Browsing by Author "Harrane, Amine"
Now showing 1 - 4 of 4
Results Per Page
Sort Options
- Design, synthesis and thermo‑chemical properties of rosin vinyl imidazolium based compounds as potential advanced biocompatible materialsPublication . Zaoui, Aniss; Mahendra, Vidhura; Mitchell, Geoffrey; Cherifi, Zakaria; Harrane, Amine; Belbachir, MohammedRosin is a natural material extracted from the pine tree that is vastly used as an adhesive in the construction industry. It chemically consists of cyclic carboxylic structure that is known as rosin acids or abietic acid and other isomers. The abietic acid or/and its isomers can structurally be altered to design for different applications. Herein we envisage the potentials of altering the rosin structure to investigate its thermal and physicochemical properties for advanced material applications. In this regard we have utilised the potassium rosinate (rosin soap) also known as the saponified rosin. Saponified rosin is reacted through an anion exchange metathesis process promoted by ultrasound, with either an ionic liquid or a poly(ionic liquid), namely the 3-octyl-1-vinylimidazolium bromide and the poly (3-octyl-1-vinylimidazolium bromide) as a scope to improve thermal and mechanical applications. The structures of these new compounds were determined using fourier transform infrared spectroscopy (FTIR) and Nuclear Magnetic Resonance spectroscopy (NMR). The rosin/ionic liquid based compound found to be a better fitting candidate for advanced material applications, due to significant improvement in the thermal stability compared to the crude rosin (up to 70 °C raise in the thermal degradation) and promising mechanical characters such as elasticity and malleability.
- Green nanocomposites from rosin-limonene copolymer and algerian clayPublication . Derdar, Hodhaifa; Mitchell, Geoffrey; Mahendra, Vidhura; Benachour, Mohamed; Haoue, Sara; Cherifi, Zakaria; Bachari, Khaldoun; Harrane, Amine; Meghabar, RachidGreen nanocomposites from rosin-limonene (Ros-Lim) copolymers based on Algerian organophilic-clay named Maghnite-CTA+ (Mag-CTA+) were prepared by in-situ polymerization using di erent amounts (1, 5 and 10% by weight) of Mag-CTA+ and azobisisobutyronitrile as a catalyst. The Mag-CTA+ is an organophilic montmorillonite silicate clay prepared through a direct exchange process; the clay was modified by ultrasonic-assisted method using cetyltrimethylammonuim bromide in which it used as green nano-filler.The preparation method of nanocomposites was studied in order to determine and improve structural, morphological, mechanical and thermal properties ofsin.The structure and morphology of the obtained nanocomposites(Ros-Lim/Mag-CTA+) were determined using Fourier transform infrared spectroscopy, X-ray di raction, scanning electronic microscopy and transmission electronic microscopy. The analyses confirmed the chemical modification of clay layers and the intercalation of rosin-limonene copolymer within the organophilic-clay sheets. An exfoliated structure was obtained for the lower amount of clay (1% wt of Mag-CTA+), while intercalated structures were detected for high amounts of clay (5 and 10% wt of Mag-CTA+). The thermal properties of the nanocomposites were studied by thermogravimetric analysis (TGA) and show a significant improvement inthe thermal stability of the obtained nanocomposites compared to the purerosin-limonene copolymer (a degradation temperature up to 280ºC).
- Polymer-Clay Nanocomposites: Exfoliation and Intercalation of Organophilic Montmorillonite Nanofillers in Styrene–Limonene CopolymerPublication . Derdar, Hodhaifa; Meghabar, Rachid; Benachour, Mohamed; Mitchell, Geoffrey; Bachari, Khaldoun; Belbachir, Mohammed; Cherifi, Zakaria; Baghdadli, Mohammed Chakib; Harrane, AmineNanocomposites from Styrene-Limonene copolymers and Algerian organophilic-clay named Maghnite-CTA+ (Mag-CTA+), were prepared by in-situ polymerization using different amounts (2, 5, and 10% by weight) of clay and Azobisisobutyronitrile (AIBN) as a catalyst. The Mag-CTA+ is an organophilic silicate clay prepared through a direct exchange process, using Cetyltrimethylammonuim bromide (CTAB) in which it used as green nano-filler. The preparation method of nanocomposites was studied in order to determine and improve structural, morphological and thermal properties of Sty-Lim copolymer. The struc ture and morphology of the obtained nanocomposites (Sty-Lim/Mag) were determined using Fourier trans form infrared spectroscopy (FTIR), X-ray diffraction (XRD), scanning electronic microscopy (SEM) and transmission electronic microscopy (TEM). The analyses confirmed the chemical modification of clay layers and the intercalation of Sty-Lim copolymer within the organophilic clay sheets. Exfoliated structure was obtained for the lower amount of clay (2 wt %), while intercalated structures were detected for higher amounts of clay (5 and 10 wt %). The thermal properties of the obtained nanocomposites were studied by thermogravimetric analysis (TGA) and show a significant improvement in the thermal stability compared with the pure copolymer. The obtained nanocomposites show an optimal degradation temperature of 320°C.
- Ultrasound assisted synthesis of polylimonene and organomodified-clay nanocomposites: A structural, morphological and thermal propertiesPublication . Derdar, Hodhaifa; Mitchell, Geoffrey Robert; Cherifi, Zakaria; Belbachir, Mohammed; Benachour, Mohamed; Meghabar, Rachid; Bachari, Khaldoun; Harrane, AminePolylimonene-clay nanocomposites (PLM-Mag 2, 3, 6 and 10% by weight of clay) were prepared by mix-ing Maghnite-CTA+ (Mag-CTA+) and polylimonene (PLM) in solution using ultrasonic irradiation. The catalyst preparation method were studied in order to determine and evaluate their structural, morpho-logical and thermal properties. The Mag-CTA+ is an organophylic montmorillonite silicate clay pre-pared through a direct exchange process, using green natural clay of Maghnia (west of Algeria) called Maghnite. The Algerian clay was modified by ultrasonic-assisted method using cetyltrime-thylammonuim bromide (CTAB) in which they used as green nano-reinforcing filler. Polylimonene was obtained by the polymerization of limonene, using Mag-H+ as a catalyst. The morphology of the ob-tained nanocomposites was studied by X-ray diffraction (XRD), scanning electronic microscopy (SEM), transmission electronic microscopy (TEM) and infrared spectroscopy (FT-IR). Thermogravimetric anal-ysis (TGA) shows that the nanocomposites have a high degradation temperature (200−250 °C) com-pared with the pure polylimonene (140 °C). The analyses confirmed the chemical modification of mont-morillonite layers and their uniformly dispersion in the polylimonene matrix. Exfoliated structures were obtained for low amounts of clay (2 and 3% by weight), while intercalated structures and immisci-ble regions were detected for high amounts of clay (6 and 10% by weight).