concern over the global plastic pollution. [1][2][3][4][5][6][7] These supramolecular materials are considered to effectively extend service life and improve recycling rate through readily repairing and reprocessing, which will make significant contribution to realize a sustainable society. [8][9][10][11] Different from the traditional plastics based on extremely stable covalent bonds and crosslinks, supramolecular plastic materials incorporate weak intermolecular interactions such as ionic interactions, [12][13][14] hydrogen bonds [5][6][7][8][15][16][17][18] and coordination interactions, [19][20][21][22] which have been wellestablished to achieve self-healing and reprocessing due to the reversible and dynamic nature of weak supramolecular forces. [23] It should be noted that these weak interactions are generally polar and vulnerable to water. [24][25][26][27] In many cases, the essence of efficient self-healing and reprocessing for supramolecular polymeric materials are ascribed to the readily water absorption and water-induced plasticization, which results in strongly self-adhering. [28][29][30][31][32] However, the waterassisted self-adhering process occurs nonspecifically at the damage sites. Undesired self-adhesion generally occurs beyond the damaged sites when the ambient humidity gets high or the materials are exposed to water, which makes the storage and use demand harsh dry condition. Thus, to eliminate undesired self-adhesion, Supramolecular materials with room-temperature healability and recyclability are highly desired because they can extend materials lifetimes and reduce resources consumption. Most approaches toward healing and recycling rely on the dynamically reversible supramolecular interactions, such as hydrogen, ionic and coordinate bonds, which are hygroscopic and vulnerable to water. The general water-induced plasticization facilitates the healing and reprocessing process but cause a troubling problem of random self-adhesion. To address this issue, here it is reported that by modifying the hygroscopic surfaces with hydrophobic alkyl chains of dodecyltrimethoxysilane (DTMS), supramolecular plastic films based on commercial raw materials of sodium alginate (SA) and cetyltrimethylammonium bromide (CTAB) display extraordinary damagespecific healability. Owing to the hydrophobic surfaces, random self-adhesion is eliminated even under humid environment. When damage occurs, the fresh surfaces with ionic groups and hydroxyl groups expose exclusively at the damaged site. Thus, damage-specific healing can be readily facilitated by waterinduced plasticization. Moreover, the films display excellent room-temperature recyclability. After multiple times of reprocessing and re-modifying with DTMS, the rejuvenated films exhibit fatigueless mechanical properties. It is anticipated that this approach to damage-specific healing and room-temperature recycling based on surface hydrophobization can be applied to design various of supramolecular plastic polysaccharides materials for building sustainable societies.

The experimental phenomena that amorphous inosine (IR), α-IR, and IR dihydrate can form from IR aqueous solution and β-IR can crystallize from IR 70 vol% DMSO aqueous solution were explained using mid-frequency Raman difference spectra analysis.

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