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RISS 인기검색어
- 검색키워드
- 저자 : Shaobo Pan (검색결과 3 건)
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HIROKI NANKO,MICHELYN MCNEAL,SHAOBO PAN 한국펄프·종이공학회 2006 한국펄프종이학회 기타 간행물 Vol.- No.-
A novel transmission electron microscopy technique for the visualization of polymers adsorbed on secondary fines has been developed. This technique has been utilized in observing the adsorption behavior of various wet-end additives. The technique is sensitive enough not only to allow differentiation between linear and branched polymers, but also to observe differences in the adsorption behavior and conformational characteristics of particular polymeric derivatives. Conformational changes of a cationic polyacrylamide (CPAM) were examined in response to variations in wet-end conditions, such as mixing time and system conductivity. The molecular conformations of cationic starch and cationic guar gum were also examined by this technique. The technique has been employed to observe the effects of silica microparticles on the conformational characteristics of CPAM (drainage/retention aid) pre-adsorbed on secondary fines. The transmission electron microscopy method is a viable tool for investigating the macromolecular events that make up a large part of wet end chemistry in papermaking.
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Zhong-Wei Wu,Shaobo Pan,Guang-Fu Liu,Shou-Xu Song 한국정밀공학회 2014 International Journal of Precision Engineering and Vol. No.
In view of the present situation that the recovery of waste thermosetting plastics and products is difficult and the utilization rate islow, regeneration mechanism, regeneration methods and recycling process of waste thermosetting plastics under mechanical thermalcoupling fields are proposed. Regeneration powders of Thermosetting Phenolic plastic are obtained by mechanochemical activatedregeneration methods, the molecular structure, properties and crosslink density of phenol regeneration materials are analyzed. Analysis results show that network crosslinked molecular structure was destroyed, reactive groups produced and the crosslink densitydecreased. The activity of regeneration powders was reinforced and its plasticity was also improving, so the utilization rate wasimproved. Regeneration composite plastics were manufactured by hot press molding or extrusion compression molding. Themicrostructure of regeneration composite plastics was analyzed, and its mechanical strength was tested. Results showed that thetensile strength and bending strength of samples (weight ratio ≥ 50%) respectively exceed 15.88 MPa and 33.49 MPa. At last processparameters for regeneration effects were discussed, and these parameters were optimized. When particle size was 80 mesh (size ≤ 0.18mm), quality proportion was 50~70%, pressure was 10Mpa, heating temperature was 180~190oC, the optimal effects for regeneratedcomposite were achieved.
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Design Method of Active Disassembly Structure Triggered by Temperature-Pressure Coupling
Zhifeng Liu,Yifei Zhan,Huanbo Cheng,Xinyu Li,Shaobo Pan 한국정밀공학회 2013 International Journal of Precision Engineering and Vol. No.
Active disassembly products often use active disassembly structures triggered by single temperature or pressure field as reversible joints. These structures can be triggered automatically in extreme or accidental circumstances, thus causing the low reliability of products. For improving the reliability of active disassembly products, working mechanisms of active disassembly structure triggered by temperature-pressure coupling is presented in this article. Through analyzing some typical active disassembly structures, this article presents the design criteria and methods of active disassembly structure triggered by temperature-pressure coupling. The feasibility of these design methods is proved by a case analysis. The results of research shows that the reliability of active disassembly structures triggered by temperature-pressure coupling is improved greatly, which can lay the foundation for the industrial applications of active disassembly methods.
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