Binders development

Broggini M, Marchini S, Fontana E, Moneta D, Fowst C, Geroni C. (2004) Brostallicin A new concept in minor groove DNA binder development. Anti-Cancer Drugs 15 1-6. 

A binder developed at DuPont called Ludox SK [8,10] avoids the need for pH adjustments in order to maintain slurry stability. The product is based on aluminate modified colloidal silica. The aluminated product is deionized and because the alumina sites provide sufficient charge density the product is stable. Deionization to remove sodium hydroxide results in a pH which is acidic. As long as the pH remains above about 3, there is little danger of the alumina being leached from the product surface. 

Magnesium oxyacetate binder may be produced by combining calcined magnesia with magnesium acetate [Mg(CH3.COO)2] (Harmuth et al., 1998). The setting characteristics of the binder are similar to those of the magnesium oxysulfate cement. The binder develops considerable strength. The nature of the reaction products has not yet been studied. 

Table 7.1 shows a number of excellent binders developed to date. Binders properties include - besides the actual binding - flexibility when used for electrodes, insolubility in the electrolyte, compactness, chemical and electrochemical stability, and easy application to electrode paints. The binder should be able to satisfy all of these properties simultaneously. This is a difficult task, and only two binders that comply with all these requisites have been found polyvinylidene fluoride (PVDF) and styrene-butadiene copolymer (SBR). 

Table 7.2 Binders developed by Zeon Corporation. Reproduced by permission of CMC Publishing Co. Ltd...

We do not know how battery manufacturers actually produce electrode paints. The utilization method of the BM-400B binder developed by Zeon Corporation is described next. 

The novel binder developed sti ength at a slower rate tlian ordinary Portland cement, so sufficient time must be allowed for the setting and curing. 

Noncommercial cellulose triacetate (300AC-20 Macherey-Nagel, Germany) plates with sodium carboxymethylcellulose (1.18 mg/g Carl Schleicher and Schuell, Germany) as binder. Development time 90 min migration distance 13.5 cm. 

Noncommercial microcrystalline cellulose triacetate plates with sodium carboxymethylcellulose as binder (development time 150 min migration distance 10.7 cm). 

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