摘要
以腐植酸钾(KHA)、甲基纤维素(MC)、羟丙基甲基纤维素(HPMC)、羧甲基纤维素(CMC)等为主要原料,通过磁力搅拌法和冷冻干燥技术制备得到KHA/MC、KHA/HPMC、KHA/CMC三种海绵基质材料。利用傅里叶红外光谱仪(FTIR)、扫描电子显微镜(SEM)对材料进行了表征,并考察了三者对自来水的吸液倍率、保水性及耐酸碱性。结果表明:3种海绵基质形成互穿交联网络,KHA/CMC的网孔结构较前两者均匀致密;KHA/MC、KHA/HPMC、KHA/CMC在2.5 h后的饱和吸自来水率分别为207.9,230.1,292.1 g/g,40℃下、18 h后的保水率分别为27.9%,35.4%和59.6%,说明KHA/CMC型海绵基质具有较好的吸水保水性;KHA/CMC在pH=5~8的范围内吸水倍率都大于200 g/g,pH=7的时候达到最高吸水率279.7 g/g,均高于其他两种合成材料,说明KHA/CMC受pH的影响不太显著。
Potassium humate(KHA),methyl cellulose(MC),hydroxypropyl methylcellulose(HPMC),carboxymethyl cellulose(CMC)were used as the main raw materials to prepare the sponge matrix materials of KHA/MC,KHA/HPMC and KHA/CMC by magnetic stirring method and freeze drying technology.The materials were characterized by FTIR and SEM.The water absorption ratio,water retention at 40℃and acid and alkali resistance were investigated.The results showed that the three sponge matrix formed an interpenetrating cross-linking network.The mesh structure of KHA/CMC is more uniform than the KHA/MC and KHA/HPMC.The saturated water absorption rates of KHA/MC,KHA/HPMC and KHA/CMC after 2.5 h are respectively 207.9,230.1,292.1 g/g.The water retention rate after 18 h was 27.9%,35.4%and 59.6%,respectively,indicating that the KHA/CMC sponge matrix has better water absorption and water retention.KHA/CMC also has a water absorption ratio of more than 200 g/g in the range of pH=5~8,and the highest water absorption rate of 279.7 g/g at pH=7,which is higher than the other two synthetic materials,which indicates that the influence of pH on KHA/CMC is not significant.
作者
宋洁
柯如媛
牛育华
王晨
马展
SONG Jie;KE Ru-yuan;NIU Yu-hua;WANG Chen;MA Zhan(College of Chemistry and Chemical Engineering,Shaanxi University of Science & Technology,Xi’an 710021,China;Shaanxi Research Institute of Agricultural Products Processing Technology,Xi’an 710021,China)
出处
《应用化工》
CAS
CSCD
北大核心
2020年第6期1344-1347,1353,共5页
Applied Chemical Industry
基金
国家自然科学基金(51803114)
陕西省科技厅重点研发计划项目(2018ZDXM-NY-059)
西安市科技计划项目(201806116YF04NC12(6))
西安市科技创新引导项目(201805023YD1CG7(4))
西安市科技计划项目(20193053 YF041NS041)
未央区科技项目(201829)。
关键词
腐植酸钾
纤维素
冷冻干燥
吸水海绵基质
potassium humate
cellulose
freeze-dried
water-absorbent sponge matrix
作者简介
宋洁(1982-),女,陕西西安人,陕西科技大学副教授,博士后,从事腐植酸大分子及可降解材料的研究,电话:15934894171,E-mail:sj206962@163.com。
