【摘要】 探讨一种无污染、无废弃物排放的胶黏剂合成工艺———碱性的杉木液化物与少量的苯酚、甲醛合成一种高性能的木材胶黏剂。检测胶黏剂的游离苯酚和游离甲醛、胶合板的胶合性能和甲醛释放量,并与工业用酚醛树脂进行性能比对。结果表明:杉木液化物-苯酚甲醛胶黏剂具有较低的游离苯酚和游离甲醛,其制得的胶合板具有更好的胶接性能和更低的甲醛释放量。红外分析结果表明:杉木液化物与苯酚、甲醛发生了化学反应,并生成了高聚物化学结构。DSC结果显示:杉木液化物-苯酚甲醛胶黏剂需要更高的固化温度,但不影响其实用性。更多还原

【Abstract】 A novel composite adhesive was synthesized in our experiment,which revealed the new zero-waste and zeropollution adhesive synthetic by blending of alkaline Chinese fir(Cunninghamia lanceolata)liquid with a small amount of phenol-formaldehyde.The synthetic Chinese fir-based adhesive showed better physical properties of low free phenol as well as free formaldehyde content compared with control PF resin.Plywood of three layers bonded with the synthesized adhesives was made to determine bond strength and formaldehyde emission.The Chinese fir-based adhesive has been proved to reduce the formaldehyde emission significantly without decreasing the bond strength at all.The FT-IR analysis confirmed the polymer chemistry structure has been built by the Chinese fir liquid reacting with formaldehyde and phenol.The DSC results indicated that although the Chinese fir-based adhesive’s curing need higher temperature than the PF resin,the higher curing temperature hardly cripple the availability of Chinese fir-based adhesive.更多还原