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首页> 外文期刊>International Journal of Biological Macromolecules: Structure, Function and Interactions >Antimicrobial and swelling behaviors of novel biodegradable corn starch grafted/poly(4-acrylamidobenzoic acid) copolymers
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Antimicrobial and swelling behaviors of novel biodegradable corn starch grafted/poly(4-acrylamidobenzoic acid) copolymers

机译：新型生物降解玉米淀粉接枝/聚（4-丙基酰酰苯甲酸）共聚物的抗微生物和肿胀行为

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摘要

Novel antimicrobial copolymers resulted from free radical copolymerization of gelatinized corn starch in aqueous solution with different amounts of 4-acrylamidobenzoic acid monomer using ammonium persulfate (APS)/sodium bisulfite (NaHSO3) as a redox initiator. The grafting copolymerization was evidenced by FTIR,(HNMR)-H-1, scanning electron microscopy (SEM) and X-ray diffraction. The thermal stability was improved after the grafting reaction as detected from IPDT values calculated from the thermogravimetric analysis. The effect of changing grafting parameters (initiator concentration, monomer concentration, reaction time and temperature) on graft copolymerization were studied by measuring the grafting percentage (%G), grafting efficiency (%GE) and homopolymer percentage (%H). The optimum grafting conditions were determined as follows: Initiator concentration [I] = 3 x 10(-2) mol/L, monomer concentration [M] = 0.25 mol/L, reaction temperature = 65 degrees C and reaction time = 2 h. The prepared copolymers exhibited swelling ability in both water and 0.9% saline solution. The antimicrobial study revealed a high degree of inhibition against different strains of Gram-positive bacteria, Gram-negative bacteria and fungi when compared with neat starch. (C) 2019 Published by Elsevier B.V.
机译：新型抗微生物共聚物由使用铵过硫酸铵（APS）/亚硫酸氢钠（NaHSO 3）作为氧化还原引发剂，从水溶液中糊化玉米淀粉的自由基共聚合产生糊精玉米淀粉。接枝共聚通过FTIR，（HNMR）-H-1，扫描电子显微镜（SEM）和X射线衍射来证明。在从热量分析中计算的IPDT值检测到的接枝反应后，热稳定性得到改善。通过测量接枝百分比（％g），接枝效率（％ge）和均聚物百分比（％h）来研究改变接枝参数（引发剂浓度，单体浓度，反应时间和温度）对接枝共聚的影响。确定最佳接枝条件如下：引发剂浓度[i] = 3×10（ - 2）mol / L，单体浓度[m] = 0.25mol / L，反应温度= 65℃，反应时间= 2小时。制备的共聚物在水和0.9％盐水溶液中表现出溶胀能力。抗微生物研究揭示了与纯淀粉相比的不同革兰氏阳性细菌，革兰氏阴性细菌和真菌的高度抑制。 （c）2019年由elestvier b.v发布。

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