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Somil C. Mehta - One of the best experts on this subject based on the ideXlab platform.

  • variation in Emulsion stabilization behavior of hybrid Silicone polymers with change in molecular structure phase diagram study
    Journal of Colloid and Interface Science, 2009
    Co-Authors: Somil C. Mehta, Ponisseril Somasundaran, Ravi Kulkarni
    Abstract:

    Abstract Silicone oils are widely used in cosmetics and personal care applications to improve softness and condition skin and hair. Being insoluble in water and most hydrocarbons, a common mode of delivering them is in the form of Emulsions. Currently most applications use polyoxyethylene (non-ionic) modified siloxanes as emulsifiers to stabilize Silicone oil Emulsions. However, ionically grafted Silicone polymers have not received much attention. Ionic Silicones have significantly different properties than the non-ionic counterpart. Thus considerable potential exists to formulate Emulsions of Silicones with different water/Silicone oil ratios for novel applications. In order to understand the mechanisms underlying the effects of hydrophilic modifications on the ability of hybrid Silicone polymers to stabilize various Emulsions, this article focuses on the phase diagram studies for Silicone Emulsions. The emulsifying ability of functional Silicones was seen to depend on a number of factors including hydrophilicity of the polymer, nature of the functional groups, the extent of modification, and the method of emulsification. It was observed that the region of stable Emulsion in a phase diagram expanded with increase in shear rate. At a given shear rate, the region of stable Emulsion and the nature of Emulsion (water-in-oil or oil-in-water) was observed to depend on hydrophilic–hydrophobic balance of the hybrid Silicone emulsifier. At a fixed amount of modification, the non-ionically modified Silicone stabilized an oil-in-water Emulsion, whereas the ionic Silicones stabilized inverse water-in-oil Emulsions. This was attributed to the greater hydrophilicity of the polyoxyethylene modified Silicones than the ionic counterparts. In general, it is postulated that with progressive increase in hydrophilicity of hybrid Silicone emulsifiers, their tendency to stabilize water-in-oil Emulsion decreases with corresponding increase in oil-in-water Emulsion. Further, this behavior is hypothesized to depend on the nature of modifying functional groups. Thus a hybrid Silicone polymer can be tailored by selecting the nature and degree of hydrophilicity to obtain a desired Silicone Emulsion.

  • Variation in Emulsion stabilization behavior of hybrid Silicone polymers with change in molecular structure: Phase diagram study
    Journal of Colloid and Interface Science, 2009
    Co-Authors: Somil C. Mehta, Ponisseril Somasundaran, Ravi Kulkarni
    Abstract:

    Silicone oils are widely used in cosmetics and personal care applications to improve softness and condition skin and hair. Being insoluble in water and most hydrocarbons, a common mode of delivering them is in the form of Emulsions. Currently most applications use polyoxyethylene (non-ionic) modified siloxanes as emulsifiers to stabilize Silicone oil Emulsions. However, ionically grafted Silicone polymers have not received much attention. Ionic Silicones have significantly different properties than the non-ionic counterpart. Thus considerable potential exists to formulate Emulsions of Silicones with different water/Silicone oil ratios for novel applications. In order to understand the mechanisms underlying the effects of hydrophilic modifications on the ability of hybrid Silicone polymers to stabilize various Emulsions, this article focuses on the phase diagram studies for Silicone Emulsions. The emulsifying ability of functional Silicones was seen to depend on a number of factors including hydrophilicity of the polymer, nature of the functional groups, the extent of modification, and the method of emulsification. It was observed that the region of stable Emulsion in a phase diagram expanded with increase in shear rate. At a given shear rate, the region of stable Emulsion and the nature of Emulsion (water-in-oil or oil-in-water) was observed to depend on hydrophilic-hydrophobic balance of the hybrid Silicone emulsifier. At a fixed amount of modification, the non-ionically modified Silicone stabilized an oil-in-water Emulsion, whereas the ionic Silicones stabilized inverse water-in-oil Emulsions. This was attributed to the greater hydrophilicity of the polyoxyethylene modified Silicones than the ionic counterparts. In general, it is postulated that with progressive increase in hydrophilicity of hybrid Silicone emulsifiers, their tendency to stabilize water-in-oil Emulsion decreases with corresponding increase in oil-in-water Emulsion. Further, this behavior is hypothesized to depend on the nature of modifying functional groups. Thus a hybrid Silicone polymer can be tailored by selecting the nature and degree of hydrophilicity to obtain a desired Silicone Emulsion. © 2009 Elsevier Inc. All rights reserved.

