Material assembly from collective action of shape-changing polymers
Source abstract
Abstract
Some animals form transient, responsive and solid-like ensembles through dynamic structural interactions. These ensembles demonstrate emergent responses such as spontaneous self-assembly, which are difficult to achieve in synthetic soft matter. Here we use shape-morphing units comprising responsive polymers to create solids that self-assemble, modulate their volume and disassemble on demand. The ensemble is composed of a responsive hydrogel, liquid crystal elastomer or semicrystalline polymer ribbons that reversibly bend or twist. The dispersions of these ribbons mechanically interlock, inducing reversible aggregation. The aggregated liquid crystal elastomer ribbons have a 12-fold increase in the yield stress compared with cooled dispersion and contract by 34% on heating. Ribbon type, concentration and shape dictate the aggregation and govern the global mechanical properties of the solid that forms. Coating liquid crystal elastomer ribbons with a liquid metal begets photoresponsive and electrically conductive aggregates, whereas seeding cells on hydrogel ribbons enables self-assembling three-dimensional scaffolds, providing a versatile platform for the design of dynamic materials.
Source: europepmc · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Advanced Materials and Mechanics · Micro and Nano Robotics · Advanced Sensor and Energy Harvesting Materials
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (55)
Show source-provided references
1. Diller, E., Zhang, N. & Sitti, M. Modular micro-robotic assembly through magnetic actuation and thermal bonding. J. Micro-Bio Robot. 8, 121–131 (2013).10.1007/s12213-013-0071-7 ↗
2. Yang, X., Tan, R., Lu, H., Fukuda, T. & Shen, Y. Milli-scale cellular robots that can reconfigure morphologies and behaviors simultaneously. Nat. Commun. 13, 4156 (2022).10.1038/s41467-022-31913-0 ↗
3. Fan, X., Dong, X., Karacakol, A. C., Xie, H. & Sitti, M. Reconfigurable multifunctional ferrofluid droplet robots. Proc. Natl Acad. Sci. USA 117, 27916–27926 (2020).10.1073/pnas.2016388117 ↗
4. Hu, D. L., Phonekeo, S., Altshuler, E. & Brochard-Wyart, F. Entangled active matter: from cells to ants. Eur. Phys. J. Spec. Top. 225, 629–649 (2016).10.1140/epjst/e2015-50264-4 ↗
5. Vernerey, F. J. et al. Biological active matter aggregates: inspiration for smart colloidal materials. Adv. Colloid Interface Sci. 263, 38–51 (2019).10.1016/j.cis.2018.11.006 ↗
6. Metzmacher, J., Poty, M., Lumay, G. & Vandewalle, N. Self-assembly of smart mesoscopic objects. Eur. Phys. J. E 40, 108 (2017).10.1140/epje/i2017-11599-y ↗
7. Dierichs, K. & Menges, A. Towards an aggregate architecture: designed granular systems as programmable matter in architecture. Granular Matter 18, 25 (2016).10.1007/s10035-016-0631-3 ↗
8. Wagner, R. J., Such, K., Hobbs, E. & Vernerey, F. J. Treadmilling and dynamic protrusions in fire ant rafts. J. R. Soc. Interface 18, 20210213 (2021).10.1098/rsif.2021.0213 ↗
9. Grozinger, C. M., Richards, J. & Mattila, H. R. From molecules to societies: mechanisms regulating swarming behavior in honey bees (Apis spp.). Apidologie 45, 327–346 (2014).10.1007/s13592-013-0253-2 ↗
10. Patil, V. P. et al. Ultrafast reversible self-assembly of living tangled matter. Science 380, 392–398 (2023).10.1126/science.ade7759 ↗
11. Mlot, N. J., Tovey, C. A. & Hu, D. L. Fire ants self-assemble into waterproof rafts to survive floods. Proc. Natl. Acad. Sci. USA 108, 7669–7673 (2011).10.1073/pnas.1016658108 ↗
12. Anderson, C., Theraulaz, G. & Deneubourg, J.-L. Self-assemblages in insect societies. Insect Soc. 49, 99–110 (2002).10.1007/s00040-002-8286-y ↗
13. Ozkan-Aydin, Y., Goldman, D. I. & Bhamla, M. S. Collective dynamics in entangled worm and robot blobs. Proc. Natl. Acad. Sci. USA 118, e2010542118 (2021).10.1073/pnas.2010542118 ↗
