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在恒定和循环温度下,纤维素纳米晶体的冰再结晶抑制效应

Min Li¹, Matthew Winston Reeder¹, Tao Wu¹

¹Department of Food Science, The University of Tennessee, 2510 River Drive, Knoxville, TN 37996, USA.

International journal of biological macromolecules

|May 31, 2023

概括

纤维素纳米晶体 (CNCs) 显示出不同的冰再结晶抑制 (IRI) 效应,取决于温度和度. 它们的有效性受到表面覆盖率和扩散率等因素的影响,特别是在循环温度下.

科学领域:

材料科学材料科学材料科学
生物物理学的生物物理.
物理化学物理化学

背景情况:

冰的再结晶是影响冷材料稳定的关键过程.
了解冰再结晶抑制 (IRI) 对食品科学,冷保存和材料工程的应用至关重要.
纤维素纳米晶体 (CNCs) 由于其独特的特性,被探索为潜在的IRI剂.

研究的目的:

在各种恒定和循环温度条件下,研究纤维素纳米晶体 (CNC) 的冰再结晶抑制 (IRI) 效应.
为了确定CNC度和温度如何影响IRI疗效.
阐明CNC属性与其IRI性能之间的关系.

主要方法:

使用含有3.0%糖糖溶液的喷射试验来评估常温 (-10°C至-2°C) 的IRI.
在不同的温度条件下使用了含有25.0%和35.0%的糖溶液的三明治试验来评估IRI.
在不同存储时间 (≤2小时,2天,10天) 的循环温度下检查的CNC活动.

主要成果:

0.2%的CNC的IRI效应随着温度的升高 (-10°C至-2°C) 降低.
更高的CNC度 (0.5%,1.0%) 显示稳定的IRI从-10°C到-4°C,但在-2°C下降.
三明治测试表明,在较高的温度下,IRI增加,但在特定的低温和度下除外.
在循环温度下,CNC在短时间内 (≤2h) 处于不活跃状态,但在较长时间内 (2和10天) 处于活跃状态.

结论:

CNC的IRI效率取决于温度,并受到其度的影响.
诸如CNC表面覆盖面,扩散率和冰类型等因素可能会调节IRI性能.
CNC 显示出作为 IRI 剂的潜力,其有效性因热条件和暴露时间而有很大变化.

关键词:

恒定温度恒定的温度是恒定的温度.循环温度循环温度的时间抑制冰的再结晶,抑制了冰的再结晶.

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