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首页> 外文期刊>Journal of Polymers and the Environment >Investigation of the Aerobic Biodegradability of Several Types of Cyclodextrins in a Laboratory-Controlled Composting Test
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Investigation of the Aerobic Biodegradability of Several Types of Cyclodextrins in a Laboratory-Controlled Composting Test

机译：实验室控制堆肥试验中几种类型环糊精有氧生物降解性的研究

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摘要

The biodegradation of several types of cyclodextrins (CDs) under laboratory-controlled composting conditions was investigated. CDs are used in a broad range of applications in food, pharmaceutical, medical, chemical, and textile industries because of their specific chemical characteristics related to their hydrophobic interior and hydrophilic exterior. The three naturally occurring cyclodextrins α-CD, β-CD, and γ-CD proved to be completely and readily biodegradable. Chemical modification of these basic compounds can have a major impact on the biodegradation rate and final biodegradation percentage. Fully acetylated α-CD and β-CD were found to be nonbiodegradable during 45 days of composting. Reducing the degree of acetylation had a positive effect on the biodegradation. Complete biodegradation was obtained for partially acetylated β-CD with a degree of substitution (DS) of 7. The methylation (DS = 13) of β-CD resulted in an undegradable compound during the 47 days composting, while (2-hydroxy)propyl-β-CD reached a plateau in biodegradation at a percentage of 20%. The incorporation of the antimicrobial agents imazalil and alryl-isothiocyanate into β-CD had no negative impact on biodegradation, which makes these antimicrobial agents/CD complexes suitable for incorporation into biodegradable active packaging.
机译：在实验室控制的堆肥条件下，研究了几种类型的环糊精（CD）的生物降解。由于CD具有与疏水内部和亲水外部相关的特定化学特性，因此CD在食品，制药，医疗，化学和纺织行业中得到了广泛的应用。三种天然存在的环糊精α-CD，β-CD和γ-CD被证明是完全且易于生物降解的。这些碱性化合物的化学修饰可对生物降解速率和最终生物降解百分比产生重大影响。发现堆肥45天期间完全乙酰化的α-CD和β-CD是不可生物降解的。降低乙酰化程度对生物降解具有积极作用。部分取代度（DS）为7的部分乙酰化β-CD获得了完全的生物降解。堆肥47天期间，β-CD的甲基化（DS = 13）导致了不可降解的化合物，而（2-羟基）丙基-β-CD达到20％的生物降解水平。抗菌剂咪唑和异硫氰酸烯丙酯的掺入对生物降解没有负面影响，这使得这些抗菌剂/ CD复合物适合掺入可生物降解的活性包装中。

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