期刊
ACS NANO
卷 14, 期 1, 页码 1045-1054出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsnano.9b08595
关键词
environmentally friendly; high-performance; fluorine-free; waterborne; waterproof and breathable
类别
资金
- National Key R&D Program of China [2016YFB0303200]
- Fundamental Research Funds for the Central Universities [2232019G-01, 18D310104]
- Program for Professor of Special Appointment (Eastern Scholar) at Shanghai Institutions of Higher Learning [TP2016019]
- Shanghai Rising-Star Program [16QA1400200]
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, Donghua University [KF1824]
Waterproof and breathable membranes (WBMs) with simultaneous environmental friendliness and high performance are highly desirable in a broad range of applications; however, creating such materials still remains a tough challenge. Herein, we present a facile and scalable strategy to fabricate fluorine-free, efficient, and biodegradable WBMs via step-by-step dip-coating and heat curing technology. The hyperbranched polymer (ECO) coating containing long hydrocarbon chains provided an electrospun cellulose acetate (CA) fibrous matrix with high hydrophobicity; meanwhile, the blocked isocyanate cross-linker (BIC) coating ensured the strong attachment of hydrocarbon segments on CA surfaces. The resulting 'membranes (TCA) exhibited integrated properties with waterproofness of 102.9 kPa, breathability of 12.3 kg m(-2) d(-1), and tensile strength of 16.0 MPa, which are much superior to that of previously reported fluorine-free fibrous materials. Furthermore, TCA membranes can sustain hydrophobicity after exposure to various harsh environments. More importantly, the present strategy proved to be universally applicable and effective to several other hydrophilic fibrous substrates. This work not only highlights the material design and preparation but also provides environmentally friendly and high-performance WBMs with great potential application prospects for a variety of fields.
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