Topic
Sodium hypophosphite
About: Sodium hypophosphite is a research topic. Over the lifetime, 1695 publications have been published within this topic receiving 15932 citations.
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TL;DR: The treated cotton fabrics showed good water absorption properties along with reasonable antibacterial effectiveness, and the central composite design was used for statistical modelling, evaluated effective parameters and created optimum conditions.
66 citations
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05 Oct 1970
TL;DR: In this article, a uniform, continuous corrosion resistant bonded copper coating on a zinc or zinc alloy body is produced by a process which comprises contacting the zinc body with an electroless copper plating composition or solution consisting essentially of a soluble copper salt, e.g., copper sulfate, a complexing agent, and a reducing agent, such as sodium hypophosphite.
Abstract: Production of a uniform, continuous corrosion resistant bonded copper coating on a zinc or zinc alloy body, by a process which comprises contacting the zinc or zinc alloy body with an electroless copper plating composition or solution consisting essentially of a soluble copper salt, e.g., copper sulfate, a complexing agent, e.g., citric acid, and a reducing agent, e.g., sodium hypophosphite. The resulting zinc or zinc alloy body can then be contacted with a copper electroplating bath, and according to one embodiment the resulting copper plated zinc or zinc alloy body is then treated in a nickel electroplating solution, followed by treatment in a chromic acid electroplating solution, to provide a corrosion resistant bright attractive metal coating on the zinc or zinc alloy body. The above noted novel electroless copper plating composition, and the zinc or zinc alloy article coated with an electroless copper plating.
66 citations
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TL;DR: In this article, a polycarboxylic acid esterifies cotton cellulose by first forming a five-membered cyclic anhydride as a reactive intermediate, and the esterification takes place at relatively low temperatures (≥130 °C).
Abstract: Durable press finishing agents used to produce wrinkle-resistant cotton garments are cross-linking agents for cotton cellulose. Polycarboxylic acids have been the promising durable press finishing agents to replace the formaldehyde-based reagents when sodium hypophosphite (NaH2PO2) was used as the catalyst. In our previous research, we found that a polycarboxylic acid esterifies cotton cellulose by first forming a five-membered cyclic anhydride as a reactive intermediate. Maleic acid (MA) is a bifunctional carboxylic acid, therefore is not able to form the second cyclic anhydride intermediate once it forms the first ester linkage with cotton. However, we discovered that MA imparted wrinkle resistance to cotton fabrics when NaH2PO2 was present, thus indicating that MA was able to cross-link cotton. Sodium hypophosphite functions as the catalyst for the esterification of cellulose by MA, and the esterification takes place at relatively low temperatures (≥130 °C). Esterification of MA forms single esterlinka...
64 citations
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TL;DR: In this paper, an electroless plating technique was used to fabricate nickel-ceramic composite membranes, and an inexpensive ceramic membrane precursor formulation was reported to yield a membrane support with an average pore size of 275nm.
64 citations
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TL;DR: In this paper, the feasibility of entrapment of organic molecules within a metal was proved and it was shown that the entrapments are within cages and narrow pores formed by Ag crystallites which aggregate into bulk powder of low porosity.
Abstract: We proved the feasibility of entrapment of organic molecules within a metal. Specifically, Congo red, Safranin-O, and thionine were entrapped in metallic silver, obtained through the aqueous reduction of silver cations with sodium hypophosphite. Not only were these water-soluble molecules entrapped, but so was the hydrophobic Sudan III by solubilizing it with sodium dodecyl sulfate. It was proven that the molecules remain intact by the entrapment procedure and that the entrapment is within cages and narrow pores formed by Ag crystallites which aggregate into bulk powder of low porosity. Furthermore, it was proven that a population of nonleachable entrapped molecules is accessible to reaction with external reagents which diffuse inside through the metal pore network.
63 citations