Application of Response Surface Methodology to Optimize the Reaction Parameters for Grafting of Cellulosic Fiber
In this work, chemical modification of barley husk (BH) was done with palmitic acid to render its hydrophobic property. Optimization of the reaction parameters for grafting of barley husk was performed using response surface methodology (RSM) coupled with central composite design (CCD). Different process parameters were optimized at three levels: reaction time (2.5–5 h), reaction temperature (35–55 °C), solvent ratio (0, 1:3, 1:1, 3:1, 1), and monomer concentration (4.75–11.09 mol/L × 10−3). Prediction of the optimum reaction parameters was done by producing a quadratic polynomial equation in order to find the maximum value of % graft yield. The adequacy of the regression modeling was tested by using analysis of variance (ANOVA). It was observed that the most effective parameter for chemical modification of barley husk was reaction temperature. The maximum value of % graft yield was 41.53% at reaction time 4.37 h; reaction temperature 40.02 °C; solvent ratio 3:1; and monomer concentration 9.48 mol/L × 10−3. The characterization of the modified barley husk was done by using Fourier transform infrared spectroscopy (FT-IR) and scanning electron microscopy (SEM). Surface micrographs of grafted barley husk showed that surface of barley husk became rough after grafting of palmitic acid over the cellulosic backbone.
KeywordsGrafting Optimization Response surface methodology Regression modeling Infrared spectroscopy
- Bajpai S, Gupta SK, Dey A, Jha MK, Bajpai V, Joshi S, Gupta A (2012) Application of central composite design approach for removal of chromium (VI) from aqueous solution using weakly anionic resin: modeling, optimization, and study of interactive variables. J Hazard Mater 227:436–444CrossRefGoogle Scholar
- Modibbo UU, Aliyu BA, Nkafamiya II (2009) The effect of mercerization media on the physical properties of local plant bast fibres. Int J Phys Sci 4(11):698–704Google Scholar
- Ray D, Das M, Mitra D (2009) Influence of alkali treatment on creep properties and crystalinity of jute fibres. BioResources 4(2):730–739Google Scholar