Controllable Synthesis Of Nanosized Resorcinol Formaldehyde Resin Via Liquid Phase Method And Its Application

Nanostructured phenolic resin has been considered as a kind of potential materials in various fields,including drug delivery carriers,lithium-ion battery electrodes,and catalyst supporters.This can be ascribed to their excellent biocompatibility and high carbon conversion rate.In this paper,on the basis of resorcinol-formaldehyde(RF)resin,different chemical synthesis methods were employed to prepare various nanostructures,including carbon nanospheres with different surface morphologies,hollow carbon spheres and Janus nanostructures.The main work are summarized as follows:1.By employing SiO2 as hard-template,SiO2@RF core-shell nanostructure was successfully prepared in a mixed solvent of water and ethanol.Nanostructures with smooth or raspberry-like morphology can be tuned by adjusting the ratio of water/ethanol of the solvent.Hollow colloidal carbon nanostructures can be obtained after carbonization at high temperature and etched in dilute hydrofluoric acid solution.The hollow carbon nanospheres have been devoted into the LDI-MS detection of peptides.The as-prepared raspberry-like hollow carbon spheres displayed better performance than smooth hollow ones.2.The hollow carbon nanospheres were synthesized through a modified-Stober method.Yolk-shell and hollow nanostructures were obtained by dispersing the RF nanospheres into ethanol and acidic ethanol,respectively.This can be ascribed to the lower polymerization degree of the inner layer than that of the outer layer.Thus the inner layer could be dissolved into alcohol.After carbonization,the hollow carbon nanospheres have higher surface area and better electrochemical performance in comparison with the solid ones.3.Janus dendritic mesoporous silica-resorcinol-formaldehyde(DMS-RF)nanoparticles were prepared via a simple one-pot colloidal method.Eccentric and concentric DMS-RF nanostructures can be obtained by tuning the reactants addition moment during the process.A competing growth mechanism has been proposed.The yield of the Janus nanostructure can reach almost 100%.Platinum nanoparticles can be loaded on the RF side even the whole Janus nanostructure to obtain composite with high catalytic performance.Therefore,the Janus nanostructure can act as an excellent support for catalysts during the catalytic reactions.