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���ڣ�������ͨ��W����/�ː���n�}�Mᘌ������}���|(zh��)��ɰ�r��ʯ�������L�������������������γəC����ɰ�r��(n��i)���z�Y�|(zh��)��ʧ���Ȇ��}��������������Ûˮ���z��ɰ�r��������ԭλ�γ��ԏ��a��ʧ���z�Y�|(zh��)������ͨ�^�M�ֺ͗l�������{(di��o)����������ˮ���z��ԭλ�γɕr�g������Û�ԣ��M��ͨ�^�ɹ�ʾۙ���g�о�����������ˮ���z������ɰ�r��(n��i)���ķֲ����������u��������ɰ�r�е��LЧ���oЧ������K�о�������⑪����ԓ�ɹ����ڿ���ACS Applied Materials & Interfaces���ϰl(f��)�����}����Insight into a Bentonite-based Hydrogel for the Conservation of Sandstone-based Cultural Heritage: In-situ Formation, Reinforcement Mechanism, and High-Durability Evaluation�������£�DOI: https://doi.org/10.1021/acsami.2c13122����
Figure 1. (a) Chemical structure scheme of B-H hydrogel. (b) Schematic illustration of the bentonite-based hydrogel (B-H) formed in-situ in sandstone.
Figure 2. Sandstones (a) after protecting with B-H and (b) traditional hydrogel.
Figure 3. (a) Chemical structure and optical images of the Carbon quantum dots (CQDs) used for fluorescent tracer. Photographs of the appearance (b), cross-sectional surface (b1 and b3) of the sandstones treated by hydrogel-CQDs. Photograph of the appearance (b2) of the fresh sandstones. (c) Morphology and element distribution of Si, C and N elements in the internal grains of the treated sandstone by SEM-mapping. (d) Morphology of the internal grains of the treated sandstone by SEM. (e) Schematic diagram of in-situ formation of hydrogel inside the sandstone.
Figure 4. (a) Acid resistance, (b) salt crystallization cycles in moisture and heat, and (c) freeze-thaw cycles of unprotected and B-H-sandstone. (d) Schematization of the protecting mechanism for freeze-thaw resistance and salt resistance for B-H- sandstone.
Figure 5. Application of bentonite-based hydrogel on actual sandstone-based cultural heritage at Dafo Si. Sampling areas are indicated with red rectangles. Photographs of the sandstones before (a) and after (b) protecting by bentonite-based hydrogel.
ȫ��朽ӣ�https://pubs.acs.org/doi/full/10.1021/acsami.2c13122
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