Papers by Author: Jiang Zhu

Abstract: Poly (ethylene terephthalate) (PET)/SiO₂/TiO₂ hybrid composites were synthesized via the sol-gel method in the presence of tetraethylorthosilicate (TEOS) and tetrabutyltitanate (TBT). The formation of Si-O-Ti bonds in the resulting products was confirmed by Fourier transform infrared spectroscopy (FTIR) analysis. The Photo-degradation properties of hybrid composites were investigated under the ultraviolet radiation. And the change of the intrinsic viscosity for the hybrid composites was measured using an Ubbelohde viscometer after the photo-degradation.

Abstract: The ethylene-propylene polymer (PP) was modified by using a rare earth β-nucleating agent (WBG-II). The crystallization characteristics of PP induced by WBG-II were investigated through the wide-angle X-ray diffraction (WAXD). The effect of β-nucleating agent on the mechanical property of PP under low temperature was also researched. The results confirmed that β-nucleating agent WBG-II can change the crystal structure of PP and induce the β-form crystals in the PP to develop. Moreover, under the room temperature, with the increment of WBG-II, the tensile strength, bending strength and modulus of the modified PP increase, but the impact strength and elongation at break decrease; and especially at-10 °C, this tendency is more obvious.

Abstract: Europium (III), acrylic acid and 1,10-phenanthroline three ternary complexes was synthesized with acrylic acid (AA) as the first ligand and 1,10-phenanthroline as the second ligand. Tri-cellulose acetate (TCA)/Eu (AA)₃Phen hybrid material was prepared by the method of solution blend, dimethyl sulfoxide (DMSO) as the mutual solvent. The Fourier transform infrared spectroscopy (FT-IR) results confirmed the molecular structure of the Eu (AA)₃Phen complex and the formation of the doping TCA/Eu (AA)₃Phen hybrid material.

Abstract: Poly (ethylene terephthalate) (PET)/SiO2/TiO2 hybrid composites were prepared via the Sol-gel method that involves two steps: the as-prepared PET was dissolved into the mixed solution of phenol and dichloroethane by adjusting the pH value of the reaction system to 2～3 using acetic acid; then both the tetraethylorthosilicate (TEOS) and the tetrabutyltitanate (TBT) were successively added to the hybrid solution followed by the Sol-Gel reactions at strong stirring to form the three PET/SiO2/TiO2 composites with cohydrolysis-condensation reaction. The intrinsic viscosity of the hybrid composites were measured by using an Ubbelohde viscometer. The resulting products with the different SiO2-TiO2 content were thoroughly characterized with FT-IR.

Abstract: A new cellulose graft copolymer was synthesized by the lipase-catalyzed ring-opening polymerization of ρ-dioxanone (PDO) onto cellulose in 1-N-butyl-3-methylimidazolium chloride ([Bmim]Cl). The structure of the copolymer was characterized by FT-IR and 1H-NMR. The obtained copolymers exhibited the different thermal stability by TGA after the graft copolymerization. The reaction media applied can be easily recycled and reused.

Abstract: A new biodegradable copolymer of cellulose diacetate and poly(p-dioxanone) (PPDO) was prepared through a couple-grafting procedure. PPDO was functionalized with the isocyanate group, and then PPDO terminated with the isocyanate group was enabled to react with the hydroxyl groups of cellulose diacetate. The length of PPDO graft chains can be controlled easily by using the prepolymers of PPDO with different molecular weights. The resulting products were thoroughly characterized with FT-IR, ¹H-NMR. The mechanical properties of the copolymers were affected greatly by the length of PPDO segment.

Abstract: A new amphiphilic copolymer of hydroxyethyl cellulose and poly(p-dioxanone) (PPDO) was prepared through the ring-opening copolymerization in IL 1-N-butyl-3-methylimidazolium chloride ([Bmim]Cl). The resulting products were thoroughly characterized with FT-IR, ¹H-NMR and TG. The copolymer is hopeful for the use as tissue engineering materials and the ionic liquid as the reaction media can be easily recycled and reused

Abstract: The development of bulletproof materials indicates the military and scientific strength of a country in the fields of modern national defenses and military affairs. With the advancement and development of scientific technologies in the world of human being, the bulletproof materials experienced the changes from the ordinary natural plants or simple metal substances to the synthetic composite materials with high intensity. In this work, we emphasized the applications of some advanced composite materials and their study in bulletproof fields.