Particulate reinforcement and formaldehyde adsorption of modified nanocrystalline cellulose in urea-formaldehyde resin adhesive

2013 ◽  
Vol 27 (9) ◽  
pp. 1023-1031 ◽  
Author(s):  
Hao Zhang ◽  
Ying She ◽  
Shuping Song ◽  
Qian Lang ◽  
Junwen Pu
Keyword(s):  
Urea Formaldehyde ◽  
Nanocrystalline Cellulose ◽  
Urea Formaldehyde Resin ◽  
Formaldehyde Resin ◽  
Resin Adhesive ◽  
Particulate Reinforcement ◽  
Formaldehyde Adsorption

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

RSC Advances ◽  
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.

scholarly journals The Impact of Nanoparticles and Moisture Content on Bonding Strength of Urea Formaldehyde Resin Adhesive

2018 ◽  
Vol 69 (3) ◽  
pp. 247-252
Author(s):  
Timuçin Bardak ◽  
Eser Sozen ◽  
Kadir Kayahan ◽  
Selahattin Bardak
Keyword(s):  
Moisture Content ◽  
Bonding Strength ◽  
Urea Formaldehyde ◽  
Urea Formaldehyde Resin ◽  
Formaldehyde Resin ◽  
Resin Adhesive ◽  
The Impact

The Impact of Different Dosage of Additives on the UF Resin Used in Plywood

2011 ◽  
Vol 197-198 ◽  
pp. 147-150 ◽  
Author(s):  
Wei Wang ◽  
Li Bin Zhu ◽  
Ji You Gu ◽  
Xiang Li Weng ◽  
Hai Yan Tan
Keyword(s):  
Urea Formaldehyde ◽  
Formaldehyde Emission ◽  
Urea Formaldehyde Resin ◽  
Formaldehyde Resin ◽  
Synthetic Process ◽  
Resin Adhesive ◽  
Environmental Friendly ◽  
Uf Resin ◽  
Comprehensive Performance ◽  
The Impact

Through the study of the effects of different dosage of additives on the properties of urea formaldehyde resin adhesive prepared at low mole ratio of formaldehyde/urea, optimize the synthetic process of the UF resin which is used at the E0 grade plywood. The results showed that the product synthesized under the following condition: the mole ratio of formaldehyde/urea is 0.99:1, the dosage of the specific additive is 1.0% and that of melamine is 3-4%, had a good comprehensive performance and the formaldehyde emission of the plywood meets the E0 grade which is environmental-friendly.

Easy procedure to prepare nitrogen-containing activated carbons for supercapacitors

RSC Advances ◽  
2014 ◽  
Vol 4 (73) ◽  
pp. 39037-39044 ◽  
Author(s):  
Tong-Xin Shang ◽  
Ming-Yang Zhang ◽  
Xiao-Juan Jin
Keyword(s):  
Activated Carbons ◽  
Urea Formaldehyde ◽  
Medium Density Fiberboard ◽  
Urea Formaldehyde Resin ◽  
Formaldehyde Resin ◽  
Medium Density ◽  
Resin Adhesive

The urea-formaldehyde resin adhesive in waste medium density fiberboard play a role in modifying the activated carbons.

Research Progress and Prospect of Inorganic Filler for Urea-Formaldehyde Resin Adhesive

2012 ◽  
Vol 427 ◽  
pp. 148-152 ◽  
Author(s):  
Qing Guo Tang ◽  
Fei Wang ◽  
Hong Xia Shao ◽  
Yan Ding
Keyword(s):  
Low Cost ◽  
Urea Formaldehyde ◽  
Urea Formaldehyde Resin ◽  
Research Progress ◽  
Inorganic Filler ◽  
Formaldehyde Resin ◽  
Adhesive Properties ◽  
Resin Adhesive ◽  
Oxide Powders ◽  
Research Achievement

The artificial plywood materials were prepared using natural minerals and inorganic oxide powders as the main fillers for urea-formaldehyde resin adhesive instead of flour. The method mentioned above has advantages in saving food resources, reducing cost of plywood, improving the quality of plywood and decreasing the release amount of free formaldehyde. On the basis of the research achievement both domestic, foreign and our experimental data, this paper mainly discussed the effect of filler on adhesive properties, bond strength of plywood, and free formaldehyde content, which provided reference for development of green environmental protection and low cost urea-formaldehyde resin adhesive minerals composite filler.

