AIP-I-AIP型非离子表面活性剂的合成及在浮选脱墨中的应用

Synthesis of AIP-I-AIP Nonionic Surfactant and Its Application in Flotation Deinking

关键词:  AEO-3  IPDI  PEG  AIP-I-AIP型非离子表面活性剂  脱墨剂

Key Words:AEO-3  IPDI  PEG  AIP-I-AIP nonionic surfactants  deinking agent

摘要:以月桂醇聚氧乙烯醚(AEO-3)、异佛尔酮二异氰酸酯(IPDI)和聚乙二醇(PEG)为原料合成了一系列AIP-I-AIP型非离子表面活性剂。通过单因素和正交实验考察了最佳合成工艺，并对合成产物进行了结构表征和物理性能检测；研究了合成产物作为脱墨剂在浮选法废纸脱墨中的应用，将其与其他低分子表面活性剂复配，再与市售脱墨剂的脱墨效果进行对比。结果表明，n(AEO-3)∶n(IPDI)∶n(PEG)=1∶1.5∶1，反应温度70℃，反应时间2 h，催化剂用量1.0%（对单体总质量分数）时，AIP-I-AIP型非离子表面活性剂可达到较好的脱墨效果；合成产物与脂肪醇聚氧乙烯醚硫酸钠（AES）及AEO-3按一定比例复配，m(AIP-I-AIP)∶m(AES)∶m(AEO-3)=1∶2∶1，当复配脱墨剂用量为0.2%(其他助剂一定)时，脱墨浆白度可达68.6%，残余油墨量为41.4 mm²/m²。

Abstract:A series of nonionic surfactants were synthesized by using lauryl alcohol polyoxyethylene ether(AEO-3), isophorone diisocyanate (IPDI) and polyethylene glycol(PEG) as raw materials. The synthesis process was optimized. The chemical structures of the products were characterized by FT-IR and 1H-NMR, and the physical properties were also determined. The application of the mixed deinking agents in waste paper deinking with flotation process and the comparison between the product and commercial deinking agent were studied. The optimal synthesis condition was determined as follows: the molar ratio of lauryl alcohol polyoxyethylene ether (AEO-3) to isophorone diisocyanate (IPDI) to polyethylene glycol (PEG) to isophorone diisocyanate (IPDI) was 1∶1.5∶1, reaction at 70℃ for 2 h and the amount of the catalyst was 1.0% on the total monomers. When the deinking agents of m(AIP-I-AIP)∶m(AES)∶m(AEO-3)=1∶2∶1 and with dosage 0.2%; the brightness of the deinked pulp was 68.6% and the residual ink concentration was 41.4 mm,sup>2/m².