Robust and hydrophilic polymeric films with honeycomb pattern and their cell scaffold applications

Li, Lei; Chen, Caikang; Li, Jian; Zhang, Aijuan; Liu, Xinyu; Xu, Bin; Gao, Shu-Bin; Jin, Guang‐Hui; Ma, Zhi

doi:10.1039/b820279f

Cited by 102 publications

(87 citation statements)

References 34 publications

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“…One is based on the strategy of posttreatment on an as-prepared fi lm. [ 1,5,13 ] That is, to prepare a normal honeycomb fi lm fi rst and then stimuli-responsive moieties are introduced by further surface modifi cation. For example, Stenzel and co-workers prepared the fi rst example of thermoresponsive honeycomb structured porous polymer fi lm by grafting poly( N -isopropylacrylamide) (PNIPAAm) onto a honeycomb fi lm via reversible additionfragmentation transfer polymerization.…”

mentioning

confidence: 99%

CO₂‐Induced Tunable and Reversible Surface Wettability of Honeycomb Structured Porous Films for Cell Adhesion

Yin

Bulteau

Feng

et al. 2016

Adv Materials Inter

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of developing different polymers to fabricate honeycomb fi lms with different surface wettability. The reversible control of wettability enables fi lms to be recycled and reused, as a result, the production cost will be largely reduced. Moreover, adjustable wettability of interfacial materials has versatile potentials in many applications, such as controlled drug delivery, cells capture and release, and oil/water separation, in which wettability acts as a switch. [ 15 ] Therefore, development of honeycomb fi lms with tunable and reversible surface wettability is of great importance for both fundamental research and practical applications.Wettability is largely dependent on surface structure and chemical composition of the materials. [ 13,16,17 ] Generally, honeycomb fi lm surface exhibits hydrophobic characteristics derived from the hydrophobic polymer and the presence of micron-sized holes which is similar to the "lotus-effect" of plant leaves. [ 13,18 ] Considering the special morphology of honeycomb fi lms, introduction of stimuli-responsive groups on fi lm surface makes it an appropriate way to realize the adjustment of surface wettability since the reversible physical properties change can be easily achieved upon exposure to external stimulation. Hence, two approaches have been developed to introduce sensitive groups on honeycomb fi lm surface. One is based on the strategy of posttreatment on an as-prepared fi lm. [ 1,5,13 ] That is, to prepare a normal honeycomb fi lm fi rst and then stimuli-responsive moieties are introduced by further surface modifi cation. For example, Stenzel and co-workers prepared the fi rst example of thermoresponsive honeycomb structured porous polymer fi lm by grafting poly( N -isopropylacrylamide) (PNIPAAm) onto a honeycomb fi lm via reversible additionfragmentation transfer polymerization. [ 13 ] The modifi ed fi lm surface changes from hydrophobic to hydrophilic when temperature declines from 45 to 25 °C. However, postmodifi cation on honeycomb fi lm is, in fact, rather complicated, usually including several steps. In contrast, the strategy that directly employs stimuli-responsive polymer to fabricate honeycomb fi lm with smart surface is more preferred due to its simplicity and effi ciency. [ 16,17,19,20 ] In this case, the hydrophilic sensitive groups concentrate on the inner surfaces of the pores or further form nanophase structures inside the walls of the honeycomb fi lms, thereby conferring the fi lms tunable surfaces wettability. [ 16,19 ] For instance, Hu and co-workers reported the fi rst pH-responsive honeycomb fi lm by polystyrene-b -polyacrylic acid (PS-b -PAA) self-assembly. [ 17 ] The water contact angle (CA) of the original fi lm with 1.5 µm pore diameter is 96°, while it increases to 120° after the treatment with an acid aqueous solution (pH 4.0), it sharply decreases to 10° after the treatment of a base aqueous solution (pH 10.0), ascribing to the protonation of carboxylic acid groups that leads to an increase of hydrophilicity. Later, Billon and co-workers [ 19...

