Journal
SOFT MATTER
Volume 11, Issue 43, Pages 8452-8459Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c5sm01463h
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Funding
- pre-research foundation of the national science foundation
- Fundamental Research Funds for the Central Universities
- fund for the analysis and testing of the large-scale apparatus
- Scientific Research Foundation of Graduate School of Southeast University
- Prof. Dr Guzhongze's group
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If self-healing materials can be prepared via simple technology and methods using nontoxic materials, this would be a great step forward in the creation of environmentally friendly self-healing materials. In this paper, the specific structural parameters of the various hydrogen bonds between chitosan (CS) and polyacrylic acid (PAA) were calculated. Then, multilayer polyelectrolyte films were fabricated with CS and PAA based on layer-by-layer (LbL) self-assembly technology at different pH values. The possible influence of pH on the (CS/PAA) x 30 multilayer polyelectrolyte film was investigated. The results show that the interactions between CS and PAA, swelling capacity, microstructure, wettability, and self-healing ability are all governed by the pH of the CS solution. When the pH value of the CS solution is 3.0, the prepared multilayer polyelectrolyte film (CS3.0/PAA2.8) x 30 has fine-tuned interactions, a network-like structure, good swelling ability, good hydrophilicity, and excellent self-healing ability. This promises to greatly widen the future applications of environmentally friendly materials and bio-materials.
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