Effect of addition of nanoclay, beeswax, tween-80 and glycerol on physicochemical properties of guar gum films
2016
Saurabh, Chaturbhuj K. | Gupta, Sumit | Variyar, Prasad S. | Sharma, Arun
Effect of addition of nanoclay (nanofil-116), beeswax, tween-80 and glycerol on physicochemical properties of guar gum (GG) films was studied using response surface methodology (RSM). Beeswax produced reduction in water vapor transmission rate (WVTR) and tensile strength (TS). An improvement in TS with reduction in WVTR was observed due to nanoclay. Concentrations of various additives were optimized to prepare films with improved properties. Optimized concentrations (beeswax: 0.63%; nanoclay: 2.5%; tween-80: 0.63%; glycerol: 11.87% w/w GG) resulted in TS of 98MPa and WVTR of 89g/m2/d. Compatibility between GG and beeswax was further increased using gamma irradiation. RSM study with 50kGy irradiated beeswax was performed and optimum concentration of tween-80 (0.88%), irradiated beeswax (50kGy) (1.21%), glycerol (13.91%), nanoclay (3.07%) w/w of GG resulted in films having TS of 122 MPa and WVTR of 69g/m2/d. Guar gum based films with improved mechanical and barrier properties were successfully prepared.
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