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underwater glue based on photo- and thermo A reversible underwater glue based on photo- and thermo

L.-P. Xu, J. Peng, Y. Liu, Y. Wen, X. Zhang, L. Jiang and S. Wang, ACS Nano, 2013, 7, 5077–5083 CrossRef CAS PubMed . L. Xie, L. Gong, J. Zhang, L. Han, L. Xiang, J. Chen, J. Liu, B. Yan and H. Zeng, J. Mater. Chem. A, 2019, 7, 21944–21952 RSC . L. Ma, J. Wang, J. He, Y. Yao, X. Zhu, L. Peng, J. Yang, X. Liu and M. Qu, J. Mater. Chem. A, 2021, 9, 26949–26962 RSC . R. J. Stewart, T. C. Ransom and V. Hlady, J. Polym. Sci. Pol. Phys., 2011, 49, 757–771 CrossRef CAS PubMed . Fig. 2 Underwater adhesion performance of the anth-PEI glues. (a) Three kinds of anth-PEI glues with different anthracenyl regioisomers. (b) Underwater adhesion strength of anth-PEI glues influenced by anthracenyl regioisomers (1.5% molar ratio of anthracenyl to amino groups and 10 kPa preload). (c) Changes in underwater adhesion strength as a function of irradiation time (10 kPa preload). (d) Underwater adhesion strength with respect to molar ratios of 9-anthracenyl to amino groups (2 min irradiation time and 10 kPa preload). (e) Widely tunable underwater adhesion strength of 9-anth-PEI glue with different preloads and irradiation times. (f) Underwater adhesion strength as a function of thermolysis temperatures (15 min thermolysis time). (g) Reversible underwater adhesion of 9-anth-PEI glue upon alternating irradiation and heating. (h) The utility of 9-anth-PEI glue to control underwater adhesion strength (2 min irradiation time and 10 kPa preload).Our underwater glues are very versatile and easy to use at ground level water intakes, skimmers, lighting, overflow-channels, to stone transition areas, for re-attaching of tiles, re-grouting... Z. Xu, C. Fan, Q. Zhang, Y. Liu, C. Cui, B. Liu, T. Wu, X. Zhang and W. Liu, Adv. Funct. Mater., 2021, 31, 2100462 CrossRef CAS . C. Wei, X. Zhu, H. Peng, J. Chen, F. Zhang and Q. Zhao, ACS Sustainable Chem. Eng., 2019, 7, 4508–4514 CrossRef CAS . M. Shin, K. Kim, W. Shim, J. W. Yang and H. Lee, ACS Biomater. Sci. Eng., 2016, 2, 687–696 CrossRef CAS . H. Lee, D.-S. Um, Y. Lee, S. Lim, H.-J. Kim and H. Ko, Adv. Mater., 2016, 28, 7457–7465 CrossRef CAS .

Underwater Repair Adhesives - Aquabond

J. Zhou, Y. Wan, N. Liu, H. Yin, B. Li, D. Sun and Q. Ran, J. Appl. Polym. Sci., 2018, 135, 45688 CrossRef . Y. Liu, M. Xia, L. Wu, S. Pan, Y. Zhang, B. He and P. He, Ind. Eng. Chem. Res., 2019, 58, 21649–21658 CrossRef CAS . Y.-C. Chuanga, H.-K. Changa, G.-L. Liu and P.-Y. Chen, J. Mech. Behav. Biomed. Mater., 2017, 73, 76–85 CrossRef PubMed .Using a caulking gun or a suitable application method, apply the sealant directly onto the surface that needs to be sealed. Apply a continuous and even bead of sealant along the area.

reversible underwater glue based on photo- and thermo A reversible underwater glue based on photo- and thermo

