A novel dura mater repairing nanocomposite fiber membrane and a preparation method thereof

Nanocomposite fiber membranes were prepared by mixing decellularized dura mater matrix with nano-hydroxyapatite using electrospinning technology. This method overcomes the shortcomings of dura mater repair materials in terms of mechanical properties and bioactivity, achieving both structural support and neuroprotection, and promoting dura mater tissue regeneration and microenvironment regulation.

CN122399111APending Publication Date: 2026-07-17SICHUAN UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-04-23
Publication Date
2026-07-17

AI Technical Summary

Technical Problem

Existing dura mater repair materials cannot simultaneously meet the dual requirements of structural support and neuroprotection, and suffer from problems such as insufficient mechanical properties, uneven fiber distribution, unstable porosity, and lack of biomimetic design for the microenvironment of the skull-dura mater-brain junction area.

Method used

Electrospinning technology was used to uniformly mix decellularized dura mater matrix with nano-hydroxyapatite. By optimizing the solvent system and spinning parameters, nanocomposite fiber membranes were prepared to ensure uniform distribution of nHA and fiber continuity, thereby improving mechanical strength and bioactivity.

Benefits of technology

The prepared nanocomposite fiber membrane has excellent overall mechanical strength and structural stability, can promote the regeneration of dura mater tissue, construct a bioactive and regulatory neuro-immune microenvironment, and solve the single-function limitations of traditional materials.

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Abstract

本发明提出了一种新型硬脑膜修复用纳米复合纤维膜及制备方法,涉及生物医用材料领域。包括如下步骤:选择新鲜硬脑膜,重复3次冻融循环,然后用Triton X‑100、十二烷基硫酸钠和脱氧核糖核酸酶处理2‑12h,清洗后冷冻、干燥、溶解,得到脱细胞硬脑膜基质溶液;将纳米羟基磷灰石溶解得到悬浮液;将高分子聚合物载体溶解得到透明粘稠液;将脱细胞硬脑膜基质溶液、悬浮液和透明粘稠液比例混合、持续搅拌得到纺丝液;将纺丝液进行静电纺丝,收集所得产物,干燥、灭菌后即可得到。本发明克服了dECM难以成纤的技术难题,实现其在静电纺丝中纤维成型;制得的纳米复合纤维膜具有优异的整体力学强度与结构稳定性,可满足临床缝合与抗脑搏动需求,还能促进硬脑膜组织再生。
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