Most of the post-quake cultural heritage rescue and protection projects in Sichuan have been completed The State Administration of Cultural Heritage recently rewarded 132 individuals and organizations for their work i...Most of the post-quake cultural heritage rescue and protection projects in Sichuan have been completed The State Administration of Cultural Heritage recently rewarded 132 individuals and organizations for their work in rescuing and protecting cultural relics damaged by the Wenchuan earthquake on May12,2008.展开更多
The development of adhesive technology is gaining increasing attention in machinery,electronics,aviation,and other fields.However,traditional adhesives are difficult to be peeled and removed after cross-linking and cu...The development of adhesive technology is gaining increasing attention in machinery,electronics,aviation,and other fields.However,traditional adhesives are difficult to be peeled and removed after cross-linking and curing due to the limited solubility in common solvents,which causes pollution and damage to the surface of the adherend.In this work,we synthesized random hyperbranched polyamide-amine hot melt adhesives through Michael addition of 1,8-octanediamine and N,N’-methylene diacrylamide(ODA-RHP HMA).Owing to the presence of various polar groups,ODA-RHP HMA exhibited robust lap shear strength to different substrates,including glass(6.6 MPa),ceramics(10.3 MPa),steel(11.5 MPa),and aluminum(11.8 MPa).Due to the hydrogen bonds in ODA-RHP,the HMA demonstrated intrinsic self-healing ability,which can be used repeatedly when being subjected to cyclic heating and cooling.Since ODA-RHP HMA can be swollen or dissolved in ethanol,the adhesives can be easily removed through erasing.In addition,ODA-RHP exhibited aggregation-induced luminescence due to the tertiary amine structure in the molecular structure of ODA-RHP,which can be used in the field of cultural relics restoration.展开更多
文摘Most of the post-quake cultural heritage rescue and protection projects in Sichuan have been completed The State Administration of Cultural Heritage recently rewarded 132 individuals and organizations for their work in rescuing and protecting cultural relics damaged by the Wenchuan earthquake on May12,2008.
基金supported by the National Natural Science Foundation of China(Nos.51873170 and 11732012)the National Key R&D Program of China(No.2019YFA0706801)+1 种基金the Key Laboratory Construction Program of Xi'an Science and Technology Bureau(No.201805056ZD7CG40)the One Hundred Talents Program of Shaanxi Province and Shaanxi International Science and Technology Cooperation Program Project(No.2020KW-062)。
文摘The development of adhesive technology is gaining increasing attention in machinery,electronics,aviation,and other fields.However,traditional adhesives are difficult to be peeled and removed after cross-linking and curing due to the limited solubility in common solvents,which causes pollution and damage to the surface of the adherend.In this work,we synthesized random hyperbranched polyamide-amine hot melt adhesives through Michael addition of 1,8-octanediamine and N,N’-methylene diacrylamide(ODA-RHP HMA).Owing to the presence of various polar groups,ODA-RHP HMA exhibited robust lap shear strength to different substrates,including glass(6.6 MPa),ceramics(10.3 MPa),steel(11.5 MPa),and aluminum(11.8 MPa).Due to the hydrogen bonds in ODA-RHP,the HMA demonstrated intrinsic self-healing ability,which can be used repeatedly when being subjected to cyclic heating and cooling.Since ODA-RHP HMA can be swollen or dissolved in ethanol,the adhesives can be easily removed through erasing.In addition,ODA-RHP exhibited aggregation-induced luminescence due to the tertiary amine structure in the molecular structure of ODA-RHP,which can be used in the field of cultural relics restoration.
