【摘要】：以含氫聚甲基硅氧烷(PHMS)為基礎(chǔ)原料和果殼粉為造孔劑,以四甲基四乙烯基環(huán)四硅氧烷(D4Vi)為交聯(lián)劑、聚二甲基硅氧烷(PDMS)為裂紋抑制劑和Pt絡(luò)合物為催化劑,通過(guò)熱交聯(lián)和在氮?dú)鈿夥罩袩峤夤に囍苽銼iOC多孔陶瓷。采用DSC、XRD、SEM和BET等檢測(cè)方法,研究了交聯(lián)體熱解的演變過(guò)程,以及熱解溫度和造孔劑添加量等因素對(duì)SiOC陶瓷物相組成,顯微形貌,比表面積和氣孔率等影響規(guī)律。結(jié)果表明,在熱解溫度為600-1000℃范圍,制備的SiOC多孔陶瓷為無(wú)定形(非晶)態(tài),孔徑分布50 nm-300 nm,氣孔率為5.75-19.33%。當(dāng)熱解溫度為800℃時(shí),未加造孔劑的SiOC陶瓷比表面積為40.46 m~2/g、氣孔率為9.45%;添加15%造孔劑的SiOC陶瓷比表面積86.49 m~2/g、氣孔率為19.33%。
[Abstract]:Polymethylsiloxane (PHMS) containing hydrogen was used as raw material and shell powder as pore making agent, tetramethyl tetravinylcyclotetrasiloxane (D4Vi) as crosslinking agent, polydimethylsiloxane (PDMS) as crack inhibitor and Pt complex as catalyst. SiOC porous ceramics were prepared by thermal crosslinking and pyrolysis in nitrogen atmosphere. The evolution process of cross-linking pyrolysis and the influence of pyrolysis temperature and the amount of pore-making agent on the phase composition, morphology, specific surface area and porosity of SiOC ceramics were studied by DSC,XRD,SEM and BET. The results show that the SiOC porous ceramics are amorphous (amorphous) at the pyrolysis temperature of 600-1000 鈩，

本文編號(hào)：2248498