Generation of a carbon dots/ammonium persulfate redox initiator couple for free radical frontal polymerization†,Polymer Chemistry

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Generation of a carbon dots/ammonium persulfate redox initiator couple for free radical frontal polymerization†
Polymer Chemistry ( IF 4.1 ) Pub Date : 2017-12-21 00:00:00 , DOI: 10.1039/c7py01969f
Xiang-Yun Du _{1,

2,

3,

4,

5} , Juncai Shen _{1,

2,

3,

4,

5} , Jing Zhang _{1,

2,

3,

4,

5} , Luting Ling _{1,

2,

3,

4,

5} , Cai-Feng Wang _{1,

2,

3,

4,

5} , Su Chen _{1,

2,

3,

4,

5}

Affiliation

We report a new redox initiator couple of ammonium persulfate (APS)/carbon dots (CDs) with high initiation efficiency used in frontal polymerization (FP). The CDs also served as fluorescent reagents, and had good dispersion and a relatively high absolute quantum yield (>60%). The initiation efficiency and possible mechanism of CDs/peroxydisulfate (S₂O₈²⁻) initiators were investigated. The electron transfer between the CDs and S₂O₈²⁻ made decomposition of the latter into free radicals easier. Besides, electron transfer occurred between the CDs and vinyl monomers, prompting the CDs to be applied to initiate monomers alone. Therefore, the combined effects of the CDs and APS made vinyl monomers more prone to be triggered in FP, thereby lowering the reaction temperature considerably. This research might provide a promising avenue to discover other polymerization initiators with high efficiency for the synthesis of versatile materials.

中文翻译：

生成碳点/过硫酸铵氧化还原引发剂对，用于自由基正面聚合†

我们报道了一种新的氧化还原引发剂对，过硫酸铵（APS）/碳点（CD）具有很高的引发效率，可用于额叶聚合（FP）。CD也用作荧光试剂，并具有良好的分散性和相对较高的绝对量子产率（> 60％）。研究了CDs /过氧二硫酸盐（S ₂ O ₈^2-）引发剂的引发效率和可能的机理。CD与S ₂ O ₈^2-之间的电子转移使后者更容易分解为自由基。此外，CD和乙烯基单体之间发生电子转移，促使CD单独用于引发单体。因此，CD和APS的共同作用使得乙烯基单体更易于在FP中被触发，从而大大降低了反应温度。这项研究可能为发现高效合成通用材料的其他聚合引发剂提供了一条有希望的途径。

更新日期：2017-12-21

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