Chitosan-based films with incorporated supercritical CO2 hop extract: Structural, physicochemical, and antibacterial properties
Chitosan-based films with incorporated supercritical CO2 hop extract: Structural, physicochemical, and antibacterial properties
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DOI：
10.1016/j.carbpol.2019.05.003
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发表时间：
2019-09-01
影响因子：
11.2
通讯作者：
Likozar, Blaz
中科院分区：
文献类型：
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作者：
Bajic, Marijan;Jalsovec, Helena;Likozar, Blaz
壳聚糖为基础的薄膜与超临界CO2啤酒花提取物（HE）的开发和评价的结构，物理化学和抗菌性能。形态学和光谱分析证实了成功地将HE掺入到聚合物基质中，这影响了膜的结构和视觉外观。HE的存在导致膜的亲水性降低，但也提供了在低于350 nm的波长处的完全UV光阻挡。此外，拉伸强度（从14.4 MPa到6.4 MPa）和杨氏模量（从218.8 MPa到26.9 MPa）的下降趋势，以及断裂伸长率（从10.7%到35.1%）的上升趋势，已观察到浸提物掺入后。薄膜中的总酚含量高达13 mg（GAE）g（薄膜）（-1）。此外，载HE膜对食源性致病菌枯草芽孢杆菌具有抗菌活性。
Chitosan-based films with incorporated supercritical CO2 hop extract (HE) were developed and evaluated regarding structural, physicochemical, and antibacterial properties. The morphological and spectroscopic analyses have confirmed successful incorporation of HE into the polymer matrix, which affected films' structure and visual appearance. The presence of HE has caused a reduction in the hydrophilic character of films, but also provided a complete UV light blockage at wavelengths below 350 nm. Furthermore, a declining trend of tensile strength (from 14.4 MPa to 6.4 MPa) and Young's modulus (from 218.8 MPa to 26.9 MPa), as well as an ascending trend of elongation at break (from 10.7% to 35.1%), have been observed after the extract incorporation. The total phenolic content in the films was up to similar to 13 mg(GAE) g(film)(-1). Besides, the HE-loaded films exhibited antibacterial activity against foodborne pathogen Bacillus subtilis.