  • Silicone Emulsions
    Advances in Colloid and Interface Science, 2006
    Co-Authors: Ponisseril Somasundaran, Somil C. Mehta, Parag Purohit
    Abstract:

    Silicone polymers are a class of hybrid organic/inorganic polymers, that show desirable surface properties such as low surface energy and high flexibility, which enables even a very high molecular weight chain to achieve optimal orientation at the interface. They have excellent physical properties such as water repellency, heat stability, and high resistance to chemical and UV attack. Silicone polymers have dual characteristics, because of which they can either be used as emulsifiers or act as the continuous/dispersed phase of the Emulsion. The results of an anionically modified Silicone polymer indicate that it can stabilize an Emulsion of water in cyclic Silicone oil (D5) only in a narrow range of compositions around 80% water and 20% oil, formulated at low shear rates. A Silicone Emulsion stabilized by hydrocarbon emulsifiers shows drastic changes in their electrokinetic and optical properties under external perturbations, for example pH change. Advanced analytical tools such as atomic force microscopy (AFM) illustrated that a coating of Silicone Emulsion causes a solid substrate like fabric to smoothen out. This article further discusses the various types of Silicone Emulsions and their applications. © 2006 Elsevier B.V. All rights reserved.

Ravi Kulkarni - One of the best experts on this subject based on the ideXlab platform.

  • variation in Emulsion stabilization behavior of hybrid Silicone polymers with change in molecular structure phase diagram study
    Journal of Colloid and Interface Science, 2009
    Co-Authors: Somil C. Mehta, Ponisseril Somasundaran, Ravi Kulkarni
    Abstract:

    Abstract Silicone oils are widely used in cosmetics and personal care applications to improve softness and condition skin and hair. Being insoluble in water and most hydrocarbons, a common mode of delivering them is in the form of Emulsions. Currently most applications use polyoxyethylene (non-ionic) modified siloxanes as emulsifiers to stabilize Silicone oil Emulsions. However, ionically grafted Silicone polymers have not received much attention. Ionic Silicones have significantly different properties than the non-ionic counterpart. Thus considerable potential exists to formulate Emulsions of Silicones with different water/Silicone oil ratios for novel applications. In order to understand the mechanisms underlying the effects of hydrophilic modifications on the ability of hybrid Silicone polymers to stabilize various Emulsions, this article focuses on the phase diagram studies for Silicone Emulsions. The emulsifying ability of functional Silicones was seen to depend on a number of factors including hydrophilicity of the polymer, nature of the functional groups, the extent of modification, and the method of emulsification. It was observed that the region of stable Emulsion in a phase diagram expanded with increase in shear rate. At a given shear rate, the region of stable Emulsion and the nature of Emulsion (water-in-oil or oil-in-water) was observed to depend on hydrophilic–hydrophobic balance of the hybrid Silicone emulsifier. At a fixed amount of modification, the non-ionically modified Silicone stabilized an oil-in-water Emulsion, whereas the ionic Silicones stabilized inverse water-in-oil Emulsions. This was attributed to the greater hydrophilicity of the polyoxyethylene modified Silicones than the ionic counterparts. In general, it is postulated that with progressive increase in hydrophilicity of hybrid Silicone emulsifiers, their tendency to stabilize water-in-oil Emulsion decreases with corresponding increase in oil-in-water Emulsion. Further, this behavior is hypothesized to depend on the nature of modifying functional groups. Thus a hybrid Silicone polymer can be tailored by selecting the nature and degree of hydrophilicity to obtain a desired Silicone Emulsion.

  • Variation in Emulsion stabilization behavior of hybrid Silicone polymers with change in molecular structure: Phase diagram study
    Journal of Colloid and Interface Science, 2009
    Co-Authors: Somil C. Mehta, Ponisseril Somasundaran, Ravi Kulkarni
    Abstract:

