東京大学 · 재료과학
나오코 요시에 교수의 연구실은 생체 모방 구조와 역동적 결합을 활용한 고성능 고분자 재료 개발에 초점을 맞추고 있습니다. 특히, 자가복구성 능력과 높은 인장성·내충격성을 동시에 구현하는 고분자 네트워크의 설계 원리를 연구하며, 수소결합, 가역적 물리적 교차결합, 수분 유도 자가치유 메커니즘 등을 핵심 전략으로 삼고 있습니다. 고해상도 NMR 분석과 X선 회절을 통해 고분자 구조-성질 상관관계를 정량적으로 규명하고 있습니다.
표시된 성과는 수집된 데이터 기준으로 산출되며, 일부 차이가 있을 수 있습니다.
Incorporating reversible sacrificial bonds in network polymers not only toughens these materials but also endows them with self‐recoverability. However, self‐recoverability is only realized for dispersed energy less than 10 MJ m −3 . It remains a challenge to achieve simultaneous high stretchability, toughness, and recoverability. Here, inspired by the structure of mussel byssus cuticles, a new design strategy is proposed and demonstrated to improve both the toughness and self‐recoverability of
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTComplex composition distribution of poly(3-hydroxybutyrate-co-3-hydroxyvalerate)Naoko Yoshie, Hiroyuki Menju, Hidenori Sato, and Yoshio InoueCite this: Macromolecules 1995, 28, 19, 6516–6521Publication Date (Print):September 1, 1995Publication History Published online1 May 2002Published inissue 1 September 1995https://pubs.acs.org/doi/10.1021/ma00123a018https://doi.org/10.1021/ma00123a018research-articleACS PublicationsRequest reuse permissionsArticle
A strategy of utilizing atmospheric moisture for self-healing polymers is investigated.
Abstract Compatibility of a crystalline/crystalline polymer blend, poly(vinyl alcohol) (PVA)/poly(3‐hydroxybutyrate) (PHB), was studied by high‐resolution solid‐state 13 C‐NMR spectroscopy. The 1 H T 1 measurement demonstrated that both the compatibility and the domain size depend on the composition of the blend. The PVA/PHB blend is compatible only when the blend contains a large amount of PVA. The domain sizes of the compatible blend are less than 200 Å. In the pulse saturation transfer (PST)
The incorporation of weak and reversible dynamic bonds is a key strategy for enhancing the mechanical properties of polymers. However, the quantitative relationship between the molecular characteristics of dynamic bonds and the resultant macroscopic mechanical properties has not been elucidated fully. Here, we systematically investigated the effect of hydrogen bonds (H-bonds) on the mechanical properties of polymer networks. Three types of H-bonding groups were homogeneously introduced into iden
The structure of the isomorphous crystals of P(HB-co-HV) in the PHB crystalline lattice is examined in detail, and a structural transition at ca. 10 mol % HV is found for the first time. By analyzing a series of P(HB-co-HV) samples prepared by the same treatment, the effect of the thermal history was removed from the results, and the composition dependence of the crystal formation and of the resultant crystalline structure was highlighted. The crystallinity, unit cell dimensions, and lamella thi
A non-swellable and highly self-healable polymer in seawater is obtained. Dynamic crosslinking of catechol-based polymers with <italic>p</italic>-phenyldiboronic acid through non-ionic boronate ester bonds is the key to realizing these two properties simultaneously.
The change in the surface structure of poly[(R)-3-hydroxybutyrate] [PHB] films upon the enzymatic hydrolysis was analyzed by attenuated total reflection infrared [ATR/IR] spectrometry. As enzymes, PHB depolymerases isolated from Ralstonia pickettii T1 and Pseudomonas stutzeri were used. By curve decomposition of the carbonyl stretching band of ATR/IR spectra, the change in the surface crystallinity of PHB films by exposure to buffer containing 0, 1, and 4 microg of PHB depolymerases was estimate
