摘要
依据石英纤维(QF)与含硅芳炔树脂(PSA)的结构特点,设计合成了一种新的含炔基硅烷偶联剂AS-1。将QF经丙酮抽提后用AS-1进行表面处理,与PSA复合制备了QF-PSA复合材料。通过原子力显微镜(AFM)、X-射线光电子能谱(XPS)、扫描电镜(SEM)等分析测试手段研究了偶联剂的界面改性效果和机理。分析表明:QF经AS-1处理后,其表面粗糙度增大,丙酮抽提使纤维表面暴露的Si—OH基增多,与AS-1中的Si—OH水解形成Si—O—Si键;经表面处理后的石英纤维与含硅芳炔树脂复合后,AS-1结构中的炔基与含硅芳炔树脂中的炔基在热压成型时固化交联,改善了复合材料的界面黏接。复合材料的层间剪切强度比未经处理的提高了25.3%。
A new coupling agent alkynyl-containing silicone （AS-1） was designed and prepared considering the chemical structures of the matrix and the reinforcement. The quartz fibers （QF） were extracted by acetone followed with treatment by the coupling agent AS-1, and then composited silicon-arylacetylenecontaining resin （PSA） to prepare QF reinforced PSA matrix （QF-PSA） laminate. The interracial modification effect and mechanism of QF-PSA composites with the treatment by QF were characterized and studied with atom force microscope （AFM）, X-ray photoeletron spectroscopy （XPS）, and scanning electron microscope （SEM）. The results suggested that AS 1 increased the surface roughness of the fiber, extraction removed the sizing agent and more Si--OH groups exposed on the surface of the fiber, which formed Si-O-Si with AS-1 via hydrolysis. Alkynyl groups in the coupling agent AS-1 cured and crosslinked with PSA during moulding, which leading to the enhancement of the interracial bonding strength. The interlaminar shear strength （ILSS） of treated QF-PSA composites improved almost by 25.3% compared with those of untreated samples.
出处
《功能高分子学报》
CAS
CSCD
北大核心
2013年第3期280-288,共9页
Journal of Functional Polymers
基金
国家自然科学基金(51073054)
关键词
界面改性
石英纤维
含硅芳炔
含炔基硅烷偶联剂
interracial modification
quartz fiber
silicon arylacetylene-containing resin
alkynyl containingsilicone coupling agent
