Binary grafted starch was prepared with corn starch,acrylic acid (AA) and methacrylate (MA) by using horseradish peroxidase (HRP)/acetyl acetone (ACAC)/hydrogen peroxide (H2O2).The effects of grafting reaction conditions on grafting and grafting properties were studied.The results showed that AA and MA successfully grafted onto starch.The best reaction condition was t=4h,HRP enzyme concentration 12U/mL,monomer/starch ratio=4∶6,AA/MA feeding molar ratio of 3∶7.The graft rate was 39.16% and graft efficiency was 30.26%.The viscosity and viscoelasticity of starch solution were increased after enzymatic modification.In addition,with the increase of acrylic feeding ratio,the hydrophilicity and fracture strength of grafted starch were increased,while the elongation of fracture was decreased,and the grafting products had certain bacteriostatic properties.
[1] Tester R F,Karkalas J,Qi X.Starch-composition,fine structure and architecture[J].Journal of Cereal Science,2004,39(2):151-165.
[2] 陈密峰,朱琳晖,吉彦.引发剂在淀粉接枝反应中的研究与应用[J].化学世界,2001,42(3):153-156.
[3] Zhang H,Wang J K,Wang R,et al.Microwave irradiated synthesis of grafted cationic starch:synthesis,characterization,application,and biodegradation[J].Journal of Applied Polymer Science,2013,130(3):1645-1652.
[4] 徐玲,杨成,段彬,等.脂肪酶催化合成淀粉/聚己内酯接枝共聚物[J].高分子材料科学与工程,2009,25(7):34-37.
[5] 陈凤.酶催化羟乙基淀粉的接枝改性[D].无锡:江南大学,2009.
[6] 吕生华,马艳芬,刘岗,等.HRP催化聚合对羟基苯磺酸钠的pH控制方法及其应用研究[J].中国皮革,2011,40(5):32-35.
[7] Lv S,Sun T,Zhou Q,et al.Synthesis of starch-g-p(DMDAAC) using HRP initiation and the correlation of its structure and sludge dewaterability[J].Carbohydrate Polymers,2014,103(1):285-293.
[8] 王苏,王强,徐进,等.辣根过氧化物酶催化淀粉接枝丙烯酸甲酯浆料制备及其上浆性能[J].纺织学报,2017,38(6):69-74.
[9] 刘岗,吕生华,马艳芬.HRP催化淀粉与丙烯酰胺接枝共聚物的制备及性能研究[J].中国皮革,2010,39(5):19-23.
[10] Wang S,Xu J,Wang Q,et al.Preparation and rheological properties of starch-g-poly(butyl acrylate) catalyzed by horseradish peroxidase[J].Process Biochemistry,2017,59:104-110.
[11] 刘珍元,姜宏伟.水溶性丙烯酸钠和丙烯酸甲酯共聚物的合成及其分散性能研究[J].应用化工,2009,38(3):349.
[12] Yoo D,Yoo B.Rheology of rice starch-sucrose composites[J].Starch-Stärke,2005,57(6):254-261.
[13] 游文莉,许文耀.杀细菌剂毒力测定方法的研究[J].农药科学与管理,2002,23(2):21-22.
[14] 任静,刘刚,欧全宏,等.淀粉的红外光谱及其二维相关红外光谱的分析鉴定[J].中国农学通报,2015,31(17):58.
[15] Zhang Z,Chen P R,Du X F,et al.Effects of amylose content on property and microstructure of starch-graft-sodium crylate copolymers[J].Carbohydrate Polymers,2014,102(1):453-459.
基金资助
国家自然科学基金(21674043)
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