Biocompatible composite of cellulose nanocrystal and hydroxyapatite with large mechanical strength

Proton conductivity dependence on the surface polymer thickness of core–shell type nanoparticles in a proton exchange membrane

“…These results also supported the fact that the desired polymer was uniformly coated onto the surface of core nanoparticles by RAFT PwP and not in a mixed state of nanoparticles and polymer. 39 Furthermore, FTIR measurement of each core-shell type nanoparticles were performed in order to observe the absorptions corresponding to the coated PVPA and PS (see the Electronic Supporting Information).…”

Novel Filler-Filled-Type Polymer Electrolyte Membrane for PEFC Employing Poly(vinylphosphonic acid)-b-polystyrene-Coated Cellulose Nanocrystals as a Filler

“…Figure shows the FT-IR measurement results for pristine CNC, PVPA, CNC@PVPA, PVPA- b -PS, and CNC@PVPA- b -PS. Pristine CNC showed absorption peaks attributed to O–H (1500–1750 and 3000–3500 cm –1 ), C–H (690, 780, 1300–1400, and 1450 cm –1 ), and C–O (1000–1200 cm –1 ) stretching vibrations . For the homopolymer of PVPA, the OP–OH (1600–1780 cm –1 ) bending vibration, OP (1250–1300 cm –1 ) stretching vibration, and P–OH and P–O–P stretching and bending vibrations (900–1000 cm –1 ) appeared. ,− It was confirmed that CNC@PVPA had both CNC and coated polymers peaks.…”

“…Figure shows the TGA measurement results for pristine CNC, CNC@PVPA, and CNC@PVPA- b -PS for the range of 30–700 °C under nitrogen gas flow. Pristine CNC showed a drastic weight loss attributed to the CNC carbonization around 300–350 °C, after which it remained constant at 700 °C. − On the other hand, CNC@PVPA went a weight loss of about 30% from 200 to 300 °C attributed to intramolecular dehydration in PVPA. , Then, there was a gradual decrease in weight between 300 and 450 °C for CNC@PVPA and between 300 and 500 °C for CNC@PVPA- b -PS. This difference in weight loss temperature was considered to be due to the inhibition of the CNC carbonization and PVPA main chains by the polystyrene coating .…”

“…For the filler particle, we focused on nanocellulose due to its high aspect ratio and because nanocellulose materials are one-fifth the weight and five times stronger than steel. − They are divided into cellulose nanofibers (CNF) and cellulose nanocrystals (CNC). CNF has high moldability, which allows the compounding of it as a filler on the exterior of next-generation vehicles as a strengthening agent.…”

Preparation, Properties and Mechanism of Anionic and Cationic CNC/WPU Composite Films

“…Cellulose nanocrystals (CNCs) have become the most active biomass nanoparticles in recent 20 years due to their high annual availability, renewable properties, low cost and excellent mechanical and optical properties (Foster et al 2018). It has been investigated for tissue engineering (Sato et al 2021), food packaging (Rader et al 2021), optically active lms (Zhang et al 2021), and so on (Li et al 2018).…”