Psochia Eleni A, Karagiannidis Emmanouil, Athanasiadou Eleftheria, Triantafyllidis Konstantinos S
Department of Chemistry, Aristotle University of Thessaloniki, 54214 Thessaloniki, Greece.
CHIMAR HELLAS S.A., 15 Km National Road, Thessaloniki-Polygyros, 57001 Thessaloniki, Greece.
Molecules. 2025 Jul 10;30(14):2911. doi: 10.3390/molecules30142911.
In this work, we present the fabrication of low-cost, stable nanocellulose colloidal suspensions with an average particle size of approximately 160 nm, produced via a straightforward, solvent-free ultrasonication process that eliminates the need for corrosive chemicals or energy-intensive mechanical treatments. The resulting nanocellulose suspensions were utilized as reinforcing additives in urea-formaldehyde (UF) resins, which were subsequently applied in the production of particle boards. This approach addresses the increasing EU regulatory constraints regarding low formaldehyde-to-urea (F/U) molar ratios and the broader need for biobased, eco-friendly alternatives in the wood adhesive industry. Mechanical testing of the nanocellulose reinforced boards revealed notable improvements in the internal bond strength and modulus of rupture, along with a significant decrease in formaldehyde release compared to boards produced with conventional UF resins. These findings highlight the potential of ultrasonication-derived nanocellulose as an environmentally friendly, cost-effective additive to enhance the mechanical performance and reduce the environmental impact of UF-based wood composites.
在这项工作中，我们展示了低成本、稳定的纳米纤维素胶体悬浮液的制备方法，其平均粒径约为160纳米，通过简单的无溶剂超声处理过程生产，该过程无需腐蚀性化学品或耗能的机械处理。所得的纳米纤维素悬浮液被用作脲醛（UF）树脂中的增强添加剂，随后应用于刨花板的生产。这种方法解决了欧盟对低甲醛与尿素（F/U）摩尔比日益严格的监管限制，以及木材胶粘剂行业对生物基、环保替代品的更广泛需求。对纳米纤维素增强板的力学测试表明，与使用传统UF树脂生产的板材相比，其内部结合强度和断裂模量有显著提高，同时甲醛释放量显著降低。这些发现突出了超声处理衍生的纳米纤维素作为一种环保、经济高效的添加剂的潜力，可提高基于UF的木材复合材料的力学性能并减少其对环境的影响。
