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中文摘要: 以油酸钠(NaOL)、丙烯酸(AA)和甲基丙烯磺酸钠(SMAS)为原料进行水溶液自由基聚合，合成了NaOL-AA-SMAS型三元共聚物阴离子表面活性剂，并将其作为脱墨剂的化学成分用于废纸脱墨。以脱墨效果作为评判标准，考察NaOL-AA-SMAS的较佳合成工艺，并研究了其与非离子表面活性剂月桂醇聚氧乙烯醚(AEO9)复配的脱墨效果。对NaOL-AA-SMAS进行结构表征和物理化学性能测试，并将自制及复配脱墨剂与市售脱墨剂的脱墨效果进行对比。结果表明：当n(NaOL)∶n(SMAS)∶n(AA)=1∶1∶3，反应温度为85 ℃，反应时间为5 h，引发剂过硫酸铵(APS)用量为单体总质量的2.5%时，其脱墨效果较好；将NaOL-AA-SMAS与AEO9复配，当m(NaOL-AA-SMAS)∶m(AEO9)=2∶1时，再生纸张白度可达71.9%，残余油墨量为42.3 mm2/m2。
Abstract:A kind of ternary copolymer anionic surfactant NaOL-AA-SMAS was synthesized by aqueous solution free radical polymerization with sodium oleate (NaOL), acrylic acid (AA) and sodium methallyl sulfonate (SMAS) as starting materials. The product was applied as an ingredient of waste paper deinking agent. Optimization of conditions for the preparation of the product was conducted taking the deinking effect as criteria. Further, the product was blended with a nonionic surfactant polyethoxy lauryl ether (AEO9) and the deinking efficacy of the blend was examined. Structure of the product was characterized by FT-IR; the molecular weight and its distribution of the product were measured by GPC; and the deinking efficacy of deinking agents containing the product or the blend, and purchased from market was tested and compared. Results showed that the synthesis process conditions, which shows the optimal deinking effect are as follows: n(NaOL)∶n(SMAS)∶n(AA)=1∶1∶3; reaction temperature, 85 ℃; reaction time, 5 h; w(APS)=2.5% (the mass of total reactants). When the blended deinking agent is formulated in accordance with m(NaOL-AA-SMAS)∶m(AEO9)=2∶1, the brightness of the deinked waste paper can reach to 71.9% and the residual ink concentration is 42.3 mm2/m2.
keywords: deinking agent sodium oleate acrylic acid sodium methallyl sulfonate copolymer brightness residual ink concentration
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|MA Yan||Key Laboratory of Auxiliary Chemistry & Technology for Chemical Industry, Ministry of Education, Shaanxi University of Science & Technology, Xi’an|