Preparation and Oil Absorption Property of Polyurethane/Polyvinylidene Fluoride Hexafluoropropylene Nanofiber Hydrophobic Sponge

doi:10.19491/j.issn.1001-9278.2021.02.008

Abstract

Abstract:

A type of hydrophobic/oleophilic functional commercial sponges based on polyurethane （PU）/poly（vinylidene fluoride hexafluoropropylene）（PVDFHFP） nanofibers composites was successfully prepared through an electrospinning technology at a high relative humidity of 90 % and a short collection distance of 6 cm. The morphology and structure of the composite sponge were characterized by SEM， FTIR and XRD， and its oil absorption performance was investigated. The results indicated that the PVDF-HFP nanofibers and PU were partially dissolved and mixed at the interface due to the solvent action of N， N-dimethyl formamide， resulting in a strong binding force. The sponges exhibited excellent hydrophobic properties and a good oil absorption ability with an oil absorption capacity of 30.8 g/g for olive oil， 25.2 g/g for lubricating oil， 16.8 g/g for dimethyl silicone oil and 26.4 g/g for n-hexane. The sponges also showed an excellent reusability， and their oil absorption could still maintain 97.2 % of the original capacity after 50 times cycles.

Key words: hydrophobicity, sponge, polyurethane, oil absorption, polyvinylidene fluoride hexafluoropropylene

CLC Number:

TQ323

LIU Zhi, HUANG Xiaohai, GAO Bing, WU Bo, RUAN Fangtao. Preparation and Oil Absorption Property of Polyurethane/Polyvinylidene Fluoride Hexafluoropropylene Nanofiber Hydrophobic Sponge[J]. China Plastics, 2021, 35(2): 46-51.

Figures/Tables 9

纺丝参数	浓度/%	电压/kV	湿度/%	温度/°C	接收距离/cm
数值	18	18	90	20	6

Tab. 1. The preparation parameters of PU/hydrophobic PVDF?HFP nanofiber sponge

Fig.1. The schematic diagram of preparation of PU/hydrophobic PVDF?HFP nanofiber sponge

Fig.2. The morphology and wettability of PU sponge and PU/PVDF?HFP sponge

Fig.3. FTIR spectrum of PU/PVDF?HFP nanofiber sponge

Fig.4. XRD spectrum of PU/PVDF?HFP nanofiber sponge

Fig.5. The oil absorption process of PU/PVDF?HFP nanofiber sponge

Fig.6. The oil absorption property of PU/PVDF?HFP nanofiber sponge

Fig.7. The elastic recovery property of PU/PVDF?HFP nanofiber sponge

Fig.8. The reusability of PU/PVDF?HFP nanofiber sponge

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