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1. Sandpaper as template for a robust superhydrophobic surface with self-cleaning and anti-snow/icing performances

Author:
Qing, Yongquan; Long, Cai; An, Kai; Hu, Chuanbo; Liu, Changsheng
Source:
Journal of colloid and interface science 2019 v.548 pp. 224-232
ISSN:
0021-9797
Subject:
hydrophobicity,   etc   ; abrasives; infrastructure; medicine;     Show all 4 Subjects
Abstract:
... Superhydrophobic surfaces have important applications in various fields. However, the development of artificial superhydrophobic surfaces for large scale applications is hindered by their poor mechanical and chemical robustness. In this study, a simple, inexpensive, and scalable strategy was reported to create a versatile superhydrophobic surface that used sandpaper as a template to lock-in the fl ...
DOI:
10.1016/j.jcis.2019.04.040

2. Synthesis and controllable self-assembly of 3D amphiphilic organoplatinum(ii) metallacages in water

Author:
WangThese authors contributed equally to this work., Yang; Wang, Chenwei; Long, Renhua; Cao, Yufeng; Fan, Dongli; Cen, Moupan; Cao, Leyu; Chen, Yanmei; Yao, Yong
Source:
Chemical communications 2019 v.55 no.35 pp. 5167-5170
ISSN:
1364-548X
Subject:
hydrophobicity,   etc   ; chemical reactions; hydrophilicity;     Show all 3 Subjects
Abstract:
... An amphiphilic metallacage with tetragonal prismatic frameworks as a hydrophobic core and pendent tri(ethylene glycol) chains as hydrophilic tails was prepared successfully and showed controllable self-assembly behaviour in water. ...
DOI:
10.1039/c9cc02173f

3. Lateral motion of a droplet after impacting on groove-patterned superhydrophobic surfaces

Author:
Wang, Yuxiang; Jian, Meipeng; Zhang, Xiwang
Source:
Colloids and surfaces 2019 v.570 pp. 48-54
ISSN:
0927-7757
Subject:
hydrophobicity,   etc   ; coatings; droplets; momentum; wettability;     Show all 5 Subjects
Abstract:
... The lateral motion of a droplet after its impact on groove-patterned superhydrophobic surfaces is numerically studied in the present work. Different from previous studies, the wettability gradient is not required to produce lateral motions. Instead, a substrate with two halves decorated with same Cassie area fractions but different length ratios is used and four different motions can be observed b ...
DOI:
10.1016/j.colsurfa.2019.03.013

4. Depinning force of a receding droplet on pillared superhydrophobic surfaces: Analytical models

Author:
Sarshar, Mohammad Amin; Jiang, Youhua; Xu, Wei; Choi, Chang-Hwan
Source:
Journal of colloid and interface science 2019 v.543 pp. 122-129
ISSN:
0021-9797
Subject:
hydrophobicity,   etc   ; droplets; energy; evaporation; models;     Show all 5 Subjects
Abstract:
... It was experimentally shown that a depinning force of a receding droplet on a micropillared superhydrophobic surface has an apparently linear correlation with the maximal three-phase contact line attainable along an actual droplet boundary. However, the experimental observation has not yet been supported by any theoretical basis or analysis. This study establishes an analytical model that theoreti ...
DOI:
10.1016/j.jcis.2019.02.042

5. A study of synthesizing stable super-slip carbon nanotubes by grafting octadecylamine

Author:
Yang, Jun; Song, Haojie; Guo, Zhiguang
Source:
Journal of colloid and interface science 2019 v.540 pp. 126-133
ISSN:
0021-9797
Subject:
hydrophobicity,   etc   ; acidification; carbon nanotubes; moieties;     Show all 4 Subjects
Abstract:
... A stable super-slip material with the electrical conductive property has been synthesized by chemical grafting. The multi-walled carbon nanotubes (MWCNTs) were chosen as the electrical conductive matrix. After the acidification of the mixed acid, the original MWCNTs were oxidized to form carboxyl groups on the surface. The octadecylamine (ODA) was bonded on the acidified MWCNTs with the amidation ...
DOI:
10.1016/j.jcis.2019.01.015

6. Correction: A robust and flexible bulk superhydrophobic material from silicone rubber/silica gel prepared by thiol–ene photopolymerization

