Preparation and morphology of different types of cellulose spherulites from concentrated cellulose ionic liquid solutions
文献类型：期刊论文
| 作者 | Song, Hongzan1,2; Niu, Yanhua2; Yu, Jian2; Zhang, Jun2; Wang, Zhigang2,3; He, Jiasong2 |
| 刊名 | SOFT MATTER
 |
| 出版日期 | 2013 |
| 卷号 | 9期号:11页码:3013-3020 |
| ISSN号 | 1744-683X |
| DOI | 10.1039/c3sm27320b |
| 英文摘要 | Spherulites of microcrystalline cellulose (MCC) have been prepared by using the vapor precipitation procedure with proper humidity at various temperatures from concentrated microcrystalline cellulose/1-allyl-3-methylimidazolium chloride (MCC/AMIMCl) solutions, for which AMIMCl is an ionic liquid, a good solvent for dissolving MCC. Four different types of MCC spherulites have been investigated by using polarizing optical microscopy (POM), scanning electron microscopy (SEM) and wide-angle X-ray diffraction (WAXD) technique. POM observations reveal four types of MCC spherulites, i.e., negative and positive banded spherulites, and negative and positive non-banded spherulites, depending on MCC concentration and crystallization temperature (T-c). For banded spherulites, both the band spacing and sizes of spherulites evidently increase with increasing T-c for each MCC/AMIMCl solution. The sizes of spherulites increase with increasing MCC concentration at a given T-c. The findings imply that MCC concentration plays a key role in MCC chain reorganizations into positive or negative spherulites, while the crystallization temperature mainly affects the MCC crystalline lamellar twisting for the formation of banded spherulites. SEM observation reveals that the formation of negative and positive banded spherulites is due to different lamellar twisting directions and the formation of non-banded spherulites is due to the formed radiating fibrillar textures. WAXD profiles confirm that all the four types of MCC spherulites formed are in the crystalline form of cellulose II family, exhibiting more intense and sharper diffraction peaks than those of cellulose II family obtained by the dissolution/precipitation process. |
| 语种 | 英语 |
| WOS记录号 | WOS:000315168300005 |
| 出版者 | ROYAL SOC CHEMISTRY |
| 源URL | [http://ir.iccas.ac.cn/handle/121111/42099]  |
| 专题 | 中国科学院化学研究所 |
| 通讯作者 | Zhang, Jun |
| 作者单位 | 1.Hebei Univ, Coll Chem & Environm Sci, Baoding 071002, Hebei Province, Peoples R China 2.Chinese Acad Sci, Inst Chem, CAS Key Lab Engn Plast, Beijing Natl Lab Mol Sci, Beijing 100190, Peoples R China 3.Univ Sci & Technol China, Hefei Natl Lab Phys Sci Microscale, Dept Polymer Sci & Engn, CAS Key Lab Soft Matter Chem, Hefei 230026, Anhui, Peoples R China |
| 推荐引用方式 GB/T 7714 | Song, Hongzan,Niu, Yanhua,Yu, Jian,et al. Preparation and morphology of different types of cellulose spherulites from concentrated cellulose ionic liquid solutions[J]. SOFT MATTER,2013,9(11):3013-3020. |
| APA | Song, Hongzan,Niu, Yanhua,Yu, Jian,Zhang, Jun,Wang, Zhigang,&He, Jiasong.(2013).Preparation and morphology of different types of cellulose spherulites from concentrated cellulose ionic liquid solutions.SOFT MATTER,9(11),3013-3020. |
| MLA | Song, Hongzan,et al."Preparation and morphology of different types of cellulose spherulites from concentrated cellulose ionic liquid solutions".SOFT MATTER 9.11(2013):3013-3020. |
入库方式： OAI收割
来源：化学研究所
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