Tanvir Arfin; Kamini Sonawane; Arshiya Tarannum
Abstract
Phenol gives a toxic response in the natural water and leads to show harsh effects on human being, plants, and animals. At low concentration, the phenol gives a pungent taste as well as odour to the consumption of water. It is because of such reason that phenol is contained in the environmental legislation, ...
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Phenol gives a toxic response in the natural water and leads to show harsh effects on human being, plants, and animals. At low concentration, the phenol gives a pungent taste as well as odour to the consumption of water. It is because of such reason that phenol is contained in the environmental legislation, and it needs to be analysed for providing better results. Therefore it should be eliminated before discharging or reusing the waste flow to the environment. The current review is mainly focused on the growth related to the detection of phenol in the water. In the review the state, advantages, disadvantages of different techniques are discussed in brief. The methods mainly involve the electrodes which hold the interest for using new material in the form of binders and also to advance the other types of electrodes. It is observed that for the electrochemist, the electrochemistry of electrodes is considered as the most commanding approach. The significant merits of using electrodes are an enhancement of the selectivity for the electroanalytical approach. The preparation methods for the electrodes are simple, secure, versatile, and most commonly, it has many controllable variables which enables it best material used in the starting of various applications. There are different aspects of applications such as industrial technology transfers purposes; it affects the electroanalytical chemistry and diverse other fields as well, namely energy conversion, catalysis, storage, etc. Copyright © VBRI Press.
Deepak Patil; Ajay Vasudeo Rane; K Kanny; Abitha V K; Anagha Sabnis
Abstract
Novel self-repairing Urea-Phenol-Formaldehyde (UPF) microcapsules containing linseed oil were prepared via in-situ polymerization in an oil-in-water emulsion. The main purpose of encapsulation is to control the release of linseed oil, when external conditions such as mechanical stress or energy cause ...
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Novel self-repairing Urea-Phenol-Formaldehyde (UPF) microcapsules containing linseed oil were prepared via in-situ polymerization in an oil-in-water emulsion. The main purpose of encapsulation is to control the release of linseed oil, when external conditions such as mechanical stress or energy cause microcapsules to break. These controlled release mechanisms of linseed oil make them suitable for application in self-healing coatings. Chemical structure analyses of microcapsules were studied by Fourier transform infrared spectroscopy (FTIR), optical microscopy and scanning electron microscopy for their structural & morphological illustrations. Controllable particle sizes were determined under optical microscope and as well using particle size analyzer. To determine the healing efficiency, the microcapsules, were incorporated in the epoxy coatings in varying proportions. The effects of the same on anti-corrosion performance was carried out in 5% NaCl aqueous solution (ASTM B117) and Decreasing trend of pencil hardness, scratch hardness, Impact resistance with the increase in concentration of microcapsules was observed. Chemical resistance could also be attributed to the presence of aromatic structures in epoxy which impart chemical stability. Secondary hydroxyl moiety in epoxy chain forms hydrogen bonding with the metal substrate that would contribute to good adhesive forces. Epoxy coatings incorporated with microcapsules showed better corrosion resistance than neat epoxy coating, where neat epoxy coating showed rust and spreading of rust observed on tested panel. Mechanical properties decreased on incorporating microcapsules into epoxy matrix, hence development of mechanical properties without effecting the corrosion properties shall be studied further.
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