14. Tennenbaum, M., Liu, Z., Hu, D. & Fernandez-Nieves, A. Mechanics of fire ant aggregations. Nat. Mater. 15, 54–59 (2016).10.1038/nmat4450 ↗
15. Foster, P. C., Mlot, N. J., Lin, A. & Hu, D. L. Fire ants actively control spacing and orientation within self-assemblages. J. Exp. Biol. 217, 2089–2100 (2014).10.1242/jeb.093021 ↗
16. Tennenbaum, M. & Fernandez-Nieves, A. Activity-driven changes in the mechanical properties of fire ant aggregations. Phys. Rev. E 96, 052601 (2017).10.1103/PhysRevE.96.052601 ↗
17. Deblais, A., Woutersen, S. & Bonn, D. Rheology of entangled active polymer-like T. tubifex worms. Phys. Rev. Lett. 124, 188002 (2020).10.1103/PhysRevLett.124.188002 ↗
18. Weiner, N., Bhosale, Y., Gazzola, M. & King, H. Mechanics of randomly packed filaments—the ‘bird nest’ as meta-material. J. Appl. Phys. 127, 050902 (2020).10.1063/1.5132809 ↗
19. Mezeix, L., Bouvet, C., Huez, J. & Poquillon, D. Mechanical behavior of entangled fibers and entangled cross-linked fibers during compression. J. Mater. Sci. 44, 3652–3661 (2009).10.1007/s10853-009-3483-y ↗
20. Rodney, D., Gadot, B., Martinez, O. R., Roscoat, S. Rdu & Orgéas, L. Reversible dilatancy in entangled single-wire materials. Nat. Mater. 15, 72–77 (2016).10.1038/nmat4429 ↗
21. Murphy, K. A., Reiser, N., Choksy, D., Singer, C. E. & Jaeger, H. M. Freestanding loadbearing structures with Z-shaped particles. Granular Matter 18, 26 (2016).10.1007/s10035-015-0600-2 ↗
22. Xin, S., Chimene, D., Garza, J. E., Gaharwar, A. K. & Alge, D. L. Clickable PEG hydrogel microspheres as building blocks for 3D bioprinting. Biomater. Sci. 7, 1179–1187 (2019).10.1039/C8BM01286E ↗
23. Muir, V. G. et al. Sticking together: injectable granular hydrogels with increased functionality via dynamic covalent inter‐particle crosslinking. Small 18, e2201115 (2022).10.1002/smll.202201115 ↗
24. Buttinoni, I. et al. Dynamical clustering and phase separation in suspensions of self-propelled colloidal particles. Phys. Rev. Lett. 110, 238301 (2013).10.1103/PhysRevLett.110.238301 ↗
25. Lazarus, C., Pouliopoulos, A. N., Tinguely, M., Garbin, V. & Choi, J. J. Clustering dynamics of microbubbles exposed to low-pressure 1-MHz ultrasound. J. Acoust. Soc. Am. 142, 3135–3146 (2017).10.1121/1.5010170 ↗
26. Xie, H. et al. Reconfigurable magnetic microrobot swarm: multimode transformation, locomotion, and manipulation. Sci. Robot. 4, eaav8006 (2019).10.1126/scirobotics.aav8006 ↗
27. Yan, J. et al. Reconfiguring active particles by electrostatic imbalance. Nat. Mater. 15, 1095–1099 (2016).10.1038/nmat4696 ↗
28. Lin, Z. et al. Light‐activated active colloid ribbons. Angew. Chem. 129, 13702–13705 (2017).10.1002/ange.201708155 ↗
29. Kessel, B. et al. 3D bioprinting of macroporous materials based on entangled hydrogel microstrands. Adv. Sci. 7, 2001419 (2020).10.1002/advs.202001419 ↗
30. Behl, M., Kratz, K., Zotzmann, J., Nöchel, U. & Lendlein, A. Reversible bidirectional shape-memory polymers. Adv. Mater. 25, 4466–4469 (2013).10.1002/adma.201300880 ↗
31. Gladman, A. S., Matsumoto, E. A., Nuzzo, R. G., Mahadevan, L. & Lewis, J. A. Biomimetic 4D printing. Nat. Mater. 15, 413–418 (2015).10.1038/nmat4544 ↗
32. Yakacki, C. M. et al. Tailorable and programmable liquid-crystalline elastomers using a two-stage thiol–acrylate reaction. RSC Adv. 5, 18997–19001 (2015).10.1039/C5RA01039J ↗
33. Sawa, Y. et al. Shape selection of twist-nematic-elastomer ribbons. Proc. Natl. Acad. Sci. USA 108, 6364–6368 (2011).10.1073/pnas.1017658108 ↗
34. Lee, K. M., Bunning, T. J. & White, T. J. Autonomous, hands‐free shape memory in glassy, liquid crystalline polymer networks. Adv. Mater. 24, 2839–2843 (2012).10.1002/adma.201200374 ↗
