Experimental methods in chemical engineering: Rheometry

Ghanbari, Abbas; Mousavi, Zeinab; Heuzey, Marie‐Claude; Patience, Gregory S.; Carreau, Pierre J.

doi:10.1002/cjce.23749

Cited by 38 publications

(25 citation statements)

References 63 publications

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“…57 Hence, according to contour plot in Fig. 5(a2), catalyst dosage and concentration show prominent interaction on removal efficiency of BPA, which is in good agreement with statistically signicant result in Table 2 and large magnitude of term AB in eqn (3). As shown in two gures ( Fig.…”

Section: Response Surface Analysissupporting

confidence: 75%

“…Hence, BPA has been detected in various environmental media, including municipal wastewaters, sewage, surface water, landlls and so on. 3,4 Moreover, previous experimental and epidemiological studies 5,6 have shown that BPA had the potential to affect the endocrine system through disturbing the synthesis, transport and metabolism of estrogenic and thyroid hormones. BPA has caused great concern due to its widespread application and large production.…”

Section: Introductionmentioning

confidence: 99%

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Investigation on enhanced photocatalytic degradation of bisphenol A with bismuth oxyiodide catalyst using response surface methodology

et al. 2018

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In this study, Bi 7 O 9 I 3 photocatalyst was successfully synthesized via a simple and rapid microwave irradiation method. The characterization of prepared photocatalysts was determined by powder X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), transmission electron microscopy (TEM), energy dispersive spectrometry (EDS), UV-vis diffuse reflectance spectroscopy (DRS) and photoluminescence (PL). The photocatalytic performance was determines by the degradation of bisphenol A (BPA) under xenon lamp illumination. The Bi 7 O 9 I 3 catalyst exhibited superior photocatalytic performance and the first-order kinetic rate constant of Bi 7 O 9 I 3 was about 4.2 times greater than that of BiOI. The enhanced photocatalytic activity was associated with surface morphology, suitable band gap energy and low recombination rate of electron-hole pairs. Furthermore, the photocatalytic efficiency of BPA with Bi 7 O 9 I 3 was systematically investigated using a three factor, three level Box-Behnken experimental design and response surface methodology (RSM). A quadratic polynomial model was proposed. Experimental and predicted values exhibited a good correlation with a predicted R 2 value of 0.9016. A relative significance study of three independent variables showed that catalyst dosage had the most significant positive effect on the degradation of BPA, followed by initial concentration of BPA and pH value. The prepared Bi 7 O 9 I 3 is a promising photocatalyst for practical application in organic pollutant decomposition.

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Section: Response Surface Analysissupporting

confidence: 75%

Section: Introductionmentioning

confidence: 99%

Investigation on enhanced photocatalytic degradation of bisphenol A with bismuth oxyiodide catalyst using response surface methodology

et al. 2018

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“…Moreover, low aspect ratio fibers are more easily aligned along the direction of flow than those having a higher aspect ratio, causing less restriction on the flowability of the composite. [38][39][40] HDTs of the neat TPO matrix and its glass fiber reinforced composites were obtained under a load of 0.455 MPa and are presented in Figure 8. HDT measurements were performed to investigate short-term heat resistance of the samples and investigate the maximum temperature at which polymer can be used as a rigid material.…”

Section: F I G U R E 3 Glass Fiber Length Dispersion For Thermoplastimentioning

confidence: 99%

Mechanical properties of extruded glass fiber reinforced thermoplastic polyolefin composites

et al. 2020

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Engineered structural materials are required to feature a combination of deformability (ductility) and strength to be considered damage‐tolerant for safety‐critical applications. These two mechanical properties, however, tend to be mutually exclusive, encouraging optimization of the trade‐off between strength and toughness. In this report, an elastomer and a glass fiber were incorporated into a blend of two grades of polypropylene (PP) to improve matrix toughness through both intrinsic and extrinsic toughening mechanisms. This study investigates the impact resistance (at 23°C and −30°C), and strength, stiffness, deformability, and processability of extruded compatibilized glass fiber reinforced thermoplastic polyolefin (TPO) composites at 23°C. For the hybrid composites contribution of different toughening mechanisms in attainment of the final impact strength is governed by the testing temperature and processing (extruder screw) speed. The intrinsic toughening mechanism induced by the presence of the ethylene α‐olefin copolymer is suppressed by the introduction of glass fiber at 23°C, irrespective of screw speed and screw configuration design. The heat distortion temperature (HDT), flexural modulus, and tensile strength exhibit a marked improvement by glass fiber inclusion at 23°C. By evaluating the performance of the composites at −30°C, it was observed that the impact energy of the elastomer modified hybrid composites may be enhanced in the same manner as the glass fibers toughen the brittle unmodified PP matrix. It was noted that contrary to the tensile properties at break, the yield behavior of the composites containing fibers, severely shortened, is independent of the presence of the fibers at 23°C.

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“…This enhancement of HDT in the composite system could be due to the improvement of modulus, the reduction of high‐temperature creep, and restricted relaxation of macromolecules in the presence of fillers at high temperatures. [ 2,37,38 ]…”

Section: Resultsmentioning

confidence: 99%

Mechanical properties and foaming behavior of polypropylene/elastomer/recycled carbon fiber composites

et al. 2021

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Research on lightweight products for transportation industry, to address fuel efficiency and lower carbon footprint, has attracted great attention due to public environmental awareness. Polymer composites containing carbon fiber are boosted by automotive original equipment manufacturers (OEMs) as a replacement for steel. However, their high cost has generated interest to find cost‐effective alternatives. In this report, a recycled carbon fiber and an elastomer are introduced to polypropylene impact copolymers to modify matrix properties in terms of strength and toughness. Fractography analysis is carried out to elucidate the failure mechanisms governing the mechanical performance of the compatibilized carbon fiber reinforced thermoplastic polyolefin (TPO) composites. The results suggest that for the TPO composites, toughened by an ethylene‐1‐octene copolymer, the complex interplay of intrinsic and extrinsic toughnesses in impact resistance is predominantly governed by the presence of the fibers. Incorporating 20 wt% recycled carbon fibers into the matrix resulted in an improvement of the heat distortion temperature (HDT) by 100 °C, and ~ 3.5 and ~ 11.5 times enhancements in tensile strength and stiffness, respectively. Moreover, microcellular foams with expansion ratios higher than 11 and 5 were achieved for the neat samples and reinforced composites, respectively, confirming the foamability of composites with such a high carbon fiber content.

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Experimental methods in chemical engineering: Rheometry

Cited by 38 publications

References 63 publications

Investigation on enhanced photocatalytic degradation of bisphenol A with bismuth oxyiodide catalyst using response surface methodology

Investigation on enhanced photocatalytic degradation of bisphenol A with bismuth oxyiodide catalyst using response surface methodology

Mechanical properties of extruded glass fiber reinforced thermoplastic polyolefin composites

Mechanical properties and foaming behavior of polypropylene/elastomer/recycled carbon fiber composites

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