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排序方式: 共有303条查询结果,搜索用时 62 毫秒
301.
Shuji Fujisawa Kazuho Daicho Ayhan Yurtsever Takeshi Fukuma Tsuguyuki Saito 《Small (Weinheim an der Bergstrasse, Germany)》2023,19(30):2302276
Nanocellulose is attracting attention in the field of materials science as a sustainable building block. Nanocellulose-based materials, such as films, membranes, and foams, are fabricated by drying colloidal dispersions. However, little is known about how the structure of a single nanocellulose changes during the complex drying process. Here, all-atom molecular dynamics simulations and atomic force microscopy is used to investigate the structural dynamics of single nanocellulose during drying. It is found that the twist morphology of the nanocellulose became localized along the fibril axis during the final stage of the drying process. Moreover, it is shown that conformational changes at C6 hydroxymethyl groups and glycoside bond is accompanied by the twist localization, indicating that the increase in the crystallinity occurred in the process. It is expected that the results will provide molecular insights into nanocellulose structures in material processing, which is helpful for the design of materials with advanced functionalities. 相似文献
302.
Siqian Wang Wei Hsun Hu Yasuyuki Nakamura Nanami Fujisawa Ane Eline Herlyng Mitsuhiro Ebara Masanobu Naito 《Advanced functional materials》2023,33(36):2215064
Development of tough, reusable adhesives is important, but remains a major challenge, especially in water. A tough reusable adhesive that resets entirely to its virgin condition when needed is reported using caffeic acid. Here, caffeic acid is employed as adhesive moiety to achieve such the functions due to its dual characteristics: an adhesive moiety from mussel-inspired catechol and a photo-reversible crosslink from cinnamic acid. Adhesion involves a two-step process. First, the caffeic acid-functionalized polymer is applied to the adherend, followed by UV irradiation (peak wavelength of light-emitting diode, λP: 365 nm) to form a durable pre-applied adhesive (PAA) layer through crosslinking among the caffeic acid moieties. Second, thermal activation of the PAA layer ensures repeated adhesion to a variety of adherends ( R euse- M any mode). The cyclic dimer of the caffeic acid moiety is de-crosslinked by UV irradiation at λP: 254 nm. This allows the complete removal of the adhesive residues from the adherends when the adhesive is no longer needed ( R eset- O n demand mode). Furthermore, using magnetic nanoparticles, the caffeic acid-functionalized polymer can be activated remotely under water by magnetic induction heating. This study paves the way for the rational design of bio-inspired adhesives that outperform nature using plant-derived raw materials. 相似文献
303.
Koubara Akihiro Shirai Kazuma Shimamura Kazushi Shigaki Shunsuke Fujisawa Ryusuke 《Artificial Life and Robotics》2023,28(3):591-599
Artificial Life and Robotics - In recent years, automated systems and robots have been implemented in biological behavioral experiments to understand taxis. In this study, we propose a servosphere... 相似文献