Low-formaldehyde?emission composite particleboard manufactured from waste chestnut bur

编号 020028801

推送时间 20210426

研究领域 林产化工 

年份 2021 

类型 期刊 

语种 英语

标题 Low-formaldehyde?emission composite particleboard manufactured from waste chestnut bur

来源期刊 Journal of Wood Science

期 第288期

发表时间 20210305

关键词 Chestnut bur;  Composite particleboard;  Formaldehyde;  Polyphenol; 

摘要 Chestnut bur is an agro-waste material generated in the chestnut production. It is a tannin-rich lignocellulosic material which might be a promising raw material for low-formaldehyde?composite particleboard production when using urea-formaldehyde?(UF) as bonding adhesive. In this study, the characteristics of chestnut bur were analyzed to assess its application value for composite panel. Five-type particleboards were manufactured from the mixture of chestnut bur/poplar particles with the weight ratios of 0/100, 25/75, 50/50, 75/25 and 100/0, UF?resin?was used as bonding adhesive. The effects of the addition amount of chestnut bur on the physical,?mechanical properties?and?formaldehyde?emission of particleboard were studied. The results showed as follows: (1) chestnut bur showed low cellulose, hemicelluloses and lignin contents, but high extractives and ash contents compared with poplar wood. Chestnut bur and poplar wood had the similar fiber morphology. (2) Composite board with relatively good performances could be manufactured with mix particles of chestnut bur and poplar wood. With the increasing of chestnut bur content, the?mechanical properties?of the composite board decreased, whereas the dimensional stability increased. (3) The total phenol content in the chestnut bur was as high as 13.79%. The phenolic substance in the chestnut burs could react with free?formaldehyde. Hence, the free?formaldehyde?emission of particleboard was effectively reduced. In summary, waste chestnut bur is a suitable material which can not only be utilized as the base material, but also a natural free?formaldehyde?scavenger for composite particleboard production.

服务人员 尚玮姣

服务院士 宋湛谦

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