摘要
为检测PAE湿强剂中氯丙醇的含量,本研究建立了气相色谱-质谱联用法(GC-MS),检测PAE湿强剂中1,3-二氯-2-丙醇(1,3-DCP)与3-氯-1,2-丙二醇(3-MCPD)的含量,并进行了方法学验证,同时探究了PAE湿强剂中氯丙醇含量与纸张水提取液中氯丙醇含量之间的关系.本研究对4批次某款湿强剂进行检测,发现随着湿强剂制造工艺的改进,1,3-DCP与3-MCPD的含量均有明显的下降.调整湿强剂和助留剂的添加量,抄造不同批次的纸张,同时测定纸张水提取液中的氯丙醇含量与纸张的抗张强度.结果显示,纸张水提取液中的氯丙醇含量与湿强剂中氯丙醇含量呈正相关关系,与湿强剂添加量成正比;在助留剂实际添加量超过厂家推荐添加量的情况下,纸张水提取液中的氯丙醇含量与助留剂添加量无明显关系,但会导致纸张湿、干抗张指数下降.
Abstract
In order to detect the chloropropanol content in the polyamide-epichlorohydrin(PAE)wet strength agents,this study established gas chromatography-mass spectrometry(GC-MS)method to detect the content of l,3-dichloro-2-propanol(1,3-DCP)and 3-chloro-1,2-pro-panediol(3-MCPD).At the same time,the relationship between chloropropanol content in PAE wet strength agents and in paper water ex-tractions was studied by adding wet strength agents.The content of 1,3-DCP and 3-MCPD decreased significantly with the improvement of the manufacturing process of a certain wet strength agent in 4 batches.The chloropropanol content in water extraction and the tensile strength of the papers were tested by adjusting the dosage of wet strength agent and retention aid.The results showed that the chloropropanol content in paper water extraction was positively correlated with its content in the wet strength agent and was directly proportional to the dosage of wet strength agent.When the actual dosage of retention aid exceeded the recommended dosage of manufacturer,the extracted chloropropanol content showed no significant relationship with the retention aid dosage,but it would cause the wet and dry tensile strength of paper to de-cline.
维普
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