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mentioning

confidence: 99%

CO₂‐Induced Tunable and Reversible Surface Wettability of Honeycomb Structured Porous Films for Cell Adhesion

Yin

Bulteau

Feng

et al. 2016

Adv Materials Inter

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“…12 Among the many methods, [13][14][15][16] the water-droplet templating method, namely the breath figure method, is mostly used for the preparation periodic array porous films. 1,[17][18][19][20][21][22][23] During the preparation, a polymer solution is cast on a substrate under a humid atmosphere. The cooling surface caused by rapid solvent evaporation results in the water vapor condensation, and then the condensed water droplets are trapped into the solution.…”

Section: Introductionmentioning

confidence: 99%

Microsphere Pattern Prepared by a “Reverse” Breath Figure Method

Xiong

Zou

et al. 2009

Macromolecules

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We have reported an interesting method, named reverse breath figure, for the preparation of polymeric microsphere patterns. By the same procedure as breath figure, instead of under a humid atmosphere, linear and star-shaped poly(styrene-block-butadiene) copolymers dissolved in solvents such as toluene, trichloroform, and dichloromethane were cast onto the surface of a glass substrate in methanol or ethanol vapor. After the complete evaporation of the solvent, microspheres with the diameters ranging from hundreds of nanometers to several micrometers were prepared. The microsphere patterns are the reverse of the honeycomb porous structure of breath figure. The mechanism of the microsphere formation has been studied to show that when the surface tension of the polymer solution is 1.5 mN/m higher than that of the condensed liquid, microsphere patterns can be prepared, whereas a honeycomb porous film of breath figure can be obtained when the surface tension of the polymer solution is lower than that of the condensed liquid. The viscosity of the polymer solution is also an important factor to influence the fabrication of the microsphere patterns.

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“…The authors reported the beneficial effects of the photochemical process and pointed out that the formation of polar groups on the film surface alters surface wettability from hydrophobic to hydrophilic and the resulting films were non-cytotoxic and suitable for cell scaffolds. 187 Li et al reported highly ordered cross-linked PS thin films by using the breath figures method.…”

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Droplet condensation on polymer surfaces: A review

UÇAR¹

2013

Turk J Chem

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A novel root inclusion net method was designed to determine the fine root productions and turnover rates of 13-, 22-, and 38-year-old Larix principis-rupprechtii plantations in the whole growing season of 2012, and it was compared with the results of the sequential coring method and in-growth core method. All following values are reported in order for 13-, 22-, and 38-year-old L. principis-rupprechtii plantations. The mean values of fine root biomasses were 103, 261, and 356 g m -2 , about 76-78% of which were live fine root biomasses. The fine root productions were 86-118 g m -2 year -1 , 124-138 g m -2 year -1 , and 134-160 g m -2 year -1 , respectively. The fine root turnover rates were 1.12, 0.61, and 0.51 times year -1 , respectively, suggesting a relative slow fine root turnover in L. principisrupprechtii plantations. The carbon inputs into soil accompanying fine root turnover were 52, 58, and 94 g C m -2 year -1 . This organic carbon is a sizeable pool in the forest ecosystem. The results suggest that our new modified root inclusion net method is suitable for field-based assessment of fine root production and turnover.

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Robust and hydrophilic polymeric films with honeycomb pattern and their cell scaffold applications

Cited by 102 publications

References 34 publications

CO₂‐Induced Tunable and Reversible Surface Wettability of Honeycomb Structured Porous Films for Cell Adhesion

CO₂‐Induced Tunable and Reversible Surface Wettability of Honeycomb Structured Porous Films for Cell Adhesion

Microsphere Pattern Prepared by a “Reverse” Breath Figure Method

Droplet condensation on polymer surfaces: A review

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Robust and hydrophilic polymeric films with honeycomb pattern and their cell scaffold applications

Cited by 102 publications

References 34 publications

CO2‐Induced Tunable and Reversible Surface Wettability of Honeycomb Structured Porous Films for Cell Adhesion

CO2‐Induced Tunable and Reversible Surface Wettability of Honeycomb Structured Porous Films for Cell Adhesion

Microsphere Pattern Prepared by a “Reverse” Breath Figure Method

Droplet condensation on polymer surfaces: A review

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CO₂‐Induced Tunable and Reversible Surface Wettability of Honeycomb Structured Porous Films for Cell Adhesion

CO₂‐Induced Tunable and Reversible Surface Wettability of Honeycomb Structured Porous Films for Cell Adhesion