In situ wound sprayable double-network hydrogel: Preparation and characterization

In clinical settings the wound-dressing was required easy to use and can match the wound area immediately, at the same time they need to have the properties of hemostats, anti-inflammation and promoting wound healing. To get an ideal wound dressing, we developed a type of gel-like wound adhesive patch from spraying double-network hydrogel, which own the properties of self-antibacterial and can promote wound healing. By spraying, the gel-like wound adhesive patch can match the wound area immediately and form a gel-film in 10 s. Sodium carboxymethyl cellulose as p H sensitive materials accelerated the speed to form the gel-film and enhanced ductility of the wound adhesive patch. In vitro experiments show that, this gel-like wound adhesive patch can promote cell proliferation and reduce cell apoptosis.In vivo studies show that, compared with commercialized wound dressings in clinic using, the spraying gel-like wound adhesive patch from our work has a better effect on wound healing. In conclusion, the spraying gel-like wound patch in our work is easy to use and can form a gel-film match on wound area in a short time, also it has the properties of hemostats, anti-inflammation and promoting wound healing.Its feasibility for mass production shows a good potential for commercial use.

High thermal conductivity of graphene and structure defects:Prospects for thermal applications in graphene sheets

The utilization of thermal energy from different sources is an important development direction for conserving energy.With the development of technology,refined and rapid utilization of thermal energy is required.Traditional thermal conductive materials cannot meet the growing needs of human beings.Therefore,people pay attention to two-dimensional graphene film materials for their thermal conductivity.This review collects current modeling group of thermal transport on graphene,including non-equilibrium Green function(NEGF)theory,molecular dynamics(MD)simulations modeling and Boltzmann transport equation method.These models can well explain several phenomena of phonon transport in graphene.Furthe r,structural de fects were discussed and expounded the effect for graphene thermal conductivity,including doping,grain bounda ry and defects.Deeply understanding of defects on graphene,we can better grasp the thermal conductivity of graphene from the microscopic point of view.