Novel modified MOF intercalated hydrotalcites was synthesized for catalyzing the conversion of glycerol into high value-added glycerol carbonate in this paper. [APmim]OH/ZIF-8 was prepared by encapsulating aminopropyl hydroxide imidazole ionic liquid in ZIF-8 and inserted in Ca–Mg–Al hydrotalcites with layered structures to prepare [APmim]OH/ZIF-8/LDH with strong basicity and high specific surface area. ZIF-8, [APmim]OH/ZIF-8 and [APmim]OH/ZIF-8/LDH were characterized by XRD, FT-IR, SEM and nitrogen adsorption–desorption. The results showed that the conversion rate of glycerol can reach 98.6% and the glycerol carbonate yield was 96.5% in the transesterification of glycerol with dimethyl carbonate catalyzed by [APmim]OH/ZIF-8/LDH when the molar ratio of DMC and glycerol was 3 : 1, the catalyst dosage was 3 wt%, the reaction temperature was 75 °C and the reaction time was 80 minutes. The glycerol conversion rate can still reach more than 90% after five reaction cycles.
In the plastic industry, replacing petrochemical-based polymers with naturally occurring bio-polymers (represented by cellulose), is a very promising route to circumvent the plastic pollution issue. However, the implementation of this is severely hindered by the high water affinity and flammability of such materials. Here, a verstile non-isocyanate polyurethane (NIPU) formulation composed of a CO 2 -based cyclic carbonate compound, a reactive amino-functionalized silicone oil concurrently capable of providing water-resistance and a flame-retardant moiety is designed. Compositing it with conventional cellulose paper (cellulose macrofiber network, CMN), a nonflammable and mechanically strong cellulose macrofiber network-based biocomposite (CMN-Biocomposite) can be easily obtained via transcarbamoylation reaction. Other than hydrogen bonding interaction among various components of CMN-Biocomposite, the intermolecular bond exchange mechanism between the dynamic carbamate moiety and hydroxyl of the cellulose is also experimentally and computationally determined as the governing factor for the high tensile strength of up to 57.9 MPa. Additionally, benefiting from the dynamic nature of the carbamate bond, the CMN-Biocomposite's processability and biodegradability outperform most petrochemical-based plastics. The superiority of the proposed synthetic strategy in achieving the long-term carbon neutrality goal by CO 2 fixation and excellent performance for plastic applications make the CMN-Biocomposite a very promising alternative to conventional plastics.
危险品化学品经营许可证（带存储）