Author:
Li, Yongsheng; Ren, Meng; Lv, Pengfei; Liu, Yingzhi; Shao, Hong; Wang, Cong; Tang, Changyu; Zhou, Yuanlin; Shuai, Maobing
Source:
Journal of materials chemistry A 2019 v.7 no.12 pp. 7256
ISSN:
2050-7496
Subject:
hydrophobicity,   etc   ; rubber; silica gel; silicone;     Show all 4 Subjects
Abstract:
... Correction for ‘A robust and flexible bulk superhydrophobic material from silicone rubber/silica gel prepared by thiol–ene photopolymerization’ by Yongsheng Li et al., J. Mater. Chem. A, 2019, DOI: 10.1039/c8ta11111a. ...
DOI:
10.1039/c9ta90065a

7. Site-Selective Functionalization of Linear Diterpenoids through U-Shaped Folding in a Confined Artificial Cavity

Author:
Takezawa, Hiroki; Kanda, Tomoya; Nanjo, Hikaru; Fujita, Makoto
Source:
Journal of the American Chemical Society 2019 v.141 no.13 pp. 5112-5115
ISSN:
1520-5126
Subject:
hydrophobicity,   etc   ; Lewis acids; diterpenoids; enzymes;     Show all 4 Subjects
Abstract:
... Even flexible linear substrates are conformationally fixed within the hydrophobic confined cavities of enzymes. This enables preorganization of the substrates and their positioning in close proximity to the active center to facilitate stereo- and site-selective reactions. Here, we demonstrate the site-selective electrophilic addition of linear diterpenoids within a self-assembled coordination cage ...
DOI:
10.1021/jacs.9b00131

8. Versatile N-Methylaminooxy-Functionalized Polypeptides for Preparation of Neoglycoconjugates

Author:
Wollenberg, Alexander L.; Perlin, Pesach; Deming, Timothy J.
Source:
Biomacromolecules 2019 v.20 no.4 pp. 1756-1764
ISSN:
1526-4602
Subject:
hydrophobicity,   etc   ; glycoproteins; moieties; pH; polypeptides;     Show all 5 Subjects
Abstract:
... The preparation and characterization of a new set of well-defined polypeptides containing N-methylaminooxy side-chain functionality is described. These functional groups enabled the direct coupling of polypeptides with a variety of unmodified reducing saccharides in water to give neoglycopolypeptides in high yields. The use of different polypeptide scaffolds resulted in neoglycoconjugates with tun ...
DOI:
10.1021/acs.biomac.9b00138

9. Solvent-assisted synthesis of a shape-persistent chiral polyaza gigantocycle characterized by a very large internal cavity and extraordinarily high amplitude of the ECD exciton couplet

Author:
Zgorzelak, Mikołaj; Grajewski, Jakub; Gawroński, Jacek; Kwit, Marcin
Source:
Chemical communications 2019 v.55 no.16 pp. 2301-2304
ISSN:
1364-548X
Subject:
hydrophobicity,   etc   ; chemical compounds; chemical reactions;     Show all 3 Subjects
Abstract:
... A giant, chiral square-shaped octaimine macrocycle has been obtained in a controlled manner from readily available and inexpensive substrates: 9,10-diphenylanthracene-based dialdehyde and trans-1,2-diaminocyclohexane. Reduction of the polyimine led to a chiral octaamine characterized by a very large internal hydrophobic cavity. ...
DOI:
10.1039/c8cc10184a

10. Selectivity of the CUBAN domain in the recognition of ubiquitin and NEDD8

Author:
Castagnoli, Luisa; Mandaliti, Walter; Nepravishta, Ridvan; Valentini, Eleonora; Mattioni, Anna; Procopio, Radha; Iannuccelli, Marta; Polo, Simona; Paci, Maurizio; Cesareni, Gianni; Santonico, Elena
Source:
TheFEBS journal 2019 v.286 no.4 pp. 653-677
ISSN:
1742-464X
Subject:
hydrophobicity,   etc   ; alanine; arginine; enzymes; ubiquitin;     Show all 5 Subjects
Abstract:
... Among the members of the ubiquitin‐like (Ubl) protein family, neural precursor cell expressed developmentally down‐regulated protein 8 (NEDD8) is the closest in sequence to ubiquitin (57% identity). The two modification mechanisms and their functions, however, are highly distinct and the two Ubls are not interchangeable. A complex network of interactions between modifying enzymes and adaptors, mos ...
DOI:
10.1111/febs.14752

