vgcf 中文意思是什麼

vgcf 解釋
氣相生長碳纖維
  1. This dissertation focuses on how to develop a high performance damping mechanism based on multi - energy transitions, which is independent or little dependant with the viscoelasticity of polymer matrix. three sections are mainly included in this dissertation as follows : chlorinated polyethylene ( cpe ) / piezoelectric ceramic ( pzt ) / vapor grown carbon fiber ( vgcf ) composites ; cpe / 2, 2 ' - methylene - bis - ( 4 - methyl - 6 - cyclohexylphenol ) ( zkf ) / vgcf composites ; organic hybrids made from cpe and small molecules cpe / pzt / vgcf composites : the damping composites of multi - energy transitions mechanism were produced by mixing pzt and vgcf into cpe. in this system, the mechanical vibration energy that was transmitted to cpe was found to convert into joule ' s heat through conduction paths between vgcf in the polymer matrix, so the vibration fades away

    本論文主要包括三個方面的研究內容： ?氯化聚乙烯（ cpe ） /壓電陶瓷（ pzt ） /氣相生長碳纖維（ vgcf ）復合材料； ? cpe /雙[ （ 2 -羥基- 3 -環己基- 5 -甲基） -苯基]甲烷（ zkf ） / vgcf復合材料； ? cpe基有機小分子混雜型復合材料cpe / pzt / vgcf減振復合材料：利用壓電和導電填料填充高聚物基體，當復合材料受到機械振動時，通過高聚物基體將機械振動能傳遞到壓電陶瓷粒子上，利用壓電陶瓷的壓電效應，將機械能轉換成電能，則電流在導電粒子產生的迴路中流動，由於導電迴路具有一定的電阻，所以電能又轉變成熱能耗散掉，從而起到減振的目的。
  2. In this section, a small organic molecule is applied to instead of pzt with the purpose to avoid the rigidity difference between cpe and pzt. ( 1 ) there is no plateau area in the conductivity curve of cpe / pzt / vgcf composite, which is due to the molecular level blending of cpe and zkf in molten condition during the preparation of cpe / zkf / vgcf composites, further verifying that pzt is conducive to the formation of conductive loop

    通過對cpe / zkf / vgcf復合材料的分析探討得出: （ 1 ） cpe / zkf腳gcf復合材料的導電曲線上並不存在類似cpe / pzt渾gcf復合材料的半導區平臺，這是由於cpe億kf / vgcf復合材料的制備是在cpe和zkf熔融的狀態下的分子水平的共混，進一步證明了pzt對導電迴路形成的雙重作用;同時，由於zkf對vgcf的包覆作用，使cpe億kf那gcf復合材料導電臨界值較高。
  3. ( 2 ) the damping mechanism of multi - energy transitions takes effect when the vgcf content is among the semi - conductive area. when the vgcf content is low ( below 8 % ), the vgcf conductive circuit does not form and the heat loss is quite little. when the vgcf content is higher than 20 %, the transition efficiency between electric energy and heat is limited

    這是由於當vgcf含量太少時（低於8 ） ，復合材料中導電網路還沒有來得及形成，起不到能量損耗的目的；而當vgcf含量太高時（高於20 ） ，電導率太高，復合材料成為電的良導體，電能與熱能之間的轉換效率很低，能量損耗也不高。
  4. The existence of pzt has bi - directional effects on the conductive circuit of vgcf, which leads to an evident semi - conducitve plateau area in the electrical conductive curve

    由於pzt的存在對vgcf導電網路的形成具有雙重的作用，這反映到電導率隨vgcf體積分數的變化曲線上，則是在半導區存在一個明顯的半導區平臺。
  5. In this section, conclusions are made as follows : ( 1 ) with the increase of vgcf content, the cpe / pzt / vgcf composite represents insulator, semiconductor and conductor

    通過對cpe / pzt / vgcf復合材料的導電性能和粘彈性能的研究發現： （ 1 ）隨著vgcf體積分數的增加， cpe / pzt / vgcf復合材料呈現由絕緣材料到半導體、導體材料的導電特性。
  6. When vgcf volume content is low in cpe / pzt / vgcf composite, the existence of pzt can improve the vgcf distribution in cpe matrix, but the existence of pzt blocks the networks of vgcf when vgcf content is high

    （ 2 ）通過對cpe / pzt / vgcf復合材料動態機械性能的測試結果表明， vgcf的體積分數當處於半導區時具有更為顯著的壓電導電減振作用效果。
  7. ( 4 ) only when the resistance r = l / c, the transition efficiency between electric energy and heat reach its maximum value, which makes it possible to design the high performance damping composites of multi - energy transitions by adjusting the vgcf content. cpe / zkf / vgcf composites : in the cpe / pzt / vgcf composites, the conversion efficiency from force to electricity is very low because of the obvious difference of rigidity between cpe and pzt, which leads to the damping effect of multi - energy transitions is not so evident as the viscoelasticity of the matrix cpe, especially during the cpe glass transition

    Cpe / zkf那gcf復合材料:針對cpe / pzt / vgcf復合材料中由於cpe和pzt之間模量差異較大，導致cpe和pzt之間的應力傳遞欠佳，影響力一電變換效率，從而壓電導電減振作用效果並不十分顯著的現象;本章中採用極性有機小分子雙（ 2一輕基- 3一環己基一5一甲基）一苯基]甲烷（ zkf ） ，而不採用pzt ，消除了pzt與cpe模量方面差異的影響。
  8. The damping behavior of the multi - energy transitions mechanism is obvious only when the vgcf content is among semi - conductive area. ( 3 ) the cpe / pzt / vgcf composites can be presumed as a circuit composed of a resistance and a capacitor, which can successfully explain the phenomenon that multi - energy transitions mechanism takes effect only in the vgcf semi - conductive area

    博士論文:基於多重能量轉換的高性能減振材料的研究（ 3 ）可以將cpe / pzt / vgcf復合材料設計成一個包含電阻和電容的等效迴路，這樣可以很好的解釋在vgcf的半導區間內，復合材料具有較高的電導率時復合材料的壓電導電減振作用更為明顯。
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