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石墨烯量子点-TiO2/聚丙烯酰胺荧光水凝胶的制备与性能

杜娟 田洪莉 何雨璇 张超 佘小红 朱雯莉 杨巧玲

杜娟, 田洪莉, 何雨璇, 等. 石墨烯量子点-TiO2/聚丙烯酰胺荧光水凝胶的制备与性能[J]. 复合材料学报, 2024, 41(4): 1968-1976. doi: 10.13801/j.cnki.fhclxb.20230831.001
引用本文: 杜娟, 田洪莉, 何雨璇, 等. 石墨烯量子点-TiO2/聚丙烯酰胺荧光水凝胶的制备与性能[J]. 复合材料学报, 2024, 41(4): 1968-1976. doi: 10.13801/j.cnki.fhclxb.20230831.001
DU Juan, TIAN Hongli, HE Yuxuan, et al. Preparation and properties of GQDs-TiO2/polyacrylamide fluorescent hydrogel[J]. Acta Materiae Compositae Sinica, 2024, 41(4): 1968-1976. doi: 10.13801/j.cnki.fhclxb.20230831.001
Citation: DU Juan, TIAN Hongli, HE Yuxuan, et al. Preparation and properties of GQDs-TiO2/polyacrylamide fluorescent hydrogel[J]. Acta Materiae Compositae Sinica, 2024, 41(4): 1968-1976. doi: 10.13801/j.cnki.fhclxb.20230831.001

石墨烯量子点-TiO2/聚丙烯酰胺荧光水凝胶的制备与性能

doi: 10.13801/j.cnki.fhclxb.20230831.001
基金项目: 四川省科技计划项目(2022JDRC0090)
详细信息
    通讯作者:

    杜娟,博士,讲师,硕士生导师,研究方向为高强度水凝胶的设计合成及性能、有机无机纳米复合材料的制备及功能化 E-mail: dujuan@suse.edu.cn

  • 中图分类号: TB332

Preparation and properties of GQDs-TiO2/polyacrylamide fluorescent hydrogel

Funds: Sichuan Science and Technology Program (2022JDRC0090)
  • 摘要: 通过将原位溶胶-凝胶法和自由基聚合法巧妙相结合制备了一种坚固、荧光的杂化水凝胶石墨烯量子点-TiO2/聚丙烯酰胺(GQDs-TiO2/PAM)。在该杂化水凝胶中,同时充当多功能交联剂和纳米填料的TiO2和GQDs粒子与水凝胶网络中的亲水基团通过氢键等非共价键牢固地结合。PAM、TiO2和GQDs之间的强非共价键作用赋予该凝胶优异的力学性能。GQDs-TiO2/PAM (0.5wt%GQDs)水凝胶的断裂伸长率和抗拉强度分别高达2412%和181 kPa,为TiO2/PAM水凝胶的1.78和1.13倍。另外,GQDs的引入还赋予该复合水凝胶特殊的荧光性能,它能够在365 nm紫外光照射下发出明显的蓝色荧光。因此,该水凝胶在生物医药、重金属离子检测、荧光探针等领域有很大发展潜力。

     

  • 图  1  (a) GQDs-TiO2/聚丙烯酰胺(PAM)杂化水凝胶的形成过程示意图;TiO2溶胶(b)、AM-TiO2分散液(c)、AM-GQDs-TiO2分散液(d)及水凝胶(e)的照片

    Figure  1.  (a) Schematic diagram for the preparation of GQDs-TiO2/polyacrylamide (PAM) hybrid hydrogel; Photographs of TiO2 hydrosol (b), AM-TiO2 dispersion (c), AM-GQDs-TiO2 dispersion (d) and hydrogel (e)

    图  2  GQDs-TiO2/PAM杂化水凝胶(1wt%GQDs)的SEM图像

    Figure  2.  SEM image of the GQDs-TiO2/PAM hybrid hydrogels (1wt%GQDs)

    图  3  GQDs和TiO2/PAM、GQDs/PAM、GQDs-TiO2/PAM(1wt%GQDs) 水凝胶的FTIR图谱

    Figure  3.  FTIR spectra of GQDs, TiO2/PAM, GQDs/PAM, andGQDs-TiO2/PAM hydrogels (1wt%GQDs)

    图  4  GQDs-TiO2/PAM杂化水凝胶(1wt%GQDs)力学性能图片:(a) 交叉和拉伸;(b) 打结和拉伸;(c) 压缩和释放

    Figure  4.  Photographs of GQDs-TiO2/PAM hybrid hydrogels (1wt%GQDs) under external forces: (a) Cross-bended and stretched; (b) Knotted and stretched; (c) Compressed and released

    图  5  PAM、TiO2/PAM和GQDs-TiO2/PAM水凝胶拉伸应力-应变曲线 (GQDs含量为0wt%、0.5wt%、1wt%、3wt%)

    Figure  5.  Tensile stress-strain curves of PAM, TiO2/PAM and GQDs-TiO2/PAM hydrogels (GQDs contents are 0wt%, 0.5wt%, 1wt%, 3wt%)

    图  6  GQDs/PAM、TiO2/PAM及GQDs-TiO2/PAM (1wt%GQDs) 水凝胶的TG (a)和DTG (b)曲线

    Figure  6.  TG (a) and DTG (b) curves of GQDs/PAM, TiO2/PAM, and GQDs-TiO2/PAM (1wt%GQDs) hydrogels

    图  7  GQDs-TiO2/PAM杂化水凝胶(1wt%GQDs)在365 nm紫外光下的光致发光照片(a)和荧光图谱(b)

    Figure  7.  Photoluminescence photos (a) and fluorescence spectrum (b) of GQDs-TiO2/PAM (1wt%GQDs) hybrid hydrogels under 365 nm UV light

    图  8  TiO2/PAM、GQDs/PAM和GQDs-TiO2/PAM水凝胶薄膜覆盖的不同浓度亚甲基蓝溶液 (0.01wt‰和0.004wt‰)紫外光照前后的吸收光谱

    Figure  8.  Absorption spectra of methylene blue solutions (0.01wt‰ and 0.004wt‰) with different concentrations covered by TiO2/PAM, GQDs/PAM and GQDs-TiO2/PAM hydrogel films before and after ultraviolet irradiation, respectively

    表  1  不同石墨烯量子点(GQDs)含量水凝胶的配方

    Table  1.   Formula of hydrogels with different contents of graphene quantum dot (GQDs)

    HydrogelTEOA/gTBOT/µLAM/gGQDs/wt%BIS (0.1wt%, mL)APS/g
    PAM2.520.08
    GQDs/PAM2.5120.08
    TiO2/PAM0.17562002.520.08
    GQDs-TiO2/PAM0.17562002.50.520.08
    GQDs-TiO2/PAM0.17562002.5120.08
    GQDs-TiO2/PAM0.17562002.5320.08
    GQDs-TiO2/PAM0.17562002.5520.08
    Notes: TEOA—Triethanolamine; TBOT—Tetrabutyl titanate; AM—Acrylamide; BIS—N, N'-methylenebis(2-propenamide); APS—Ammo-nium persulphate; PAM—Polyacrylamide.
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出版历程
  • 收稿日期:  2023-06-21
  • 修回日期:  2023-08-16
  • 录用日期:  2023-08-18
  • 网络出版日期:  2023-08-31
  • 刊出日期:  2024-04-15

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