Homogeneous grafting of cellulose with polycaprolactone using quaternary ammonium salt systems and its application for ultraviolet-shielding composite films

Abstract

Microcrystalline cellulose grafted polycaprolactone (MCC-g-PCL) was successfully synthesized by ringopening copolymerization catalyzed by 4-dimethylaminopyridine in a dual tetrabutylammonium acetate/ dimethyl sulfoxide solvent system. A novel ultraviolet-shielding film based on MCC-g-PCL was prepared by introducing graphene oxide (GO). The results obtained showed that the introduction of GO not only obviously influenced the inherent structure of the MCC-g-PCL but remarkably changed the surface morphology of the composite film. Moreover, the GO/MCC-g-PCL composite showed a significant improvement in tensile strength, from 2.63 to 4.55 MPa, as well as elongation-at-break, from 6.4% to 15.5%, compared with the pure MCC-g-PCL film, owing to the strong hydrogen-bonding interaction that physically crosslinked GO with MCC-g-PCL. Importantly, GO/MCC-g-PCL composite films offered an effective high-energy light-shielding capacity; in particular MCC-g-PCL film containing 1.0 wt% GO possessed good absorbance between 200 nm and 300 nm. This study provides a framework for developing cellulose-based ultraviolet-shielding polymers and better understanding the ultravioletshielding mechanism.

Cellulose Nanocrystal Surface Cationization: A New Fungicide with High Activity against Phycomycetes capsici

“…This result was due to the greater hydrophobic behavior of CNC@CTAB. This result was also inconsistent with the formal reports and proved that the CTAB was successfully coated on the CNC surface [41]. However, as there was no chemical reaction happened between CNC and CTAB, the coating of CTAB onto the CNC surface showed no effect on the crystalline structure of the CNC (Figure 1b).…”

Natural Fiber-Reinforced Polycaprolactone Green and Hybrid Biocomposites for Various Advanced Applications

“…Yu et al (2018) [ 151 ] developed a graphene oxide–CNC–PCL biocomposite using quaternary ammonium salt systems to be used in ultraviolet-shielding films. The preparation of biocomposites involved grafting the CNC with PCL by ring-opening copolymerization catalysed by 4-dimethylaminopyridine in a dual tetrabutylammonium acetate–dimethyl sulfoxide solvent system.…”

Fully Green Poly(vinyl alcohol)/Tea Polyphenol Composites and Super Anti‐Ultraviolet and ‐Bacterial Properties

“…For example, Hu et al have c37 Niu et al have produced cellulose nanofiber‐based films with the bearing UV shielding property. [ 38 ] By grafting of cellulose with polycaprolactone using quaternary ammonium salt systems, Yu et al [ 39 ] have prepared UV‐shielding composite films. According to Jing et al, the nanofibrous membranes are capably prepared with the antibacterial and UV protection.…”

“…To prepare materials with anti‐UV properties is recently greatly interested by both scientists and engineers due to the greatly request of the sunglass and textiles. [ 37–50 ] As has been known that the anti‐UV properties have been issued standards by different countries. [ 51–55 ]…”

“…Unlike above introduced cases by hybriding the organic–inorganic nanomaterials, [ 37–50,56 ] Figure showed the anti‐UV results from we prepared PVA/TP composites as‐received or after immersing in water, 25 °C, after 24 or 72 h with different TP percent, respectively. In order to comprehensively understand and compare the anti‐UV properties of these PVA/TP composites, Table 2 furthermore summarized the determined UPF, T UVA and T UVB values.…”