以濕式化學法自炭材中分離出石墨烯氧化物之研究

Study on the Separation of Graphene Oxides from Carbon Materials by Wet Chemical Method

蔡伯達(Tsai Po Da)

指導教授 ： 黃武章 ； 張國慶

國立屏東科技大學/工學院/環境工程與科學系所/碩士(2013年)

https://doi.org/10.6346/NPUST.2013.00283

摘要

藉著本實驗室先前研究成果得知，可由廢棄生質物製備於炭材後，再經由熱處理應生成石墨微晶，接著以X-ray繞射光譜可測出炭材中的石墨比例含量，本實驗研究目的以人工合成炭，經由濕式化學法製備石墨烯氧化物之研究探討，以濕式化學法萃取炭材中的石墨微晶於氧化溶劑裡，即形成進行石墨烯氧化物溶液，再以石墨烯氧化溶液製備再利用產品，如：散熱薄膜、抗靜電添加材，增加應用於廢棄生質物的價值。
實驗結果得知以兩種市售人工合成炭(BCT及BCG)進行濕式化學法製備石墨烯氧化物是可行性的，該炭材藉由鍛燒精煉後有一石墨烯含量，藉著不同條件探討分析了解整體實驗結果，分別為X光繞射分析儀得知整體的樣品訊號之可行性；傅立葉紅外線光譜儀試驗說明石墨的氧化機制建立於炭材中的-CH2、-CH3、-OH鍵的相關性，及掃描式電子顯微鏡了解不同炭材結晶成石墨烯氧化物薄膜時，該石墨微晶溶解之結晶態不同，再者從紫外光可見光分光光譜儀了解石墨烯氧化物在製備過程中，石墨微晶的發色團(苯環、C=O等官能基)，能觀察發色團的訊號，本實驗濕式化學炭特性分析結果得知， BCT人工合成炭較適合製備石墨烯氧化物，中性溶劑為丙酮較為適合，即不同配比、時間試驗結果得知BCT的氧化效果較為充足、穩定性，最後在產品應用的實驗結果顯示，藉由添加該溶液製備導熱、抗靜電材料，結果發現在散熱部分，B白膠與BCTGO添加1:1的配比有明顯的總降溫值：33℃/hr，比市售散熱膜效果多出9℃/hr，另外在抗靜電材料部分，結果顯示未添加石墨烯氧化物溶液之薄膜，電阻皆偏高，電阻約14至19萬左右，比較有添加之樣品的電阻，相對電阻偏向4萬至8萬左右，可以藉著不同的配比去調整所需的電阻，進行製備抗靜材料之應用性，有一提高效益之成果，表示藉著添加該材進入膠體有一可行性產品發展。

關鍵字：炭材、石墨、石墨烯氧化物、導熱材料、抗靜電材料。

關鍵字

炭材 ； 石墨 ； 石墨烯氧化物 ； 導熱材料 ； 抗靜電材料

並列摘要

Our previous researches have attempted to measure the graphite micro-crystals content in carbon by thermal-treated woody biomass wastes, through X-ray diffraction spectrometry.
The purpose of this study was to separate graphite micro-crystals into graphene oxides from two commercial carbon materials (BCT and BCG) through the wet chemical method. The method consists of using oxygenated solvents to extract graphite crystallites from carbon to form a graphene oxide solution, and then to apply graphene oxide solution products such as: heat dissipation film and antistatic materials. This was done to increase the value of using waste biomass substances.
The x-ray diffraction spectrometer was used to understand the content of graphite micro-crystals in carbon materials. Fourier transform infrared spectrometer was used to illustrate the functional groups of graphite carbon material created in between the oxidation mechanism. The scanning electron microscope was used to understand the different graphite crystalline state in films formed from graphene oxide solutions. Finally, ultraviolet-visible spectrophotometer was used to determine the change of chromospheres (benzene, C=O functional groups) of graphene oxide solutions during the preparation process. The experimental results indicated that BCT is more suitable for the preparation of graphene oxide solution.
The graphene oxide solution was applied to prepare the heat dissipation and antistatic products. In heat dissipation test , when the B resin and BCT graphene oxide solution was mixed with a ratio of 1:1 had a significant heat dissipation value: 33 ℃ / hr, than the commercial films heat dissipation which was at 9 ℃ / hr. In antistatic test, the resistance is measured as 140,000 ~ 190,000 Ω without addition of BCT graphene oxide solution, while the resistance is about 40,000 ~ 80,000 Ω after adding of BCT graphene oxide solution. Different ratios can be adjusted to the required resistance, which can be applied for the preparation of anti-static material. This experiment indicated that the material has diverse applications.

Keywords: carbon, graphite, graphene oxide, heat dissipating material, antistatic material.

並列關鍵字

carbon ； graphite ； graphene oxide ； heat dissipating material ； antistatic material

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