用聚碳硅烷制备柔性疏水型碳化硅纤维毡(英文)  

Flexible and Hydrophobic Silicon Carbide Fibrous Mats Prepared from Polycarbosilane

作　　者：余煜玺[1,2] 陈勇[1] 吴晓云[1] 方庆玲[3] 吴小龙[3] 

机构地区：[1]厦门大学材料学院材料科学与工程系福建省特种先进材料重点实验室,福建厦门361005 [2]厦门大学深圳研究院,广东深圳518057 [3]无锡江南计算技术研究所,江苏无锡214083

出　　处：《硅酸盐学报》2014年第5期661-666,共6页Journal of The Chinese Ceramic Society

基　　金：国家自然科学基金(51175444);国家科技重大专项课题(2011ZX02709-002);中央高校(厦门大学)基本科研业务费专项资金(2011121002);航空科学基金(2013ZD68009);新世纪优秀人才支持计划资助(2013);深圳市战略性新兴产业发展专项资金(JCYJ20120618155425009)

摘　　要：以聚合物先驱体转化法用陶瓷工艺与静电纺丝技术相结合制备了碳化硅(SiC)陶瓷纤维毡。以聚碳硅烷为先驱体,利用静电纺丝技术制备先驱体原纤维毡。原纤维毡经过低温交联和1 000℃以上热解,得到SiC纤维毡。当温度达到1 200℃时,纤维毡为多晶态,保持典型的三维网络结构,纤维直径约为1.1mm。电子探针分析表明,纤维毡化学组成为Si、C、以及少量O元素。SiC纤维毡具有良好的疏水性,疏水角大于130°。1 000℃热解制备的SiC纤维毡的拉伸强度为0.6MPa,断裂伸长率为45%,可应用于高温极端环境。Silicon carbide （SiC） fibrous mats were synthesized by polymer-derived ceramic process and electrospinning technique.Polycarbosilane was used as precursors,which was first electrospun into polymeric fibrous mats followed by pyrolysis at ＞1 000 ℃.The crystalline SiC fibrous mats were obtained at 1 200 ℃.The structural observations reveal that the mats exhibit a 3-dimensional structure with the fiber diameter of 1.1 mm.The chemical compositions of the ceramic fibrous mats measured by EPMA are Si,C and a small quantity of oxygen.The SiC fibrous mats show a superior hydrophobic behavior with a water contact angle of ＞130℃.The SiC fibrous mats obtained by pyrolysis at 1 000 ℃ show a yield stress of 0.6 MPa and elongation of 45％ at break.The SiC fibrous mats can be used as a promising material for high temperature harsh environmental applications due to their reasonable mechanical properties and good flexibility.

关 键 词：碳化硅纤维毡 静电纺丝 柔性 疏水性 

分 类 号：TB383[一般工业技术—材料科学与工程] TB302.4