Preparation and Structural Characterization of New Photopolymerizable Transparent Aluminum-Phosphate Hybrid Materials as Resins for 3D Printing

Autor(es)

Tayama, Gabriel Toshiaki ^[1] ; Santagneli, Silvia Helena ^[1] ; Eckert, Hellmut ^[2] ; Pawsey, Shane ^[3] ; Messaddeq, Younes ^{[1, 4]}

Afiliação do(s) autor(es)

^[1] Sao Paulo State Univ UNESP, Chem Inst, BR-14800900 Araraquara, SP - Brazil

^[2] Univ Sao Paulo, Sao Carlos Inst Phys, BR-13566590 Sao Carlos, SP - Brazil

^[3] Bruker BioSpin Corp, Billerica, MA 01821 - USA

^[4] Univ Laval, Ctr Opt Photon & Laser COPL, Quebec City, PQ G1V 0A6 - Canada

• Tipo de documento: Artigo Científico
• Fonte: Journal of Physical Chemistry C; v. 124, n. 46, p. 25621-25631, NOV 19 2020.
• Citações Web of Science: 0

Resumo

The use of a hybrid sol-gel route to prepare silicate hybrid materials and glasses through stereolithography and other photopolymerizable based additive manufacturing techniques has become a major topic. In this work, we present a new synthesis of 2-hydroxyethyl methacrylate/aluminum-phosphate hybrid materials with potential use on additive manufacturing through stereolithography (SLA). The unique sol-gel chemistry of phosphates and their strong reactivity toward metal alkoxide precursors pose special challenges toward stable sols with low solvent concentration. Here, we were able to control condensation reactions, avoiding precipitation, yielding clear and long shelf-life stable 2-hydroxyethyl methacrylate/aluminum-phosphate hybrid sols with different Al/(Al + P) ratios (from 0% up to 50%), which can be further photopolymerized, yielding transparent crack-free monolithic materials. A detailed structural study through multinuclear solid-state NMR and infrared spectroscopies showed a high polymerization degree with inorganic Al-y(PO4)(x)-like fragments acting as cross-linkers. These cross-linked structures are sensitive to the Al/(Al + P) ratio, and an increasing aluminum concentration results in a higher degree of inorganic condensation. The organic-inorganic structures are highly interconnected resulting in homogeneous materials. (AU)

• Processo FAPESP: 18/24735-3 - Correlação entre a estrutura e as propriedades investigada por RMN multinuclear no estado sólido em materiais desordenados
• Beneficiário: Silvia Helena Santagneli
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 15/22828-6 - Ultrapassando as fronteiras de fibras ópticas: da fotônica até optogenética e monitoramento de meio ambiente
• Beneficiário: Younes Messaddeq
• Modalidade de apoio: Auxílio à Pesquisa - Programa SPEC
• Processo FAPESP: 18/06426-3 - Desenvolvimento de coacervatos para manufatura aditiva/impressão 3D de materiais fotônicos
• Beneficiário: Gabriel Toshiaki Tayama
• Modalidade de apoio: Bolsas no Brasil - Doutorado Direto