蔗渣纤维制备高吸水树脂研究
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摘要
以甘蔗渣为原料,通过超声波辅助碱性双氧水法进行预处理,接枝改性制备具有高吸水、保水性能的高吸水树脂.研究了丙烯酸/蔗渣配比、引发剂用量、交联剂用量、中和度等因素对高吸水树脂吸水性能的影响;采用傅里叶红外光谱(IR)、X射线衍射(XRD)、扫描电镜(SEM)分别对预处理前后蔗渣及高吸水树脂进行接枝情况、结晶情况、结构与形貌进行表征.结果表明:最佳条件为丙烯酸/蔗渣配比10 mL/g、引发剂用量0.12 g、交联剂用量4 mg、中和度80%;对蔗渣纤维的预处理能够明显提高树脂的吸水性能;室温放置72 h,对去离子水的保水率为97%.该树脂对去离子水、自来水、0.9%NaCl溶液的吸水倍率分别为413、104和14 g/g.
Bagasse was used as raw material to prepare super absorbent resin with a high water absorption and retention by pretreatment-ultrasonic assisted aquae hydrogenii dioxidi treatment and graft modification. The effects of the ratio of acrylic acid/bagasse, the dosage of initiator, the amount of crosslinker, the neutralization degree on water absorption capacity of resin were studied. IR, XRD and SEM were used to investigate the grafting situation, crystallization, structure and morphology of the bagasse before and after pretreatment and super absorbent resin. The results show that the optimum condition is that the ratio of acrylic acid/bagasse, the dosage of initiator, the amount of crosslinker, and the neutralization degree are 10 mL/g, 0.12 g, 4 mg and 80%, respectively. The pretreatment of bagasse fiber can obviously improve the water absorption of resin. The water absorption capacities of resin in deionized water, running water and 0.9%NaCl solution are 413, 104 and 14 g/g, respectively. The water retention rate of resin reaches 97% by treating the deionized water saturated resin when placed at room temperature for 72 hours.
Bagasse was used as raw material to prepare super absorbent resin with a high water absorption and retention by pretreatment-ultrasonic assisted aquae hydrogenii dioxidi treatment and graft modification. The effects of the ratio of acrylic acid/bagasse, the dosage of initiator, the amount of crosslinker, the neutralization degree on water absorption capacity of resin were studied. IR, XRD and SEM were used to investigate the grafting situation, crystallization, structure and morphology of the bagasse before and after pretreatment and super absorbent resin. The results show that the optimum condition is that the ratio of acrylic acid/bagasse, the dosage of initiator, the amount of crosslinker, and the neutralization degree are 10 mL/g, 0.12 g, 4 mg and 80%, respectively. The pretreatment of bagasse fiber can obviously improve the water absorption of resin. The water absorption capacities of resin in deionized water, running water and 0.9%NaCl solution are 413, 104 and 14 g/g, respectively. The water retention rate of resin reaches 97% by treating the deionized water saturated resin when placed at room temperature for 72 hours.
引文
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[2] Fanta G F,Weaver M O,Doane W M.Polymeric absorbent seeks problems to solve [J].Chemtech,1974,4:675.
[3] Wolf F,Mallon H J,Gerlach H.Efficiency of different metal salt initiators on graft polymerization of acrylonitrile on potato starch [J].Starch Staerke,1980,32:229.
[4] 谢建军,韩心强,何新建.PAAM高吸水树脂的土壤保水性能 [J].材料工程,2010(3):84.
[5] 王丹,宋湛谦,商士斌,等.高分子材料在化学固沙中的应用 [J].生物质化学工程,2006,40:44.
[6] Wang D,Song Z Q,Shang S B.Synthesis of amphoteric superabsorbent polymer modified by wheat straw cellulose [J].Chem Indust Forest Prod,2006,26:33.
[7] 王存国,何丽霞,董献国,等.富含纤维素类农作物秆与丙烯酸接枝共聚制备高倍率吸水树脂 [J].高等学校化学学报,2007,28:1787.
[8] 刘维,王存国,何丽霞,等.用农作物秸秆制备高吸水性树脂 [J].塑料科技,2007,35:60.
[9] Mosier N,Wyman C,Dale B,et al.Features of promising technologies for pretreatment of lignocellulosic biomass [J].Bioresource Technol,2005,96:673.
[10] Karlsson J O,Gatenholm P.Cellulose fibre-supported pH-sensitive hydrogels [J].Polymer,1999,40:379.
[11] 黄祖强,梁兴唐,高利,等.机械活化甘蔗渣与丙烯酸(钠)的接枝共聚反应 [J].化工学报,2009,60:1573.
[12] 王淋靓,张思原,梁琼元,等.超声波辅助碱性双氧水法提取甘蔗渣纤维素最优工艺探讨 [J].南方农业学报,2013,44:1008.
[13] Zhu S,Hamielec A E.Heat effects for free-radical polymerization in glass ampoule reactors [J].Polymer,1991,32:3021.
[14] Gupta K C,Khandekar K.Temperature-responsive cellulose by ceric(IV) ion-initiated graft copolimerization of N-isopropylacrylamide [J].Biomacromolecules,2003,4:758.
[15] Choi H S,Kim Y S,Zhang Y,et al.Plasma-induced graft co-polymerization of acrylic acid onto the polyurethane surface [J].Surf Coat Technol,2004,182:55.
[16] 刘平生,李利,周宁琳,等.蒙脱土/聚丙烯酸高吸水性树脂的合成 [J].复合材料学报,2006,23:44.
[17] 聂明,谭世语,王孝华.接枝共聚法合成高吸水性树脂 [J].高分子材料科学与工程,2005,21:84.
[18] 谢静思,张熙,代华,等.耐水解高吸水树脂的合成与性能研究 [J].化学研究与应用,2010,22:934.
[19] Brienzo M,Siqueira A F,Milagres A M F.Search for optimum conditions of sugarcane bagasse hemicellulose extraction [J].Biochem Eng J,2009,46:199.
[20] Lepifre S,Froment M,Cazaux F,et al.Lignin incorporation combined with electron-beam irradiation improves the surface water resistance of starch films [J].Biomacromolecules,2004,5:1678.引用本文格式:中文:张理元,刘娇,由耀辉,等.蔗渣纤维制备高吸水树脂研究 [J].四川大学学报:自然科学版,2019,56:523.英文:Zhang L Y,Liu J,You Y H,et al.Study on preparation of super absorbent resin from bagasse fiber [J].J Sichuan Univ:Nat Sci Ed,2019,56:523.