Coupling of gelation and glass transition in a biphasic colloidal mixture-from gel-to-defective gel-to-glass
文献类型：期刊论文
| 作者 | Jia, Di1,2; Hollingsworth, Javoris V.5; Zhou, Zhi1,2; Cheng, He3,4; Han, Charles C.1 |
| 刊名 | SOFT MATTER
 |
| 出版日期 | 2015 |
| 卷号 | 11期号:45页码:8818-8826 |
| ISSN号 | 1744-683X |
| DOI | 10.1039/c5sm01531f |
| 英文摘要 | The state transition from gel to glass is studied in a biphasic mixture of polystyrene core/poly(N-isopropylacrylamide) shell (CS) microgels and sulfonated polystyrene (PSS) particles. At 35 degrees C, the interaction between CS microgels is due to short-range van der Waals attraction, while that between PSS particles is from long-range electrostatic repulsion. During the variation of the relative ratio of the two species at a fixed apparent total volume fraction, the mixture exhibits a gel-to-defective gel-to-glass transition. When small amounts of PSS are introduced into the CS gel network, some of them are kinetically trapped, causing a change in its fractal structure, and act as defects to weaken the macroscopic gel strength. An increase of the PSS content in the mixture promotes the switch from the gel to the defective gel, e.g., the typical two-step yielding gel merges into one-step yielding. This phenomenon is an indication that inter-cluster bond breakage coincides with intra-cluster bond fracture. As the relative volume fraction of PSS exceeds a critical threshold, the gel network can no longer be formed; hence, the mixture exhibits characteristics of glass. A state diagram of the biphasic mixture is constructed, and the landscapes of the different transitions will be described in future studies. |
| 语种 | 英语 |
| WOS记录号 | WOS:000364922200010 |
| 出版者 | ROYAL SOC CHEMISTRY |
| 源URL | [http://ir.iccas.ac.cn/handle/121111/44927]  |
| 专题 | 中国科学院化学研究所 |
| 通讯作者 | Cheng, He |
| 作者单位 | 1.Chinese Acad Sci, Beijing Natl Lab Mol Sci, Joint Lab Polymer Sci & Mat, State Key Lab Polymer Phys & Chem,Inst Chem, Beijing 100190, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Chinese Acad Sci, IHEP, CSNS, Dongguan 523803, Peoples R China 4.DINS, Dongguan 523808, Peoples R China 5.Univ St Thomas, Dept Chem & Phys, Houston, TX 77006 USA |
| 推荐引用方式 GB/T 7714 | Jia, Di,Hollingsworth, Javoris V.,Zhou, Zhi,et al. Coupling of gelation and glass transition in a biphasic colloidal mixture-from gel-to-defective gel-to-glass[J]. SOFT MATTER,2015,11(45):8818-8826. |
| APA | Jia, Di,Hollingsworth, Javoris V.,Zhou, Zhi,Cheng, He,&Han, Charles C..(2015).Coupling of gelation and glass transition in a biphasic colloidal mixture-from gel-to-defective gel-to-glass.SOFT MATTER,11(45),8818-8826. |
| MLA | Jia, Di,et al."Coupling of gelation and glass transition in a biphasic colloidal mixture-from gel-to-defective gel-to-glass".SOFT MATTER 11.45(2015):8818-8826. |
入库方式： OAI收割
来源：化学研究所
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