- Interfacial properties of novel surfactants based on maleic and succinic acid for potential application in personal care
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Hemiesters and Hemiamides of maleic and succinic acid viz. sodium lauryl succinate (C12SE), sodium lauryl maleate (C12ME), sodium lauryl succinamide (C12SA), sodium lauryl maleamide (C12MA), sodium hexadecyl succinate (C16SE) and sodium hexadecyl maleate (C16ME) were synthesized and investigated as surfactants in the pure water and aqueous hydrotrope [sodium p-toluene sulfonate (NaPTs)] solution. The chemical structures of the prepared surfactants were established by FTIR and 1H NMR spectroscopy. The surface tension measurements depicted low CMC and a high adsorption efficiency (pC20) which is highly beneficial for creating personal care formulations. The dynamic light scattering (DLS) technique indicated the formation of larger micelles which was important for skin care as larger micelles cannot penetrate the skin layer. Moreover, these surfactants depicted good foamability and stability attributed to faster monomer adsorption and small bubble size which was preferred for cleansing application. Additionally, low protein/lipid solubilization by these surfactants indicated its mild behaviour on skin as compared to other commonly used conventional anionic [sodium lauryl sulfate (SLS)], zwitterionic [cocamidopropyl betaine (CAPB)] and nonionic [decyl glucoside (DG)] surfactants. Viscosity measurements suggested decent thickening ability of surfactants in the presence of co-surfactant like lauramine oxide. Basis of all the properties discussed, these novel hemiesters and hemiamides seem promising as surfactants for improving various characteristics in potential personal care formulations.
- Janni, Devi Sirisha,Rajput, Gajendra,Pandya, Niki,Subramanyam, Gayathri,Varade, Dharmesh
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- Calcium carbonate surface modifier as well as composition of calcium carbonate and modifier and preparation method thereof
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The invention discloses a calcium carbonate surface modifier as well as a composition of calcium carbonate and the modifier and a preparation method thereof. The composition of calcium carbonate and the modifier comprises the following components in percentages by weight: 85-99wt% of calcium carbonate and 1-15wt% of the modifier; the modified calcium carbonate can be filled into polyvinyl chloride, nylon, polypropylene, silicone rubber, polyurethane and epoxy resin; surfaces of calcium carbonate particles are uniformly covered, so that the calcium carbonate particles are well dispersed in matrix; the modifier has an enhancing effect, and can improve quality of products. The modifier can be combined with a calcium carbonate production process, the process is simple to operate and is easy to produce in a large scale. The modifier is a compound with a molecular structure as shown in the specification.
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Paragraph 0077; 0078; 0079
(2016/12/01)
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