Hybrid waterborne polyurethane/polydopamine (WPU/PDA) matrix, showing the adhesive properties of PDA in its entirety, was utilized for immobilization lysostaphin (Lys), an important anti-staphylococcal agent, to obtain highly effective antibacterial and antibiofilm surface coatings. WPU/PDA matrix prepared by encapsulation WPU particles with aqueous dispersion applied as coatings on substrates,...

Acrylic acid has good environmental weather resistance, water alcohol dirt and other properties. An acrylic dispersion with a core–shell structure was prepared reacted polyisocyanate-type curing agent to prepare waterborne polyurethane topcoat suitable for wood. The two-component used in combination primer sealing applied Pine (Pinus strobus) boards carry out gloss, wear adhesion experiments. e...

The extracellular stability versus intracellular drug release and the long blood stream circulation versus enhanced cell uptake are two dilemmas for micellar drug delivery systems. To resolve the above two problems, a novel core cross-linked polyurethane micelles with redox sensitive and pH-responsive surface charge switchable properties were prepared and investigated as anti-cancer drug carrie...

Flexible and semi-rigid polyurethane foams have been widely used in automotive interior parts, residential upholstered furniture and bedding. In these, as well as other end use industries, a reduction of Volatile Organic Compounds (VOCs) emissions from polyurethane foams continues to be an important issue [1, 2]. To address this challenge, reactive amine catalysts, which have an active hydrogen...

Anisotropic polymer foams have been prepared, which exhibit a Poisson's ratio exceeding 1, and ratios of longitudinal to transverse stiffness exceeding 50. The foams are as much as 20 times stiffer in the longitudinal direction than the foams from which they were derived. The transformation process involved applying a uniaxial stress sufficient to produce 25% to 45% axial strain to open-cell po...

OBJECTIVE Elastomeric materials play an important role in the orthodontic practice, including the retraction force to move teeth into extraction sites, closing diastemas, selective shifting of the midline and generalized space closure. Frictional resistance and ligating strength of archwire-bracket-ligature complex occurs during utilization of elastomeric and metallic ligatures when orthodontic...

determination of blood compatibility is an important problem in blood contacting devices. in this study, two classes of materials including polyurethane (based on polyethylene glycol and poly tetrametylene oxide) and polyvinyl alcohol samples, with different hydrophilicity properties were synthesized and their physico-chemical properties were compared. water uptake ratio, ftir spectroscopy, and...

The objective of this research is to develop soy-based polyurethane (PU) foam product reinforced with carbon nanotubes. The shortage of petroleum and the increasing concern on environmental issues have resulted in an interest in using renewable substances as building blocks for polymer applications. Multi-walled carbon nanotube (MWNT) was used in this study to reinforce the soy-based polyuretha...