摘要
为验证竹屑液化残渣(BLR)作为纤维素来源用于制备改性高吸水树脂的可行性,本研究通过微波辐照法,以过硫酸钾(KPS)为自由基引发剂,在交联剂N,N-亚甲基双丙烯酰胺(MBA)的作用下,将竹屑液化残渣(BLR)、丙烯酸(AA)、聚乙烯醇(PVA)、2-丙烯酰胺-2-甲基丙磺酸(AMPS)进行四元共聚反应制备BLR改性高吸水树脂(BLR-P(AAAMPS)/PVA),采用傅里叶变换红外光谱(FT-IR)仪、热重分析(TG)仪和场发射扫描电子显微镜(SEM)对产物结构和形貌进行表征,并通过单因素试验和正交试验优化制备工艺。研究结果表明:BLR的加入增加了BLR-P(AA-AMPS)/PVA树脂内部多孔结构,树脂的吸水性能明显改善。树脂的较佳制备工艺条件为BLR用量0.35 g,微波辐照功率500 W,微波辐照时间12 min,KPS用量0.6%,MBA用量0.1%,AA中和度85%,PVA用量1.5%,该条件下制备的树脂其吸蒸馏水倍率最高可达1526 g/g,吸0.9%(质量分数)氯化钠的倍率可达114 g/g,在5000 r/min时离心保水率达到60%,吸水过程符合二级动力学模型。
In order to verify the feasibility of bamboo liquefaction residue as cellulose source to modify highly absorbent resin,this study was carried out by microwave irradiation method,using potassium persulfate(KPS)as free radical initiator,and under the action of N,N-methylene bisacrylamide(MBA).Bamboo liquefaction residue(BLR),acrylic acid(AA),polyvinyl alcohol(PVA)and 2-acrylami-2-methylpropanesulfonic acid(AMPS)were subjected to four-element copolymerization.The structure and morphology of the products were characterized by Fourier transform infrared spectroscopy(FT-IR),thermogravimetric analysis(TG)and scanning electron microscopy(SEM).The optimum preparation process of BLR modified highly absorbent resin(BLRP(AA-AMPS)/PVA)was determined by single factor and orthogonal test.The results showed that the addition of BLR increased the internal porous structure of BLR-P(AA-AMPS)/PVA resin,and the water absorption property of the resin was significantly improved.The optimal processing conditions of BLR-P(AA-AMPS)/PVA resin were as follows:microwave irradiation power of 500 W,microwave irradiation time of 12 min,initiator dosage of 0.6%,crosslinking agent dosage of 0.1%,acrylic neutralization degree of 85%,and polyvinyl alcohol dosage of 1.5%,and BLR dosage of 0.35 g.Under the optimal conditions,the absorption ratio of distilled water could reach 1526 g/g,the absorption ratio of normal saline was up to 114 g/g,and the centrifugal water retention rate was 60%at 5000 r/min.The water absorption process accorded with the second-order kinetic model.
作者
吴斌
冯涌
漆丽萍
唐宏伟
房桂干
WU Bin;FENG Yong;QI Liping;TANG Hongwei;FANG Guigan(Institute of Chemical Industry of Forest Products,CAF,Key Lab.of Biomass Energy and Material,Jiangsu Province,Key Lab.of Chemical Engineering of Forest Products,National Forestry and Grassland Administration,National Engineering Research Center of Low-Carbon Processing and Utilization of Forest Biomass,Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources,Nanjing 210042,China;Sichuan Academy of Forestry,Chengdu 610081,China;College of Chemistry and Material Science,Sichuan Normal University,Chengdu 610066,China)
出处
《生物质化学工程》
CAS
2024年第3期1-9,共9页
Biomass Chemical Engineering
基金
四川省重点研发项目(2023YFS0363)。
关键词
竹屑液化残渣
微波辐射法
高吸水树脂
bamboo liquefaction residue
microwave radiation method
superabsorbent resin
