当前位置：
X-MOL 学术
›
ACS Appl. Mater. Interfaces
›
论文详情
Our official English website, www.x-mol.net, welcomes your
feedback! (Note: you will need to create a separate account there.)
Sulfolane Crystal Templating: A One-Step and Tunable Polarity Approach for Self-Assembled Super-Macroporous Hydrophobic Monoliths
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2022-09-28 , DOI: 10.1021/acsami.2c11930 Chunjie Liu 1 , Dong Wang 1 , Zimeng Wang 1 , Haiyan Zhang 1 , Liang Chen 1 , Zhong Wei 1
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2022-09-28 , DOI: 10.1021/acsami.2c11930 Chunjie Liu 1 , Dong Wang 1 , Zimeng Wang 1 , Haiyan Zhang 1 , Liang Chen 1 , Zhong Wei 1
Affiliation
|
Freeze-casting (ice templating) is generally used to prepare super-macroporous materials. However, water solubility limits the application of freeze-casting in hydrophobic material fabrication. In the present work, inexpensive and low-toxic sulfolane was used as a novel crystallization-induced porogen (sulfolane crystal templating) to prepare super-macroporous hydrophobic monoliths (cryogels) with tunable polarity. The phase transition of sulfolane consisted of reversible processes in the liquid, semi-crystalline, and crystalline states. Because of the density change during phase transition, liquid sulfolane experienced a 16.4% volume shrinkage per unit mass. Thus, the cryogels obtained using the conventional freezing method contained obvious hollow-shaped defects. Furthermore, a novel route of pre-cooling, pre-crystallization, crystal growth, freezing, and thawing (PPCFT) was employed to prepare cryogels with defect-free macroscopic morphology and uniform pore structure. The as-obtained cryogels were composed of a super-macroporous structures and interconnected channels, and their porosity ranged between 85 and 97%. Moreover, the cryogels manifested good hydrophobicity (contact angle = 120–130°) and had absorption capacities greater than 10 g g–1 for oils and organic liquids. The maximum absorption capacities of the resultant cryogels in dichloromethane, ethyl acetate, and liquid paraffin were 60.3, 35.8, and 15.2 g g–1, respectively. Moreover, sulfolane could conveniently dissolve hydrophobic and hydrophilic monomers to generate amphiphilic cryogels (contact angle = 130–0°). Therefore, sulfolane crystal templating is a potential fabrication method for super-macroporous hydrophobic materials with tunable polarity.
中文翻译：
环丁砜晶体模板：自组装超大孔疏水整体的一步可调极性方法
冻铸（冰模板）一般用于制备超大孔材料。然而，水溶性限制了冷冻浇铸在疏水材料制造中的应用。在目前的工作中，廉价和低毒的环丁砜被用作一种新型的结晶诱导致孔剂（环丁砜晶体模板）来制备具有可调极性的超大孔疏水整体（冷冻凝胶）。环丁砜的相变由液态、半晶态和晶态的可逆过程组成。由于相变期间的密度变化，液体环丁砜每单位质量经历了 16.4% 的体积收缩。因此，使用常规冷冻方法获得的冷冻凝胶含有明显的空心状缺陷。此外，一种新的预冷、预结晶、晶体生长途径，采用冷冻和解冻（PPCFT）制备具有无缺陷宏观形态和均匀孔结构的冷冻凝胶。所获得的冷冻凝胶由超大孔结构和相互连接的通道组成，其孔隙率在85%到97%之间。此外，冷冻凝胶表现出良好的疏水性（接触角= 120-130°）并且吸收能力大于10 gg–1用于油和有机液体。所得冷冻凝胶在二氯甲烷、乙酸乙酯和液体石蜡中的最大吸收容量分别为 60.3、35.8 和 15.2 gg –1。此外，环丁砜可以方便地溶解疏水和亲水单体以产生两亲冷冻凝胶（接触角 = 130-0°）。因此，环丁砜晶体模板是制备极性可调的超大孔疏水材料的一种潜在方法。
更新日期：2022-09-28
中文翻译：
环丁砜晶体模板：自组装超大孔疏水整体的一步可调极性方法
冻铸（冰模板）一般用于制备超大孔材料。然而，水溶性限制了冷冻浇铸在疏水材料制造中的应用。在目前的工作中，廉价和低毒的环丁砜被用作一种新型的结晶诱导致孔剂（环丁砜晶体模板）来制备具有可调极性的超大孔疏水整体（冷冻凝胶）。环丁砜的相变由液态、半晶态和晶态的可逆过程组成。由于相变期间的密度变化，液体环丁砜每单位质量经历了 16.4% 的体积收缩。因此，使用常规冷冻方法获得的冷冻凝胶含有明显的空心状缺陷。此外，一种新的预冷、预结晶、晶体生长途径，采用冷冻和解冻（PPCFT）制备具有无缺陷宏观形态和均匀孔结构的冷冻凝胶。所获得的冷冻凝胶由超大孔结构和相互连接的通道组成，其孔隙率在85%到97%之间。此外，冷冻凝胶表现出良好的疏水性（接触角= 120-130°）并且吸收能力大于10 gg–1用于油和有机液体。所得冷冻凝胶在二氯甲烷、乙酸乙酯和液体石蜡中的最大吸收容量分别为 60.3、35.8 和 15.2 gg –1。此外，环丁砜可以方便地溶解疏水和亲水单体以产生两亲冷冻凝胶（接触角 = 130-0°）。因此，环丁砜晶体模板是制备极性可调的超大孔疏水材料的一种潜在方法。
京公网安备 11010802027423号