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    • 5. 发明申请
    • THERMO-RESPONSIVE BLOCK CO-POLYMERS, AND USE THEREOF
    • 热反应块共聚物及其用途
    • WO2007075502A2
    • 2007-07-05
    • PCT/US2006/048103
    • 2006-12-15
    • THE TRUSTEES OF THE UNIVERSITY OF PENNSYLVANIAQIN, ShuhuiYANG, ShuDISCHER, DennisGENG, Yan
    • QIN, ShuhuiYANG, ShuDISCHER, DennisGENG, Yan
    • A61K9/50
    • A61K9/1273A61K47/34C08F293/005C08F2438/03
    • Provided are thermo-responsive polymersomes, which display cold-controlled encapsulation near the physiological temperatures, and have a PDI less than 1.2. Morphology of the thermo- responsive polymersomes is a function of the weight fraction of the hydrophilic block in the block copolymer and the number average molecular weight (Mn) of the block copolymer. When the lower critical solution temperature (LCST) is at, or slightly above physiological temperature, the thermo-responsive block displays hydrophobic properties, such that the block copolymer self-assembles in aqueous solution to form a polymersome with the thermo- responsive block occupying the core of the polymersome and the hydrophilic block occupying the corona of the polymersome. Below the LCST, the thermo-responsive block displays hydrophilic properties, such that the polymersome dissociates, providing fast release of an active agent encapsulated therein.
    • 提供的是热响应聚合物囊泡,其在生理温度附近显示冷控制的包封,并且PDI小于1.2。 热响应性聚合物的形态是嵌段共聚物中亲水嵌段的重量分数和嵌段共聚物的数均分子量(Mn)的函数。 当低临界溶解温度(LCST)处于或略高于生理温度时,热响应性嵌段显示疏水性质,使得嵌段共聚物在水溶液中自组装形成聚合物体,其中热响应性嵌段占据 聚合物的核心和占聚合物的电晕的亲水性嵌段。 在LCST之下,热响应块显示出亲水性质,使得聚合物组分解,提供封装在其中的活性剂的快速释放。