Optimization of processing parameters for the synthesis of low‐density polyethylene/organically modified montmorillonite nanocomposites using X‐ray diffraction with experimental design

Campos-Requena, Víctor H.; Rivas, Bernabé L.; Pérez, Mónica A.; Contreras, David; Muñoz, Eduardo

doi:10.1002/pi.4465

Cited by 8 publications

(3 citation statements)

References 15 publications

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“…The response surface methodology (RSM) establishes the relationship between a measured response and a variety of factors that influence an outcome [12]. Nwabueze [13] mentioned that importance to adapt the RSM as a mathematical model for bioprocess optimization is based on determining the optimum process variable combinations that maximize or minimize that product response.…”

Section: Introductionmentioning

confidence: 99%

Antioxidant Compound Extraction from Maqui (Aristotelia chilensis [Mol] Stuntz) Berries: Optimization by Response Surface Methodology

2017

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The optimum conditions for the antioxidant extraction from maqui berry were determined using a response surface methodology. A three level D-optimal design was used to investigate the effects of three independent variables namely, solvent type (methanol, acetone and ethanol), solvent concentration and extraction time over total antioxidant capacity by using the oxygen radical absorbance capacity (ORAC) method. The D-optimal design considered 42 experiments including 10 central point replicates. A second-order polynomial model showed that more than 89% of the variation is explained with a satisfactory prediction (78%). ORAC values are higher when acetone was used as a solvent at lower concentrations, and the extraction time range studied showed no significant influence on ORAC values. The optimal conditions for antioxidant extraction obtained were 29% of acetone for 159 min under agitation. From the results obtained it can be concluded that the given predictive model describes an antioxidant extraction process from maqui berry.

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Section: Introductionmentioning

confidence: 99%

Antioxidant Compound Extraction from Maqui (Aristotelia chilensis [Mol] Stuntz) Berries: Optimization by Response Surface Methodology

2017

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“…Not only are technological systems and development of new materials important, but the use of efficient and refined experimental procedures and statistical data treatment methods are urgently needed to achieve a deeper understanding of drug release mechanisms. The design of experiments (DoE) is an effective method for the simultaneous evaluation of several variables in order to detect interactions among variables, and it reduces the number of experiments, time and resources needed for such complex evaluations . Applying multivariate calibration techniques to a DoE data set can provide useful information when several variables must be correlated with several responses at the same time.…”

Section: Introductionmentioning

confidence: 99%

Short‐ and long‐term loss of carvacrol from polymer/clay nanocomposite film – a chemometric approach

Campos-Requena

Rivas

Pérez

et al. 2016

Polymer International

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A combination of partial least squares (PLS) regression and design of experiments was used to analyse and define the shortand long-term loss mechanisms of carvacrol from polymer/clay nanocomposite films used as an antimicrobial food packaging material. Three formulation x variables were evaluated: type of nanoclay, concentration of nanoclay and concentration of compatibilizer agent. Five experimental y responses were measured: loss of carvacrol from the films stored at room conditions on the third and fifth days (short-term loss); on the forty-fifth and sixtieth days (long-term loss); and the polymer/clay level of intercalation. All variables and responses were simultaneously calibrated by an ANOVA-validated (P < 0.05) comprehensive PLS interaction model with a satisfactory R 2 = 0.956 and Q 2 = 0.505. A differentiation and discrimination of the mechanisms that control the loss of carvacrol over different periods of time was observed. Short-term loss seems to be controlled mainly by direct molecular interactions in the interlayer space between carvacrol and the nanoclay organomodifier. Long-term loss seems to be mainly controlled by diffusion within the nanocomposite matrix once carvacrol has left the nanoclay interlayer space, and it is closely related to the levels of intercalation reached in the nanocomposite.

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“…In contrast, statistical experimental design using RSM can catch the relationship between various parameters and the responses, and further identify the significance of these variables on the coupled responses [19]. Therefore, RSM has been widely used for process analysis and modeling [20][21][22][23][24][25]. The key factors can be determined just using the minimum number of designed experiments and accordingly, the optimal process parameters can be much conveniently gained.…”

Section: Introductionmentioning

confidence: 99%

Optimization of Poly(phenylene sulfoxide ether sulfide ether) Synthesis by Response Surface Methodology

Gu¹,

Liu³

et al. 2014

AMM

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To increase the molecular weight of poly (phenylene sulfide ether) (PPSE), a novel route has been developed via the reduction of poly (phenylene sulfoxide ether sulfide ether) (PPSOESE) precursor. The synthesis of high molecular weight PPSOESE is essential for the ultimate purpose. Effects of process parameters on preparation of PPSOESE were firstly investigated and the optimization was performed by response surface methodology (RSM). Average number molecular weight (Mn) and Yield of PPSOESE were defined as the experimental responses. The statistical analyses indicate that the most significant factor is monomer concentration, followed by reaction temperature and the interaction of reaction temperature • monomer concentration. Under optimal conditions, the and Yield responses were obtained as 1.78 ×104±1.02 % and 93.6±1.3 %, which are in agreement with the predicted values of 1.80 ×104and 95.4 %, respectively. Structure of PPSOESE was also characterized. The highest intrinsic viscosity and yield of PPSE by the reduction of PPSOESE reached to 0.78 dL/g and 93.2%, respectively, much greater than the reported results. The work is helpful for forthcoming preparation and study of high molecular weight PPSE.

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Optimization of processing parameters for the synthesis of low‐density polyethylene/organically modified montmorillonite nanocomposites using X‐ray diffraction with experimental design

Cited by 8 publications

References 15 publications

Antioxidant Compound Extraction from Maqui (Aristotelia chilensis [Mol] Stuntz) Berries: Optimization by Response Surface Methodology

Antioxidant Compound Extraction from Maqui (Aristotelia chilensis [Mol] Stuntz) Berries: Optimization by Response Surface Methodology

Short‐ and long‐term loss of carvacrol from polymer/clay nanocomposite film – a chemometric approach

Optimization of Poly(phenylene sulfoxide ether sulfide ether) Synthesis by Response Surface Methodology

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