Hybrid Mixed-Metal Oxide Latex Composite Thin Films for Passive Control of Indoor Formaldehyde
Hybrid Mixed-Metal Oxide Latex Composite Thin Films for Passive Control of Indoor Formaldehyde
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DOI：
10.1021/acsaenm.3c00194
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发表时间：
2023-06
期刊：
影响因子：
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通讯作者：
P. Aina;Busuyi O. Adebayo;Kyle Newport;A. Rownaghi;Fateme Rezaei
中科院分区：
文献类型：
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作者：
P. Aina;Busuyi O. Adebayo;Kyle Newport;A. Rownaghi;Fateme Rezaei
本研究提出了混合金属氧化物（MMO）涂层乳胶复合材料的制备，表征和甲醛（HCHO）吸附性能的室内空气质量控制。通过聚丙二醇（PPG）在乳胶聚合物膜上涂覆一薄层TiO 2/SiO 2颗粒，以通过氢键作用促进MMO颗粒的均匀沉积，同时为甲醛的吸附提供额外的活性位点，制备了杂化MMO-乳胶复合材料。系统地研究了PPG含量对复合材料在捕获能力和动力学方面的甲醛去除性能的影响。室内箱试验表明，甲醛的复合薄膜的吸附容量和动力学分别增加了36%和63%，相比，在相同的条件下，其MMO-掺入胶乳类似物。此外，我们的研究结果表明，当PPG含量从0增加到90重量%，甲醛吸附容量和速率显着提高从0.36至0.57 mmol/g和0.01至0.14 h-1，分别，由于增加的亲和力和更好的可达性的吸附活性位点的薄膜中均匀沉积的MMO颗粒。还发现湿度水平从45%RH增加到80%RH可使HCHO捕获率提高50%。这项工作的研究结果表明，混合MMO涂层胶乳复合材料具有上级甲醛吸附性能相比，其纳入MMO-胶乳类似物。
This study presents the preparation, characterization, and formaldehyde (HCHO) adsorption performance of hybrid mixed-metal oxide (MMO)–coated latex composites for indoor air quality control. The hybrid MMO–latex composites were prepared by coating a thin layer of TiO2/SiO2particles onto a latex polymer film using polypropylene glycol (PPG) to aid in uniform deposition of MMO particles via hydrogen bonding, while also providing additional active sites for HCHO adsorption. The effect of PPG content on the HCHO removal performance of the composites in terms of capture capacity and kinetics were systematically investigated. The indoor chamber tests indicated that the HCHO adsorption capacity and kinetics of the composite thin film increased by 36% and 63%, respectively, compared to those of its MMO-incorporated latex analogue under identical conditions. Moreover, our results indicated that upon increasing the PPG content from 0 to 90 wt %, the HCHO adsorption capacity and rate were significantly enhanced from 0.36 to 0.57 mmol/g and 0.01 to 0.14 h–1, respectively, due to increased affinity and better accessibility to the adsorption active sites in the thin films with uniformly deposited MMO particles. The increase in the humidity level from 45 to 80% RH was also found to promote the rate of HCHO capture by 50%. The findings of this work demonstrate that hybrid MMO–coated latex composites have superior HCHO adsorptive performance compared to their incorporated MMO–latex analogues.