Facile synthesis of photoluminescent inorganic–organic hybrid carbon dots codoped with B and N: towards an efficient lubrication additive,Dalton Transactions

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Facile synthesis of photoluminescent inorganic–organic hybrid carbon dots codoped with B and N: towards an efficient lubrication additive
Dalton Transactions ( IF 3.5 ) Pub Date : 2017-08-30 00:00:00 , DOI: 10.1039/c7dt02389h
Yunxiao Zhang _{1,

2,

3,

4,

5} , Tao Cai _{5,

6,

7,

8} , Wangji Shang _{1,

2,

3,

4,

5} , Dan Liu _{5,

6,

7,

8} , Qiang Guo _{1,

2,

3,

4} , Shenggao Liu _{5,

6,

7,

8}

Affiliation

A novel environmentally friendly bis-functional dicationic ionic liquid containing chelated orthoborate was synthesized and polycondensed with glutamic acid in order to synthesize inorganic–organic carbon dots (CD/IL) consisting of an ionic liquid moiety inserted in the carbon skeleton. The obtained CD/IL was found to be a new kind of nitrogen/boron-codoped nanomaterial, one with a mean particle diameter of 2.66 nm. CD/IL was verified to be a high-performance lubricant additive: in particular, the anti-wear and friction-reducing properties of poly(ethylene glycol) (PEG) were improved by 89.34% and 62.18%, respectively, when 1% CD/IL was added. Lubricants consisting of a mixture of CD/IL and PEG showed intense blue photo-fluorescence, and the corresponding photoluminescence (PL) intensity decreased considerably after carrying out a tribo-test. Moreover, CD/IL became transferred onto a rubbing steel interface during the tribo-test according to EDX and Raman analyses of a worn surface. CD/IL showed poor crystallinity, and interestingly, an intense G (∼1600 cm⁻¹) signature was detected on the steel surface after a high-load and long-duration tribo-test, which indicated that ordered carbon materials were generated on the interface, inhibiting the undesirable wear.

中文翻译：

轻松合成B和N共掺杂的光致发光无机-有机杂化碳点：形成高效润滑添加剂

为了合成由插入碳骨架中的离子液体部分组成的无机-有机碳点（CD / IL），合成了一种新型的含有螯合原硼酸酯的环保型双功能离子型离子液体，并与谷氨酸缩聚。发现所获得的CD / IL是一种新型的氮/硼共掺杂的纳米材料，其平均粒径为2.66nm。CD / IL被证明是一种高性能的润滑剂添加剂：特别是，当CD为1％时，聚乙二醇（PEG）的抗磨性和降低摩擦的性能分别提高了89.34％和62.18％。 / IL已添加。由CD / IL和PEG的混合物组成的润滑剂显示出强烈的蓝色光致荧光，并且在进行摩擦试验后相应的光致发光（PL）强度大大降低。此外，根据磨损表面的EDX和拉曼分析，在摩擦试验期间，CD / IL转移到了摩擦钢界面上。CD / IL显示出较差的结晶度，有趣的是，强烈的G（〜1600 cm在高负荷和长时间的摩擦试验后，在钢表面上检测到^-1）签名，这表明在界面上生成了有序的碳材料，从而抑制了不良磨损。

更新日期：2017-09-20

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