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A comparative study of ultrasonic degumming of silk sericin using citric acid, sodium carbonate and papain

机译：柠檬酸，碳酸钠和木瓜蛋白超声脱胶超声脱胶的比较研究

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摘要

The utilisation of ultrasonics has been shown to enable efficient and environmentally friendly textile wet processing. This study conducted a comparative investigation of silk degumming by using a conventional heating bath and ultrasonic irradiation at a range of ultrasonic frequencies. Citric acid, sodium carbonate and papain were used as degumming agents. Sericin degumming rate, fibre whiteness, fibre surface morphology, fibre structure characteristics and fibre tensile properties were measured and analysed. Results showed that ultrasonics at a lower frequency produced a greater degumming rate than at a higher frequency. Ultrasonics is a more effective way than the conventional heating bath of improving degumming efficiency, especially at a lowered temperature of 60 degrees C. When sodium carbonate was applied at 90 degrees C, a conventional heating bath was found to be more effective than ultrasonics. Papain was found to be more effective in sericin removal than citric acid and sodium carbonate, with a degumming rate of 22% achieved at 60 degrees C under ultrasonic irradiation at 40 kHz. The use of papain can, however, cause a possible overreaction to silk under certain severe conditions, resulting in a loss of fibre whiteness. Negligible changes in fibre structure characteristics were measured by Fourier Transform-infrared spectroscopy and X-ray diffraction after ultrasonic degumming with papain. Slightly reduced fibre strength and increased fibre extensibility were observed in ultrasonically degummed silk samples compared with un-degummed and conventionally degummed silk samples.
机译：已经证明了超声波的利用能够实现高效和环保的纺织湿法处理。该研究通过在多种超声频率范围内使用常规的加热浴和超声辐射进行了对丝脱胶的比较研究。柠檬酸，碳酸钠和木瓜蛋白酶被用作脱胶剂。测量并分析胺蛋白脱胶率，纤维白度，纤维表面形态，纤维结构特性和纤维拉伸性能。结果表明，较低频率下的超声波产生比较高频率更大的脱胶速率。超声波是一种更有效的方法，而不是提高脱胶效率的常规加热浴，特别是在60℃的降低温度下。当碳酸钠以90℃施加时，发现常规的加热浴比超声波更有效。发现木瓜蛋白酶比柠檬酸和碳酸钠更有效，在40kHz的超声波照射下在60℃下脱胶率为22％。然而，使用木瓜蛋白酶在某些严重条件下可能导致丝绸可能过度反应，导致纤维白度丧失。用猪瘟在超声波脱胶后，通过傅里叶变换 - 红外光谱和X射线衍射测量纤维结构特性的可忽略变化。与未脱胶和常规脱胶的丝绸样品相比，在超声脱胶丝样品中观察到纤维强度略微降低和增加的纤维可延长性。

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  • 来源
    《Coloration Technology》 |2019年第3期|195-201|共7页
  • 作者

    Wang Wuchao; Pan Yi; Gong Kang; Zhou Qi; Zhang Tonghua; Li Qing;

  • 作者单位

    Southwest Univ Coll Text & Garments Chongqing 400715 Peoples R China|Chongqing Engn Res Ctr Biomat Fibres & Modern Tex Chongqing 400715 Peoples R China;

    Southwest Univ Coll Text & Garments Chongqing 400715 Peoples R China|Chongqing Engn Res Ctr Biomat Fibres & Modern Tex Chongqing 400715 Peoples R China;

    Southwest Univ Coll Text & Garments Chongqing 400715 Peoples R China|Chongqing Engn Res Ctr Biomat Fibres & Modern Tex Chongqing 400715 Peoples R China;

    Southwest Univ Coll Text & Garments Chongqing 400715 Peoples R China|Chongqing Engn Res Ctr Biomat Fibres & Modern Tex Chongqing 400715 Peoples R China;

    Southwest Univ Coll Text & Garments Chongqing 400715 Peoples R China|Chongqing Engn Res Ctr Biomat Fibres & Modern Tex Chongqing 400715 Peoples R China;

    Southwest Univ Coll Text & Garments Chongqing 400715 Peoples R China|Chongqing Engn Res Ctr Biomat Fibres & Modern Tex Chongqing 400715 Peoples R China;

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