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本文介绍一种加成交链方法制备交链毛细管柱,此方法采用端基含乙烯基的低分子量的甲基乙烯基硅油和含氢硅油在微量铂催化剂作用下室温加成,交链同时伴有链增大,使低分子量硅油交链并聚合形成高热稳定性的硅弹性体。 玻璃毛细管柱采用氟化氢铵蚀刻法进行表面粗糙化,玻璃表面钝化采用六甲基二氨硅烷(HDMS)和含氢硅油钝化方法并收到了较好的效果。采用此方法制备出的玻璃毛细管柱,非极性、中极性柱理论板数高达4000块/m,并可在320℃～340℃下程序升温使用,氰乙基硅橡胶柱程序升温可到260℃,经Grob混合物评价,吸附较小,是一种低流失,耐高温、液膜不可抽提的高效柱。
In this paper, a method of addition and cross-linking to prepare cross-linked capillary column is introduced. This method uses low molecular weight methyl vinyl silicone oil containing terminal vinyl group and hydrogen-containing silicone oil to add room temperature at a trace amount of platinum catalyst. Chain increases, the low molecular weight silicone oil cross-linked and polymerized to form a high thermal stability of silicone elastomer. Glass capillary column using ammonium bifluoride etching surface roughening, glass surface passivation using hexamethyldisilane (HDMS) and hydrogenated silicone oil passivation method and received good results. The glass capillary column prepared by this method has a theoretical plate number of nonpolar and medium polarity columns of up to 4,000 pieces / m and can be programmed to be used at a temperature of 320 ° C to 340 ° C. The temperature of the cyanoethyl silicone rubber column can be increased to 260 ℃, the evaluation by Grob mixture, adsorption is small, is a low loss, high temperature, the membrane can not be extracted highly efficient column.