Scholarlink

<p>This study systematically investigates the combined influence of molecular weight, solution concentration, and solvent type on the morphology and wettability of electrospun hyperbranched polystyrene (HyperMacs PS) fibers synthesized via RAFT polymerization. A critical entanglement concentration (C<sub>e</sub> ≈ 7 wt% in THF) and an entanglement molecular weight (M<sub>we</sub> ≈ 1.84 × 10⁵ g/mol) were identified as threshold parameters governing the transition from electrospraying to bead-free fiber formation. Morphological evolution from droplets to uniform submicron fibers resulted in a significant enhancement in water contact angle from 102° to 148°, attributed to fiber surface roughness. Comparative solvent analysis revealed delayed jet solidification in DMF due to its lower volatility, shifting C<sub>e</sub> to higher concentrations. These findings provide mechanistic insight into entanglement-driven electrospinning of hyperbranched polymers and establish design guidelines for engineering hydrophobic fibrous surfaces.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Solution-driven morphological and wettability control in electrospun HyperMacs PS fibers

  • 期刊论文

  • 发表日期：

    2026年4月10日

查看全文
  • Sarmad Ali,
  • Nisar Ali,
  • Rayya Ahmed Al Balushi,
  • Mohammad M. Al-Hinaai

摘要

This study systematically investigates the combined influence of molecular weight, solution concentration, and solvent type on the morphology and wettability of electrospun hyperbranched polystyrene (HyperMacs PS) fibers synthesized via RAFT polymerization. A critical entanglement concentration (Ce ≈ 7 wt% in THF) and an entanglement molecular weight (Mwe ≈ 1.84 × 10⁵ g/mol) were identified as threshold parameters governing the transition from electrospraying to bead-free fiber formation. Morphological evolution from droplets to uniform submicron fibers resulted in a significant enhancement in water contact angle from 102° to 148°, attributed to fiber surface roughness. Comparative solvent analysis revealed delayed jet solidification in DMF due to its lower volatility, shifting Ce to higher concentrations. These findings provide mechanistic insight into entanglement-driven electrospinning of hyperbranched polymers and establish design guidelines for engineering hydrophobic fibrous surfaces.