Liu Ben, Wang Shixiao, Guo Hanling, Yin Huibo, Song Yuqiu, Gong Min, Zhang Liang, Lin Xiang, Wang Dongrui
State Key Laboratory of Shale Oil and Gas Enrichment Mechanisms and Effective Development, No. 197 Baisha Road, Shahe Town, Beijing 102206, China.
Research and Development Center of Measurement and Control Technology and Equipment, SINOPEC Research Institute of Petroleum Engineering Co., Ltd., No. 197 Baisha Road, Shahe Town, Beijing 102206, China.
Polymers (Basel). 2025 Jan 2;17(1):100. doi: 10.3390/polym17010100.
Poly(glycolic acid) (PGA) is a rapidly degradable polymer mainly used in medical applications, attributed to its relatively high cost. Reducing its price will boost its utilization in a wider range of application fields, such as gas barriers and shale gas extraction. This article presents a strategy that utilizes recycled PGA as a raw material alongside typical carbon nanomaterials, such as graphene oxide nanosheets (GO) and carbon nanotubes (CNTs), to produce low-cost, fully degradable yarns via electrospinning and twisting techniques. The results demonstrate that the tensile strength of the PGA/GO composite yarn increased to 21.36 MPa, and the elastic modulus attained a value of 259.51 MPa with a 3 wt% of GO loading. The addition of an appropriate amount of GO enhances the tensile resistance of the composite yarns to a certain extent. However, excessive application of GO and CNTs can lead to surface defects in the nanofibers, reducing their mechanical properties. Moreover, the integration of both materials could inhibit the degradation process of PGA to some extent, thereby partially addressing the issue of excessive degradation rates associated with the relatively low molecular weight of recycled PGA.
聚乙醇酸（PGA）是一种主要用于医疗应用的可快速降解的聚合物，但其成本相对较高。降低其价格将促进其在更广泛的应用领域中的使用，如气体阻隔和页岩气开采。本文提出了一种策略，即利用回收的PGA作为原料，与典型的碳纳米材料，如氧化石墨烯纳米片（GO）和碳纳米管（CNT）一起，通过静电纺丝和加捻技术生产低成本、完全可降解的纱线。结果表明，在GO负载量为3 wt%时，PGA/GO复合纱线的拉伸强度提高到21.36 MPa，弹性模量达到259.51 MPa。适量添加GO在一定程度上提高了复合纱线的拉伸抗性。然而，过量使用GO和CNT会导致纳米纤维表面出现缺陷，降低其机械性能。此外，两种材料的结合在一定程度上可以抑制PGA的降解过程，从而部分解决了与回收PGA相对较低分子量相关的降解速率过快的问题。
