Aluminophosphate inorganic adhesive (APIA), as a binder for wood-based boards (WBB), is synthesized between Al(OH)₃ and H₃PO₄ in solution with hydrothermal treatment in this study. Aluminophosphate compounds with hierarchical lamellar structure are observed on the fibers’ surface. The rheological behavior analysis reveals that the viscosity of APIA varied with its P/Al molar ratio [n(P)/n(Al)]. P–O–Al bridges are formed during the hydrothermal treatment of the APIA. The amounts of hydrogen bonds are formed between APIA and wood fibers, which could explain the improvement in mechanical properties of the WBB. In this study, the optimal n(P)/n(Al) in APIA is found to be 2.8, where the bonding strength, together with an acceptable viscosity are found at 1.83 MPa and 31.3 m Pa·s, respectively. Thermogravimetric analysis indicates that the residual weight of plywood is 44.97% greater than pure wood fibers, indicating the fire resistance of the WBB in the study is improved.

中文翻译：

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具有多孔性的层状层状铝磷酸盐材料，可作为人造木板的生态友好型无机粘合剂

在Al（OH）₃和H ₃ PO ₄之间合成了铝磷酸盐无机胶粘剂（APIA），作为木板的粘合剂（WBB）在这项研究中采用水热处理的方法。在纤维表面观察到具有分层的层状结构的磷酸铝化合物。流变行为分析表明，APIA的粘度随其P / Al摩尔比[n（P）/ n（Al）]而变化。在APIA的水热处理过程中会形成P–O–Al桥。APIA和木纤维之间形成了氢键，这可以解释WBB的机械性能的改善。在这项研究中，发现APIA中的最佳n（P）/ n（Al）为2.8，其中结合强度和可接受的粘度分别为1.83 MPa和31.3 m Pa·s。热重分析表明，胶合板的残余重量比纯木纤维大44.97％，这表明本研究中WBB的耐火性得到了改善。