糠醛渣分级转化制备分散剂和吸水性树脂  

Preparation of Dispersant and Water Absorption Resin by Staged Conversion from Furfural Residue

作　　者：桂港 王小茹 张璐[1] 杜朝军[3] 陈玮 常春[1] GUI Gang;WANG Xiaoru;ZHANG Lu;DU Chaojun;CHEN Wei;CHANG Chun(School of Chemical Engineering,Zhengzhou University,Zhengzhou 450001,China;School of Mechanical and Power Engineering,Zhengzhou University,Zhengzhou 450001,China;Nanyang Research Institute of Zhengzhou University,Nanyang Institute of Technology,Nanyang 473004,China;Henan Key Laboratory of Green Manufacturing of Biobased Chemicals,Puyang 457000,China)

机构地区：[1]郑州大学化工学院,河南郑州450001 [2]郑州大学机械与动力工程学院,河南郑州450001 [3]南阳理工学院郑州大学南阳研究院,河南南阳473004 [4]河南省生物基化学品绿色制造重点实验室,河南濮阳457000

出　　处：《林产化学与工业》2023年第2期80-88,共9页Chemistry and Industry of Forest Products

基　　金：国家自然科学基金资助项目(22178328);南阳市协同创新重大专项(郑州大学南阳研究院)项目(NRIZU2020CIP0006);郑州大学大学生创新创业训练计划项目(S202110459160)。

摘　　要：采用分级转化策略,首先将糠醛渣中的木质素组分制备成木质素基分散剂(LS),在糠醛渣用量100 g、去离子水用量1000 g,反应温度70℃、反应时间3 h、氢氧化钠用量6.5 g、亚硫酸钠1.6 g、甲醛0.2 g的条件下得到的木质素基分散剂的分散力为105%。以分离得到的纤维素残渣制备吸水性树脂,探究了反应温度、引发剂过硫酸铵(APS)用量、交联剂N,N′-亚甲基双丙烯酰胺(MBA)用量、复合单体丙烯酸(AA)和丙烯酰胺(AM)总用量对吸水性树脂吸水倍率的影响。在丙烯酸中和度为60%,引发时间0.5 h,复合单体用量9 g,引发剂用量1.3 g,交联剂用量0.05 g,反应温度52℃,接枝共聚反应时间3 h的优化条件下,吸水性树脂的吸水倍率达到64.6 g/g。FT-IR分析表明AM、AA和纤维素残渣发生了接枝反应;SEM表明反应生成了交联网状结构的产物;热重分析说明AA和AM的引入提高了吸水性树脂的热稳定性;XRD表明AA、AM的接枝反应发生在纤维素残渣的骨架上。Using the staged conversion strategy,the lignin component in furfural residue(FR)was first prepared into lignin-based dispersant(LS).When the mass of FR was 100 g,the mass of the deionized water was 1000 g,the reaction temperature was 70℃,the reaction time was 3 h,the dosage of sodium hydroxide was 6.5 g,sodium sulfite dosage was 1.6 g,and formaldehyde dosage was 0.2 g,the dispersing force of LS was 105%.Subsequently,water absorption resin was further prepared from the separated cellulose residue.The effects of the reaction temperature,the amount of initiator ammonium sulfate(APS),crosslinking agent N,N′-methylene bisacrylamide(MBA)and the total amount of complex monomer acrylic acid(AA)and acrylamide(AM)on the water absorption of the water-absorbing resin were investigated.Under the optimum conditions of the neutralization degree of acrylic acid of 60%,the initiation time of 0.5 h,the amount of complex monomer of 9 g,the amount of initiator of 1.3 g,crosslinking agent dosage of 0.05 g,the reaction temperature of 52℃,and the graft copolymerization reaction time of 3 h,the water absorption of the water absorbent resin reached 64.6 g/g.FT-IR analysis showed that the grafting reaction of AM,AA and cellulose residue occurred.SEM images showed that the product with cross-linked network structure was formed in the reaction;thermogravimetric analysis showed that the introduction of AA and AM improved the thermal stability of the water absorbent resin;XRD revealed that the grafting reaction of AA and AM took place on the skeleton of cellulose residue.

关 键 词：糠醛渣 分级转化 分散剂 吸水性树脂 

分 类 号：TQ35[化学工程]