PNIPAM/锂藻土/氧化石墨烯近红外光响应水凝胶的制备及其应用初探
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西南民族大学研究生创新型科研项目


Preparation and preliminary study on application of PNIPAM/Laponite/graphene oxide near-infrared light responsive hydrogel
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    摘要:

    以锂藻土(Laponite)为交联剂、氧化石墨烯(GO)为光热转换试剂,通过N-异丙基丙烯酰胺(NIPAM)原位聚合,制备近红外光(NIR)响应水凝胶(Laponite-PNIPAM/GO)。首先考察Laponite的含量对Laponite-PNIPAM水凝胶的断裂伸长率和断裂强度的影响,并考察GO含量对Laponite-PNIPAM/GO水凝胶相关性能的影响,来确定Laponite和GO的合适含量。随后对所制备的水凝胶体积相转变温度(VPTT)及NIR响应性进行表征,并对Laponite-PNIPAM/GO水凝胶在光控流体开关及光控脱附方面的应用进行了初步探索。结果表明:Laponite-PNIPAM/GO水凝胶具有较高强度和良好的韧性, 断裂伸长率可达1100%以上,Laponite-PNIPAM/GO水凝胶的VPTT在36 ℃左右;NIR照射下,Laponite-PNIPAM/GO水凝胶能在3分钟内从20.3 ℃升温至48.5 ℃;由于Laponite-PNIPAM/GO水凝胶具有温敏性和光热效应,其具有作为光控流体开关及光控脱附的潜力。

    Abstract:

    Laponite as crosslinking agent, graphene oxide (GO) as photothermal conversion reagent, near-infrared light (NIR) responsive hydrogel (Laponite-PNIPAM/GO) was prepared by insitu N-isopropylacrylamide (NIPAM) polymerization. Firstly, the effects of the content of Laponite on the breaking elongation and tensile strength of Laponite-PNIPAM hydrogel were investigated, and the influence of GO content on the mechanical properties of Laponite-PNIPAM/GO hydrogel were investigated to determine the appropriate content of Laponite and GO. Subsequently, thevolume phase transition temperature (VPTT) and NIR responsiveness of the prepared hydrogel were characterized, and the application of Laponite-PNIPAM/GO hydrogel in light-controlled fluid switch and light-controlled desorption was preliminary explored. The results show that: Laponite-PNIPAM/GO hydrogel has high strength and good toughness, the elongation at break can reach over 1100%, and the VPTT of Laponite-PNIPAM/GO hydrogel was about 36 ℃; under NIR irradiation, Laponite-PNIPAM/GO hydrogel can be heated from 20.3 ℃ to 48.5 ℃ within 3 minutes; due to Laponite-PNIPAM/GO hydrogel has temperature sensitivity and photothermal effect, and it has the potential as light-controlled adhesion reagent and fluid switch.

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阿尔普丁·艾尼娃尔,王鸿月,孟小琪,何新宇,杨霜,余海溶,左芳. PNIPAM/锂藻土/氧化石墨烯近红外光响应水凝胶的制备及其应用初探[J].精细化工,2021,38(4):0

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  • 收稿日期:2020-11-01
  • 最后修改日期:2021-01-29
  • 录用日期:2021-02-01
  • 在线发布日期: 2021-03-01
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