Preparation and Properties of Polyurethane Composite Foams with Silica-Based Fillers

Polyurethane composite foams were prepared by adding three different types of silica materials as a filler to improve the mechanical and thermal insulation properties. The first type consists aerogels with high-volume pores, expectation improving PU because aerogel itself has superior Silica nanoparticle is used for second that size very similar pore comparison. last produce polyurethane foam uses sol–gel reaction polysiloxane reacts polyols during urethane forming process. In particular, in case nanoparticles, their surfaces are modified APTES then polymeric methylene diphenylene diisocyanate (PMDI) increase interaction between polymer matrix inorganic fillers. structure was successfully produced all cases foams. As expected, properties effect enhanced addition fillers, but found be closely related cell small amounts fillers improves properties, higher amount filler, worse they due agglomeration on walls. dispersion added within cells should controlled effectively. Surface-modified exhibit better enhancement