Advanced Materials Research Vol. 427

Abstract: Gemini benzimidazole cationic surfactant, propanediyl-α, ω-bis-(N-dodecyl benzimidazole ammonium bromide), referred as BIMGCS12-3, was synthesized from the raw materials of benzimidazole, dodecane bromide and dibromopropane. The structure of the target compound was confirmed by ¹H NMR, elemental analysis and melting point measurements. Its surface properties were determined and corrosion inhibition of carbon steel in 1M HCl was investigated by gravimetric measurements. BIMGCS12-3 exhibited excellent protection for carbon steel in the low concentration 20mg L^-1 and the inhibition efficiency for corrosion decreased with increment of temperature.

Abstract: Cis-1,4poly-butadiene rubber (BR) is an unself-reinforce rubber. The tensile strength of BR is low. We study the factors that affect the capability of surface treatment attapugite/BR (OAT/BR). The factors include the kind of accelerant, the proportion of accelerant, the quantity of accelerant, the quantity of sulphur, etc. The result proves that the accelerant of CBS (CZ), TMTD, and TBBS (NS) can improve the capability of OAT/BR effectively. When the proportion of CZ and TMTD is 0.75 to 1.25, the quantity of accelerant is 3, the quantity of sulphur is 1.8, and the tensile strength of OAT/BR can reach 12.5MPa.

Abstract: The title introduced Anion anionic additive, character and application. Anionic additive can apply in paint, textile, coating, foam, plastic, etc. The structure of opal shale and the mechanism of release anion were discussed. The opal shale was comminuted by the airflow method. The average diameter of the opal shale granule was observed by granularity instrument. The result indicated that size is about 0.40-5.0μm. The printing poplin with high performance was achieved by intermingle technology and the generally printing means. The anion number (4000 ions /cm³) in printing poplin was measured.

Abstract: The main properties of tourmaline are far infrared radiation, spontaneous polarization, widely used in the fields of saving energy and environment. Tourmaline as catalyst have extensive applications in the fields of environmental protection, fuel combustion, air purification, printing, deodorant, antibacterial, as well as wastewater treatment of dyeing and aquaculture.

Abstract: By utilizing chrysotile asbestos tailing from Shannan ore in Sichuan as the main raw material, diopside-based glass-ceramics were successfully synthesized in the laboratory by adding some limestone, quartz sand, Al₂O₃, H₃BO₃, Na₂CO₃ and CaF₂. The optimum procedure for glass-ceramics was as follows: melting at 1400 for 60 min, sintering at 1100 for 120 min. Through the tests of physical and mechanical properties, the glass-ceramics materials with more crystalline phase had high density, fine performance of resisting compression (366MPa) and negligible water absorption. Through chemical resistance tests, the glass-ceramics samples showed strong corrosion resistance. Overall result indicated that it was a feasible attempt to produce glass-ceramics materials for building and decorative materials from chrysotile asbestos tailing.

Abstract: The effects of chitosan as the antimicrobial on Protein viscose fibers were studied in this research. Antimicrobial flame-retardant protein viscose fibers are more efficient compared with original flame-retardant protein viscose fiber in improving the limiting oxygen index (LOI) of fiber. The effectiveness of the microstructure was investigated using scanning electron microscope (SEM).SEM images showed that the antimicrobial finishing and the softener were made in a same bath, which might be due to the formation of a protective layer or cross linking effect.

Abstract: Phase pure Li₄Ti₅O₁₂/C composite was synthesized by solid-state method using Li₂CO₃ and anatase TiO₂ as starting materials, and glucose, citric acid and oxalic acid as carbon sources, respectively. The effects of different carbon sources and various glucose amounts on the microstructure and electrochemical properties were systematically investigated. The as-prepared samples were characterized by means of XRD, SEM and particle size analysis. The electrochemical properties were investigated in terms of constant-current charge/discharge cycling tests. The results showed that the Li₄Ti₅O₁₂/C composite with 2wt% glucose exhibited the optimal electrochemical performance with a specific discharge capacity of 190.8mAh/g at 0.2C rate. The discharge capacity could still reach 151.0mAh/g after 80 cycles at 1C rate, exhibiting excellent cycling performance.

Abstract: Microencapsulated phase change materials (microPCMs) contain paraffin was fabricated by in-situ polymerization using methanol-modified melamine-formaldehyde (MMF) as shell material. The shell of microPCMs was sooth and compact with global shape, its thickness was not greatly affected by the core/shell ratio and emulsion stirring rate. More shell material in microPCMs could enhance the thermal stability and provide higher compact condition for core material. After a 100-times thermal cycling treatment, the microPCMs contain paraffin also nearly did not change the phase change behaviors of PCM. With the increasing of weight contents of microPCMs in gypsum board, the thermal conductivity (λ) values of composites had decreased. The simulation of temperature tests proved that the microPCMs/gypsum composite could store the time-dependent and intermittent solar energy, which did not necessarily meet the energy needs for space heating at all times.

Abstract: During rubber processing, many factors can affect the mechanical properties of rubber composite. The influence of ambient temperature and content of titanate coupling agent and modified attapulgite (OAT) on mechanical properties were investigated by preparing rubber composites and measuring. The results showed that the rubber composite which was filled 40phr OAT modified by 3% titanate and prepared at the ambient temperature above 20 had best tensile strength (18.93MPa). There is a special phenomenon that the tensile strength had a rapid increase from 4.72MPa to 18.93MPa, when the content of OAT changed from 20 to 40phr in the experiment.