Modification of Urea- Formaldehyde Resin with Furfural in Particleboard for Reduction of Formaldehyde Emission

Document Type : Research Paper

Authors

1 M.Sc., Department of Wood and Paper Science and Technology, Faculty of Natural Resources, University of Tehran, Karaj, I. R. Iran

2 Professor, Department of Wood and Paper Science and Technology, Faculty of Natural Resources, University of Tehran, Karaj, I. R. Iran

3 Associate Professor, Department of Wood and Paper Science and Technology, Faculty of Natural Resources, University of Tehran, Karaj, I. R. Irann

4 Professor, Departmentof Chemistry, Payame Noor University, Tehran I.R., Iran

Abstract

Partial replacement of formaldehyde with furfural in the urea-formaldehyde resin on the formaldehyde
emission, physical and mechanical properties of particleboard was investigated. The modulus of
rupture (MOR), modulus of elasticity (MOE), internal bond (IB), water absorption (WA), thickness
swelling (TS) and formaldehyde emission (FE) of Poplar particleboards made with the modified
resins were measured and were compared with the conventional UF resin. Also, chemical structures of
the synthesized Resins were characterized by Fourier Transform Infrared Spectroscopy (FTIR). The
results indicated that modulus of rupture (MOR), modulus of elasticity (MOE) and formaldehyde
emission (FE) from boards was decreased by partial replacement of formaldehyde. Boards prepared
with modified resin with 50% furfural showed the highest internal bond (IB). Two and 24 hours water
uptake test of the boards prepared with modified resin unlike thickness swelling was decreased
compared to the conventional resin. Boards prepared with industrial urea-formaldehyde resin
presented the least thickness swelling. Best treatment and condition of preparing boards in terms of
MOR, MOE and stableness of dimensions, it can be introduced using urea-formaldehyde resin (except
formaldehyde emission), also in terms of IB and water absorption, using resin modified with 50%
furfural. Boards cured with conventional UF resin presented the least formaldehyde emission.

Keywords

References

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Forest and Wood Products
Volume 67, Issue 3 - Serial Number 3
October 2014
Pages 475-487

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