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公开(公告)号：US6027795A
公开(公告)日：2000-02-22
申请号：US823897
申请日：1997-03-17
CPC分类号： A61L15/32 , A61L15/26 , A61L15/28 , A61L15/425 , C08J9/28 , Y10S264/16 , Y10S264/18 , Y10S502/514 , Y10S521/905 , Y10T428/249954 , Y10T428/249979 , Y10T428/249995
摘要： An absorbent, microporous foam comprising a crosslinked polymer having interconnected fluid cells distributed throughout its mass, wherein the fluid cells have a diameter of between about 0.1 and about 100 .mu.m, and wherein the foam can rapidly absorb at least about twice its dry weight in fluid, is disclosed. Also disclosed is a method for producing such microporous, absorbent foams. In this method: (a) a crosslinkable polymer and a first solvent are mixed to form a stable solution which can be induced to phase separate; (b) the stable solution is induced to phase separate into a polymer concentrated phase and a polymer dilute phase; (c) the polymer is induced to crosslink in the polymer concentrated phase for a predetermined period of time thereby forming a microporous material; and (d) the microporous material is dried to produce the absorbent foam.
摘要翻译： 一种吸收性微孔泡沫，其包含交联的聚合物，其具有分布在其整个质量块中的相互连接的流体细胞，其中流体细胞的直径为约0.1至约100μm，并且其中泡沫可以快速吸收其干重至少约两倍的干重 流体。 还公开了一种生产这种微孔吸收泡沫的方法。 在该方法中：（a）可交联聚合物和第一溶剂混合形成可诱导相分离的稳定溶液; （b）将稳定的溶液诱导相分离成聚合物浓缩相和聚合物稀释相; （c）将聚合物在聚合物浓缩相中诱导交联预定的时间，从而形成微孔材料; 和（d）将微孔材料干燥以产生吸收性泡沫体。
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公开(公告)号：US5573994A
公开(公告)日：1996-11-12
申请号：US242548
申请日：1994-05-13
CPC分类号： A61L15/32 , A61L15/26 , A61L15/28 , A61L15/425 , C08J9/28 , Y10S264/16 , Y10S264/18 , Y10S502/514 , Y10S521/905 , Y10T428/249954 , Y10T428/249979 , Y10T428/249995
摘要： An absorbent, microporous foam comprising a crosslinked polymer having interconnected fluid cells distributed throughout its mass, wherein the fluid cells have a diameter of between about 0.1 and about 100 .mu.m, and wherein the foam can rapidly absorb at least about twice its dry weight in fluid, is disclosed.A method for producing a microporous, absorbent foam is also disclosed. This method comprises the steps of:(a) mixing a cross-linkable polymer and a first solvent to form a stable solution, wherein the stable solution can be induced to phase separate;(b) inducing the stable solution to phase separate into a polymer-concentrated phase and a polymer-dilute phase after a predetermined period of time;(c) inducing crosslinking of said polymer, so that the polymer will crosslink in said concentrated phase for a predetermined period of time during phase separation to thereby form a microporous material; and(d) drying the microporous material to produce the absorbent foam.
摘要翻译： 一种吸收性微孔泡沫，其包含交联的聚合物，其具有分布在其整个质量块中的相互连接的流体细胞，其中流体细胞的直径为约0.1至约100μm，并且其中泡沫可以快速吸收其干重至少约两倍的干重 流体。 还公开了一种用于生产微孔吸收泡沫的方法。 该方法包括以下步骤：（a）将可交联聚合物和第一溶剂混合以形成稳定溶液，其中稳定溶液可诱导相分离; （b）在预定时间段之后诱导稳定的溶液相分离成聚合物浓缩相和聚合物稀释相; （c）诱导所述聚合物的交联，使得聚合物在相分离期间在所述浓缩相中交联预定的时间段，从而形成微孔材料; 和（d）干燥微孔材料以产生吸收性泡沫体。
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公开(公告)号：US6030442A
公开(公告)日：2000-02-29
申请号：US737404
申请日：1996-11-08
CPC分类号： C08J3/075 , C08L1/284 , C08J2301/28
摘要： A microporous, cross-linked, reversibly responsive gel obtainable from a polymeric precursor is disclosed. The microporous gels exhibit a volume change response on the order of seconds, many times faster than nonporous volume change gels of similar dimension. A method of making a microporous, fast response and reversibly responsive gel having a defined pore size and defined strut thickness is also disclosed. The method comprises preparing a polymer solution having a certain initial concentration of polymer precursor, initiating phase separation of the polymer to produce a phase separated state; cross-linking the polymer in its phase separated state or cross-linking the polymer prior in its phase separated state, or both prior to and during its phase separated state, for a certain cross-linking reaction time; and allowing gelation to be completed. Particular uses of the fast response gels are also described. In one embodiment, a method for purifying and concentrating a solute from a solution is described. The method includes the steps of contacting a solution containing the solute with the microporous gel of the invention. Next, the gel is swollen to absorb a portion of the solution and exclude the solute by initiating expansion. This results in a concentrated solution of solute and microporous gel swollen primarily with solution lacking solute.
摘要翻译： PCT No.PCT / US94 / 05400 Sec。 371日期：1996年11月8日 102（e）日期1996年11月8日PCT 1994年5月13日PCT PCT。 公开号WO95 / 31498 日期1995年11月23日公开了一种由聚合物前体获得的微孔，交联，可逆响应的凝胶。 微孔凝胶表现出几秒的体积变化响应，比类似尺寸的无孔体积变化凝胶快许多倍。 还公开了制备具有限定的孔径和限定的支柱厚度的微孔，快速响应和可逆响应性凝胶的方法。 该方法包括制备具有一定初始浓度的聚合物前体的聚合物溶液，引发聚合物的相分离以产生相分离状态; 在相分离状态下交联聚合物或在其相分离状态之前交联聚合物，或在其相分离状态之前和期间将聚合物交联，以获得某些交联反应时间; 并允许凝胶化完成。 还描述了快速反应凝胶的特殊用途。 在一个实施方案中，描述了用于从溶液中提纯和浓缩溶质的方法。 该方法包括使含有溶质的溶液与本发明的微孔凝胶接触的步骤。 接下来，凝胶膨胀以吸收溶液的一部分并通过引发膨胀排除溶质。 这导致溶质和微孔凝胶的浓缩溶液主要溶于不溶于溶液的溶液中。
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