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Howard E, Li M, Kozma M, Zhao J, Bae J. Self-strengthening stimuli-responsive nanocomposite hydrogels. NANOSCALE 2022; 14:17887-17894. [PMID: 36448666 DOI: 10.1039/d2nr05408f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
Stimuli-responsive hydrogels with self-strengthening properties are promising for the use of autonomous growth and adaptation systems to the surrounding environments by mimicking biological materials. However, conventional stimuli-responsive hydrogels require structural destruction to initiate mechanochemical reactions to grow new polymeric networks and strengthen themselves. Here we report continuous self-strengthening of a nanocomposite hydrogel composed of poly(N-isopropylacrylamide) (PNIPAM) and nanoclay (NC) by using external stimuli such as heat and ionic strength. The internal structures of the NC-PNIPAM hydrogel are rearranged through the swelling-deswelling cycles or immersing in a salt solution, thus its mechanical properties are significantly improved. The effects of concentration of NC in hydrogels, number of swelling-deswelling cycles, and presence of salt in the surrounding environment on the mechanical properties of hydrogels are characterized by nanoindentation and tensile tests. The self-strengthening mechanical performance of the hydrogels is demonstrated by the loading ability. This work may offer promise for applications such as artificial muscles and soft robotics.
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Affiliation(s)
- Elizabeth Howard
- Department of Nanoengineering, University of California, San Diego, La Jolla, CA, 92093, USA.
| | - Minghao Li
- Materials Science and Engineering Program, University of California San Diego, La Jolla, CA 92093, USA
| | - Michael Kozma
- Department of Nanoengineering, University of California, San Diego, La Jolla, CA, 92093, USA.
| | - Jiayu Zhao
- Department of Nanoengineering, University of California, San Diego, La Jolla, CA, 92093, USA.
| | - Jinhye Bae
- Department of Nanoengineering, University of California, San Diego, La Jolla, CA, 92093, USA.
- Materials Science and Engineering Program, University of California San Diego, La Jolla, CA 92093, USA
- Chemical Engineering Program, Department of Nanoengineering, University of California, San Diego, La Jolla, CA 92093, USA
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Razavi-Nouri M, Sabet A, Tayefi M. Effect of dynamic curing time on thermal, mechanical and rheological behavior of organoclay-containing nanocomposite based on ethylene-octene copolymer. JOURNAL OF POLYMER RESEARCH 2017. [DOI: 10.1007/s10965-017-1262-z] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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3
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Zhao X, Bai L, Bao RY, Liu ZY, Yang MB, Yang W. Excellent mechanical performance and enhanced dielectric properties of OBC/SiO2 elastomeric nanocomposites: effect of dispersion of the SiO2 nanoparticles. RSC Adv 2017. [DOI: 10.1039/c7ra08074c] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A chain-like network structure and irregular dispersion of fillers are formed in OBC/SiO2 nanocomposites. Excellent mechanical performance and enhanced dielectric properties of OBC/SiO2 elastomeric nanocomposites are realized due to the peculiar chain-like network of the fillers.
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Affiliation(s)
- Xing Zhao
- College of Polymer Science and Engineering
- Sichuan University
- State Key Laboratory of Polymer Materials Engineering
- Chengdu
- China
| | - Lu Bai
- College of Polymer Science and Engineering
- Sichuan University
- State Key Laboratory of Polymer Materials Engineering
- Chengdu
- China
| | - Rui-Ying Bao
- College of Polymer Science and Engineering
- Sichuan University
- State Key Laboratory of Polymer Materials Engineering
- Chengdu
- China
| | - Zheng-Ying Liu
- College of Polymer Science and Engineering
- Sichuan University
- State Key Laboratory of Polymer Materials Engineering
- Chengdu
- China
| | - Ming-Bo Yang
- College of Polymer Science and Engineering
- Sichuan University
- State Key Laboratory of Polymer Materials Engineering
- Chengdu
- China
| | - Wei Yang
- College of Polymer Science and Engineering
- Sichuan University
- State Key Laboratory of Polymer Materials Engineering
- Chengdu
- China
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4
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Sui G, Zhao Y, Zhang Q, Fu Q. Enhanced mechanical properties of olefin block copolymer by adding a quaternary ammonium salt functionalized graphene oxide. RSC Adv 2016. [DOI: 10.1039/c6ra11451b] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
Abstract
Large mechanical properties enhancement of OBC via blending with chemical modification CTAB-GO.