Adiseal Ultra clear sealant & adhesive stands out as a truly transparent option. Unlike other sealants that claim to be clear but result in a cloudy or tinted appearance upon application, Adiseal lives up to its Ultra Clear name. Cheaper silicone clear sealants often exhibit a cloudy, almost white colour instead of providing the desired clarity. S. Seo, D. W. Lee, J. S. Ahn, K. Cunha, E. Filippidi, S. W. Ju, E. Shin, B. S. Kim, Z. A. Levine, R. D. Lins, J. N. Israelachvili, J. H. Waite, M. T. Valentine, J. E. Shea and B. K. Ahn, Adv. Mater., 2017, 29, 1703026 CrossRef PubMed .Most of the pollution in the ocean comes from human activities, including oil spills, garbage dumping, and domestic and industrial wastewater discharges. 169–171 The oceans have a considerable impact on the global climate and ecosystem. Although the ocean has a strong self-healing ecosystem, it takes a long time to recover. Therefore, a comprehensive monitoring of the state of the marine environment, especially how human activities affect marine ecosystems, is essential. Recently, a highly resilient, durable, ultra-sensitive ionic gel skin sensor (MIS sensor) based on micro–nanostructures capable of monitoring water wave vibrations was reported. 162 With the well-designed surface structure, the synthesized MIS sensor had excellent flexibility and high sensitivity, which can be attached to human motion joint parts to monitor subtle human motion. More importantly, the sensor had outstanding stimulus response and recognition of multiple stimuli in underwater conditions, which was used to monitor water wave vibrations in real time. The MIS sensor exhibits stable and excellent sensing performance for different frequencies of water waves, and this unique property made the MIS sensor applicable for the monitoring of wave motion at the sea surface. This provides an idea for the development of sensing devices for ocean monitoring. The ocean is rich in biological and mineral resources, and good marine environment monitoring technology is an important technical guarantee for the development of marine resources. In the future, underwater adhesion hydrogel materials are expected to be ideal underwater sensing materials for the development of marine resources. Synthesizing an underwater sensing gel that can conduct stably for a long time and achieve reliable real-time transmission of data will play a very important role in human understanding of the ocean, early warning of catastrophic climate, and environmental protection. R. Zhang, H. Peng, T. Zhou, Y. Yao, X. Zhu, B. Bi, X. Zhang, B. Liu, L. Niu and W. Wang, ACS Appl. Polym. Mater., 2019, 1, 2883–2889 CrossRef CAS . Intermolecular forces in hydrogel cohesion. The cohesion of underwater adhesion hydrogels can be provided by intermolecular forces synergistically with chemical crosslinks, 74 or by physical crosslinks formed entirely by intermolecular forces. 75,76 The high bond energy of chemical crosslinking provides the hydrogel with certain structural strength, but the covalent bond does not self-heal after breaking. The intermolecular force on the basis of chemical crosslinking can make the crosslinked network of the hydrogel have certain recovery properties. Since the physically crosslinked hydrogels formed by different intermolecular forces are influenced by different environments, smart adhesion can be achieved by adjusting the environment. In the underwater adhesion hydrogel, the synergistic effect of the dominant hydrogen bonding, electrostatic interaction and hydrophobic interaction provides the hydrogel with excellent underwater cohesion. Changing the number of different intermolecular force species can affect the mechanical properties of hydrogels. This subsection will describe the effects of different intermolecular forces and partial synergies on the cohesion of underwater adhesion hydrogels. You only need to hold it in place, applying pressure for a slow 5 count. If you used enough glue, the glue should now support the plant without your help.

underwater capillary adhesion | Nature Electrically switched underwater capillary adhesion | Nature

Coordination bonds are a type of covalent bond between hydrogels and metals or metal oxides to achieve underwater adhesion. It is worth noting that coordination bonds are reversible, so the coordination bonds not only maintain the stability of the covalent bond, but also endow the hydrogel with reversible underwater adhesion properties. In addition, the binding of coordination bonds is pH dependent. Taking the catechol group as an example, for a specific metal oxide: titanium dioxide, at pH ∼ 8, the catechol group will form two complexes with the titanium ion. A hydrogen bond and a coordination bond are formed at pH ∼ 7 ( Fig. 1E). 56–60 Coordination bonds are much stronger than hydrogen bonds, so the underwater adhesion strength of hydrogels can be controlled by adjusting pH. Coordination bonds not only affect the underwater adhesion strength of hydrogels, but also have a certain influence on the cohesion of hydrogels. It is also pH dependent, using the ability of catechol to chelate metal ions, the stoichiometry of catechol and Fe 3+ chelation changes from less to more by adjusting the pH from acidic to weakly alkaline ( Fig. 1F). 61,62 This pH-controlled cross-linking degree can indirectly affect the cohesion of the hydrogel, so that the hydrogel can be adjusted to change the mechanical strength according to the actual situation underwater. 56,63,64 X. Liu, Q. Zhang, L. Duan and G. Gao, ACS Appl. Mater. Interfaces, 2019, 11, 6644–6651 CrossRef CAS PubMed . Y. Cao, N. Liu, C. Fu, K. Li, L. Tao, L. Feng and Y. Wei, ACS Appl. Mater. Interfaces, 2014, 6, 2026–2030 CrossRef CAS PubMed .

Q. Zhao, D. W. Lee, B. K. Ahn, S. Seo, Y. Kaufman, J. N. Israelachvili and J. H. Waite, Nat. Mater., 2016, 15, 407–412 CrossRef CAS . There is not a lot more frustrating than waking up to discover that the moss and other saplings you planted the night before are all floating on the surface of your aquarium. C. Shao, M. Wang, H. Chang, F. Xu and J. Yang, ACS Sustainable Chem. Eng., 2017, 5, 6167–6174 CrossRef CAS .