@article { author = {Parimalam, M. and Islam, M. R. and Yunus, R. and Rashidi, N.M.}, title = {Effects of Colloidal Nanosilica on Epoxy-based Nanocomposite Coatings}, journal = {Progress in Color, Colorants and Coatings}, volume = {12}, number = {2}, pages = {71-82}, year = {2019}, publisher = {Institute for Color Science and Technology (ICST)}, issn = {2008-2134}, eissn = {2383-1790}, doi = {10.30509/pccc.2019.81542}, abstract = {Epoxy-based nanocomposites were fabricated with different content of colloidal silica nanoparticles such as 10.0, 20.0 and 30.0 wt %, through solution casting. The covalent bonding interfaces, resulting from a ring-opening reaction between silica nanoparticles and epoxy matrix were confirmed by the Fourier transform (FT-IR) infrared spectroscopy. These nanocomposites were characterized for thermal stability, glass transition temperature and adhesive properties using thermogravimetric analyzer (TGA), differential scanning calorimeter (DSC) and cross-cut tape test. In addition, chemical resistance was assessed by immersing the films in different chemical solution (acid, alkali and salt solution) for 21 days. It was found that the properties of the nanocomposites were increased proportionally to the content of silica nanoparticles up to a certain amount of loading. After that the properties were decreased. The surface morphology of the nanocomposites was observed by scanning electron microscopy (SEM), which showed that the silica nanoparticles distributed uniformly. In addition, the nanocomposites were studied on UV radiation absorption by UV-Vis spectrophotometer. Excellent UV radiation was noticed by the nanocomposite films. The oxygen transmission rate (OTR) and water contact angle (WCA) testing of the nanocomposite films was also impressive.}, keywords = {Adhesives,barrier,blending,coating,composites}, url = {https://pccc.icrc.ac.ir/article_81542.html}, eprint = {https://pccc.icrc.ac.ir/article_81542_f0916c2274d8e91ffedd1ef93d72ace5.pdf} } @article { author = {Haratian Nezhad, E. and Haratizadeh, H. and Mohammad Kari, B.}, title = {Influence of Thickness and Number of Silver Layers in the Electrical and Optical Properties of ZnO/Ag/ZnO/Ag/ZnO ultra-Thin Films Deposited on the Glass for Low-Emissivity Applications}, journal = {Progress in Color, Colorants and Coatings}, volume = {12}, number = {2}, pages = {83-91}, year = {2019}, publisher = {Institute for Color Science and Technology (ICST)}, issn = {2008-2134}, eissn = {2383-1790}, doi = {10.30509/pccc.2019.81543}, abstract = {We report on transparent ZnO/Ag/ZnO and ZnO/Ag/ZnO/Ag/ZnO thin-films were deposited on the glass substrate by RF and DC sputtering for ZnO and Ag targets, respectively. The electrical and optical properties of the single and double Low Emissivity coatings were investigated with respect to the deposition time of Ag mid layer. The visible transmittance remains about 65% for single and 45% for double Low-E coatings as the Ag deposition time increases. Besides, the decrement of sheet resistance makes lower thermal emissivity of the coatings. In agreement with the optical performance, lower thermal emissivity can strongly increase NIR reflectance as the Ag layer thickness increases. The carrier concentration increases gradually as the sheet resistance decreases and the increase of the free carriers and conductivity of the coatings lead to a sharp rise of the NIR reflectance. The results show that the characteristics of Low-E coatings depend on both the continuity of the metal layer and the metal thickness.}, keywords = {ZnO,Ag,Low-E,Thermal emissivity,NIR reflectance}, url = {https://pccc.icrc.ac.ir/article_81543.html}, eprint = {https://pccc.icrc.ac.ir/article_81543_df5a75093f05c1f5fdd6a6ad383d68f4.pdf} } @article { author = {Al-kawaz, A. and Hadi, N. and Al-husainy, Z.}, title = {Studying a New Infrared Reflective Polymer Coating}, journal = {Progress in Color, Colorants and Coatings}, volume = {12}, number = {2}, pages = {93-99}, year = {2019}, publisher = {Institute for Color Science and Technology (ICST)}, issn = {2008-2134}, eissn = {2383-1790}, doi = {10.30509/pccc.2019.81544}, abstract = {Although, that the solar energy is important for life continuity, there is need to protect large buildings from these radiations in summer and if the buildings are permitted to take these radiations, the cost of cooling will be too much. One of the most effective methods used to solve this problem is to coat buildings with specific pigments that reflect the solar infrared radiation. This work studies a new infrared reflective coating containing carotene pigment. UV-Vis spectroscopy results for the films with different concentrations of carotene pigment showed that the reflectance of IR spectrum reaches to 92% while the reflectance in the visible range (400-500 nm) was decreased to 42% by increasing the concentration. The FT-IR results showed the bonds of the Polymethylmethacrylate (PMMA) and pigment, noted that the transmittance increased for PMMA and pigment almost 10% as compared with pure PMMA. The  containing PMMA, indicating that the transmittance increased almost 10% for pigment-containing PMMA. The results confirmed that the prepared coatings could reflect UV-Vis spectrum. So, they can be used in the protecting the planet from this type of radiation.}, keywords = {pigment,PMMA,reflectance,IR spectrum,carotene shield}, url = {https://pccc.icrc.ac.ir/article_81544.html}, eprint = {https://pccc.icrc.ac.ir/article_81544_ec6112799933a774b826dd5bb1c94d4b.pdf} } @article { author = {Ataeefard, M.