35. Zhao, Y. et al. Twisting for soft intelligent autonomous robot in unstructured environments. Proc. Natl. Acad. Sci. USA 119, e2200265119 (2022).10.1073/pnas.2200265119 ↗
36. Zhang, Y. et al. Seamless multimaterial 3D liquid-crystalline elastomer actuators for next-generation entirely soft robots. Sci. Adv. 6, eaay8606 (2020).10.1126/sciadv.aay8606 ↗
37. Haan, L. T., de, Schenning, A. P. H. J. & Broer, D. J. Programmed morphing of liquid crystal networks. Polymer 55, 5885–5896 (2014).10.1016/j.polymer.2014.08.023 ↗
38. Wagner, R. J. & Vernerey, F. J. Computational exploration of treadmilling and protrusion growth observed in fire ant rafts. PLoS Comput. Biol. 18, e1009869 (2022).10.1371/journal.pcbi.1009869 ↗
39. Javed, M. et al. Programmable shape change in semicrystalline liquid crystal elastomers. ACS Appl. Mater. Interfaces 14, 35087–35096 (2022).10.1021/acsami.2c07533 ↗
40. Cook, M. T., Haddow, P., Kirton, S. B. & McAuley, W. J. Polymers exhibiting lower critical solution temperatures as a route to thermoreversible gelators for healthcare. Adv. Funct. Mater. 31, 2008123 (2021).10.1002/adfm.202008123 ↗
41. Wang, Q. et al. Lightweight mechanical metamaterials with tunable negative thermal expansion. Phys. Rev. Lett. 117, 175901 (2016).10.1103/PhysRevLett.117.175901 ↗
42. Minh, N. H. & Cheng, Y. P. On the contact force distributions of granular mixtures under 1D-compression. Granular Matter 18, 18 (2016).10.1007/s10035-016-0625-1 ↗
43. Liu, A. J. & Nagel, S. R. The jamming transition and the marginally jammed solid. Annu. Rev. Condens. Matter Phys. 1, 347–369 (2010).10.1146/annurev-conmatphys-070909-104045 ↗
44. Chechetka, S. A. et al. Light-driven liquid metal nanotransformers for biomedical theranostics. Nat. Commun. 8, 15432 (2017).10.1038/ncomms15432 ↗
45. Ford, M. J. et al. A multifunctional shape-morphing elastomer with liquid metal inclusions. Proc. Natl. Acad. Sci. USA 116, 21438–21444 (2019).10.1073/pnas.1911021116 ↗
46. Tavakoli, M. et al. EGaIn‐assisted room‐temperature sintering of silver nanoparticles for stretchable, inkjet‐printed, thin‐film electronics. Adv. Mater. 30, 1801852 (2018).10.1002/adma.201801852 ↗
47. Urayama, K., Okuno, Y. & Kohjiya, S. Volume transition of liquid crystalline gels in isotropic solvents. Macromolecules 36, 6229–6234 (2003).10.1021/ma034574a ↗
48. Gelebart, A. H. et al. Photoresponsive sponge‐like coating for on‐demand liquid release. Adv. Funct. Mater. 28, 1705942 (2018).10.1002/adfm.201705942 ↗
49. Yao, C. et al. Poly(N‐isopropylacrylamide)‐clay nanocomposite hydrogels with responsive bending property as temperature‐controlled manipulators. Adv. Funct. Mater. 25, 2980–2991 (2015).10.1002/adfm.201500420 ↗
50. Zhang, J., Zheng, L., Wu, Z., Wang, L. & Li, Y. Thermoresponsive bilayer hydrogel with switchable bending directions as soft actuator. Polymer 253, 124998 (2022).10.1016/j.polymer.2022.124998 ↗
51. Shu, X. Z. et al. Attachment and spreading of fibroblasts on an RGD peptide–modified injectable hyaluronan hydrogel. J. Biomed. Mater. Res. A 68A, 365–375 (2004).10.1002/jbm.a.20002 ↗
52. Beaman, H. T. et al. Hemostatic shape memory polymer foams with improved survival in a lethal traumatic hemorrhage model. Acta Biomater. 137, 112–123 (2022).10.1016/j.actbio.2021.10.005 ↗
53. Landsman, T. L. et al. Design and verification of a shape memory polymer peripheral occlusion device. J. Mech. Behav. Biomed. Mater. 63, 195–206 (2016).10.1016/j.jmbbm.2016.06.019 ↗
54. Dinkgreve, M., Paredes, J., Denn, M. M. & Bonn, D. On different ways of measuring ‘the’ yield stress. J. Non-Newtonian Fluid Mech. 238, 233–241 (2016).10.1016/j.jnnfm.2016.11.001 ↗
55. Perge, C., Taberlet, N., Gibaud, T. & Manneville, S. Time dependence in large amplitude oscillatory shear: a rheo-ultrasonic study of fatigue dynamics in a colloidal gel. J. Rheol. 58, 1331–1357 (2014).10.1122/1.4887081 ↗