Open Access Short communication

The Effect of Imidazolium-Based Ionic Liquids on the Tensile Properties of Gellan Gum/KCF Biocomposite Films - A Prelude Study

Ahmad Adlie Shamsuri, Khalina Abdan, Tatsuo Kaneko

Asian Journal of Physical and Chemical Sciences, Page 1-10
DOI: 10.9734/ajopacs/2021/v9i130126

In this prelude study, the gellan gum/kenaf core fiber (KCF) biocomposite films were fabricated with the addition of imidazolium-based ionic liquids such as 1-butyl-3-methylimidazolium chloride (Bmim Cl), 1,3-dimethylimidazolium methylsulphate (Dmim MeSO4), 1-ethyl-3-methylimidazolium acetate (Emim Ac), and 1-ethyl-3-methylimidazolium trifluoromethanesulfonate (Emim OTf). The fabrication of the biocomposite films was carried out by mixing KCF and the ionic liquids in an aqueous solution, followed by dissolution of gellan gum in the same solution at a temperature of 90°C. The mixed solution was gelled at room temperature, and the formed gel was dried in an oven at 40°C for 48 hours to obtain a freestanding biocomposite film. The fabricated films were characterized by using a universal testing machine to acquire tensile properties. The tensile test results indicated that the biocomposite film added with Emim Ac possesses a higher tensile extension at maximum (up to 24%) than the biocomposite film without ionic liquid (added with glycerol). In addition, the biocomposite film added with Emim OTf has a higher tensile modulus at maximum (up to 758%) compared to the biocomposite film without ionic liquid. In conclusion, the tensile properties of the gellan gum/KCF biocomposite films can be improved with the addition of Emim-based ionic liquids with different counter anions.

Open Access Original Research Article

Coating Ag on an Anatase TiO2 Surface and Adsorption on a 3-Aminopropyltrimethoxysilane-Modified Al or Glass Surface

Masayoshi Kaneko

Asian Journal of Physical and Chemical Sciences, Page 11-21
DOI: 10.9734/ajopacs/2021/v9i130127

In this study, Ag–TiO2 was synthesized by reducing AgNO3. AgNO3 and anatase TiO2 nanoparticles (NPs) were boiled with sodium citrate, resulting in the reduction of Ag. Ag was used to coat the anatase TiO2 NP surfaces. At this stage, the assembly reaction on the anatase TiO2 surface was incomplete. The acidity with pH 4 or less was subsequently adjusted using dilute HCl. After processing, Ag was distributed over the entire surface of anatase TiO2. Furthermore, the synthesized Ag–TiO2 could be adsorbed on an Al or glass surface using 3-aminopropyltrimethoxysilane. Al plates were used to create a substrate exhibiting surface-enhanced Raman scattering activity, and Raman intensity was measured for pyridine. Ag remained stable on the TiO2 surface for over five months. The proposed method, which is cost effective and simple, can be used to prepare materials for studying the environment and so on.

Open Access Original Research Article

Influence of Functional Groups on the Photophysical Properties of 1-(4-Methylsulfonyl Phenyl)-3-(4-n, n Dimethyl (amino Phenyl)-2-Propen-1-One Chalcone as Laser Dye

M. F. Attia, Abdelrahman A. Elbadawi, K. H. Ibnaouf, A. O. Elzupir

Asian Journal of Physical and Chemical Sciences, Page 22-29
DOI: 10.9734/ajopacs/2021/v9i130128

In this work, 1-(4-methylsulfonyl phenyl)-3-(4-N, N dimethyl amino phenyl)-2-propen-1-one (MSPPP) chalcone was synthesized and examined as optical materials. The absorption and fluorescence characteristics of MSPPP chalcone were recorded in ten different solvents. The influence of functional groups (FG) and solvents on their photophysical properties were investigated. These include absorption, fluorescence, stokes shift, and amplified spontaneous emission (ASE). The absorption spectra of MSPPP showed a wavelength band in the range 404 - 427 nm, whereas the fluorescence spectra exhibited a band at 473 - 533 nm. The FGs and solvents had an adorable effect on the optical properties of the synthesized materials. ASE was observed under pump pulse laser excitation, and the wavelengths were attuned from 511 to 548 nm.

Open Access Original Research Article

Non-linear Stability in Transitional and Rotatory Regime of the Cooking of Gari, Food Based on Cassava Tubers

Vodounnou Edmond Claude, Djossou Ayihaou Armand, Semassou Guy Clarence, Degan Gérard

Asian Journal of Physical and Chemical Sciences, Page 30-39
DOI: 10.9734/ajopacs/2021/v9i130129

The present study focuses on the non-linear stability in the transient rotary regime of the cooking process of gari. The process of cooking gari consists of a rotating rectangular cavity filled with grated cassava flour, pressed, retted and considered to be an anisotropic porous medium in a permeably saturated viscoelastic fluid. The cavity is heated from below to a constant temperature. The lower wall of the cavity is impermeable and the upper wall is permeable. Using a numerical method, we have established the transient expressions of the Nusselt number, the flow and temperature fields as a function of the anisotropy parameters of the porous medium and of the Taylor number. The results obtained showed that the anisotropy of the porous medium and the Taylor number greatly influenced the cooking of gari over time.

Open Access Original Research Article

Waste Tire Pyrolysis Product: An Alternative to Petrochemical Feedstock

Christian C. Egwuonwu, Rosemary U. Arinze, Paul C. Agbata, Vera C. Ike

Asian Journal of Physical and Chemical Sciences, Page 40-50
DOI: 10.9734/ajopacs/2021/v9i130130

Aim: The amount of waste tire generated constantly in the modern society is on a rapid increase due to the world’s urbanization, industrialization and population increase. This research was conducted to recover useful products from waste tyre and harness the possibility of using these products as a petrochemical feedstock alternative.

Study Design: Conventional pyrolysis was used to produce bio char, bio-oil and bio-gas

Place and Duration of Study: The research was carried out in the department of Pure and Industrial Chemistry and Mechanical Engineering Nnamdi Azikiwe University between January 2020 and march 2020

Methodology: Waste tyre was pyrolyzed using a conventional pyrolysis over three different temperature 400,550 and 750oC. The yield of the oil and char was determined by weight measurement, while that of gas was determined by mass balancing. The oil produced was characterized using GC/MS (gas chromatography/mass spectrometry)

Results: The percentage yield of char, oil and gas at 400oC, 550oC and 750oC respectively are 62, 24, 14; 48, 36.2, 15.8 and 42, 40, 18. The statistical analysis of yield gave a p-value of 0.785211 this showed that there is no significant change across the three samples statistically. The GC/MS analyses of the oil showed that the oil contains more than 35 compounds of which 6 accounted for more than 50% of the oil, these six include d-limonene with 12.83%, 1-2- benzene dicarboxylic acid with 10.48%, benzene, 1-ethyl-3methyl with 8.89%, benzene 1-methyl-3-(1-methylethyl) with 8.6%, benzene 1-ethenyl-4-methyl with 6.13% and hexadecenoic acid at 5.27%,while another six accounted for less than 5% of the oil, they includes (1-methylenebut-2-enyl)benzene with 0.89%, 1-methylbut-1,3-dienyl)benzene with 0.71%, naphthalene-2,7-dimethyl with 0.71%, quinoline with 0.96%, Spiro[4,5]dec-7-ene,1,8-dimethyl-4-(1-methylethenyl) with 0.74%, phenol 4-(1,1,3,3-tetramethylbutyl).

Conclusion: The composition of tire derived oil are very important petrochemicals derivatives which can be separated or can be used as feedstocks for petrochemical industries.