Category Archives: News

Synthesis Of Cortical Bone-inspired Materials With Enhanced Toughness And Water Resistance Via Quaternary Ammonium Cation Modification Of Sodium Carboxymethylcellulose/hydroxyapatite Composites – Nature

Nature Jul 31, 2026

Inspired by the hierarchical nanocomposite structure of cortical bone we developed a sustainable biomass-derived composite by incorporating hydroxyapatite HAP from porcine bone ash and cetyltrimethylammonium cations CTA into a sodium carboxymethylcellulose CMC-Na matrix. The composite exhibited toughness comparable to that of ordinary concrete and its water absorption was similar to that of wood8211cement composites. Interactions among the carboxylate groups 8211COO8722 of CMC-Na HAP and CTA along with the thermomechanical properties and water resistance of the composite were characterized using TG8211DTA DSC FT-IR three-point bending tests and water immersion tests after hot uniaxial pressing. We showed that introducing CTA at a CTA8211COO8722 feed molar ratio of 1.5 under mild conditions 25 176C effectively modified the matrix while preserving the 8211COO8722HAP interfacial interactions. This structural optimization simultaneously improved both the toughness and water resistance increasing the fracture energy 2.2-fold compared with that of the CTA-free counterpart while reducing water absorption to 28. These results demonstrate that surfactant-mediated interfacial engineering is an effective strategy for developing bone-mimetic composites. Furthermore combining this approach with conventional hydrophobization techniques such as acylation offers a promising route for advancing high-performance sustainable biomass-based structural materials. By incorporating cetyltrimethylammonium cations CTA into an aqueous dispersion of sodium carboxymethylcellulose CMC-Na and porcine bone ash-derived hydroxyapatite HAP we successfully synthesized a cortical bone-inspired composite material exhibiting superior toughness and water resistance. This strategy effectively imparted hydrophobicity arising from the long alkyl chains while preserving the crucial 8211COO8722HAP interactions thereby mimicking the structural and mechanical characteristics of natural cortical bone.

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News – Hexcel

Hexcel Jul 31, 2026

ACMA and Hexcel announce the appointment of Imad Atallah VP of Product Management and Commercial Growth Americas amp Global Fibers to the ACMA Board of Directors.

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