首页> 外文期刊>Journal of Agricultural and Food Chemistry >Kafirin Protein Based Electrospun Fibers with Tunable Mechanical Property, Wettability, and Release Profile
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Kafirin Protein Based Electrospun Fibers with Tunable Mechanical Property, Wettability, and Release Profile

机译:具有可调节机械性能,润湿性和释放特性的基于Kafirin蛋白的电纺纤维

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Kafirin (KAF), the prolamine protein from sorghum grain, is a promising resource for fabricating renewable and biodegradable materials. However, research efforts in fulfilling its potentials are still lacking. In this work, electrospun kafirin fibers from acetic acid/dichloromethane solutions are reported for the first time. Biodegradable polycaprolactone (PCL) was blended with kafirin to obtain hybrid KAF/PCL fiber mats with desirable physical properties. Hydrogen bonding between the N-H group of kafirin and the C=O group of PCL was detected in each blended formulation. Our small-angle X-ray scattering results indicated that the long spacing decreased and the average spacing between crystalline lamellae of PCL increased with the increase of kafirin content. Compared to the hydrophobic surface of neat PCL fiber mat, KAF/PCL fiber mats under most of the blend ratios showed hydrophilic surface character, and the swelling property was composition-dependent. The fiber mats evolved from brittle ones to flexible ones with the increase of relative content of PCL. The most desirable mechanical performance was obtained at a kafirin/PCL mass blend ratio of 1:2. To simulate the nutraceutical release in body fluid, carnosic acid (CA) was selected as a nutraceutical model, and release behaviors in selected KAF/PCL fiber mats were found to be diffusion controlled. Whereas the amorphous region of kafirin dominated the release rate, PCL functioned as a hydrophobic skeleton to maintain the 3D scaffold of the fiber matrix. The fabricated KAF/PCL fiber mats open up new applications of underutilized cereal protein in nutraceutical delivery.
机译:Kafirin(KAF)是一种来自高粱谷物的谷醇溶蛋白,是制造可再生和可生物降解材料的有前途的资源。但是,仍然缺乏为发挥其潜能而进行的研究。在这项工作中,首次报道了从乙酸/二氯甲烷溶液中纺出的kafirin纤维。将可生物降解的聚己内酯(PCL)与kafirin混合,以获得具有所需物理性能的混合KAF / PCL纤维毡。在每种混合制剂中检测到了kafirin的N-H组和PCL的C = O组之间的氢键。我们的小角度X射线散射结果表明,随着kafirin含量的增加,PCL的长间距减小,而平均结晶片之间的平均间距增大。与纯净PCL纤维毡的疏水表面相比,大多数混合比下的KAF / PCL纤维毡表现出亲水性表面特性,并且溶胀性取决于组成。随着PCL相对含量的增加,纤维毡从脆性毡演变为柔性毡。在kafirin / PCL质量混合比为1:2时获得了最理想的机械性能。为了模拟营养液在体液中的释放,选择肌酸(CA)作为营养模型,并且发现所选KAF / PCL纤维垫的释放行为受到扩散控制。 kafirin的无定形区域决定了释放速率,而PCL则起着疏水骨架的作用,以维持纤维基质的3D支架。制成的KAF / PCL纤维垫在营养保健品配送方面开辟了利用不足的谷物蛋白的新应用。

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