Effect of nanoclay on optical properties of PLA/clay composite films

Influence of plasticizers on thermal properties and crystallization behaviour of poly(lactic acid) films obtained by compression moulding

“…The most significant differences in film transmittance were found in the UV region, where Palamoll®638‐ and PEG‐containing films strongly blocked UV light. The main reduction of the transmittance started at wavelengths below approximately 340 nm, regardless of the formulation, in accordance with the observations of Cele et al The greatest blocking effect was found when the plasticizer content was 10%, thus indicating that this effect is directly related to plasticizer content. Furthermore, both PEG plasticizers were more effective at reducing the transmission of UV irradiation than Palamoll®638.…”

“…Previous works have studied the behaviour of PLA films when exposed to UV‐visible irradiation. Arrieta et al found that cellulose nanoparticles were able to block UV light when added to PLA–polyhydroxybutyrate films whereas Cele et al observed that clay nanoparticles reduced the transparency of films but no further discussion was considered in the UV range. For the obtained PLA films, a marked reduction in the UV light transmission was observed when they contained plasticizers, as shown in Fig.…”

Effect of TiO2 and ZnO on PLA degradation in various media

“…The figures 1 and 2 underline that by increasing the amount of fillers the transmittance, primarily in the visible region, decreases respect to that of PLA and the shape of the curves are greatly different. This effect could be ascribed to the nature of the filler (TiO 2 nanoparticles and ZnO particles), which absorb differently the energy and also to the distribution and agglomeration trend with respect to the fillers loading [24,25]. Comparing the two PLA trends, it results that the compression-moulded PLA film (Figure 1) has lower transmittance than the caledered PLA film (Figure 2).…”

Study on Thermal Performance of Composites Prepared Using Poly(L-Lactic Acid) and Melamine

“…Maider et al reported the use of clay could increase the thermal stability of PLLA/nanoclay nanocomposites, and decreased the degradation rate during processing [4]. Cele et al [5] also used clay to investigate the effect of nanoclay on optical properties of PLLA/clay films. The morphological results of PLLA/clay films showed surface roughness increased as a function of clay content, and the refractive index, extinction coefficient and absorption of light correlated with the thickness of PLLA/clay films and clay loading, respectively.…”