Szabó László, Imanishi Sari, Kawashima Naohiro, Hoshino Rina, Takada Kenji, Hirose Daisuke, Tsukegi Takayuki, Ninomiya Kazuaki, Takahashi Kenji
Institute of Science and Engineering, Kanazawa University Kakuma-machi Kanazawa 920-1192 Japan
Innovative Composite Center, Kanazawa Institute of Technology 2-2 Yatsukaho Hakusan 924-0838 Japan.
RSC Adv. 2018 Jun 20;8(40):22729-22736. doi: 10.1039/c8ra04299c. eCollection 2018 Jun 19.
Interfacial interactions governing the interfacial adhesion between cellulose propionate and carbon fibre surface are placed under scrutiny to pave the way towards the development of green cellulose-based carbon fibre reinforced polymers. A range of molecular entities are deposited on the surface by initially grafting aromatic structures with appropriate functions diazonium species followed by further derivatization of these entities. Cellulose propionate was also bound covalently to the surface a tosylated derivative invoking its facile nucleophilic displacement reaction with surface-grafted amino functions. Significant increase in interfacial shear strength was obtained for the cellulose propionate-grafted carbon fibre composite as well as for the 4-(aminomethyl)benzene-functionalized sample, in the latter case possible hydrogen bonding took place with the cellulose propionate matrix. Furthermore, the positive effect of a highly lipophilic and yet compact -CF substituent was also noted. In order to let the grafted structure efficiently penetrate into the matrix, steric factors, lipophilicity and potential secondary interactions should be considered. It needs to be pointed out that we provide the first synthetic strategy to covalently bind cellulose derivatives to a largely graphitic surface and as such, it has relevance to carbonaceous materials being applied in cellulose-based innovative materials in the future.
为了推动绿色纤维素基碳纤维增强聚合物的发展，对控制丙酸纤维素与碳纤维表面之间界面粘附力的界面相互作用进行了研究。通过首先接枝具有适当功能的芳族结构（重氮物种），然后对这些实体进行进一步衍生化，将一系列分子实体沉积在表面上。丙酸纤维素也通过一种甲苯磺酰化衍生物与表面接枝的氨基官能团发生亲核取代反应而共价结合到表面上。对于丙酸纤维素接枝的碳纤维复合材料以及4-（氨基甲基）苯官能化的样品，界面剪切强度有显著提高，在后一种情况下，可能与丙酸纤维素基体发生了氢键作用。此外，还注意到了高度亲脂且紧密的-CF取代基的积极作用。为了使接枝结构有效地渗透到基体中，应考虑空间因素、亲脂性和潜在的二次相互作用。需要指出的是，我们提供了第一种将纤维素衍生物共价结合到基本上为石墨表面的合成策略，因此，它与未来应用于纤维素基创新材料中的碳质材料相关。
