Advanced Materials Research Vols. 535-537

Abstract: Shell is a natural composite material with excellent mechanical property. it is a model of biomimetic composites. In the paper, the morphology of the scallop (patinopecten yessoensis) shell was observed by SEM. The results are shown that the shell is composed by the tertiary structure. The primary one is the layered structure, the secondary one is prism-shaped fibre cluster similar to rectangle and end of arrow shaped, tertiary structure is lathy fibre, angle-shaped fibre, prism shaped fibre and scales. The tough structure of shell has reference value for bionic, this is also the purpose of the microscopic structure model of scallop shell in the paper.

Abstract: The frame-board type furniture was born due to people’s preference of solid wood. This paper analyzed the composed mode of parts of the frame-board type furniture (FBF) and the sense of solid wood (SSW). By visual frame structure form, the plate structure in reality and pretty detailed design can strengthen the SSW of FBF. Some manufacturing and surface decoration techniques were introduced in this paper.

Abstract: Biodegradable cationic micelles were prepared from P(PEGMEMA)-PDMAEMA-PCL-PDMAEMA-P(PEGMEMA) five blocks copolymers by reversible addition-fragmentation chain transfer (RAFT) polymerization with CPADB-PCL-CPADB (CPADB: 4-Cyanopentanoic acid dithiobenzoate; PCL: 5600 Da) as a macro-RAFT agent. These five blocks copolymers formed nano-sized micelles in water.

Abstract: Being interested in the development of lignin-containing polymeric materials had been investigated in this paper and the lignin/LDPE-EVA blends compatibilized with LDPE-g-MAH prepared in rheometer were characterized by rheological properties. The experimental results indicated that the maximum, balanced torque and plasticized time were lowest to 53.7N.m-1 and 11.7N.m-1 75s, respectively, with compatibilizer additon of 10 parts. In addtion, mechanical properties, FT-IR, SEM and DSC-TG were measured and the results revealed that the compatibility and miscibility of lignin/LDPE-EVA blends were improved obviously.

Abstract: a graft copolymer has been synthesized by reaction of acrylamide (AM) with methacryloyl chloride guar gum (MAG). The reaction condition was optimized, and the graft copolymer was characterized by FTIR and Scanning electron microscopy (SEM). Moreover the absorption behavior of the graft copolymer to metal ions at different conditions was studied.

Abstract: A solid phase bisphenol-S bis(diphenyl phosphate)(BSDP), Poly Phenoxyl Bisphenol-S Phosphate（S-BSDP）was synthesized from phosphorus oxychloride, phenol and bisphenol-A in two step sythesis route. The influence factors on the yield and molecular weight of S-BSDP were investigated by the means of orthogonal design. The structure of S-BSDP was characterized with Fourier Transform Infrared Spectroscopy (FTIR). The molecular weight was determined by Gel Permeation Chromatography (GPC). Thermal stability of S-BSDP was studied by Thermal Gravimetric Analysis (TGA). The results review that S-BSDP was synthesized successfully and its structure is similar to BSDP. Its thermal decomposition temperature is much higher than liquid phase BSDP.

Abstract: Nano-hydroxyapatite were modified with biocompatible polyethylene glycol (PEG) by surface coating, so modified nano-hydroxyapatite particles (modified nano-HA) were prepared. A homogeneous solution was obtained by dispersing the modified nano-HA into poly l-lactic acid (PLLA) solution. Composite fibrous scaffold was fabricated via electrostatic spinning method with the homogeneous solution. The composite fibrous scaffold was characterized by SEM, TEM and XRD techniques. The characterization results showed that the surface morphology of the composite fibrous scaffold was smooth, modified nano-HA was dispersed in PLLA homogeneously, the hydrophilicity of composite fibrous scaffold were increased obviously. Adipose-derived stem cells (ADSCs) proliferating in the fibrous scaffold were investigated by using laser scanning confocal microscope observation.

Abstract: Lithium salts were dissolved in ionic liquid [Amim]Cl, and their dissolution behavior were tested by turbidimeter. It is found that the solubility of LiCl in [Amim]Cl is up to 14g/100g [Amim]Cl at 70°C, and it keeps growing as the temperature increase. Turbidity of cellulose solution in [Amim]Cl at 70°C was obtained, but the solubility of high concentration cellulose solution could not be demonstrated accurately in this way. Cellulose solutions with [Amim]Cl or [Amim]Cl/lithium salts as solvents at different temperature were obtained, in which the lithium salts were 1wt%(mass fraction of [Amim]Cl), polarization microscope was used to observe the dissolution behavior of cellulose. The solubility of cellulose would increased as temperature rose, and the solubility of cellulose in [Amim]Cl/1wt%LiCl reached 11.9%(mass fraction of [Amim]Cl) at 80°C, which was higher than in [Amim]Cl 9.4% at 80°C. It is found that the addition of lithium salts into [Amim]Cl can really improve the solubility of cellulose than in [Amim]Cl.

Abstract: Neural stem cells (NSCs), as therapeutic agents, play the key role in the treatment of central nervous system (CNS) disorders. It is a researching tendency for promote proliferation and differentiation of neural stem cells by using tissue engineering. It is discovered that joint use neural stem cells and NSCs-seeded scaffold may increase the cell survival state and better control cellular microenvironment. We find suitable material include natural biological materials, synthetic materials, compound materials, bio-derived materials and 3D-materials of neural stem cells tissue engineering by analyzing and summing up of the research which combine tissue engineering with NSCs transplant in past several years. It hold out a hope of the possibility of utilizing the treatment of neural stem cells transplantation with tissue engineering, and there has been a great quantity of achievements on the research of it to treat CNS disorders by promote proliferation and differentiate.

Abstract: The effects of calcination on preparation of needle coke were studitied.The relationship between structureand and property of needle coke that was prepared under calcination were characterized by SEM,XRD and FT-IR analysis.The results indicated that the effect of calcination on the preparation of needle coke was positive．The higher temperature of caclineing and the longer time of caclineing，the better the ordered degree of needle coke and its fibrous texture. The incomeing of N2 can increase the ordered degree. FeCl3 which was a sublimate material was prejudiced to the graphitization of the needle coke. Through the observation of microstructure,we could find that there were some sample particles existing surface,thinking the particles were Fe ions,which was unhelpful for the preparation of needle coke.