文献类型：期刊文献

英文题名：Analysis of the Source of Abnorma Odor Components in Medium Density Fiberboard (Mdf)

作者：Xing, Xuefeng[1,2] Kang, Shifei[1] Li, Shanming[1,2] Luo, Minxian[3]

第一作者：Xing, Xuefeng

机构：[1] Research Institute of Wood Industry, Chinese Academy of Forestry, Beijing, China; [2] Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, Nanjing Forestry University, Nanjing, China; [3] Zhaoqing Lihe Technology Development Co., Ltd, Zhaoqing, China

年份：2024

外文期刊名：SSRN

收录：EI(收录号：20240140991)

语种：英文

外文关键词：Adhesives - Air quality - Formaldehyde - Gases - Hardwoods - Ion mobility spectrometers - Ketones - Mass spectrometry - Odors - Principal component analysis - Urea - Urea formaldehyde resins - Volatile organic compounds

摘要：To investigate the cause of the abnorma odor emitted by medium density fiberboard (MDF) when formaldehyde-free MDI adhesive is used, we conducted a study using MDF made with pine wood and MDI adhesive (PW-MDI), MDF made with pine wood and urea-formaldehyde resin (PW-UF), and MDF made with mixed hardwoods and MDI adhesive (HW-MDI). We collected MDF specimens and analyzed their odor characteristics. Herein, volatile organic compounds (VOCs) emitted from MDFs were collected and analysed by solid-phase microextraction gas chromatography-mass spectrometry (GC-MS), and a total of 86 VOCs were identified, including acids, aldehydes, ketones, alcohols, alkanes, esters, terpenoids and others. The analysis reveals that the PW-MDI specimen contains a higher concentration of acid substances, comprising 56.29% of the specimen. These acid substances were the primary contributors to its abnorma odor. In contrast, the PW-UF and HW-MDI specimens predominantly consist of alcohol substances, accounting for 33.01% and 36.15% respectively. Gas chromatography-ion mobility spectrometry (GC-IMS) was utilized to acquire the fingerprints of the specimens, and the analysis focused on the disparities in volatile organic compounds among them. The results of the principal component analysis (PCA) revealed substantial distinctions in the VOCs present in the three MDF specimens. Acids and aldehydes were found to be the primary contributors to the ROAV. These compounds are known for their unpleasant odors, which affect the surrounding air quality. The research successfully identified the source of the abnormal odor and provided a method to differentiate between odorous boards and regular boards. Furthermore, potential technical solutions to address the odor issue were suggested. ? 2024, The Authors. All rights reserved.