申请人:The Borden Company, Ltd.
公开号:EP0088818A1
公开(公告)日:1983-09-21
An improved immobilized enzyme composite is prepared by subjecting an inorganic carrier material which is essentially chemically inert however hydrolisable by a strong base or a strong acid to give raise to multiple OH groups and which is sufficiently porous or finely divided to give access to the base and the acid and further dissolved reactants to all parts thereof, especially a siliceous carrier to an initial treatment with alkali, then acid, then reacting the carrier with an organosilane. The organosilane may then be coupled through a covalent coupling agent with an enzyme. The alkali-acid treatment provides an exceptionally high number of hydroxyl groups per unit volume, so that the treated carrier is especially useful in the preparation of high performance immobilized enzyme compositions, particularly by multi-layering immobilization, providing a very high amount of enzyme activity per unit volume. Multi-layering is accomplished by successive steps of bonding a difunctional covalent coupling agent to a previously immobilized enzyme layer, then bonding an additional layer of enzyme to the coupling agent. This may be repeated to apply as many layers as desired.
一种改进的固定化酶复合材料的制备方法是将一种无机载体材料,特别是硅质载体,先用碱处理,再用酸处理,然后使载体与有机硅烷反应,这种载体基本上是化学惰性的,但可被强碱或强酸水解,从而产生多个羟基。然后,有机硅烷可通过共价偶联剂与酶偶联。经过碱-酸处理后,单位体积内的羟基数量特别多,因此,经过处理的载体特别适用于制备高性能的固定化酶组合物,尤其是通过多层固定,提供单位体积内极高的酶活性。多层固定是通过连续步骤实现的:将双官能团共价偶联剂粘合到先前固定的酶层上,然后将另一层酶粘合到偶联剂上。可根据需要重复上述步骤,应用任意多层。