High consistency bleaching by hydrogen peroxide.
نویسندگان
چکیده
منابع مشابه
In-situ Enzymatic Generation of Hydrogen Peroxide for Bleaching Purposes
Bleaching detergent formulations contain environmentally unfriendly bleaching agents (perborates and percarbonates), which cause aquatic eutrophication, although without these compounds detergents are much less efficient for the washing processes. In an effort to replace these compounds, in this study, hydrogen peroxide was generated as a bleaching compound by means of enzymatic reactions. Thre...
متن کاملHydrogen peroxide generation with immobilized glucose oxidase for textile bleaching.
Glucose oxidase was covalently immobilized on commercially available alumina and glass supports, with a high level of protein recovery. The operational stability of the alumina carrier was an advantage over the glass support, though the rate of generation of hydrogen peroxide in the case of the latter was higher. The immobilization technique provided repeated application of the enzyme even in l...
متن کاملMg(OH)2-Based Hydrogen Peroxide Bleaching of Deinked Pulp
Sodium hydroxide (NaOH) has been used as an alkali source in conventional hydrogen peroxide bleaching. In the present work, partial and total replacement of NaOH with magnesium hydroxide (Mg(OH)2) as the alkali source for hydrogen peroxide bleaching of deinked pulp was studied. The bleached pulp was studied with respect to brightness, post color (P.C.) number, and mechanical properties (i.e., t...
متن کاملThe Evaluation of Hydrogen Peroxide Bleaching of Gonometa Postica Silk
Degradasie van Gonometa postica-sy as gevolg van bleiking is nie alleen ’n belangrike probleem vir verbruikers nie, maar ook vir die vervaardiger. Die doel met die navorsing was om die effek van waterstofperoksiedbleiking op G. postica-sy te bepaal. Die spesifieke doelstelling was om die invloed van temperatuur, pH en tydsduur op waterstofperoksiedvrystelling, kleurverskil, breekkrag en styfhei...
متن کاملThe relationship of hydrogen peroxide exposure protocol to bleaching efficacy.
The purpose of this study was to compare two in-office bleaching methods with respect to tooth color change and level of hydrogen peroxide penetration into the pulp cavity and to evaluate relationships between penetration level and color change. Eighty extracted canines were exposed to two different bleaching regimens (conventional vs sealed bleaching technique). After exposure to 38% hydrogen ...
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ژورنال
عنوان ژورنال: JAPAN TAPPI JOURNAL
سال: 1990
ISSN: 0022-815X,1881-1000
DOI: 10.2524/jtappij.44.989