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玉米淀粉进入医疗应用 - China Medical Device Manufacturer
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Wed, January 17th, 2018

2009年4月CMDM电子快讯 » 技术新知
玉米淀粉进入医疗应用

By: Bob Michaels

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医用Reon淀粉聚合物具有液体管理能力、可持续性和生物降解性。

厨师和面包师了解玉米淀粉可以用于制作各种食品,从肉汁和调味汁到蛋糕和派等等。但玉米淀粉还可作为高吸收性聚合物的原料,用于控制各种医疗产品中的水分和其它液体。

Absorbent Technologies 公司(美国俄勒冈州,Beaverton;www.reon.com)以淀粉为原料开发的Reon聚合物可用于绷带和伤口敷料,同以石油为原料的聚合物或合成性高吸水性聚合物相比具有很多优势,包括液体管理能力、可持续性和生物降解性。Reon产品经理David Westlund指出:“大多数合成物质都能吸收液体,但其结合液体的方式使它们很难重新锁住或管理液体。”

Reon不但可维持又可释放水分。这种低膨胀材料可锁住其自身重量500倍的水分,具有一种由柔软、不溶性的聚合物链形成的交联网状结构。这些链通过扩散和分子引力可以锁住大量水分,并能在受到外部压力的情况下释放。Westlund表示:“Reon可以在使用过程中不断重复进行这一过程。该特性令其与大多数合成物质截然不同。”

Westlund称,由于这种液体管理特性使其可在潮湿和干燥之间维持适当的平衡,因此该聚合物可用于绷带、伤口敷料,帮助加快愈合过程,减少疤痕。Reon还可用于外科吸附剂、吸附粉末、吸收垫和冷热敷袋。

尽管任何一种淀粉都可用来制造淀粉类聚合物,但综合其可用性、价格以及形成之产品的一致性和质量等因素,Reon采用的是未糊化的玉米淀粉。材料的大小从8目(约2400m)的颗粒到200目(约74m)的粉末。医疗应用中,颗粒或粉末越小越好。由于医疗产品通常直接与皮肤接触,因此其配方多选择钠,而非钾。

Westlund 特别宣扬了Reon的“绿色环保”特点,他说:“未水化的颗粒或粉末结构使其极为稳定并可维持多年。而一旦水化,其降解过程主要取决于微生物的活性。废弃处理这些产品时,你会发现它们通常只需六到九个月即可完全降解。”他还补充表示,这些材料只要不吸收有害物质,就可在堆肥或土壤中安全存在直至降解。此外,Reon采用蒸馏柱制成,因此在干馏过程中,99.5%的材料可循环使用。事实上,唯一的副产品是氨气,但它们可通过再回收转化为磷酸铵,用作肥料。


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