中国组织工程研究 ›› 2026, Vol. 30 ›› Issue (30): 7910-7917.doi: 10.12307/2026.419

• 神经组织构建 nerve tissue construction • 上一篇    下一篇

铜-聚多巴胺/聚乙烯亚胺涂层改善聚醚醚酮的体外抗菌性能

徐朕钰1,胡金涵2,刘  哲2,何晓勇2,刘  娟2,杨明兴2,安翔鸿2,尚婉琼2,徐国强2,3   

  1. 1廊坊首都医科大学附属北京潞河医院香河医康医院口腔科,河北省廊坊市   065400;2新疆医科大学第一附属医院(附属口腔医院)口腔修复种植科,新疆维吾尔自治区乌鲁木齐市   830054;3新疆维吾尔自治区口腔医学研究所,新疆维吾尔自治区乌鲁木齐市   830054
  • 收稿日期:2025-09-26 修回日期:2026-01-05 出版日期:2026-10-28 发布日期:2026-09-12
  • 通讯作者: 徐国强,硕士,副教授,主任医师,新疆医科大学第一附属医院(附属口腔医院)口腔修复种植科,新疆维吾尔自治区乌鲁木齐市 830054;新疆维吾尔自治区口腔医学研究所,新疆维吾尔自治区乌鲁木齐市 830054
  • 作者简介:徐朕钰,女,1998年生,天津市人,汉族,硕士,主要从事聚醚醚酮表面改性等方向的研究。
  • 基金资助:
    新疆自治区科技支疆项目计划(2024E02053),项目负责人:徐国强

Copper-polydopamine/polyethyleneimine coating improves in vitro antimicrobial properties of polyetheretherketone

Xu Zhenyu1, Hu Jinhan2, Liu Zhe2, He Xiaoyong2, Liu Juan2, Yang Mingxing2, An Xianghong2, Shang Wanqiong2, Xu Guoqiang2, 3   

  1. 1Department of Stomatology, Xianghe Yikang Hospital (Beijing Luhe Hospital Affiliated to Capital Medical University), Langfang 065400, Hebei Province, China; 2Department of Prosthodontics and Dental Implantology, First Affiliated Hospital of Xinjiang Medical University (Affiliated Stomatological Hospital), Urumqi 830054, Xinjiang Uyghur Autonomous Region, China; 3Xinjiang Uygur Autonomous Region Institute of Stomatology, Urumqi 830054, Xinjiang Uyghur Autonomous Region, China
  • Received:2025-09-26 Revised:2026-01-05 Online:2026-10-28 Published:2026-09-12
  • Contact: Xu Guoqiang, MS, Associate professor, Chief physician, Department of Prosthodontics and Dental Implantology, First Affiliated Hospital of Xinjiang Medical University (Affiliated Stomatological Hospital), Urumqi 830054, Xinjiang Uyghur Autonomous Region, China; Xinjiang Uygur Autonomous Region Institute of Stomatology, Urumqi 830054, Xinjiang Uyghur Autonomous Region, China
  • About author:Xu Zhenyu, MS, Department of Stomatology, Xianghe Yikang Hospital (Beijing Luhe Hospital Affiliated to Capital Medical University), Langfang 065400, Hebei Province, China
  • Supported by:
    Science and Technology Support Project of Xinjiang Uygur Autonomous Region, No. 2024E02053 (to XGQ)

摘要:


文题释义:
聚醚醚酮:一种新型高性能工程塑料,主链结构为1个酮键、2个醚键、3个芳香环构成的重复单元,具有良好的机械性能和化学稳定性,在骨植入物及口腔医学领域具有广阔的应用前景。
聚多巴胺/聚乙烯亚胺共沉积涂层:受贻贝启发的聚多巴胺涂层沉积过程中会出现大颗粒聚集体,聚乙烯亚胺在与聚多巴胺沉积过程中与其发生迈克尔加成和席夫碱反应,使沉积的涂层更加均匀、亲水性更佳,引入的铜可以与聚乙烯亚胺进行协同抗菌,赋予涂层良好的抗菌性能。

