Swellable polymers with hydrophobic groups

    公开(公告)号:AU2010248837A1

    公开(公告)日:2012-01-19

    申请号:AU2010248837

    申请日:2010-05-14

    Abstract: The invention is directed to crosslinked water-soluble swellable polymers, methods for making same and their various uses. More particularly, the invention relates to a composition comprising expandable polymeric particles being made with 0.1-5% hydrophobic monomers and labile crosslinkers and stable crosslinkers, said particles mixed with a fluid. A particularly important use is as an injection fluid in petroleum production, where the expandable polymeric particles are injected into a well and when the heat and/or pH of the target zones in the formation cause degradation of the labile crosslinker and when the particle expands, the hydrophobic groups associate to form a hydrophobically associative polymer, thus diverting water to lower permeability regions and improving oil recovery.

    MICROSPHERE-BASED MATERIALS WITH PREDEFINED 3D SPATIAL AND TEMPORAL CONTROL OF BIOMATERIALS, POROSITY AND/OR BIOACTIVE SIGNALS

    公开(公告)号:CA2702335A1

    公开(公告)日:2009-04-16

    申请号:CA2702335

    申请日:2008-10-10

    Applicant: UNIV KANSAS

    Abstract: A tissue engineering scaffold for growing cells can include a plurality of biocompatible microspheres linked together to form a three-dimensional matrix. The matrix can include a plurality of pores for growing cells. The biocompatible microspheres can include first and second sets of microspheres. The first set of microspheres can have a first characteristic, and a first predetermined spatial distribution with respect to the three-dimensional matrix. The second set of microspheres can have a second characteristic that is different from the first characteristic, and a second predetermined spatial distribution that is different from the first predetermined spatial distribution with respect to the three - dimensional matrix. The first and second characteristics can selected a composition, polymer, particle size, particle size distribution, type of bioactive agent, type of bioactive agent combination, bioactive agent concentration, amount of bioactive agent, rate of bioactive agent release, mechanical strength, flexibility, rigidity, color, radiotranslucency, radiopaqueness, or the like.

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