本文關(guān)鍵詞： 玻璃纖維 改性淀粉 成膜劑 乙烯基酯樹脂 界面性能　出處：《西南科技大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

【摘要】：玻璃纖維是一種常見的無機非金屬材料,因其強度高、抗腐蝕性強、絕緣性好等獨特的性能,常常被用作增強體來制備復(fù)合材料。但是,由于它的表面光滑且不耐摩擦,在應(yīng)用時常有飛絲的現(xiàn)象產(chǎn)生。對于制得的玻纖復(fù)材,盡管它的性能有了顯著地提高,但界面處的結(jié)合強度較低,容易成為應(yīng)力集中源遭到破壞,進而影響復(fù)合材料整體的性能。本論文以淀粉為原料,通過改性處理,研究了將改性淀粉作為成膜劑的綜合性能;并將其用于玻纖浸潤,制備玻纖復(fù)材,以此檢驗復(fù)合材料的界面性能。運用FT-IR、NMR、粘度計、表面張力儀、接觸角測試儀等手段表征了改性淀粉成膜劑及浸潤型紗線的性能。此外,還通過力學(xué)性能測試、SEM、熱分析等方法考察了玻纖與乙烯基酯樹脂(VE)的界面相容性。主要研究內(nèi)容及結(jié)果如下:通過烯丙基縮水甘油醚對淀粉的化學(xué)改性,確定其最佳的制備條件為:AGE含量15%、NaOH含量7.5%、反應(yīng)溫度95℃、反應(yīng)時間10h。在這種條件下,改性淀粉成膜劑對玻纖的浸潤效果明顯優(yōu)于原淀粉乳液,經(jīng)拉絲浸潤后,紗線的力學(xué)性能及硬挺度也顯著提高。使用4-乙烯基環(huán)氧環(huán)己烷對淀粉做改性處理,制備了一系列的改性淀粉成膜劑。結(jié)果顯示,當(dāng)4-乙烯基環(huán)氧環(huán)己烷含量為10%、NaOH含量為4%、反應(yīng)溫度為95℃、反應(yīng)時間為12h時,制得的改性淀粉成膜劑和浸潤型紗線的綜合性能優(yōu)異。選用玻纖原絲及不同種類的浸潤型紗線增強乙烯基酯樹脂,研究了玻纖復(fù)材的界面性能。結(jié)果表明,經(jīng)過兩種改性淀粉成膜劑浸潤的玻纖,其玻纖復(fù)材的界面結(jié)合強度和力學(xué)性能優(yōu)于玻纖原絲及原淀粉型的復(fù)材。這主要是因為玻纖表面的碳碳雙鍵活性基團可以參與樹脂基體內(nèi)的共聚反應(yīng),加強了二者的界面黏附。綜上所述,我們對淀粉進行改性后,將其用于玻纖浸潤中,并制備了玻纖復(fù)材。通過這樣的處理,復(fù)材的界面結(jié)合強度有很大提高。
[Abstract]:Glass fiber is a common inorganic nonmetallic material, because of its high strength, strong corrosion resistance, good insulation and other unique properties, it is often used as reinforcements to prepare composite materials. Because of its smooth surface and non-friction resistance, there is often a phenomenon of flying wire in application. Although the properties of the glass fiber composites have been significantly improved, the bonding strength at the interface is low. It is easy to be a stress concentration source and then affect the properties of composite materials. In this paper, the comprehensive properties of modified starch as film forming agent were studied by using starch as raw material and modification treatment. The interfacial properties of the composites were tested by using FT-IRN MR, viscometer and surface tension meter. The properties of modified starch film-forming agent and wetted yarn were characterized by means of contact angle tester. In addition, the mechanical properties of modified starch film forming agent and wetted yarn were also tested by SEM. The interfacial compatibility of glass fiber and vinyl ester resin (VEV) was investigated by thermal analysis. The main contents and results were as follows: the chemical modification of starch by allyl glycidyl ether. The optimum preparation conditions were determined as follows: 1% age content 15% NaOH content 7.5%, reaction temperature 95 鈩，

本文編號：1455373