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发明公开
CN103938296A 一种一锅法制备SiBN(C)陶瓷纤维前驱体的方法 有权

一种一锅法制备SiBN(C)陶瓷纤维前驱体的方法
摘要：
本发明涉及一种一锅法制备SiBN(C)陶瓷纤维前驱体的方法，包括：甲基二氯硅烷、三氯化硼、甲胺及溶剂无水正己烷，在-30～-10℃下，合成SiBN(C)陶瓷纤维前驱体分子的无水正己烷溶液；在70～120℃下，除去前驱体分子溶液中的正己烷，然后加入活性基团封端的聚二甲基硅氧烷，升温至140-300℃，保温5-150h，得到SiBN陶瓷纤维前驱体聚合物，经过脱泡后进行熔融纺丝，即得。本发明与现有的合成方法相比，工艺简单，便于操作，通过一步反应即可完成前驱体的制备；本发明可有效解决SiBN(C)陶瓷纤维前驱体的脆性，为SiBN(C)陶瓷纤维前驱体的连续制备及裂解奠定了基础。
摘要（英）：

The invention relates to a method for preparation of an SiBN(C) ceramic fiber precursor by a one-pot technique. The method includes: at a temperature ranging from -30DEG C to -10DEG C, synthesizing an anhydrous n-hexane solution of an SiBN(C) ceramic fiber precursor molecule from dichloromethylsilane, boron trichloride, methylamine and a solvent anhydrous n-hexane; under 70-120DEG C, removing n-hexane from the precursor molecule solution, then adding active group terminated polydimethyl siloxane, raising the temperature to 140-300DEG C, conducting heat preservation for 5-150h to obtain an SiBN ceramic fiber precursor polymer, and carrying out defoaming and melt spinning, thus obtaining the SiBN(C) ceramic fiber precursor. Compared with the existing synthesis methods, the method has the advantages of simple process and convenient operation, and preparation of the precursor can be completed by one-step reaction. The method provided by the invention can effectively solve the brittleness problem of the SiBN(C) ceramic fiber precursor, thus laying the foundation for continuous preparation and cracking of the SiBN(C) ceramic fiber precursor.

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