机构地区: 广西大学轻工与食品工程学院
出 处: 《中国造纸学报》 2009年第3期67-72,共6页
摘 要: 以己二胺哌啶(HMBTAD)为原料合成了新型受阻胺类光返黄抑制剂——己二胺哌啶氮氧自由基(HMB—TEMPO),详细研究了合成过程中的各种影响因素以及HMB—TEMPO在粉单竹BCTMP中的应用。最佳合成工艺条件为:以乙醇为溶剂,H2O2与HMB—TAD摩尔比为4.0:1,温度70℃,反应总时间10h,其中H2O2滴漏时间3~4h,催化剂Mg(OH)2用量为1.0%,产率达91%以上。与外购商品返黄抑制剂4-OH—TEMPO的对比实验表明,HMB—TEMPO具有较好的性质和返黄抑制效果,更适合竹子化机浆的光诱导返黄抑制。 In this paper, the controlling factors for the synthesis of the novel hindered amine photo-yellowing inhibitor N, N'-bis (2,2,6,6 - tetramethyl-piperidinyloxy) -1,6-hexandiamine ( HMB -TEMPO) by oxidizing N, N'-bis ( 2,2,6,6 -tetramethyl -piperidinyl) -1,6- hexandiamine (HMBTAD) and its application in Bambusa Chungii (bamboo) BCTMP were studied. The optimal conditions of synthesis are as follows: ethanol as solvent, n(H2O2 ):n(HMBTAD) =4.0: 1; reaction temperature 70℃; totally reaction time 10 h, including 3 -4 h of dropping time of H2O2, charge of Mg(OH) 2 as catalyst 1.0% , the yield of the product is over 91%. The results showed that HMB-TEMPO has much better properties than 4-OH-TEMPO, and is more suitable for Bambusa Chungii BCTMP as light-induced yellowing inhibitor.
关 键 词: 竹子化机浆 光诱导返黄抑制剂 氮氧自由基 白度稳定性
领 域: [轻工技术与工程]