    Silicone oils are widely used in cosmetics and personal care applications to improve softness and condition skin and hair. Being insoluble in water and most hydrocarbons, a common mode of delivering them is in the form of Emulsions. Currently most applications use polyoxyethylene (non-ionic) modified siloxanes as emulsifiers to stabilize Silicone oil Emulsions. However, ionically grafted Silicone polymers have not received much attention. Ionic Silicones have significantly different properties than the non-ionic counterpart. Thus considerable potential exists to formulate Emulsions of Silicones with different water/Silicone oil ratios for novel applications. In order to understand the mechanisms underlying the effects of hydrophilic modifications on the ability of hybrid Silicone polymers to stabilize various Emulsions, this article focuses on the phase diagram studies for Silicone Emulsions. The emulsifying ability of functional Silicones was seen to depend on a number of factors including hydrophilicity of the polymer, nature of the functional groups, the extent of modification, and the method of emulsification. It was observed that the region of stable Emulsion in a phase diagram expanded with increase in shear rate. At a given shear rate, the region of stable Emulsion and the nature of Emulsion (water-in-oil or oil-in-water) was observed to depend on hydrophilic-hydrophobic balance of the hybrid Silicone emulsifier. At a fixed amount of modification, the non-ionically modified Silicone stabilized an oil-in-water Emulsion, whereas the ionic Silicones stabilized inverse water-in-oil Emulsions. This was attributed to the greater hydrophilicity of the polyoxyethylene modified Silicones than the ionic counterparts. In general, it is postulated that with progressive increase in hydrophilicity of hybrid Silicone emulsifiers, their tendency to stabilize water-in-oil Emulsion decreases with corresponding increase in oil-in-water Emulsion. Further, this behavior is hypothesized to depend on the nature of modifying functional groups. Thus a hybrid Silicone polymer can be tailored by selecting the nature and degree of hydrophilicity to obtain a desired Silicone Emulsion. © 2009 Elsevier Inc. All rights reserved.

Ponisseril Somasundaran - One of the best experts on this subject based on the ideXlab platform.

  • variation in Emulsion stabilization behavior of hybrid Silicone polymers with change in molecular structure phase diagram study
    Journal of Colloid and Interface Science, 2009
    Co-Authors: Somil C. Mehta, Ponisseril Somasundaran, Ravi Kulkarni
    Abstract:

    Abstract Silicone oils are widely used in cosmetics and personal care applications to improve softness and condition skin and hair. Being insoluble in water and most hydrocarbons, a common mode of delivering them is in the form of Emulsions. Currently most applications use polyoxyethylene (non-ionic) modified siloxanes as emulsifiers to stabilize Silicone oil Emulsions. However, ionically grafted Silicone polymers have not received much attention. Ionic Silicones have significantly different properties than the non-ionic counterpart. Thus considerable potential exists to formulate Emulsions of Silicones with different water/Silicone oil ratios for novel applications. In order to understand the mechanisms underlying the effects of hydrophilic modifications on the ability of hybrid Silicone polymers to stabilize various Emulsions, this article focuses on the phase diagram studies for Silicone Emulsions. The emulsifying ability of functional Silicones was seen to depend on a number of factors including hydrophilicity of the polymer, nature of the functional groups, the extent of modification, and the method of emulsification. It was observed that the region of stable Emulsion in a phase diagram expanded with increase in shear rate. At a given shear rate, the region of stable Emulsion and the nature of Emulsion (water-in-oil or oil-in-water) was observed to depend on hydrophilic–hydrophobic balance of the hybrid Silicone emulsifier. At a fixed amount of modification, the non-ionically modified Silicone stabilized an oil-in-water Emulsion, whereas the ionic Silicones stabilized inverse water-in-oil Emulsions. This was attributed to the greater hydrophilicity of the polyoxyethylene modified Silicones than the ionic counterparts. In general, it is postulated that with progressive increase in hydrophilicity of hybrid Silicone emulsifiers, their tendency to stabilize water-in-oil Emulsion decreases with corresponding increase in oil-in-water Emulsion. Further, this behavior is hypothesized to depend on the nature of modifying functional groups. Thus a hybrid Silicone polymer can be tailored by selecting the nature and degree of hydrophilicity to obtain a desired Silicone Emulsion.

  • Variation in Emulsion stabilization behavior of hybrid Silicone polymers with change in molecular structure: Phase diagram study
    Journal of Colloid and Interface Science, 2009
    Co-Authors: Somil C. Mehta, Ponisseril Somasundaran, Ravi Kulkarni
    Abstract:

    Silicone oils are widely used in cosmetics and personal care applications to improve softness and condition skin and hair. Being insoluble in water and most hydrocarbons, a common mode of delivering them is in the form of Emulsions. Currently most applications use polyoxyethylene (non-ionic) modified siloxanes as emulsifiers to stabilize Silicone oil Emulsions. However, ionically grafted Silicone polymers have not received much attention. Ionic Silicones have significantly different properties than the non-ionic counterpart. Thus considerable potential exists to formulate Emulsions of Silicones with different water/Silicone oil ratios for novel applications. In order to understand the mechanisms underlying the effects of hydrophilic modifications on the ability of hybrid Silicone polymers to stabilize various Emulsions, this article focuses on the phase diagram studies for Silicone Emulsions. The emulsifying ability of functional Silicones was seen to depend on a number of factors including hydrophilicity of the polymer, nature of the functional groups, the extent of modification, and the method of emulsification. It was observed that the region of stable Emulsion in a phase diagram expanded with increase in shear rate. At a given shear rate, the region of stable Emulsion and the nature of Emulsion (water-in-oil or oil-in-water) was observed to depend on hydrophilic-hydrophobic balance of the hybrid Silicone emulsifier. At a fixed amount of modification, the non-ionically modified Silicone stabilized an oil-in-water Emulsion, whereas the ionic Silicones stabilized inverse water-in-oil Emulsions. This was attributed to the greater hydrophilicity of the polyoxyethylene modified Silicones than the ionic counterparts. In general, it is postulated that with progressive increase in hydrophilicity of hybrid Silicone emulsifiers, their tendency to stabilize water-in-oil Emulsion decreases with corresponding increase in oil-in-water Emulsion. Further, this behavior is hypothesized to depend on the nature of modifying functional groups. Thus a hybrid Silicone polymer can be tailored by selecting the nature and degree of hydrophilicity to obtain a desired Silicone Emulsion. © 2009 Elsevier Inc. All rights reserved.

  • Silicone Emulsions
    Advances in Colloid and Interface Science, 2006
    Co-Authors: Ponisseril Somasundaran, Somil C. Mehta, Parag Purohit
    Abstract:

    Silicone polymers are a class of hybrid organic/inorganic polymers, that show desirable surface properties such as low surface energy and high flexibility, which enables even a very high molecular weight chain to achieve optimal orientation at the interface. They have excellent physical properties such as water repellency, heat stability, and high resistance to chemical and UV attack. Silicone polymers have dual characteristics, because of which they can either be used as emulsifiers or act as the continuous/dispersed phase of the Emulsion. The results of an anionically modified Silicone polymer indicate that it can stabilize an Emulsion of water in cyclic Silicone oil (D5) only in a narrow range of compositions around 80% water and 20% oil, formulated at low shear rates. A Silicone Emulsion stabilized by hydrocarbon emulsifiers shows drastic changes in their electrokinetic and optical properties under external perturbations, for example pH change. Advanced analytical tools such as atomic force microscopy (AFM) illustrated that a coating of Silicone Emulsion causes a solid substrate like fabric to smoothen out. This article further discusses the various types of Silicone Emulsions and their applications. © 2006 Elsevier B.V. All rights reserved.

Parag Purohit - One of the best experts on this subject based on the ideXlab platform.

  • Silicone Emulsions
    Advances in Colloid and Interface Science, 2006
    Co-Authors: Ponisseril Somasundaran, Somil C. Mehta, Parag Purohit
    Abstract:

    Silicone polymers are a class of hybrid organic/inorganic polymers, that show desirable surface properties such as low surface energy and high flexibility, which enables even a very high molecular weight chain to achieve optimal orientation at the interface. They have excellent physical properties such as water repellency, heat stability, and high resistance to chemical and UV attack. Silicone polymers have dual characteristics, because of which they can either be used as emulsifiers or act as the continuous/dispersed phase of the Emulsion. The results of an anionically modified Silicone polymer indicate that it can stabilize an Emulsion of water in cyclic Silicone oil (D5) only in a narrow range of compositions around 80% water and 20% oil, formulated at low shear rates. A Silicone Emulsion stabilized by hydrocarbon emulsifiers shows drastic changes in their electrokinetic and optical properties under external perturbations, for example pH change. Advanced analytical tools such as atomic force microscopy (AFM) illustrated that a coating of Silicone Emulsion causes a solid substrate like fabric to smoothen out. This article further discusses the various types of Silicone Emulsions and their applications. © 2006 Elsevier B.V. All rights reserved.

R T Huo - One of the best experts on this subject based on the ideXlab platform.

  • The Study on Preparation and Performance of Surface Treating Agent for PVC Coated Fabric
    Proceedings of the 2010 International Conference on Information Technology and Scientific Management Vols 1-2, 2010
    Co-Authors: L.-y. Chang, R T Huo
    Abstract:

    PVC coated fabric has poor ageing resistance and plasticizer migration problem. The surface treatment can prevent the plasticizer in the PVC from migrating to the surface, and improve the ageing resistance and the service life of the PVC coated fabric. The effects of the thickener, fluorocarbon resin, hydrophobic additive and the Silicone Emulsion in the top finish formulation on the performance of the coated fabric were investigated. The experimental results showed that the contact angles of water droplet on the surface of the treated material were 100.5 degrees and the water droplet could easily roll off the surface. The adhesive property between the top layer and PVC layer was excellent. The ageing resistance and the anti-fouling and self-cleaning performance of the finished material were improved.