In this study, the waste onion was chosen and used as the matrix material, and the bamboo pulps and tussah silk fibers were used as reinforcing materials. By efficient mixing process, a new type bio‐composite with excellent mechanical and antibacterial properties was developed by papermaking method. The tensile property and antibacterial action were studied in detail. The consequence indicated that the onion had definite matrix property, and the mechanical properties were further improved by adding bamboo pulps and tussah silk fibers. With the fiber content increasing, the tensile properties of composites increased, and the tussah silk/onion composite exhibited the better tensile properties than that of bamboo/onion composite. The flavonoids extracted from abandoned onion skins can be used as the antibacterial finishing agent to improve the inhibition property of the tussah silk/onion composite. The experiment consequence indicated that the finished composite had a certain antibacterial action against Staphylococcus aureus and Escherichia coli.

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A porous polypropylene (PP) film was fabricated by an original crazing process using bending. The film has a lot of porous layers which are independent each other, and has possibility to apply as a Li‐ion battery separator. Moreover, we paid attention that a craze is generated from the outer surface of the bending part during the crazing process. Therefore, the outer surface of the bending part of PP film was coated with polystyrene or polymethylmethacrylate, and the crazing process was carried out. As a consequence, it was revealed that the composite structure of the craze could be controlled by surface coating of polymer which has lower craze‐generating stress than PP. And its composite structure derived from that of the coated layer. By this method, a separator film which has many more porous layer and high gas permeability was fabricated.

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Bio‐based ferulic acid (FA), (E)‐3‐(4‐hydroxy‐3‐methoxyphenyl)prop‐2‐enoic acid was converted to 1,2‐disubstituted ethylenic monomer (FA1) via methyl esterification followed by silylation with tert‐butyldimethylsilyl chloride. Radical copolymerization of FA1 with styrene (St), methyl methacrylate (MMA), and 4‐acetoxy‐3‐methoxystyrene (FA2) prepared from FA were carried out using azobisisobutyronitrile as an initiator at 80℃. It is found that FA1 was copolymerized with St and FA2, but not with MMA. The formation of copolymers was confirmed by ¹H‐ and ¹³C‐NMR analyses. The reactivity ratios of FA1 and St estimated by the Fineman‐Ross method are r_FA1=0.12 and r_St=2.46. In the case of the copolymerization of FA1 with FA2, the reactivity ratios, r_FA1=0.13 and r_FA2=2.66 were determined.

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