背景:聚醚醚酮具有优异的机械性能,有望替代钛及钛合金种植体,但口内菌群环境复杂,聚醚醚酮的抗菌活性较差,容易引发种植体周围炎,导致植入失败。
目的:在聚醚醚酮表面构建具有良好生物相容性的抗菌涂层,提高聚醚醚酮的抗菌活性。
方法:①制备磺化聚醚醚酮,将磺化聚醚醚酮分别浸泡在聚多巴胺溶液中24 h、聚多巴胺/聚乙烯亚胺溶液中20 h与含5,10,15 mmol/L CuSO4·5H2O的聚多巴胺/聚乙烯亚胺溶液中18 h,制备涂层,对应的样品分别记为PDA-SPEEK、PDA/PEI600-SPEEK、Cu(5)-PDA/PEI600-SPEEK、Cu(10)-PDA/PEI600-SPEEK、Cu(15)-PDA/PEI600-SPEEK。通过扫描电镜、傅里叶红外光谱仪、X射线能量色散谱、接触角测量仪,分析改性前后聚醚醚酮的表面形貌、表面官能团、元素构成及亲水性改变。②将金黄色葡萄球菌(或牙龈卟啉单胞菌)分别与未改性聚醚醚酮及上述5种改性聚醚醚酮样品共培养,通过菌落计数实验及细菌黏附实验检测涂层的体外抗菌性能。③将小鼠胚胎成骨细胞前体细胞MC3T3-E1分别与未改性聚醚醚酮及5种改性聚醚醚酮样品的浸提液共培养,采用CCK-8法检测涂层的细胞相容性。
结果与结论:①扫描电镜显示,与PDA-SPEEK、PDA/PEI600-SPEEK组相比,Cu(5)-PDA/PEI600-SPEEK、Cu(10)-PDA/PEI600-SPEEK、Cu(15)-PDA/PEI600-SPEEK组涂层更加均匀致密。X射线能量色散谱、傅里叶红外光谱结果显示,改性前后聚醚醚酮表面的元素及官能团改变,表明涂层成功制备。改性后聚醚醚酮表面的亲水性高于未改性聚醚醚酮,并且随着涂层中铜浓度的增加,改性聚醚醚酮表面的亲水性提高。②菌落计数实验及细菌黏附实验显示,未改性聚醚醚酮不具备抗菌性能,PDA/PEI600-SPEEK的抗菌能力强于PDA-SPEEK,Cu(5)-PDA/PEI600-SPEEK、Cu(10)-PDA/PEI600-SPEEK、Cu(15)-PDA/PEI600-SPEEK的抗菌能强于PDA/PEI600-SPEEK。③CCK-8实验显示,5种改性聚醚醚酮样品具有良好的细胞相容性。结果表明,含铜聚多巴胺/聚乙烯亚胺共沉积涂层赋予了聚醚醚酮良好的抗菌性能。
https://orcid.org/0009-0007-7325-0288(徐朕钰) 


中国组织工程研究杂志出版内容重点:干细胞;骨髓干细胞;造血干细胞;脂肪干细胞;肿瘤干细胞;胚胎干细胞;脐带脐血干细胞;干细胞诱导;干细胞分化;组织工程

关键词: 聚醚醚酮, 聚多巴胺, 聚乙烯亚胺, 表面改性, 抗菌活性, 涂层

Abstract: BACKGROUND: Polyetheretherketone (PEEK) has excellent mechanical properties and is expected to replace titanium and titanium alloy implants. However, the complex environment of intraoral flora and the poor antimicrobial activity of PEEK can easily cause peri-implantitis and implant failure.
OBJECTIVE: To construct a biocompatible antimicobial coatings on PEEK surfaces to improve the antimicrobial activity of PEEK. 
METHODS: (1) Sulfonated PEEK was prepared and immersed in polydopamine solution for 24 hours, polydopamine/polyethyleneimine solution for 20 hours, and polydopamine/polyethyleneimine solutions containing 5, 10, and 15 mmol/L CuSO4·5H2O for 18 hours to prepare coatings. The corresponding samples were labeled as PDA-SPEEK, PDA/PEI600-SPEEK, Cu(5)-PDA/PEI600-SPEEK, Cu(10)-PDA/PEI600-SPEEK, and Cu(15)-PDA/PEI600-SPEEK, respectively. Scanning electron microscopy, Fourier transform infrared spectroscopy, X-ray energy dispersive spectroscopy, and contact angle measurements were used to analyze the surface morphology, surface functional groups, elemental composition, and hydrophilicity changes of PEEK before and after modification. (2) Staphylococcus aureus (or Porphyromonas gingivalis) was co-cultured with unmodified PEEK and the five modified PEEK samples. The in vitro antibacterial performance of the coatings was detected by colony counting and bacterial adhesion experiments. (3) Mouse embryonic osteoblast precursor cells MC3T3-E1 were co-cultured with the extracts of unmodified PEEK and the five modified PEEK samples. The cytocompatibility of the coatings was detected using the CCK-8 assay.
RESULTS AND CONCLUSION: (1) Scanning electron microscopy showed that the coatings of the Cu(5)-PDA/PEI600-SPEEK, Cu(10)-PDA/PEI600-SPEEK, and Cu(15)-PDA/PEI600-SPEEK groups were more uniform and dense compared to the PDA-SPEEK and PDA/PEI600-SPEEK groups. X-ray energy dispersive spectroscopy and Fourier transform infrared spectroscopy results showed changes in the elements and functional groups on the PEEK surface before and after modification, indicating the successful preparation of the coating. The hydrophilicity of the modified PEEK surface was higher than that of the unmodified PEEK, and the hydrophilicity of the modified PEEK surface increased with increasing copper concentration in the coating. (2) Colony counting and bacterial adhesion experiments showed that unmodified PEEK did not possess antibacterial properties, PDA/PEI600-SPEEK had stronger antibacterial activity than PDA-SPEEK, and Cu(5)-PDA/PEI600-SPEEK, Cu(10)-PDA/PEI600-SPEEK, and Cu(15)-PDA/PEI600-SPEEK had stronger antibacterial activity than PDA/PEI600-SPEEK. (3) CCK-8 assay showed that all five modified PEEK samples had good cytocompatibility. The results indicate that the copper-containing polydopamine/polyethyleneimine co-deposited coating endowed PEEK with excellent antibacterial properties.


Key words: polyetheretherketone, polydopamine, polyethyleneimine, surface modification, antimicrobial activity, coating

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