Atomic layer deposition of aluminium on anatase: A solid acid catalyst with remarkable performances for alcohol dehydration

Song, Yingji; Xu, Shaodan; Ling, Fei; Tian, Panpan; Ye, Tao; Yu, Deqing; Chu, Xuefeng; Lin, Yingzi; Yang, Xiaotian; Tang, Junhong

doi:10.1016/j.catcom.2017.05.018

Cited by 4 publications

(1 citation statement)

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“…It can therefore be predicted that a glycerol radical would have an even smaller activation energy, as it is less stable state of glycerol. Under the presence of a metal oxide, which has acidic sites and acidic properties [36][37][38], dehydration of the radical glycerol could have been catalyzed during the polymerization process. The consequent formation of alkenes means that these  carbon bonds may have been cleaved in the polymerization process and incorporated into the polymeric chain.…”

Section: Mirmentioning

confidence: 99%

Effect of metal oxide fillers in urethane dimethacrylate polymer with glycerol obtained by photopolymerization synthesis

et al. 2020

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Urethane dimethacrylate (UDMA) is a monomer widely used in photopolymerization reactions to produce biomaterials, due to its advantageous properties such as mechanical resistance and relatively low viscosity.However, this monomer is expensive. Reducing the quantity of UDMA monomer required to obtain the final polymer, without losing its main properties, is essential not just in terms of costs but also green chemistry principles. It has been demonstrated that glycerol inclusion into the polymeric matrix during polymerization is one way to achieve this goal. Thus, this work proposes the insertion of glycerol and metal oxide fillers (Al2O3, TiO2, Nb2O5, La2O3 and ZrO2) in the photopolymerization of urethane dimethacrylate, with the aim to study how these effects the degree of conversion, as well as the thermal properties of the final polymer. The thermal properties were evaluated using simultaneous thermogravimetry-differential thermal analysis (TG-DTA) and differential scanning calorimetry (DSC). The degree of conversion/rate of polymerization was calculated using mid-infrared spectroscopy (MIR). The polymers filled with Al2O3, TiO2, Nb2O5 and La2O3 exhibited good conversion values of 87.42, 78.47, 77.64 and 75.51%, respectively. For all polymers synthesized, no significant changes were observed in their thermal stability. Lastly, it is suggested that the incorporation of the oxides in the monomeric mixture correlate to the degree of conversion, with scanning electronic microscopy (SEM) analysis suggesting oxide dispersion interferes with the morphology of the polymer.

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Section: Mirmentioning

confidence: 99%