TY - JOUR
T1 - Dual Functionalities of Few-Layered Boron Nitrides in the Design and Implementation of Ca(OH) 2 Nanomaterials toward an Efficient Wall Painting Fireproofing and Consolidation
AU - Zhu, Jinmeng
AU - Li, Xuanhua
AU - Zhang, Yuanyuan
AU - Wang, Jia
AU - Cao, Yijian
AU - Camaiti, Mara
AU - Wei, Bingqing
N1 - Publisher Copyright:
© 2019 American Chemical Society.
PY - 2019/3/27
Y1 - 2019/3/27
N2 - Preserving ancient wall paintings from damage has become a challenge over the years. Nanosized calcium hydroxide (Ca(OH) 2 ) has been identified as a promising material to preserve wall paintings. However, the synthesis of nanosized Ca(OH) 2 is extremely difficult. Here, we demonstrate a breakthrough in wall painting protection enabled by boron nitride nanosheets (BNNSs) through strategic synthesis Ca(OH) 2 -BNNS nanohybrids using an aqueous method. The BNNS have two significant functionalities in the design and implementation of the Ca(OH) 2 nanomaterials. First, the introduction of BNNS results in the successful synthesis of uniform and nanosized Ca(OH) 2 (∼80 nm) in the nanohybrids, which can be attributed to the supersaturation-induced "etching-stripping" mechanism. More interestingly and importantly, a unique gradient penetration structure is strategically formed when applying Ca(OH) 2 -BNNS hybrids on the wall paintings, i.e., the BNNS-rich layer will be at the surface of wall painting, whereas Ca(OH) 2 nanomaterials prefer to penetrate deep in to the wall paintings. This gradient structure will allow the BNNS-rich layer to protect the wall paintings from fire, which is the first report to date among the protection materials for wall paintings; at the same time, nanosized Ca(OH) 2 shows superior wall painting consolidation strength compared to commercial Ca(OH) 2 material. These results endow new applications of the newly emerging two-dimensional nanomaterials for protecting cultural heritage.
AB - Preserving ancient wall paintings from damage has become a challenge over the years. Nanosized calcium hydroxide (Ca(OH) 2 ) has been identified as a promising material to preserve wall paintings. However, the synthesis of nanosized Ca(OH) 2 is extremely difficult. Here, we demonstrate a breakthrough in wall painting protection enabled by boron nitride nanosheets (BNNSs) through strategic synthesis Ca(OH) 2 -BNNS nanohybrids using an aqueous method. The BNNS have two significant functionalities in the design and implementation of the Ca(OH) 2 nanomaterials. First, the introduction of BNNS results in the successful synthesis of uniform and nanosized Ca(OH) 2 (∼80 nm) in the nanohybrids, which can be attributed to the supersaturation-induced "etching-stripping" mechanism. More interestingly and importantly, a unique gradient penetration structure is strategically formed when applying Ca(OH) 2 -BNNS hybrids on the wall paintings, i.e., the BNNS-rich layer will be at the surface of wall painting, whereas Ca(OH) 2 nanomaterials prefer to penetrate deep in to the wall paintings. This gradient structure will allow the BNNS-rich layer to protect the wall paintings from fire, which is the first report to date among the protection materials for wall paintings; at the same time, nanosized Ca(OH) 2 shows superior wall painting consolidation strength compared to commercial Ca(OH) 2 material. These results endow new applications of the newly emerging two-dimensional nanomaterials for protecting cultural heritage.
KW - Ca(OH)
KW - boron nitride
KW - fire-retardant
KW - hybrid nanomaterials
KW - wall paintings
UR - http://www.scopus.com/inward/record.url?scp=85063152582&partnerID=8YFLogxK
U2 - 10.1021/acsami.9b00826
DO - 10.1021/acsami.9b00826
M3 - 文章
C2 - 30821952
AN - SCOPUS:85063152582
SN - 1944-8244
VL - 11
SP - 11792
EP - 11799
JO - ACS Applied Materials and Interfaces
JF - ACS Applied Materials and Interfaces
IS - 12
ER -