Icing causes many problems in daily life and with equipment stability, and many efforts have been made to remove surface icing. Herein, a novel organic gel-infused porous material is developed to achieve excellent de-icing performance. Porous polydimethylsiloxane (P-PDMS) composites with different pore sizes were prepared by a template method. The two-phase skeletons and/or gel material was obtained by infusing PDMS gel into P-PDMS (GIP-PDMS). The ice adhesion strength of GIP-PDMS under static and dynamic icing conditions was comparatively investigated. The results show that GIP-PDMS displayed excellent anti-icing performance, and the delay freezing time of GIP-PDMS1 was ∼4554 s at −5 °C. The ice adhesion strength of GIP-PDMS was much lower than that of P-PDMS, owing to the distinct modulus between the two-phase skeletons and/or gel. The simulation results indicated that the stress concentration promoted ice fracture and contributed to weak ice adhesion. Molecular dynamics further showed that the state of the molecular chains and the interfacial interaction between ice and PDMS gel at 268 K helped to decrease the shear force.

中文翻译：

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有机凝胶注入多孔表面的可控结构设计，可实现高效的防冰和除冰


结冰在日常生活和设备稳定性方面造成许多问题，人们已经做出了很多努力来去除表面结冰。在此，开发了一种新型有机凝胶注入多孔材料，以实现优异的除冰性能。采用模板法制备了不同孔径的多孔聚二甲基硅氧烷 （P-PDMS） 复合材料。通过将 PDMS 凝胶注入 P-PDMS （GIP-PDMS） 中获得两相骨架和/或凝胶材料。比较研究了 GIP-PDMS 在静态和动态结冰条件下的冰粘附强度。结果表明，GIP-PDMS 表现出优异的防冰性能，GIP-PDMS1 在 −5 °C 时的延迟冻结时间为 ∼4554 s。 GIP-PDMS 的冰粘附强度远低于 P-PDMS，因为两相骨架和/或凝胶之间具有明显的模量。模拟结果表明，应力集中促进了冰的破裂，并导致了较弱的冰粘附。分子动力学进一步表明，分子链的状态以及 268 K 时冰和 PDMS 凝胶之间的界面相互作用有助于降低剪切力。