11. Activity-Enhanced Self-Assembly of a Colloidal Kagome Lattice

Author:
Mallory, Stewart A.; Cacciuto, Angelo
Source:
Journal of the American Chemical Society 2019 v.141 no.6 pp. 2500-2507
ISSN:
1520-5126
Subject:
hydrophobicity,   etc   ; colloids; computer simulation; nanoparticles;     Show all 4 Subjects
Abstract:
... Here, we describe a method for the enhanced self-assembly of triblock Janus colloids targeted to form a kagome lattice. Using computer simulations, we demonstrate that the formation of this elusive structure can be significantly improved by self-propelling or activating the colloids along the axis connecting their hydrophobic hemispheres. The process by which metastable aggregates are destabilized ...
DOI:
10.1021/jacs.8b12165

12. Protein Hydration Waters Are Susceptible to Unfavorable Perturbations

Author:
Rego, Nicholas B.; Xi, Erte; Patel, Amish J.
Source:
Journal of the American Chemical Society 2019 v.141 no.5 pp. 2080-2086
ISSN:
1520-5126
Subject:
hydrophobicity,   etc   ; molecular dynamics; proteins; sampling;     Show all 4 Subjects
Abstract:
... The interactions of a protein, its phase behavior, and, ultimately, its ability to function are all influenced by the interactions between the protein and its hydration waters. Here, we study proteins with a variety of sizes, shapes, chemistries, and biological functions and characterize their interactions with their hydration waters using molecular simulations and enhanced sampling techniques. We ...
DOI:
10.1021/jacs.8b11448

13. Understanding Uniform, Fast, and Scalable Buoyancy-Driven Macro-Sized Drop Generations

Author:
Jung, Youngkyun; Do, Taegu; Choi, Ung Su; Choi, Sun
Source:
Langmuir 2019 v.35 no.4 pp. 990-999
ISSN:
1520-5827
Subject:
hydrophobicity,   etc   ; hydrophilicity; models; standard deviation;     Show all 4 Subjects
Abstract:
... Generating uniform drops with fast production rate and tunable volume in a high-throughput way is important in various academic and industrial disciplines. In this study, we propose a strategy to produce milliscale drop in a size-tunable way and model its formation processes. The size of generated drops is uniform (<1% of the standard deviation) and tunable by controlling the flow rate, the pore d ...
DOI:
10.1021/acs.langmuir.8b03613

14. A case of anisotropic exchange of non-polar chemicals with absorption-based passive samplers in water

Author:
Allan, Ian John; Jenssen, Marthe Torunn Solhaug
Source:
Chemosphere 2019 v.224 pp. 455-460
ISSN:
0045-6535
Subject:
hydrophobicity,   etc   ; anisotropy; fouling; freshwater; isotropy; particulates; samplers;     Show all 7 Subjects
Abstract:
... Passive sampling is a powerful technique for the sampling hydrophobic organic contaminants present at trace level in water. A robust application of performance reference compounds (PRCs) for the estimation of in situ sampling rates, requires that dissipation of PRC and uptake of target compounds follow the same processes, i.e. the existence of isotropic exchange between the sampler and water. We r ...
DOI:
10.1016/j.chemosphere.2019.02.135

15. Asymmetric micro-ratchets regulated drop dispensing on bamboo mimetic surface

Author:
Li, Ning; Li, Chuxin; Yu, Cunlong; Wang, Ting; Gao, Can; Dong, Zhichao; Jiang, Lei
Source:
Journal of materials chemistry A 2019 v.7 no.16 pp. 9550-9555
ISSN:
2050-7496
Subject:
hydrophobicity,   etc   ; Phyllostachys edulis; bamboos; bioassays; hydrophilicity; leaves;     Show all 6 Subjects
Abstract:
... The precise manipulation of drops in an open fluidic system is vital for chemical and biological assays. Despite extensive research, existing approaches still suffer from the need for complex apparatuses or channels with limitations to accurately control the volume of the dispensed drops, particularly in large volumes. Inspired by the water drop rolling trend difference on the Phyllostachys pubesc ...
DOI:
10.1039/c9ta01105f