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Affiliation(s)
- Guopeng Sui
- College of Polymer Science and Engineering
- State Key Laboratory of Polymer Materials Engineering
- Sichuan University
- Chengdu 610065
- China
| | - Yongsheng Zhao
- College of Polymer Science and Engineering
- State Key Laboratory of Polymer Materials Engineering
- Sichuan University
- Chengdu 610065
- China
| | - Qin Zhang
- College of Polymer Science and Engineering
- State Key Laboratory of Polymer Materials Engineering
- Sichuan University
- Chengdu 610065
- China
| | - Qiang Fu
- College of Polymer Science and Engineering
- State Key Laboratory of Polymer Materials Engineering
- Sichuan University
- Chengdu 610065
- China
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5
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Tong ZZ, Huang Y, Xu JT, Fu ZS, Fan ZQ. Chain Structure, Aggregation State Structure, and Tensile Behavior of Segmented Ethylene–Propylene Copolymers Produced by an Oscillating Unbridged Metallocene Catalyst. J Phys Chem B 2015; 119:6050-61. [DOI: 10.1021/acs.jpcb.5b01845] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Zai-Zai Tong
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science & Engineering, Zhejiang University, Hangzhou 310027, China
| | - Yao Huang
- State
Key Laboratory of Chemical Engineering, Department of Chemical and
Biological Engineering, Zhejiang University, Hangzhou 310027, China
| | - Jun-Ting Xu
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science & Engineering, Zhejiang University, Hangzhou 310027, China
| | - Zhi-Sheng Fu
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science & Engineering, Zhejiang University, Hangzhou 310027, China
| | - Zhi-Qiang Fan
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science & Engineering, Zhejiang University, Hangzhou 310027, China
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6
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He P, Chen B, Yu W, Zhou C. Liquid–solid transition in mesophase separated olefin multiblock copolymers during crystallization. RSC Adv 2015. [DOI: 10.1039/c5ra05030h] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
A delayed liquid–solid transition has been found in strongly segregated olefin multiblock copolymers, compared to that in weakly segregated systems.
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Affiliation(s)
- Peng He
- Advanced Rheology Institute
- Department of Polymer Science and Engineering
- Shanghai Jiao Tong University
- Shanghai 200240
- P. R. China
| | - Bin Chen
- Advanced Rheology Institute
- Department of Polymer Science and Engineering
- Shanghai Jiao Tong University
- Shanghai 200240
- P. R. China
| | - Wei Yu
- Advanced Rheology Institute
- Department of Polymer Science and Engineering
- Shanghai Jiao Tong University
- Shanghai 200240
- P. R. China
| | - Chixing Zhou
- Advanced Rheology Institute
- Department of Polymer Science and Engineering
- Shanghai Jiao Tong University
- Shanghai 200240
- P. R. China
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7
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Tong ZZ, Huang J, Zhou B, Xu JT, Fan ZQ. Self-nucleation behaviors of olefinic blocky copolymer/montmorillonite nanocomposites with collapsed and intercalated clay layers. J Appl Polym Sci 2014. [DOI: 10.1002/app.41771] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Affiliation(s)
- Zai-Zai Tong
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization; Department of Polymer Science and Engineering; Zhejiang University; Hangzhou 310027 China
| | | | - Bing Zhou
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization; Department of Polymer Science and Engineering; Zhejiang University; Hangzhou 310027 China
| | - Jun-Ting Xu
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization; Department of Polymer Science and Engineering; Zhejiang University; Hangzhou 310027 China
| | - Zhi-Qiang Fan
- MOE Key Laboratory of Macromolecular Synthesis and Functionalization; Department of Polymer Science and Engineering; Zhejiang University; Hangzhou 310027 China
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Li Z, Shi Y, Liu H, Chen F, Zhang Q, Wang K, Fu Q. Effect of melting temperature on interfacial interaction and mechanical properties of polypropylene (PP) fiber reinforced olefin block copolymers (OBCs). RSC Adv 2014. [DOI: 10.1039/c4ra06548d] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Transcrystalline structures for the first time were observed at the interface of OBC/PP fiber, proving that the partially melted (170 °C) and totally melted (190 °C) PP fibers have stronger interactions with OBC than unmelted PP fibers does.
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Affiliation(s)
- Zhen Li
- College of Polymer Science and Engineering
- State Key Laboratory of Polymer Materials Engineering
- Sichuan University
- Chengdu 610065, China
| | - Yunjie Shi
- College of Polymer Science and Engineering
- State Key Laboratory of Polymer Materials Engineering
- Sichuan University
- Chengdu 610065, China
| | - Huili Liu
- College of Polymer Science and Engineering
- State Key Laboratory of Polymer Materials Engineering
- Sichuan University
- Chengdu 610065, China
| | - Feng Chen
- College of Polymer Science and Engineering
- State Key Laboratory of Polymer Materials Engineering
- Sichuan University
- Chengdu 610065, China
| | - Qin Zhang
- College of Polymer Science and Engineering
- State Key Laboratory of Polymer Materials Engineering
- Sichuan University
- Chengdu 610065, China
| | - Ke Wang
- College of Polymer Science and Engineering
- State Key Laboratory of Polymer Materials Engineering
- Sichuan University
- Chengdu 610065, China
| | - Qiang Fu
- College of Polymer Science and Engineering
- State Key Laboratory of Polymer Materials Engineering
- Sichuan University
- Chengdu 610065, China
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