期刊论文

Study on photocatalytic degradation of free formaldehyde in TiO_2 nanoparticles modified urea-formaldehyde resin

中文

中南林业科技大学学报

1673-923X

2019

39

7

108-113,142

10.14067/j.cnki.1673-923x.2019.07.015

湖南省科技计划重点项目(2016SK2032) 湖湘青年英才计划(2018RS3092) 国家“十二五”科技支撑计划课题(2012BAD24B03) 国家林业公益性行业科研重大专项(201204704).

本校为第一机构

如何降低游离甲醛含量一直是脲醛树脂研究的热点之一。采用锐钛矿型纳米二氧化钛(TiO_2)改性脲醛树脂,探索在紫外光(波长λ=365 nm)照射下,纳米TiO_2对脲醛树脂中游离甲醛的催化降解效果。通过分析脲醛树脂中游离甲醛的含量,研究了光照类型、时间以及纳米TiO_2的含量对光降解甲醛的影响。使用傅里叶变换红外光谱(FTIR)、同步热分析(TG)表征了光催化降解游离甲醛对脲醛树脂化学结构及热性能的影响。结果表明:在脲醛树脂的降醛处理中,加入尿素质量1 %的锐钛矿型纳米TiO_2,室温下紫外光照时长48 h,可以获得36.7 %的游离甲醛降解率。紫外光照可以促进脲醛树脂的固化,使其固含量和粘度上升,固化时间缩...

How to reduce the free formaldehyde content has always been one of the hot topics in studies of urea-formaldehyde (UF) resin. In this study, the free formaldehyde photodegradation effect of anatase titanium dioxide (TiO_2) nanoparticles in UF resins was explored under UV irradiation (wavelength λ=365 nm). The effect of TiO_2 nanoparticles content, types and duration of irradiation on the degradation of free formaldehyde in UF resins was studied. The functional groups and thermal properties of UF resins after irradiation were characterized usin...