發(fā)布時間：2018-03-09 17:22

  本文選題：金屬離子　切入點：水凝膠　出處：《復合材料學報》2017年07期 　論文類型：期刊論文

【摘要】：使水凝膠同時具備高強度和自修復性能,采用"一鍋法"制備了多價金屬離子Ca~(2+)、Al~(3+)、Fe~(3+)增強瓊脂(Agar)-聚丙烯酸(PAAc)復合雙網絡水凝膠Ca~(2+)/Agar-PAA、Al~(3+)/Agar-PAA和Fe~(3+)/Agar-PAAc雙網絡水凝膠。研究不同多價金屬離子對Agar-PAAc雙網絡水凝膠的增強作用及Fe~(3+)/Agar-PAAc的自修復自愈合性能。結果表明,Fe~(3+)/Agar-PAAc的拉伸強度(320.7kPa)和斷裂伸長率(1 130%)分別為Ca~(2+)/Agar-PAAc的12倍和9倍,Fe~(3+)/Agar-PAAc的斷裂伸長率與Al~(3+)/Agar-PAAc相當,但拉伸強度為Al~(3+)/Agar-PAAc的5倍。對樣品實施定應變拉伸使內部發(fā)生破壞,被破壞的Fe~(3+)/Agar-PAAc在Fe~(3+)溶液中浸泡30 min,修復率達到100%。被破壞的Fe~(3+)/Agar-PAAc在50℃環(huán)境中處理15min,修復率達到100%。切斷的Fe~(3+)/Agar-PAAc凝膠斷面被固定在一起,在密封環(huán)境中放置48小時,試樣斷面可自愈合,且可拉伸至約8倍初始長度。Fe~(3+)/AgarPAAc雙網絡水凝膠具有優(yōu)異力學性能和自修復性能,不施加溫度、化學物質等外界刺激,實現(xiàn)兩重網絡均具有自修復性能的效果。
[Abstract]:Hydrogels have both high strength and self-repairing properties. The polyvalent metal ions Ca~(2 / Agar-PAA / Ca~(2 / Agar-PAA / Agar-PAA / Agar-PAA / Fe~(3 / Agar-PAAc double network hydrogels were prepared by one-pot method. The effects of different multivalent metal ions on Agar-PAAc double-network hydrogels were studied. The results showed that the tensile strength and elongation at break of Fe~(3 / Agar-PAAc were 12 and 9 times of that of Ca~(2 / Agar-PAAc, respectively, and the elongation at break of Agar-PAAc was equal to that of Al~(3 / Agar-PAAc. But the tensile strength is 5 times higher than that of Al~(3 / Agar-PAAc. The damaged Fe~(3 / Agar-PAAc was immersed in the Fe~(3 solution for 30 minutes, and the repair rate reached 100. The damaged Fe~(3 / Agar-PAAc was treated at 50 鈩，

本文編號：1589512