聚氨酯-聚丙烯酰胺复合荧光水凝胶的合成及其性能研究
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O631.5

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Synthesis and properties of polyurethane-polyacrylamide composite fluorescence hydrogels
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    摘要:

    以不同相对分子质量聚乙二醇为软段,引入N,N-二羟乙基苯胺-β-三联吡啶(TPPDA)荧光分子,原位聚合制备了不同相对分子质量聚乙二醇的荧光水性聚氨酯(FWPU1~3);将不同量丙烯酰胺(AM)引入FWPU中,制备了一系列聚氨酯-聚丙烯酰胺复合荧光水凝胶(FWPUH1~6)。采用FTIR、固体紫外吸收和荧光光谱分别表征测试了TPPDA和FWPUH的结构及其荧光性能。结果表明,相比TPPDA,FWPUH的主要紫外吸收峰发生红移,最大荧光发射波长蓝移,荧光量子产率增加,荧光发射强度明显增加;且随着软段PEG相对分子质量的增大以及AM加入量的增加,FWPUH荧光强度增大。当软段为PEG4000,FWPU和AM质量比为5:4(FWPUH6)时,荧光强度最大,与TPPDA相比,荧光强度增加了9.5倍,荧光量子产率也提升了56%。FWPUH3达到最大平衡溶胀比,为9.95;FWPUH2的压缩强度最大(0.70 MPa);FWPUH2和FWPUH5的软段玻璃化转变温度和硬段玻璃化转变温度分别为-32.1、-46.0 ℃和96.5和105.7 ℃。

    Abstract:

    Fluorescent waterborne polyurethane(FWPU1~3) with different molecular weight polyethylene glycol was prepared by in situ polymerization of N,N-dihydroxyethylaniline-β-terpyridine (TPPDA) as fluorescent molecules; different amounts of acrylamide (AM) were introduced into FWPU to prepare a series of polyurethane-polyacrylamide complex fluorescent hydrogels (FWPUH1~6). The structure and fluorescence properties of TPPDA and FWPUH were tested by FTIR, solid UV absorption and fluorescence spectroscopy. The results show that the main UV absorption peak of FWPUH is red shift compared with TPPDA, the maximum fluorescence emission wavelength was blue-shifted, the fluorescence quantum yield increases, and its fluorescence emission intensity increases obviously; with the increase of PEG molecular weight and the increase of AM content, the fluorescence intensity of FWPUH increased. When the soft segment was PEG4000, mass ratio of FWPU and AM were 5:4(FWPUH6), the fluorescence intensity was the largest, and compared with TPPDA, the fluorescence intensity increased by 9.5 times, fluorescence quantum yield also increased by 56%. FWPUH3 reached the maximum equilibrium swelling ratio of 9.95; FWPUH2 had the highest compressive strength (0.70 MPa); the soft glass transition temperature and hard glass transition temperature of FWPUH2 and FWPUH5 were -32.1, -46.0 ℃ and 96.5 and 105.7 ℃.

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张良良.聚氨酯-聚丙烯酰胺复合荧光水凝胶的合成及其性能研究[J].精细化工,2018,35(11):0

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  • 收稿日期:2017-09-17
  • 最后修改日期:2018-01-10
  • 录用日期:2018-01-30
  • 在线发布日期: 2018-09-05
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