本文選題：Patchy膠體粒子 + 相圖�。� 參考：《高等學�；瘜W學報》2017年10期

【摘要】：根據(jù)熱力學微擾理論研究了Aa型Patchy膠體的相態(tài)結(jié)構(gòu),考察了Patch之間的締合強度及Patch數(shù)目對體系相態(tài)結(jié)構(gòu)的調(diào)控機制.利用相平衡原理給出了Patchy膠體的流體、玻璃態(tài)固體和面心立方晶體之間轉(zhuǎn)變及溶膠-凝膠轉(zhuǎn)變的相圖,討論了玻璃態(tài)和晶態(tài)固相的成核機制、臨界現(xiàn)象和相變問題.研究結(jié)果表明,Patchy膠體粒子之間的締合作用和Patch數(shù)目可以顯著地調(diào)控體系的三相點、臨界溫度和臨界密度等特征.在高溫條件下,Patchy膠體以一次成核方式結(jié)晶;而在低溫條件下則以兩步成核方式逐步成核結(jié)晶,中間經(jīng)過非晶態(tài)的玻璃態(tài)固相作為過渡.說明Patchy粒子之間的締合作用對其相態(tài)結(jié)構(gòu)具有決定性影響,因而成為調(diào)控體系聚集態(tài)結(jié)構(gòu)的重要因素.
[Abstract]:Based on the thermodynamic perturbation theory, the phase structure of a type Patchy colloid was studied, and the association strength between Patch and the regulation mechanism of Patch number on the phase structure of the system were investigated. Based on the phase equilibrium principle, the phase diagrams of the transition between Patchy colloid fluid, glass state solid and face-centered cubic crystal and sol-gel transition are given. The nucleation mechanism, critical phenomena and phase transition of glass and crystalline solid phase are discussed. The results show that the association between the colloidal particles and the number of Patch can significantly regulate the characteristics of the three-phase point, critical temperature and critical density of the system. At high temperature, Patchy colloid crystallizes in a single nucleation mode, while at low temperature, it is nucleated in a two-step nucleation mode, with the transition of amorphous glass solid phase in the middle. It is shown that the association between Patchy particles has a decisive effect on the structure of the phase state, and thus becomes an important factor in the structure of the aggregate state of the system.
【作者單位】： 河北大學化學與環(huán)境科學學院;河北農(nóng)業(yè)大學理學院;河北大學河北省化學生物學重點實驗室;
【基金】：國家自然科學基金(批準號:21374028,21306034) 河北省自然科學基金(批準號:B2014201103) 河北省高層次人才資助項目(批準號:A2016015001) 河北省青年拔尖人才項目 河北省普通高校青年拔尖人才計劃項目(批準號:BJ2017017)資助~~
【分類號】：O648.11

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1 王海軍;洪曉鐘;顧芳;巴信武;;Patchy粒子聚集的統(tǒng)計熱力學[A];中國化學會第28屆學術(shù)年會第15分會場摘要集[C];2012年

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本文編號：2061638