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In this study, a method of recycling spent coffee grounds (SCG) is introduced. The SCG was dried and crushed into micron-sized coffee particles. The coffee particles could be used to prepared polyurethane (PU) films with different contents (0wt.%, 5wt.%, 10wt.%, 15wt.%, 20wt.%, 25wt.% and 30wt.%). The anti-ultraviolet property, thermal comfort performance and mechanical property of different PU films were measured. The results showed that after the blending of coffee particles, the films exhibited excellent anti-ultraviolet property and thermal comfort performance, and the mechanical properties were also retained. This study also provided an effective approach to reuse SCG, which is consistent with the environmental-friendly society principle.

Polyethylene terephthalate (PET) fiber is a kind of widely used textile fiber due to its some desirable properties. However, it limited its application in clothing because of poor hydrophilic property and high static electric. In order to improve hydrophilic and antistatic properties of PET fabrics, β-cyclodextrin (β-CD) was finished onto them with citric acid (CA) as crosslinking agent. SEM showed that β-CD was finished successfully onto PET fibers. Moisture liberation curve indicated that the finished PET fabrics possessed favorable hydrophilic property. However, water vapor transport property of the finished PET fabrics slightly decreased. Antistatic property of PET fabrics finished by β-CD acquired improvement. In addition, tensile properties of PET fabric also were enhanced after finishing.

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A novel kind of efficient solid polymer electrolyte (SPE) based on crosslinked polyester matrix has been prepared by employing low molecular weight PEG (oligo-PEG, Mw = 400 g/mol), followed by crosslinking of the PEG with citric acid (CA). The oligo-PEG, with small coil size, can be easily penetrated into mesopores of TiO2 photoelectrode, while the mechanical stability of the SPE can also be maintained by crosslinking. The factor of weight ratio of CA cross linker in the hybrid plays an important role in determining the intersegmental distance and free volume of the polymer matrix, which sequentially affects the electrochemical activity of the conductive ions and then the ionic conductivity of the polymer electrolyte. By using the 32.4 wt.% CA in the matrix, the SPE with the optimal room temperature conductivity (σ) of 5.43×10-5 S/cm was obtained.