}, title = {Study of PLA Printability with Flexography Ink: Comparison with Common Packaging Polymer}, journal = {Progress in Color, Colorants and Coatings}, volume = {12}, number = {2}, pages = {101-105}, year = {2019}, publisher = {Institute for Color Science and Technology (ICST)}, issn = {2008-2134}, eissn = {2383-1790}, doi = {10.30509/pccc.2019.81545}, abstract = {Today, the economic consumption of biodegradable polymers is of capital importance in many applications. One of the most commonly used biopolymers is polylactic acid (PLA). The printability of the biodegradable film has not been fully investigated. This work tested the printability of polylactic acid (PLA) films and compared the print qualities to common packaging films like low density polyethylene (LDPE), corona treated LDPE, polyethylene terephthalate (PET). Solvent -based flexo ink was applied to test the printability of the films. The surface tension of films and densitometry of printed samples were evaluated. Also the inks adhesion to the substrate as an essential parameters that influence the quality of printed samples were measured. It has been found that the PLA can be successfully printed with flexographic solvent inks and could achieve similar quality to common packaging films.}, keywords = {biodegradable films,flexographic printing,Print quality,polylactic acid}, url = {https://pccc.icrc.ac.ir/article_81545.html}, eprint = {https://pccc.icrc.ac.ir/article_81545_7e31d55f8903d544a7816ee1b86d220d.pdf} } @article { author = {Ashtiani Abdi, A. and Nourmohammadian, F. and Mohammadi, Y. and Saeb, M. R.}, title = {Add-on for High Throughput Screening in Material Discovery for Organic Electronics: “Tagging” Molecules to Address the Device Considerations}, journal = {Progress in Color, Colorants and Coatings}, volume = {12}, number = {2}, pages = {107-120}, year = {2019}, publisher = {Institute for Color Science and Technology (ICST)}, issn = {2008-2134}, eissn = {2383-1790}, doi = {10.30509/pccc.2019.81547}, abstract = {This work reflects the worth of intelligent modeling in controlling the nanostructure morphology in manufacturing organic bulk heterojunction (BHJ) solar cells. It suggests the idea of screening the pool of material design possibilities inspired by machine learning. To fulfill this goal, a set of experimental data on a BHJ solar cell with a donor structure of diketopyrrolopyrrole (DDP) and backbone of benzothiadiazole (BT) are fed into a home-written artificial neural network (ANN)/genetic algorithm (GA) hybrid code to optimize film-casting parameters. The annealing temperature, spin coating spin rate, and donor/acceptor ratio taken from available literature are applied to give the machine chance of learning trends in the power conversion efficiency (PCE). DPP-BT structures virtually born in the mind of machine are then screened for resemblance survey to receive a tag of desired characteristic. The results enable device manufacturers to identify the sensitivity of designed molecules to specific film casting conditions, while homologous structures may result in similar responses against design variables.}, keywords = {Organic electronics,Bulk heterojunction solar cell,Machine learning,Artificial intelligence,Molecule tagging}, url = {https://pccc.icrc.ac.ir/article_81547.html}, eprint = {https://pccc.icrc.ac.ir/article_81547_70869e90e5997cfecd0d89f5006c3508.pdf} } @article { author = {Uzoh, C.F. and Onukwuli, O.D. and Nwabueze, A. C.}, title = {The Effect of Gmelina Seed Oil on the Synthesis of Alkyd Resins}, journal = {Progress in Color, Colorants and Coatings}, volume = {12}, number = {2}, pages = {121-132}, year = {2019}, publisher = {Institute for Color Science and Technology (ICST)}, issn = {2008-2134}, eissn = {2383-1790}, doi = {10.30509/pccc.2019.81550}, abstract = {The usage of edible oils for alkyd resin synthesis has lately been of great concern because they can alter the food chain. Research is on the forefront on the oils that are considerably available and do not compete with food sources. Thus, the viability of preparing alkyd resin from inedible, non-drying gmelina seed oil (GSO) was investigated. The physico-chemical properties (viscosity, iodine value, specific gravity, refractive index and acid value) of the GSO were determined and then, it was neutralized, epoxidized, hydroxylated and dehydrated. The fatty acid profiles of the raw oil were determined with GC-MS. The structure of raw GSO, chemically modified GSO and their alkyds were determined using FT-IR spectrometry. Medium GSO length modified alkyd resin was produced via a two stage alcoholysis-esterification method using glycerol, maleic and phthalic anhydride. GC-MS result confirmed that GSO is predominantly saturated, while the FT-IR result confirmed the desaturation and esterification of GSO. Using nano-ZnO pigment, a through dry time of about 8 hrs was obtained with GSO modified alkyd resin C. The alkyds C and D show excellent mechanical properties; H passed and 2H passed for scratch hardness test, good for adhesion test and passed for impact test. Further comparison revealed that Alkyds A and C showed robust resistant to varying chemical medium in comparison with standard alkyd resin. }, keywords = {Gmelina seed oil,Alkyd resin,chemical resistant,desaturation,GC-MS,Through dry time}, url = {https://pccc.icrc.ac.ir/article_81550.html}, eprint = {https://pccc.icrc.ac.ir/article_81550_4822965a21db0fadd69d68f47262a320.pdf} }