Preparation of light-responsive block copolymer modified cellulose nanocrystal@polydopamine particle and its application in fluorinated polyacrylate film,Journal of Applied Polymer Science

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Preparation of light-responsive block copolymer modified cellulose nanocrystal@polydopamine particle and its application in fluorinated polyacrylate film
Journal of Applied Polymer Science ( IF 2.7 ) Pub Date : 2024-02-09 , DOI: 10.1002/app.55272
Jianhua Zhou _{1,

2} , Yan Li _{1,

3} , Sitong Li _{1,

2} , Mengyuan Zhou _{1,

2} , Kai Lu _{1,

2} , Jiarui Yu _{1,

2}

Affiliation

Light-responsive cellulose nanocrystal@polydopamine (CNC@PDA) modified fluorinated polyacrylate was synthesized by Pickering emulsion polymerization with light-responsive block copolymer modified CNC@PDA as stabilizer. The epoxy groups in poly(acrylic acid-co-acrylamide)-b-poly(glycidyl methacrylate)-b-poly(hexafluorobutyl acrylate-co-coumarin) amphiphilic triblock copolymer reacted with the hydroxyl and amino groups on the surface of CNC@PDA to form the modified CNC@PDA. The successful preparation of modified CNC@PDA was confirmed by means of FT-IR, XRD, TG, UV–Vis, surface tension measurement, and X-ray photoelectron spectroscopy (XPS) techniques. The results showed that the modified CNC@PDA had light-responsive and amphiphilic properties, and could be used as stabilizer to form stable Pickering emulsion. And the influence of modified CNC@PDA dosage on emulsion polymerization and film performance was systematically studied. The latex particle size decreased initially with increasing modified CNC@PDA dosage, from 0.6 to 1.0 wt%, and then increased. The mechanical, self-healing, and water–oil repellent properties of film were enhanced initially with increasing modified CNC@PDA dosage, from 0.6 to 1.0 wt%, and then declined. Atomic force microscope confirmed that the latex film had a rough surface. Moreover, the latex film comprising 1.0 wt% modified CNC@PDA presented not only high tensile strength (4.92 MPa), large elongation at break (657.70%), and superior oil/water repellency but also excellent self-healing property.

中文翻译：

光响应嵌段共聚物改性纤维素纳米晶@聚多巴胺颗粒的制备及其在氟化聚丙烯酸酯薄膜中的应用

以光响应嵌段共聚物改性CNC@PDA为稳定剂，采用Pickering乳液聚合法合成了光响应纤维素纳米晶@聚多巴胺(CNC@PDA)改性氟化聚丙烯酸酯。聚(丙烯酸-共-丙烯酰胺)-b-聚(甲基丙烯酸缩水甘油酯)-b-聚(丙烯酸六氟丁酯-共-香豆素)两亲性三嵌段共聚物中的环氧基团与CNC@PDA表面的羟基和氨基反应形成修改后的CNC@PDA。通过 FT-IR、XRD、TG、UV-Vis、表面张力测量和 X 射线光电子能谱 (XPS) 技术证实了改性 CNC@PDA 的成功制备。结果表明，改性后的CNC@PDA具有光响应性和两亲性，可以作为稳定剂形成稳定的Pickering乳液。并系统研究了改性CNC@PDA用量对乳液聚合和成膜性能的影响。随着改性 CNC@PDA 用量的增加（从 0.6 wt% 增加到 1.0 wt%），乳胶粒径首先减小，然后增加。随着改性CNC@PDA用量从0.6wt%增加到1.0wt%，薄膜的机械性能、自修复性能和拒水拒油性能最初增强，然后下降。原子力显微镜证实乳胶膜具有粗糙的表面。此外，含有1.0 wt%改性CNC@PDA的乳胶膜不仅具有高拉伸强度（4.92 MPa）、大断裂伸长率（657.70%）和优异的拒油/拒水性，而且还具有优异的自修复性能。

更新日期：2024-02-09

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