PDEGMA-b-POVNGA@AuNPs的制备及表征
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国家自然科学基金(21303014)


Preparation and Characterization of PDEGMA-b-POVNGA@AuNPs
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    摘要:

    以6-O-乙烯基己二酸-D-吡喃型半乳糖(OVNGA)和温敏性的二聚乙二醇单甲醚甲基丙烯酸甲酯(DEGMA)作为单体,采用酶促法、可逆加成-断裂链转移自由聚合法(RAFT) )和“一锅法”联用,制备了具有温敏性的含半乳糖基的新型PDEGMA-b-POVNGA@AuNPs复合物。该复合物通过温敏性糖基嵌段共聚物PDEGMA-b-POVNGA和金纳米粒子( AuNPs)以S—Au键键合,将聚合物接枝到纳米金粒子表面。通过1HNMR、 FTIR和 GPC对PDEGMA-b-POVNGA进行结构表征。变温UV-vis对PDEGMA-b-POVNGA进行温敏性验证。结果表明:其低临界温度(LCST)约为35 ℃。DLS结果显示:AuNPs平均粒径为25nm。PDEGMA-b-POVNGA@AuNPs复合物通过TEM进行形貌表征,结果表明:PDEGMA-b-POVNGA接枝到金纳米粒子表面;变温紫外-可见光光谱结果表明:PDEGMA-b-POVNGA@AuNPs的LCST约为34.5 ℃。PDEGMA-b-POVNGA @AuNPs复合物有望应用于靶向药物载体领域。

    Abstract:

    The PDEGMA-b-POVNGA@AuNPs complex was prepared by a combination of enzymatic synthesis , reversible addition-fragment chain transfer (RAFT) polymerization protols and the “one-pot”method. The targeted glycomonomer 6-O-vinyladipoyl-α-D-galactose (OVNGA) and thermoresponsive diethyleneglycol methacrylate (DEGMA) as the monomers to form PDEGMA-b- POVNGA, the thermoresponsive glycopolymer. Then the PDEGMA-b-POVNGA combined with gold nanoparticals(AuNPs) to prepared PDEGMA-b-POVNGA@AuNPs complex by S—Au bond. The structure of PDEGMA-b-POVNGA was characterized by 1HNMR, FTIR and GPC. UV-visible spectroscopy tests showed that the low critical solution temperature (LSCT) of PDEGMA-b-POVNGA is about 35 ℃. Dynamic light scattering (DLS) demonstrated that the average diameter of AuNPs is 25nm. The PDEGMA-b-POVNGA@AuNPs complex was characterized by TEM. The result proved that the block polymer has grafted in the surface of AuNPs. UV-visible spectroscopy tests showed that the LSCT of PDEGMA-b-POVNGA@AuNPs is about 34.5 ℃. PDEGMA-b-POVNGA@AuNPs may have potential as functional drug carriers.

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邵栋杰,权静. PDEGMA-b-POVNGA@AuNPs的制备及表征[J].精细化工,2017,34(3):

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  • 收稿日期:2016-07-20
  • 最后修改日期:2016-10-11
  • 录用日期:2016-12-07
  • 在线发布日期: 2017-02-09
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