Natural products are widely found in nature, their number and variety are numerous, the structures are complex and diverse. These natural products have many physiological and pharmacological activities. Glycosylation can increase the diversity of structure and function of natural product, it has become the focus of drug research and development. The impacts of glycosylation of natural products to water solubility, pharmacological activities, bioavailability, or others were described in this review, which provides a reference for the development and application of glycosylated natural products.

An effective strategy was reported to fabricate poly(ethylene vinyl alcohol) (EVOH) nanocomposites with well-dispersed thermally reduced graphene (TRG) sheets in a polymer matrix via a solution-mixing method. TRG was successfully exfoliated into few-layer isolated nanosheets by rapid heating of dry graphene oxide powders under inert gas and high temperature. The resultant TRG/EVOH composites turned out to have a 280% increase in tensile strength (30.5 MPa) and a 400% increase in Young’s modulus (1111.7 MPa) by adding only 4.0 wt % TRG, compared to those of neat EVOH. Moreover, the permeability coefficient of O2 for the TRG/EVOH nanocomposite films with only 0.5 wt % TRG loading is significantly decreased to 8.517 × 10–15 cm3 cm cm–2 s–1 Pa–1, which is nearly 1671 times lower than that of neat EVOH films. Therefore, the TRG/EVOH nanocomposites offer excellent potential applications as packaging materials to extend the shelf life of perishable goods and prescription medicines.

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