本文選題：碳材料　切入點(diǎn)：茴香醚　出處：《化工學(xué)報(bào)》2017年12期

【摘要】：選擇葡萄糖為碳源制備了一種多孔碳材料,對(duì)材料進(jìn)行孔隙結(jié)構(gòu)表征,研究材料孔隙結(jié)構(gòu)對(duì)茴香醚脫附擴(kuò)散機(jī)制的影響。應(yīng)用重量法測(cè)定茴香醚在不同吸附劑上的脫附動(dòng)力學(xué)曲線,建立擴(kuò)散系數(shù)De估算模型,然后計(jì)算出茴香醚在吸附劑上的擴(kuò)散系數(shù)De(t)-q(t)關(guān)系曲線,根據(jù)擴(kuò)散系數(shù)值的大小劃分?jǐn)U散機(jī)理區(qū)域,討論吸附劑的孔隙結(jié)構(gòu)對(duì)茴香醚在吸附劑材料上擴(kuò)散機(jī)制的影響。研究結(jié)果表明,所制備樣品的比表面積可達(dá)1133~3153 m2·g-1,茴香醚在吸附劑上的吸附量可達(dá)到1050 mg·g-1;茴香醚香料分子在3種材料上的脫附擴(kuò)散都經(jīng)歷了一般擴(kuò)散、Knudsen擴(kuò)散和表面擴(kuò)散。吸附劑的孔隙結(jié)構(gòu)對(duì)茴香醚香料分子在材料上的脫附擴(kuò)散機(jī)制有影響,其微孔比例越高,茴香醚分子在此吸附劑上以表面擴(kuò)散機(jī)制進(jìn)行脫附所占比例越高。茴香醚分子在3種吸附劑上的脫附均以Knudsen擴(kuò)散和表面擴(kuò)散為主,約占78%~83%。本研究成果對(duì)于指導(dǎo)香料物質(zhì)緩釋材料的制備具有實(shí)際指導(dǎo)和借鑒意義。
[Abstract]:A porous carbon material was prepared by using glucose as carbon source. The pore structure of the material was characterized and the effect of pore structure on the desorption and diffusion mechanism of anisole was studied.The desorption kinetic curves of anisole on different adsorbents were measured by gravimetric method, and the diffusion coefficient de estimation model was established, and then the diffusion coefficient of anisole on the adsorbent was calculated.The influence of pore structure of adsorbent on diffusion mechanism of anisole on adsorbent material was discussed according to the value of diffusion coefficient.The results show that the specific surface area of the prepared samples can reach 1133 ~ 3153 m ~ (-2) g ~ (-1), the adsorption capacity of anisole on the adsorbent is 1050 mg / g ~ (-1), and the desorption diffusion of anisole on the three materials has experienced general diffusion Knudsen diffusion and surface diffusion.The pore structure of the adsorbent has an effect on the desorption and diffusion mechanism of anisole flavor molecules on the materials. The higher the micropore ratio, the higher the desorption rate of anisole molecules on the adsorbent by surface diffusion mechanism.The desorption of anisole on the three adsorbents was mainly composed of Knudsen diffusion and surface diffusion, accounting for 78% 833%.The results of this study have practical guidance and reference significance for the preparation of sustained-release spice materials.
【作者單位】： 華南理工大學(xué)化學(xué)與化工學(xué)院;云南中煙工業(yè)有限責(zé)任公司技術(shù)中心;廣州華芳煙用香精有限公司;
【基金】：煙草行業(yè)卷煙調(diào)香技術(shù)重點(diǎn)實(shí)驗(yàn)室開(kāi)放課題基金項(xiàng)目(TX2014007)~~
【分類(lèi)號(hào)】：O647.3;TQ651

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