近红外响应硫化铜纳米粒子/液晶弹性体复合材料研究

葛斯佳; 单周楠; 邓琳琳; 林保平; 杨洪

doi:10.11777/j.issn1000-3304.2017.17105

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近红外响应硫化铜纳米粒子/液晶弹性体复合材料研究

研究论文 | 更新时间：2021-01-26

- 近红外响应硫化铜纳米粒子/液晶弹性体复合材料研究
- Near-infrared-responsive Copper Sulfide Nanoparticle/Liquid Crystal Elastomer Composites
- 高分子学报 2017年第10期页码：1633-1640
- 作者机构：
  
  东南大学化学化工学院南京 211189
- 作者简介：
  
  杨洪, E-mail: yangh@seu.edu.cn Hong Yang, E-mail: yangh@seu.edu.cn
- 基金信息：
  
  国家自然科学基金(21374016)
- DOI：10.11777/j.issn1000-3304.2017.17105
  中图分类号：
- 纸质出版日期：2017-10-20，
  
  收稿日期：2017-4-26，
  
  修回日期：2017-5-11，
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葛斯佳, 单周楠, 邓琳琳, 林保平, 杨洪. 近红外响应硫化铜纳米粒子/液晶弹性体复合材料研究[J]. 高分子学报, 2017,(10):1633-1640.

Ge Si-jia, Shan Zhou-nan, Deng Lin-lin, Lin Bao-ping, Yang Hong. Near-infrared-responsive Copper Sulfide Nanoparticle/Liquid Crystal Elastomer Composites[J]. Acta Polymerica Sinica, 2017,(10):1633-1640.
葛斯佳, 单周楠, 邓琳琳, 林保平, 杨洪. 近红外响应硫化铜纳米粒子/液晶弹性体复合材料研究[J]. 高分子学报, 2017,(10):1633-1640. DOI： 10.11777/j.issn1000-3304.2017.17105.

Ge Si-jia, Shan Zhou-nan, Deng Lin-lin, Lin Bao-ping, Yang Hong. Near-infrared-responsive Copper Sulfide Nanoparticle/Liquid Crystal Elastomer Composites[J]. Acta Polymerica Sinica, 2017,(10):1633-1640. DOI： 10.11777/j.issn1000-3304.2017.17105.

摘要

报道了一种新型近红外响应光热转换试剂/液晶弹性体复合材料.目前绝大多数近红外吸收的无机金属纳米粒子，由于自身或其稳定剂（如长链硫醇或季铵盐）的化学性质，会致使经典的Finkelmann两步硅氢化加成反应中所使用的催化剂中毒失活，从而极大地限制了无机金属纳米粒子/液晶弹性体复合材料的拓展与应用.为了解决这一科学问题，我们采用了两步硫醇-烯点击化学快速制备单畴取向液晶弹性体薄膜的技术，将对近红外光有强吸收的油溶性硫化铜纳米粒子，成功地掺杂入聚硅氧烷液晶弹性体体系中，制备了近红外响应的硫化铜纳米粒子/液晶弹性体复合薄膜.通过使用紫外可见光谱、透射电子显微镜、扫描电子显微镜、偏光显微镜、示差扫描量热法、变温广角X射线散射对该复合材料进行了深入的研究，结果表明：该薄膜材料在980 nm近红外光源的照射下，可以实现高效的光热转换，从而实现快速、可逆的二维伸缩运动.

Abstract

We report a novel near-infrared-responsive photothermal conversion reagent/liquid crystal elastomer composite material. Nowadays

most of the near-infrared absorbing inorganic metal nanoparticles can poison platinum and other precious metal catalysts

due to the chemical properties of these metal nanoparticles or their stabilizers (such as long chain thiols

quaternary ammonium salts

etc

which cause the failure to prepare inorganic metal nanoparticle/liquid crystal elastomer composites through classical Finkelmann two-step hydrosilylation reaction. In order to solve this problem

we apply a fast two-step thiol-ene photoaddition technique

by embedding near-infrared-responsive copper sulfide nanoparticles into liquid crystal elastomer matrix

and a composite film

based on copper sulfide nanoparticle/liquid crystal elastomer with near-infrared-responsiveness

is successfully fabricated for the first time. Water-soluble CuS nanoparticles are first synthesized

and oil-soluble CuS nanoparticles are prepared by exchanging the sodium citrate stabilizer with poly(3-mercaptopropyl methylsiloxanes) (PMMS). The latter is mixed with PMMS

mesogenic monomers

crosslinkers and photoinitiators. The mixture is cast into a polytetrafluoroethylene mould and UV-illuminated at room temperature for 3 min to provide a pre-crosslinked liquid crystal elastomer composite film

which is further hung up and uniaxially stretched. The suspended pre-crosslinked liquid crystal elastomer film is UV-irradiated again at room temperature for another 15 min. to accomplish the second thiol-ene photo-crosslinking to obtain the composite film consisting of monodomain copper sulfide nanoparticle/liquid crystal elastomer. This composite material is thoroughly investigated using ultra-violet spectroscopy

transmission electron microscopy

polarized optical microscope

differential scanning calorimetry

and one-dimensional X-ray scattering. The experimental results demonstrate that this composite has a room-temperature nematic liquid crystal phase with a high-quality monodomain alignment. Most importantly

this composite film can perform a fast and reversible two-dimensional shrinking motion under irradiation of near infrared light with a wavelength of 980 nm .

关键词

光热转换液晶弹性体硫化铜纳米粒子近红外光硫醇-烯点击化学

Keywords

Photothermal conversionLiquid crystal elastomerCopper sulfide nanoparticlesNear infrared lightThiol-ene click chemistry

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