Mucus as an Arrested Phase Separation Gel

Mucus as an Arrested Phase Separation Gel
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粘液作为阻滞相分离凝胶

DOI:
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发表时间:
2017
期刊:
影响因子:
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通讯作者:
D. Larobina
D. Larobina
中科院分区:
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文献类型:
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作者:
A. Philippe;L. Cipelletti;D. Larobina

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我们研究了猪胃粘液凝胶的自发重组和老化行为相结合的流变学和非传统的静态和动态光散射。我们发现,随着时间的推移,粘液的弹性减弱,伴随着结构演变向局部更紧凑的配置和大规模的密度波动的发病。我们解释这一行为源于逮捕相分离,在许多凝胶形成聚合物系统中观察到的。空间和时间分辨的动态光散射数据证实了这种情况,表明凝胶重组是由于空间相关重排的间歇性爆发,导致弹道动力学。
We investigate the spontaneous restructuring and aging behavior of pig gastric mucus gels by combining rheology and nonconventional static and dynamic light scattering. We find that the mucus elasticity weakens over time, concomitantly to structural evolution toward a locally more compact configuration and the onset of large scale density fluctuations. We interpret this behavior as stemming from an arrested phase separation, as observed in many gel-forming polymer systems. This scenario is confirmed by space- and time-resolved dynamic light scattering data, showing that the gel restructuring is due to intermittent bursts of spatially correlated rearrangements, leading to ballistic dynamics.
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