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微型和纳米塑料从单个可吸收 suture 释放到模拟的体液中

Yunhong Shi¹, Dunzhu Li², Christopher Hill³

¹Department of Civil, Structural and Environmental Engineering, Trinity College Dublin, Dublin 2, Dublin D02PN40, Ireland; TrinityHaus, Trinity College Dublin, Dublin 2, Dublin D02PN40, Ireland.

Journal of hazardous materials

|February 1, 2024

概括

可吸收的多糖醇酸 sutures释放数百万的微塑料和纳米塑料,而非可吸收的 sutures没有. 与其他聚合物混合PGA显著减少颗粒的释放,突出了对健康风险评估的需要.

科学领域:

生物材料科学生物材料科学
聚合物化学聚合物化学
环境健康环境健康

背景情况:

合成聚合物对于医疗器械和植入物至关重要,提供生物相容性和机械强度.
关于从这些医疗级聚合物中释放的微塑料 (MP) 和纳米塑料 (NP) 颗粒存在重大知识差距.
基于多聚甘酸 (PGA) 的接通常使用,但它们对颗粒脱落的潜力需要调查.

研究的目的:

量化从可吸收 (PGA) 和不可吸收 (聚烯,聚胺) 上释放的微塑料和纳米塑料颗粒.
为了比较不同类型的PGA和非可吸收之间的颗粒释放水平.
评估PGA与L-乳或epsilon-caprolactone共同混合对颗粒释放的影响.

主要方法:

在实验室测试3个PGA (PGA100,PGA90,PGA75) 和2个不可吸收的 (PP,PA) 在模拟的体液中8周.
量化微塑料 (>1μm) 和纳米塑料 (200-1000nm) 颗粒的每厘米的部释放量.
从与L-乳或epsilon-caprolactone共同混合的PGA sutures中释放的颗粒的分析.

主要成果:

吸收性PGA与非吸收性PP和PA相比,MP和NP释放水平显著更高.
排名中的释放级别:PGA 100 >> PGA 90 > PGA 75 >> PP ≈ PA.
一个PGA 100 suture释放了大约0.63万个MP和1.96万个NP每厘米.
同时混合PGA与10-25%的L-乳或epsilon-caprolactone将MP释放减少了两个数量级.
在测试条件下,从不可吸收的部中没有检测到MP.

结论:

可吸收的PGA是模拟体液中微塑料和纳米塑料颗粒释放的重要来源.
PGA的组成显著影响颗粒的散射,与共同混合减少释放.
进一步的研究对于评估医疗聚合物中纳米和微塑料的体内释放和潜在的健康风险至关重要.

关键词:

降解降解是一种降解.在体外试验研究研究.微塑料是一种微塑料.纳米大小的微塑料微塑料.模拟的体液体液体模拟接接接接

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