Nanocomposites from Polycaprolactone (PCL)/Soy Protein Isolate (SPI) Blend with Organoclay

Abstract

New biobased, ecofriendly nanocomposites were prepared from polycaprolactone (PCL)/soy protein isolate (SPI) blend (80/20 wt/ wt) with organically modified clay, by melt compounding. X-ray diffraction and transmission electron microscopy analysis revealed that an intercalated nanocomposite was formed and the silicate layers of the clay were uniformly dispersed at a nanometer scale in matrix polymer. There was great enhancement of both tensile and dynamic mechanical properties in the nanocomposite. A rheological study revealed that the nanocomposite exhibits strong shear-thinning behavior in the melted state, and a percolated network of clay particles was formed in the melted state.

Physical and antimicrobial properties of Gelidium corneum/nano-clay composite film containing grapefruit seed extract or thymol

“…However, increase of Cloisite 30B content from 3% to 7% decreased the TS from 26.40 to 18.52 MPa because of the occurrence of intercalation (Xu et al 2006). It has been reported that for polycaprolactone-soy protein isolate hybrids, the TS of the nanocomposites was improved by the addition of 2.5% Cloisite 30B, resulting in a 50% higher value than that of the control (Nayak et al, 2008). Our results are comparable with the report although the chemical nature of the GC film is different from that of SPI.…”

“…Wu et al (2009) reported that nature agar showed a peak at 19.09°similar to GC film. In addition, the XRD pattern of pristine Cloisite Na + exhibits diffraction peaks at 7.56°(d = 11.7 Å) and 19.87°(d = 4.5 Å), which are different from other reports where the Cloisite Na + has only one peak around 7.5° (Xu et al, 2006;Nayak et al, 2008). This difference may be due to a different scan range, where other studies scanned over the range of diffraction angle 2h = 1-12°, resulting in a possible missing of peak at 19.87°, otherwise it may be attributed to an unknown reason.…”

“…X-ray diffraction analysis XRD analysis was performed to examine the interlayer spacing in clay particles, which is related with the extent of intercalation (Nayak et al, 2008). Wide angle X-ray diffraction patterns of nano-clays and the GC film containing nano-clays are shown in Figs.…”

“…Regarding the increase in E, a similar result was observed in the study of the film containing 1.5% chitosan and various amounts of nano-clay (Casariego et al 2009). Nayak et al (2008) also reported that polycaprolactone/soy protein isolate film (80/ 20, wt/wt) with Cloisite 30B showed a higher E than did the control when the clay content was lower than 2.5 wt.%.…”

The effect of Poly-ethylene-co-glycidyl methacrylate efficiency and clay platelets on thermal and rheological properties of wood polyethylene composites.

“…The most widely used clay mineral for polymer-clay nanocomposites is montmorillonite. The exfoliated clay structure possesses superior properties and gives a few advantages over other nano fillers like in terms of cost and environmental friendly matters [39] [40]. Montmorillonite modified with a dimethyl-dehydrogenated tallow, quaternary ammonium with CEC 125 meq/100g clay, density 1.66 g/cc, and d-spacing d 001 = 19.…”