水溶性ランダム型およびブロック型リン脂質ポリマーから自発的に形成されるハイドロゲルの特性評価
Water-soluble MPC-based phospholipid polymers form hydrogels spontaneously at room temperature through hydrogen bonding between carboxyl groups, without chemical crosslinking. To examine how carboxyl group density and monomer sequence affect gelation, random-type (rPMT) and ABA-block-type (bPMA) MPC copolymers bearing carboxylic acids were synthesized and paired with hydrophobic counterpart polymers. Raman spectroscopy and rheological measurements revealed that TZgel formation relied on inter- and intramolecular hydrogen bonding within rPMT, while bPMA chains underwent aggregation and network restructuring in aqueous media, requiring longer gelation times. Compression strength comparisons showed no significant difference between ABgel and bABgel, whereas TZgel exhibited lower strength, attributed to steric hindrance from bulky side chains preventing planar hydrogen-bond alignment. These findings indicate that both chemical structure and monomer sequence govern the mechanical and gelation properties of MPC polymer hydrogels.
Hydrogel network formation is driven by inter- and intramolecular hydrogen bonding between carboxyl groups on MPC copolymers; both the chemical structure and the monomer unit sequence determine gelation kinetics and mechanical strength.
This is basic research at the cellular or molecular level. For human application, inhalation is the most promising delivery route, but inhalation carries explosion risk and concentration matters (empirical LFL of 10%; high-concentration devices are not recommended).
See also:
https://h2-papers.org/en/papers/15978662