Reduced use of urea-formaldehyde resin and press time due to the use of melamine resin-impregnated paper waste in MDF

Summary Using UV-microscopy, absorbance spectra of a cured melamine-urea-formaldehyde resin and secondary cell walls of spruce wood glued with this resin were determined. Analysis of the spectra showed that peaks characteristic for both coniferous lignin and melamine resin were present in cell walls of tracheids embedded in the resin. A quantitative estimate indicated a melamine content of the resin embedded cell walls of 6.2%. It could be demonstrated that UV-microscopy is well suited for the investigation of resin diffusion into the wood cell wall.

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Effects of Three Biomass Fillers on the Properties of Melamine Modified Urea-Formaldehyde Resin

IOP Conference Series Materials Science and Engineering ◽

10.1088/1757-899x/782/2/022077 ◽

2020 ◽

Vol 782 ◽

pp. 022077

Author(s):

Shanfeng Xu ◽

Sanshan Xia ◽

Yuzhu Chen ◽

Hui Xiao ◽

Maoyu Yi ◽

...

Keyword(s):

Urea Formaldehyde ◽

Urea Formaldehyde Resin ◽

Formaldehyde Resin ◽

Modified Urea

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Calcium carbonate modified urea–formaldehyde resin adhesive for strength enhanced medium density fiberboard production

RSC Advances ◽

10.1039/d1ra04316a ◽

2021 ◽

Vol 11 (40) ◽

pp. 25010-25017

Author(s):

Li Lu ◽

Yan Wang ◽

Tianhua Li ◽

Supeng Wang ◽

Shoulu Yang ◽

...

Keyword(s):

Calcium Carbonate ◽

Urea Formaldehyde ◽

Medium Density Fiberboard ◽

Urea Formaldehyde Resin ◽

Formaldehyde Resin ◽

Medium Density ◽

Ionic Bond ◽

Resin Adhesive ◽

Uf Resin ◽

Modified Urea

Reactions between CaCO3 and CH2O2 during polycondensation of UF resin produce Ca2+. Ionic bond complexation binds Ca2+ with UF resin. The UF resin crystalline percentage decreases from 26.86% to 22.71%. IB strength of resin bonded fiberboard increases from 0.75 to 0.94 MPa.

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Effect of spent sulfite liquor on urea-formaldehyde resin performance

Journal of Applied Polymer Science ◽

10.1002/app.47389 ◽

2018 ◽

Vol 136 (17) ◽

pp. 47389 ◽

Cited By ~ 1

Author(s):

Ana Maria Ferreira ◽

João Pereira ◽

Margarida Almeida ◽

João Ferra ◽

Nádia Paiva ◽

...

Keyword(s):

Urea Formaldehyde ◽

Urea Formaldehyde Resin ◽

Formaldehyde Resin ◽

Spent Sulfite Liquor

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Preparation and Characterization of Hexadecane Microcapsule Phase Change Materials by In Situ Polymerization

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.815.367 ◽

2013 ◽

Vol 815 ◽

pp. 367-370 ◽

Cited By ~ 4

Author(s):

Xiao Qiu Song ◽

Yue Xia Li ◽

Jing Wen Wang

Keyword(s):

Particle Size ◽

Phase Change ◽

Phase Change Materials ◽

In Situ Polymerization ◽

Urea Formaldehyde ◽

Agitation Speed ◽

Urea Formaldehyde Resin ◽

Formaldehyde Resin ◽

Mass Ratio

Hexadecane microcapsule phase change materials were prepared by the in-situ polymerization method using hexadecane as core materials, urea-formaldehyde resin and urea-formaldehyde resin modified with melamine as shell materials respectively. Effect of melamine on the properties of microcapsules was studied by FTIR, biomicroscopy (UBM), TGA and HPLC. The influences of system concentration, agitation speed and mass ratio of wall to core were also investigated. The results indicated that hexadecane was successfully coated by the two types of shell materials. The addition of melamine into the urea-formaldehyde resin microcapsule reduced microcapsule particle size and microencapsulation efficiency. The influences of factors such as system concentration, agitation speed and mass ratio of wall to core to different wall materials microcapsules presented different variety trends of the microcapsule particle size.

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