Study on Urea-Formaldehyde Resin for Glass Wool Products

2013 ◽  
Vol 774-776 ◽  
pp. 1232-1236
Author(s):  
Nan Zhe Zhang
Keyword(s):  
Polyvinyl Alcohol ◽  
Water Resistance ◽  
Urea Formaldehyde ◽  
Glass Wool ◽  
Orthogonal Test ◽  
Urea Formaldehyde Resin ◽  
Molar Ratio ◽  
Formaldehyde Resin ◽  
Resin Adhesive ◽  
Uf Resin

In order to prepare urea-formaldehyde (UF) resin adhesive with good performance for glass wool products, we used polyvinyl alcohol (PVA), p-toluenesulfonamide (PTSA) and methanol to modify UF resin, optimized the molar ratio of formaldehyde (F) / urea (U) and reaction components ratio by orthogonal test, reduced the content of free formaldehyde in UF resin, and enhanced the water resistance, flexibility and stability of UF resin.

Fabrication, performances, and reaction mechanism of urea–formaldehyde resin adhesive with isocyanate

2013 ◽  
Vol 27 (20) ◽  
pp. 2191-2203 ◽  
Author(s):  
Zhang Yanhua ◽  
Gu Jiyou ◽  
Tan Haiyan ◽  
Jiang XiangKai ◽  
Shi Junyou ◽  
...  
Keyword(s):  
Reaction Mechanism ◽  
Urea Formaldehyde ◽  
Urea Formaldehyde Resin ◽  
Formaldehyde Resin ◽  
Resin Adhesive

Study on Synthetic Process of Low Toxic Urea-Formaldehyde Resin

2012 ◽  
Vol 621 ◽  
pp. 79-82
Author(s):  
Gui Hua Chen ◽  
Jian Han ◽  
Xiao Huan Zhang
Keyword(s):  
Bonding Strength ◽  
Ph Value ◽  
Urea Formaldehyde ◽  
Formaldehyde Emission ◽  
Urea Formaldehyde Resin ◽  
Experimental Results ◽  
Formaldehyde Resin ◽  
Synthetic Process ◽  
Resin Adhesive ◽  
Low Toxic

This study aimed at exploring a producing method of urea-formaldehyde resin that contained low free formaldehyde. Effects of the pH value of addition stage, the pH value and the temperature of polycondensation stage on the properties of the resin were analyzed. The experimental results showed that controlling the pH value of addition stage to 7.5-8.0, regulating the pH value of polycondensation stage to 4.8-5.1, and keeping the temperature of polycondensation stage to 88-92°C, a low toxic urea-formaldehyde resin adhesive was obtained which contained free formaldehyde 0.08%. Using this resin adhesive, the bonding strength of the plywood reached 1.7MPa, formaldehyde emission of the plywood was 0.7mg/l, reaching the grade E1.

Modified Nanocrystalline Cellulose Used for Improving Formaldehyde Emission and Bonding Strength of Urea Formaldehyde Resin Adhesive

2013 ◽  
Vol 562-565 ◽  
pp. 846-851
Author(s):  
Hao Zhang ◽  
Ying She ◽  
Shu Ping Song ◽  
Jun Wen Pu
Keyword(s):  
Bonding Strength ◽  
Urea Formaldehyde ◽  
Formaldehyde Emission ◽  
Nanocrystalline Cellulose ◽  
National Standards ◽  
Control Group ◽  
Formaldehyde Resin ◽  
Hydroxyl Groups ◽  
Resin Adhesive ◽  
Uf Resin

Nanocrystalline cellulose (NCC) was used for improving the formaldehyde (HCHO) emission and bonding strength of urea formaldehyde (UF) resin adhesive in fiberboard and plywood. The original NCC was modified by 3-aminopropyltriethoxysilane (APTES) and the wetting property with UF resin adhesive was improved by 26.4%. The UF resin adhesive with modified NCC was characterized by X-ray powder diffraction (XRD), thermogravimetric analysis (TG) and Fourier transform infrared (FT-IR). The crystal region of UF resin adhesive was influenced by NCC and the diffraction intensity of the peak at 2θ = 22.82° was enhanced significantly. The thermal stability of UF resin adhesive with 1.0% modified NCC increased by 4.9%. And modified NCC led hydroxyl groups into the UF resin adhesive. HCHO emission and bonding strength of the UF resin adhesive with modified NCC were tested according to Chinese National Standards GB/T 17657-1999 and GB/T 9846-2004. The HCHO emission of fiberboard and plywood with 1.5% modified NCC decreased by 13.0% and 53.2%, respectively. The bonding strength of fiberboard increased by 158.3% (from 0.12 MPa of control group to 0.31 MPa of fiberboard with 1.5% modified NCC), while 1.5% modified NCC led to a 23.6% increase in the plywood.

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