Sub‐nanometer titanium‐oxo cluster‐polymer nanocomposites for elastic, transparent UV‐resistant films and nano‐coatings

Abstract

Core‐shell inorganic‐organic hybrid nanocomposites, Ti‐PMMAs are constructed applying the titanium‐oxo cluster (Ti6O4(BrC[CH3]2COO)8(OiPr)8, TiO; iPr = isopropyl) as quasi‐spherical initiator for ATRP (atom‐transfer radical polymerization). Confirmed by UV‐Vis measurements and mechanical test, Ti‐PMMAs inherit the properties of both TiO cluster and polymers and show outstanding UV‐proof performance, high visible light transmittances, and excellent mechanical properties and processabilities. The elasticity and toughness of TiO‐polymer nanocomposites can be further optimized by simply tuning the polymer composites during the ATRP reactions. The admirable processability of the hybrid materials render us the capability to produce uniform nano‐coatings of Ti‐PMMAs and TiO2 with thickness approaching to a challenging length scale, 10 nm.

Aggregation of titanium‐oxo clusters

“…Color codes: gray octahedron, TiO 6 ; green sphere, C; gray sphere, H. Copyright 2019, Society of Plastics Engineers. [127] single crystals for structural determination, covalent bondconnected TOC frameworks have higher stability advantages than traditional coordination compounds. Besides, the construction of frameworks via amino-aldehyde condensation is more purposeful.…”

Enhancing mechanical, thermal property and flame retardancy of optical polythiourethane with self‐assembly phosphazene nanoparticles

“…Especially, in view of the high requirements of materials, optical coatings with high performance such as high refractive index, high mechanical property and good flame retardancy have recently attracted increasing research attention. [ 13–22 ] With excellent optical property, wear resistance of polythiourethane(PTU) becomes a good choice. PTU possesses thiourethane bond with low bond dissociation energy giving ideal self‐healing ability [ 23,24 ] and high content flexible thioether bonds impart materials high refractive index and excellent flexibility.…”

Preparation and research of optical coating of star‐shaped titanium‐oxo cluster‐hybrid material

“…7,8 Recently metal oxides clusters have drawn increasing interest because of their board applications in catalysis, optic and electronic devices, medical imaging, magnetic materials, and energy conversion. 9 These clusters have a clear structure and can undergo corresponding surface modification, which has been proved to be promising in the design of functional hybrid materials. 10 Typically, polymers can be grafted on these clusters with tunable densities and strength and metal oxide cluster/polymer nanocomposites with well-defined structures can be prepared.…”

“…Recently metal oxides clusters have drawn increasing interest because of their board applications in catalysis, optic and electronic devices, medical imaging, magnetic materials, and energy conversion 9 . These clusters have a clear structure and can undergo corresponding surface modification, which has been proved to be promising in the design of functional hybrid materials 10 .…”