超支化聚合物改性明胶胶粘剂的制备及性能

Synthesis and Application of Hyperbranched Polymer Modified Gelatin Adhesives

摘要:

以二乙醇胺、丙烯酸甲酯、三羟甲基丙烷以及环氧氯丙烷为原料，合成不同代数的端环氧基超支化聚（胺-酯）(EHPAE)。其后，以从制革废弃物中提取的明胶为原料，不同代数的EHPAE分别作为交联单体进行改性，制得一种环保型鞋用或包袋用胶粘剂。采用FT-IR光谱，1H-NMR谱图和GPC对超支化聚合物和胶粘剂的结构及相对分子质量分布进行表征，之后对胶粘剂的粘接性能进行测定，结果表明：EHPAE-Ⅲ较其余两者的改性效果更为明显，当EHPAE-Ⅲ用量为明胶用量的30％时，改性后胶粘剂的固含量由11.42%提高到了30.33%，同时剪切强度为2.216 MPa，T-剥离强度为3.375 N/mm，水接触角为100.9o，相较于市售胶粘剂的剪切强度 (1.88 MPa)，T-剥离强度 (2.864 N/mm)，水接触角(84.8o)，制备得到胶粘剂的粘接性能和疏水性均更优。

Abstract:

A gelatin-based adhesive was prepared by the diethanolamine, methyl acrylate, trimethylolpropane and epichlorohydrin were used as raw materials to synthesize the different generation of epoxy-terminated hyperbranched poly (amine-ester) (EHPAE). And then, with gelatin extracted from leather wastes as main material and the different generation of EHPAE are respectively as cross-linking monomer, an environmental-friendly of adhesives for footwear or bags were success-fully synthesized. The structure and relative molecular mass distribution of hyperbranched polymer and adhesive were characterized by FT-IR, 1H-NMR and GPC, moreover, the bonding performance of adhesive were measured. The results showed that the modification effect of EHPAE-III was better than the others, when the amount of EHPAE was 30% of the gelatin, the solid content of the modified adhesive was increased from 11.42% to 30.33%. meanwhile, the shear strength and T-peel strength of the adhesive was improved to 2.216 MPa and 3.375 MPa, respectively, and the water contact angle was 100.9o. The adhesive properties and hydrophobicity of the prepared adhesive were better than the commercial available adhesive, in which the shear strength and T-peel strength are 1.88 MPa and 2.864 N/mm, the water contact angle was 84.8o.