木材科学与技术2024，Vol.38Issue(6)：23-31,9.DOI:10.12326/j.2096-9694.2024062
复合粉体改性MUF树脂胶黏剂的制备及其在中密度纤维板中的应用
Preparation of Modified Melamine-Urea-Formaldehyde Resin with Blended Powder and Its Application in Medium Density Fiberboards
摘要
Abstract
In this study mica powder and diatomaceous earth(composite powder)were physically blended to modify urea melamine formaldehyde(MUF)resin at different mass ratios(3∶7,5∶5,7∶3)and quantities(5%,10%,15%).Multiple characterization methods were used to investigate the properties of MUF resin before and after modification and medium density fiberboards(MDF)made with this resin.The effects of mass ratio and quantity of the blended powder on the properties of fiberboards was discussed.The results showed that adding blended powder to MUF resin increased its viscosity and solid content,extended curing time,and reduced free formaldehyde content.Minor changes in functional groups of fiberboards prepared with the modified adhesive were found.The thermal stability was improved.When the mass ratio of mica powder to diatomaceous earth was 7∶3 with the quantity of 5%,the modulus of rupture,the modulus of elasticity,and the internal bonding strength of the MDF were 27.11,2 523,and 0.81 MPa,respectively,which were 9%,7%,and 53%higher than without modification.The 24-hour water absorption thickness expansion rate was 8.5%.The physical and mechanical properties met the performance requirements of the ordinary MDF used in a dry state according to the GB/T 11718-2021"Medium Density Fiberboard".The formaldehyde emission decreased from 3.50 mg/100 g to 2.85 mg/100 g,which was a decrease of 19%,meeting the E0 level requirement of T/CNFPIA 1001-2019"Formaldehyde Emission Limits for Artificial Boards".关键词
复合粉体/硅藻土/云母粉/MUF树脂/中密度纤维板Key words
blended powder/diatomite/mica powder/MUF resin/medium density fiberboard分类
轻工纺织引用本文复制引用
林金秀,陈文渊,凌尚现,陶靖,胡振光..复合粉体改性MUF树脂胶黏剂的制备及其在中密度纤维板中的应用[J].木材科学与技术,2024,38(6):23-31,9.基金项目
广西重点研发项目"基于伊蒙黏土改性的高性能环保胶黏剂制备关键技术研究与示范"(AB24010212). （AB24010212）
