◽  
Wen Wang ◽  
Huali Nie ◽  
Limin Zhu
Keyword(s):  
Hydrogen Peroxide ◽  
Cotton Fabric ◽  
Peroxide Bleaching

scholarly journals Effect of Scouring and Bleaching Agents on whiteness Index and Bursting Strength of Cotton Knitted Fabric

2019 ◽  
pp. 23-28
Author(s):  
MD. Tofazzal Hossain ◽  
Alimran Hossain ◽  
Palash Kumar Saha ◽  
MD. Zahangir Alam
Keyword(s):  
Hydrogen Peroxide ◽  
Caustic Soda ◽  
Sodium Hypochlorite ◽  
Knitted Fabric ◽  
Bleaching Agent ◽  
Calcium Hypochlorite ◽  
Bleaching Process ◽  
Whiteness Index ◽  
Bursting Strength ◽  
Cotton Knitted Fabric

This paper shows the effect of different bleaching agent on whiteness index and bursting strength of the cotton knitted fabric. Bleaching process uses three types of bleaching agents namely hydrogen peroxide (H2O2), sodium hypochlorite (NaOCl) and calcium hypochlorite Ca(OCl)2 with varying their concentration and these are 1.5 g/l, 2.5 g/l, 3.5 g/l, 4.5 g/l, and 5.5 g/l. In the same time, scouring agent was caustic soda, and its concentration for all the bleaching agents was same. It is obvious that with the increase of bleaching agent concentration, whiteness index increases, and bursting strength reduces.

Effectiveness of In-office Hydrogen Peroxide With Two Different Protocols: A Two-center Randomized Clinical Trial

2018 ◽  
Vol 43 (4) ◽  
pp. 353-361 ◽  
Author(s):  
IEB Martins ◽  
S Onofre ◽  
N Franco ◽  
LM Martins ◽  
A Montenegro ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
Color Change ◽  
Absolute Risk ◽  
Rank Test ◽  
Bleaching Agent ◽  
Tooth Sensitivity ◽  
Peroxide Bleaching ◽  
Color Changes ◽  
Ph Values ◽  
The Absolute

SUMMARY Objectives: The aim of this study was to compare the bleaching efficacy and tooth sensitivity (TS) of a 38% hydrogen peroxide bleaching agent used for in-office bleaching, applied under different time protocols: a 40-minute application or two 20-minute applications. Methods and Materials: Forty-four patients from Brazil and Colombia, with right superior canines darker than C2, were selected for this multicenter, single-blind, randomized trial. The teeth were bleached in two sessions, with a one-week interval between them, in a split-mouth design. The bleaching agent was applied in two 20-minute (2×20) applications or one 40-minute (1×40) application in each session according to the manufacturer's instructions. The color changes were evaluated by using subjective (Vita Classical and Vita Bleachedguide) and objective (Easyshade Spectrophotometer) methods at baseline and 30 days after the second session. Tooth sensitivity was recorded up to 48 hours with a 0-10 visual analog scale. Also, the pH values during the application of bleaching were recorded. Color change in shade guide units and ΔE were analyzed by using the Student t-test (α=0.05). The absolute risk and intensity of TS were evaluated with the McNemar test, the Wilcoxon signed-rank test, and the Friedman test, respectively (α= 0.05). Results: Significant whitening was observed in both groups after 30 days of clinical evaluation. The use of a 40-minute application did not significantly influence the absolute risk of TS (68%, 95% confidence interval [CI] = 53-80) as well as the intensity of TS compared with the acid bleaching gel (absolute risk of 82%, 95% CI = 68-91). The pH values did not differ significantly between groups and at the different assessment periods (p=0.42). Conclusion: The use of a 40-minute in-office bleaching agent gel application produced the same whitening degree and TS that the two 20-minute bleaching agent applications did. The former preferably should be applied because one 40-minute application does not require gel refreshing.

scholarly journals Influence of Time on Bond Strength After Bleaching with 35% Hydrogen Peroxide

2008 ◽  
Vol 9 (2) ◽  
pp. 81-88 ◽  
Author(s):  
Flávia Martão Flório ◽  
Cinthia Maria Barbosa ◽  
Robson Tetsuo Sasaki ◽  
Robera Tarkany Basting
Keyword(s):  
Hydrogen Peroxide ◽  
Bond Strength ◽  
Composite Resin ◽  
Artificial Saliva ◽  
Testing Machine ◽  
Adhesive System ◽  
Bleaching Agent ◽  
Peroxide Bleaching ◽  
Bleaching Treatment

Abstract Aim The aim of this in vitro study was to evaluate the influence of time after treatment with a 35% hydrogen peroxide bleaching agent on the shear bond strength between composite resin and sound enamel and dentin. Methods and Materials Eighty dental slabs - 40 enamel (E) slabs and 40 dentin (D) slabs - were embedded, flatted, and divided into four groups (n=10). In G1 the E and D slabs were kept in artificial saliva for 14 days. For the G2, G3, and G4 groups the E and D slabs were submitted to bleaching treatment with a 35% hydrogen peroxide bleaching agent. At different times after bleaching treatments (G2=immediate; G3=seven days; G4= fourteen days), composite resin cylinders were made using an adhesive system. Tests were performed in a universal testing machine at a speed of 0.5 mm/min to obtain the values in MPa. Results For enamel, the Kruskal-Wallis test and Dunn Method showed G1 differed significantly from G2 (G1=13.40 a; G2=6.64 b; G3=16.76 a; G4=11.64 ab). For dentin, the analysis of variance (ANOVA) and Tukey tests showed that G1 differed significantly from G2 and G3 (G1=12.11 a; G2=4.97 b; G3=8.67 c; G4=11.86 ac). Conclusion It is recommended adhesive restorative procedures in enamel be delayed for seven days postbleaching treatment with 35% hydrogen peroxide, while restorations in dentin should be delayed for 14 days following bleaching treatment. Citation Barbosa CM, Sasaki RT, Flório FM, Basting RT. Influence of Time on Bond Strength After Bleaching with 35% Hydrogen Peroxide. J Contemp Dent Pract 2008 February;(9)2:081-088.

Sign in / Sign up

Export Citation Format

Share Document