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摘要
采用水溶液聚合法,以海藻、丙烯酸为原料,N,N′-亚甲基双丙烯酰胺为交联剂,过硫酸钾为引发剂,制备高吸水性新型海藻生物保水剂,用红外光谱(FT-IR)和扫描电镜(SEM)对产物进行表征,并对产物的吸水及保水性能进行研究。结果表明,当海藻与丙烯酸质量比为3:1,引发剂投加量为1.1%,交联剂用量为0.15%,丙烯酸中和度为70%时,合成的海藻生物保水剂在去离子水中的吸收倍率为600g/g,此时产物的吸收效果达到最佳。FT-IR与SEM分析结果表明,海藻和丙烯酸都参与了聚合反应,产物具有较好的空间网络结构与表面形态。在自然条件下,保水剂吸水8h后趋于饱和,且具有一定的保水性能。8次吸水干燥后,吸水倍率仍能达到初始吸水倍率的85%以上,说明该海藻生物保水剂具有反复利用的价值。
Abstract
Using alga(A) and acrylic acid(AA) as raw materials,N,N′-methylene bisacrylamide(NMBA) as crosslinking agent,potassium persulfate(KP) as initiator,the novel alga superabsorbent polymer was prepared by aqueous solution polymerization.The molecular structure and characteristics of the product were confirmed by fourier transform infrared spectroscopy(FT_IR) and scaning electron microscopy(SEM),and studied its water absorption and water retention performances.The absorbent efficiency of the product reached the highest when the mass ratio of A to AA was 3:1,the amount of KPS was 1.1%,the addition of NMBA was 0.15%,the degree of neutralization of AA was 70%.Under this condition,the absorbency of the product was 600g/g in deionized water.The results of FT_IR and SEM showed that A and AA were involved in the polymerization,and the products had a good spatial network structure and surface morphology.Under natural conditions,it approached saturation after 8 hours,and had a certain water retention performance.The eight times the water absorption could still achieve water absorption after drying over 85% of the initial water absorption,indicated that the superabsorbent polymer with the value of repeated use.
关键词
海藻
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保水剂
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表征
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吸水倍率
Key words
alga
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superabsorbent polymer
/
characterization
/
water absorbency
海藻生物保水剂的制备及性能研究[J].
化工新型材料, 2022, 50(1): 157-160 DOI:10.19817/j.cnki.issn1006-3536.2022.01.032
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基金资助
北京市怀柔区重大科技计划项目海藻生物保水剂和保水地膜的创制和在节水农业的应用研究(NY2019-2)
