公开(公告)号：US20060269751A1

公开(公告)日：2006-11-30

申请号：US11436680

申请日：2006-05-18

申请人： J. Winstead ,  William Grimm

发明人： J. Winstead ,  William Grimm

IPC分类号： B32B1/00 ,  B32B27/00

CPC分类号： G01N33/5434 ,  G01N2446/10 ,  Y10T428/2991 ,  Y10T428/2993 ,  Y10T428/2995 ,  Y10T428/2996 ,  Y10T428/2998

摘要： Magnetically responsive particles can include two or more magnetically responsive layers (“MRL”). As such, the particles can have the following: a polymeric core; a first magnetically responsive layer (“MRL”) on the core; a first polymeric layer bound to the first MRL; a second MRL layer bound to the first polymeric layer; and a second polymeric layer bound to the second MRL. The particles can have a faster magnetic response time compared to a similar particle having only a single MRL, which can be at least 25% faster. Also, the particle can have a magnetic squareness of less than about 0.1. Preferably, the particle can have negligible residual magnetism after being exposed to a magnetic field sufficient for the particle to respond thereto. Further, the particle can be colloidally stable in water at concentrations from about 0.1 to 10 grams of particle per 100 milliliters of water.

摘要翻译： 磁响应颗粒可以包括两个或更多个磁响应层（“MRL”）。 因此，颗粒可以具有以下：聚合物芯; 核心上的第一磁响应层（“MRL”）; 与第一MRL结合的第一聚合物层; 与第一聚合物层结合的第二MRL层; 和与第二MRL结合的第二聚合物层。 与仅具有单个MRL的相似颗粒相比，颗粒可以具有更快的磁响应时间，其可以比至少快25％。 此外，颗粒可以具有小于约0.1的磁矩。 优选地，在暴露于足以使颗粒响应的磁场之后，颗粒可以具有可忽略的剩余磁性。 此外，颗粒可以在水中胶体稳定，浓度为每100毫升水约0.1至10克颗粒。