Natural Silk Film for Magnesium Protection: Hydrophobic/Hydrophilic Interaction and Self‐Healing Effect,Macromolecular Materials and Engineering

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Natural Silk Film for Magnesium Protection: Hydrophobic/Hydrophilic Interaction and Self‐Healing Effect
Macromolecular Materials and Engineering ( IF 4.2 ) Pub Date : 2019-09-18 , DOI: 10.1002/mame.201900412
Sviatlana A. Ulasevich ₁ , Anastasia V. Nenashkina ₁ , Nikolai V. Ryzhkov ₁ , Grigorii Kiselev ₁ , Valeria Nikolaeva ₁ , Aleksandra Kiseleva ₁ , Kseniia Mosina ₁ , Ekaterina V. Skorb ₁ , Elena F. Krivoshapkina ₁

Affiliation

Biodegradable implants are required in order to provide successful treatment of injuries. Temporary magnesium‐based implants with particular properties are needed in cases when it is desirable not only to maintain vital activity, but also to initiate the self‐healing process of damaged bones or tissues as well. Unfortunately, the use of magnesium alloys is limited due to the fast biodegradability of the applied material. The aim of this research is to improve the corrosion resistance of magnesium alloys by sonochemical treatment in silk solution followed by additional layer‐by‐layer deposition of natural silk on the magnesium surface. The sonication process is carried out at a frequency of 20 kHz during 5–10 min, while the duration of the silk layer deposition is 15 min. The corrosion behavior of magnesium substrates modified by natural silk layer‐by‐layer assembly is studied. Magnesium substrates sonochemically treated in silk solution demonstrate three times better corrosion resistance compared to control samples sonochemically treated in water. Additional deposition of a silk layer enhances obtained corrosion resistance by 18 times, resulting in a 54‐fold increase overall.

中文翻译：

天然镁保护膜：疏水/亲水相互作用和自愈作用

需要生物可降解的植入物以提供成功的损伤治疗。如果不仅需要维持生命活动，而且还需要启动受损骨骼或组织的自我修复过程，则需要具有特殊性能的临时镁基植入物。不幸的是，由于所涂覆材料的快速生物降解性，限制了镁合金的使用。这项研究的目的是通过在丝溶液中进行声化学处理，然后在镁表面上进行额外的逐层逐层沉积，以提高镁合金的耐腐蚀性。超声处理在5-10分钟内以20 kHz的频率进行，而丝层沉积的持续时间为15分钟。研究了天然蚕丝逐层组装修饰的镁基体的腐蚀行为。与在水中声化学处理的对照样品相比，在丝绸溶液中声化学处理的镁基材显示出三倍更好的耐腐蚀性。额外的丝层沉积可将获得的耐腐蚀性提高18倍，从而使整体增加54倍。

更新日期：2019-12-05

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