16. Iridium-Catalyzed Enantioselective C(sp³)–H Amidation Controlled by Attractive Noncovalent Interactions

Author:
Wang, Hao; Park, Yoonsu; Bai, Ziqian; Chang, Sukbok; He, Gang; Chen, Gong
Source:
Journal of the American Chemical Society 2019 v.141 no.17 pp. 7194-7201
ISSN:
1520-5126
Subject:
hydrophobicity,   etc   ; catalysts; catalytic activity; enantioselectivity; lactams; ligands;     Show all 6 Subjects
Abstract:
... While remarkable progress has been made over the past decade, new design strategies for chiral catalysts in enantioselective C(sp³)–H functionalization reactions are still highly desirable. In particular, the ability to use attractive noncovalent interactions for rate acceleration and enantiocontrol would significantly expand the current arsenal for asymmetric metal catalysis. Herein, we report th ...
DOI:
10.1021/jacs.9b02811

17. Adsorption of methyl tert-butyl ether (MTBE) onto ZSM-5 zeolite: Fixed-bed column tests, breakthrough curve modelling and regeneration

Author:
Zhang, Yunhui; Jin, Fei; Shen, Zhengtao; Wang, Fei; Lynch, Rod; Al-Tabbaa, Abir
Source:
Chemosphere 2019 v.220 pp. 422-431
ISSN:
0045-6535
Subject:
hydrophobicity,   etc   ; adsorption; dose response; groundwater; models; zeolites;     Show all 6 Subjects
Abstract:
... ZSM-5, as a hydrophobic zeolite, has a good adsorption capacity for methyl tert-butyl ether (MTBE) in batch adsorption studies. This study explores the applicability of ZSM-5 as a reactive material in permeable reactive barriers (PRBs) to decontaminate the MTBE-containing groundwater. A series of laboratory scale fixed-bed column tests were carried out to determine the breakthrough curves and eval ...
DOI:
10.1016/j.chemosphere.2018.12.170

18. Asymmetric wetting Janus fabrics with double-woven structure for oil/water separation

Author:
Yao, Chengjian; Luo, Meiyin; Wang, Helan; Xu, Bi; Cai, Zaisheng
Source:
Journal of materials science 2019 v.54 no.7 pp. 5942-5951
ISSN:
0022-2461
Subject:
hydrophobicity,   etc   ; fabrics; hydrophilicity; oils; permeability; wettability; yarns;     Show all 7 Subjects
Abstract:
... The asymmetric wetting Janus fabric with double-woven structure was designed by using two systems of warp yarns and two types of the weft yarns with distinct wettability. The result shows that the fabric with double-woven structure possesses the asymmetric wettability with superhydrophobicity on one side while superhydrophilicity on the other side. This asymmetric wettability realizes a unidirecti ...
DOI:
10.1007/s10853-018-03241-6

19. Water Dynamics in the Hydration Shell of Amphiphilic Macromolecules

Author:
Zhang, Jiaqi; Liu, Liyuan; Chen, Yu; Wang, Bin; Ouyang, Chunmei; Tian, Zhen; Gu, Jianqiang; Zhang, Xueqian; He, Mingxia; Han, Jiaguang; Zhang, Weili
Source:
TheJournal of physical chemistry 2019 v.123 no.13 pp. 2971-2977
ISSN:
1520-5207
Subject:
hydrophobicity,   etc   ; hydrogen bonding; moieties; spectroscopy; surfactants;     Show all 5 Subjects
Abstract:
... In the present work, the dynamics of water in the hydration shell of amphiphilic hyperbranched polyglycerol (HPG) molecules was investigated using THz and GHz dielectric relaxation spectroscopies. Different from the typical small amphiphilic molecules, the HPG macromolecule provides a rather dispersionless background and allows the direct observation of four types of water molecules in the hydrati ...
DOI:
10.1021/acs.jpcb.9b02040

20. Semicrystalline physical hydrogels with shape-memory and self-healing properties

Author:
Okay, Oguz
Source:
Journal of materials chemistry B 2019 v.7 no.10 pp. 1581-1596
ISSN:
2050-7518
Subject:
hydrophobicity,   etc   ; crosslinking; hydrogels; hydrophilicity; melting point;     Show all 5 Subjects
Abstract:
... Synthetic hydrogels are generally amorphous in nature without any order at the molecular level. This is in contrast to biological gels containing ordered aggregates contributing significantly to their mechanical performance. Semicrystalline hydrogels, first developed in 1994, are moderately water-swollen hydrogels containing crystalline domains. Recent work shows that physically cross-linked semic ...
DOI:
10.1039/c8tb02767f