Transcrystallization behavior at the poly(lactic acid)/sisal fibre biocomposite interface

Thermally Grafting Aminosilane onto Kenaf-Derived Cellulose and Its Influence on the Thermal Properties of Poly(Lactic Acid) Composites

“…This 14 o C shift as compared to KBF shows that cellulose is less thermally stable than KBF. Wang et al (2011b) reported a similar trend, whereby after alkali treatment of sisal fibers, the thermal stability decreased. After silane grafting the cellulose, however, the mass loss step shifted to a higher temperature, with a range of 328 to 367 o C and a peak at 351.8 o C, as shown by DTG.…”

“…The -OH groups that were initially available were chemically bonded with the prehydrolysed silane. The characteristic peak at 1737 cm -1 for KBF is attributed to the carbonyl group, C=O, corresponding to acetyl groups in hemicellulose (Frone et al 2011;Tawakkal et al 2010;Wang et al 2011b), while the peaks at 1597 cm -1 and 1243 cm -1 are assigned to the aromatic C-O stretching vibration of the acetyl groups of lignin (Frone et al 2011;Tawakkal et al 2010). These peaks disappeared in the spectra of C and SGC, indicating the successful removal of hemicellulose with 5% NaOH (Wang et al 2011b) and lignin by chlorination.…”

“…The treatment of cellulose fibers with the silane coupling agent was carried out according to Wang et al (2011b) and Huda et al (2008) with slight modifications. Thermal treatment for silane grafting onto cellulose was adapted from Abdelmouleh et al (2002).…”

Silane-Treated Basalt Fiber–Reinforced Poly(butylene succinate) Biocomposites: Interfacial Crystallization and Tensile Properties

“…As shown in POM images (Figure 3), there were two different crystalline structures observed in the PBS/MBF composites, including spherulites and transcrystalline layers. Although TC structure was observed in the PBS/MBF composites, transcrystallization was essentially identical with spherulites since these two crystalline structures consist of the same lamellae and the same linear growth rate [25,34,35]. The visual difference between them is that the spherulites began to grow radially from the nuclei, while the transcrystallines grew perpendicular to the surface of silane-treated fibers.…”

“…Some authors have reported that transcrystalline of matrix polymer (i.e., poly(lactic acid) (PLA) [21], isotatic polypropylene (iPP) [22], or PBS [23]) exhibited a positive effect on the interfacial and mechanical properties. Wang et al [25] studied transcrystalline effects on sisal fiber-reinforced PLA composites. Zhou et al [9] directly introduced dopamine as a coupling agent to treat ramie fiber and investigated the interfacial crystallization of PBS.…”