Sustainable and practical utilization of feather keratin by an innovative physicochemical pretreatment: high density steam flash-explosion
Sustainable and practical utilization of feather keratin by an innovative physicochemical pretreatment: high density steam flash-explosion
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通过创新的物理化学预处理实现羽毛角蛋白的可持续和实用利用：高密度蒸汽闪爆
DOI：
10.1039/c2gc36243k
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发表时间：
2012-11
期刊：
影响因子：
9.8
通讯作者：
Li Wu
中科院分区：
文献类型：
--
作者：
Wei Zhao;Ruijin Yang;Yiqi Zhang;Li Wu
目前，羽毛角蛋白等生物质的利用受到高度重视。为了开发创新的生物聚合物，必须从动物角蛋白材料中提取和溶解角蛋白。然而，目前的工艺大多基于强酸强碱水解、化学裂解等剧烈反应，不环保和/或导致羽毛角蛋白严重降解和破坏。在这项研究中，高密度蒸汽闪爆（HDSF）作为一种创新的生物质预处理方法，首次用于处理羽毛废物。在HDSF处理中，具有强大渗透力的蒸汽首先渗透到羽毛的纤维组织和细胞中，然后在超音速（0.0875秒内）爆炸减压时迅速膨胀并脱离结构。 HDSF 有效地破坏了 β-片层晶体和分子间二硫键的稳定性，而不会对角蛋白蛋白链造成实质性损伤，从而显着提高了羽毛角蛋白在水、盐溶液和弱碱等极性溶剂中的提取和溶解度以及酶促可及性。 HDSF 处理可能是一种可持续且实用的预处理，用于提取羽毛角蛋白以开发生物材料并将羽毛转化为营养动物饲料，而不是目前的化学水解和水热处理。
Currently, great attention is being paid to the utilization of biomass, such as feather keratins. It is imperative to extract and dissolve keratins from animal keratinous materials for exploitation of innovative biopolymers. However, most of the current processes are based on strong acid and alkali hydrolysis, chemical cleavage and other violent reactions, which are not eco-friendly and/or result in severe degradation and destruction of feather keratins. In this study, high density steam flash-explosion (HDSF) as an innovative pretreatment of biomass was firstly employed to treat feather waste. In HDSF treatment, steam with a powerful seepage force first penetrates into fibrous tissues and cells of feathers, and then quickly expands and breaks free of the structure upon an explosive decompression at supersonic speed (within 0.0875 s). HDSF effectively destabilized β-sheet crystals and intermolecular disulfide bonds without causing substantial damage to the keratin protein chain, dramatically increasing the extraction and dissolubility of feather keratins in polar solvents like water, salt solution and weak bases, as well as enzymatic accessibility. HDSF treatment could be a sustainable and practical pretreatment for extraction of feather keratin for exploitation of biomaterials and conversion of feathers to nutrient animal feed instead of the current chemical hydrolysis and hydrothermal treatment.
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影响因子：
2.4
作者：
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通讯作者：
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影响因子：
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通讯作者：
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