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| Changes of Structure and Morphological Characteristics of Cellulose during Preparation of Microcrystalline Cellulose |
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| DOI：10.11980/j.issn.0254-508X.2016.06.006 |
| Key Words:hydrocellulose selectivity crystallinity morphology crystalline region amorphous region |
| Fund Project:教育部高校博士点专项基金(20126125130001)；陕西科技大学博士启动基金(BJ13-02)；陕西省大学生创新创业训练计划项目(1189)。 |
| Author Name | Affiliation | | 张美云 | 陕西科技大学轻工与能源学院,陕西省造纸技术及特种纸品开发重点实验室,陕西西安,710021 | | 强丹丹* | 陕西科技大学轻工与能源学院,陕西省造纸技术及特种纸品开发重点实验室,陕西西安,710021 | | 李金宝 | 陕西科技大学轻工与能源学院,陕西省造纸技术及特种纸品开发重点实验室,陕西西安,710021 | | 吴修莉 | 陕西科技大学轻工与能源学院,陕西省造纸技术及特种纸品开发重点实验室,陕西西安,710021 |
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| Abstract:The supramolecular structure of cellulose is consisted of the crystalline region and amorphous region, the molecular chains of the former are well-regulated, while that of the latter are ruleless. Based on the study of the properties of cellulose degraded by HCl in different reaction time stages (20～120 min), under the constant condition of HCl concentration 2.5 mol/L, reaction temperature 80℃, solid-to-liquid ratio 1∶15, rotating speed 120 r/min, the optimal reaction time was 60 min for selective hydrolysis of cellulose. The results showed that the yield of hydrocellulose could reach to 96.04%, its polymerization degree and crystallinity charged from 661 and 58.92% before hydrolysis to 99 and 76.01%, respectively, under the optimal reaction time of 60 min. Furthermore, the average length of fibers and fines were 288 μm, 59 μm, respectively, and the fines content reached to 90.13%. |
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