A hierarchically porous cellulose monolith: A template-free fabricated, morphology-tunable, and easily functionalizable platform

Xin, Yuanrong; Xiong, Qiancheng; Bai, Qiuhong; Miyamoto, Miwa; Liu, Cong; Shen, Yehua; Uyama, Hiroshi

doi:10.1016/j.carbpol.2016.10.006

Cited by 77 publications

(42 citation statements)

References 49 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…They have many applications such as chromatography, catalysis and immobilization of biomolecules, and they are considered an outstanding functional material for various uses. [1][2][3] Polymer monoliths can be fabricated either by polymerization or phase separation. [4][5][6] We have developed fabrication methods for polymer monoliths by thermally-induced phase separation (TIPS) or nonsolventinduced phase separation of a polymer solution toward a variety of polymers.…”

Section: Introductionmentioning

confidence: 99%

“…[7][8][9][10] For cellulose acetate (CA), a TIPS method using a mixture of N,N-dimethylformamide (DMF) and 1-hexanol as phase separation solvent gave a monolith with a hierarchically porous structure. 1,11 In recent years, cellulose, which is the most important forestry resource, has been converted into high-value products, and applications of cellulose have attracted great attention from both academia and industry due to shortage of fossil fuels. Among cellulose derivatives, CA is one of the most widely used cellulose-based plastics, and its typical applications are paints, textile bers, cigarette lters, packaging materials, lms and reverse osmosis membranes.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

A cellulose acetate/Amygdalus pedunculata shell-derived activated carbon composite monolith for phenol adsorption

et al. 2018

Self Cite

View full text Add to dashboard Cite

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A cellulose acetate/Amygdalus pedunculata shell-derived activated carbon composite monolith for phenol adsorption

et al. 2018

Self Cite

View full text Add to dashboard Cite

show abstract

“…[22,23] Our research group reported that a solution of poly(methyl methacrylate) (PMMA) and its copolymer with glycidyl methacrylate-which was dissolved in a mixture of heated ethanol and water-formed a solid white monolith after cooling and drying. [24,25] In addition, monoliths of a series of other polymers such as polyacrylonitrile copolymer, [26] poly(γ-glutamic acid), [27] poly(ethylene-co-vinyl alcohol), [28] poly(l-lactic acid), [29] and cellulose acetate (CA) [30] have been developed using the TIPS method.…”

Section: Introductionmentioning

confidence: 99%

Christiansen Effect‐Based Physical Coloration of a Cellulosic Monolith Conveniently Fabricated Using Thermally Induced Phase Separation

Takéuchi

Hayashi

Uyama

2020

Macro Chemistry & Physics

Self Cite

View full text Add to dashboard Cite

dependence-of the refractive indexes of two phases is significantly different. Unlike for dyes and pigments, the physical coloration based on the Christiansen effect is not caused by light absorption, and thus color fading in a two-phase system with stable chemical structures hardly occurs. Therefore, coloration based on the Christiansen effect has been expected to provide novel colored materials with high long-term stability, like structural coloration. [3,4] A number of studies of the Christiansen effect have been reported; [5-7] however, there have been few studies of organic polymers exhibiting this interesting effect. [8-10] Recently, monoliths-3D porous materials with bicontinuous structure-have been attracting significant attention in science and engineering fields owing to their unique properties. [11,12] Monoliths are composed of nanometer-scale to micrometer-scale skeletons and pores, and thus possess high specific surface area and porosity. A monolithic molded column generally shows a better fluid permeability than hydrogel beads or a porous powder column. Owing to these characteristics, monoliths are promising in many applications such as chromatographic columns, adsorbents for environmental pollutants, immobilized catalyst supports, and oil/water separation. [13-17] Numerous methods for fabricating polymer monoliths from their monomers have been developed, including polymerization-induced phase separation, high internal phase emulsion templating, cryogelation, and electron beam curing. [18-21] However, methods that use monomers as the starting material have disadvantages, including the need for additives such as emulsifiers and porogens, as well as time-consuming and complicated procedures. In addition, precise control of the conditions must be simultaneously maintained during the polymerization and phase separation to achieve a homogeneous porous structure. Polymer monoliths can also be directly fabricated from polymer solutions using the phase separation method. When an appropriate stimulus-such as cooling, addition of nonsolvent, or solvent evaporation-is applied to a homogeneous polymer solution, sequential phase separation proceeds and results in the formation of a polymer monolith. The thermally induced phase separation (TIPS) method is a facile way of A cellulose acetate (CA) polymer monolith is conveniently fabricated using the thermally induced phase separation method. When a CA monolith in sheet form is immersed in a non-solvent mixture with a suitable refractive index, transparent coloration due to the Christiansen effect is observed. This colorization is arbitrarily controlled by temperature and the non-solvent composition. The wavelength of maximum transmission of the immersed monolith spectrum increases-with high sensitivity-at high temperatures and in non-solvent with a low refractive index, while being independent of the monolith morphology. Following the alkali hydrolysis of the CA monolith, the transmission spectrum of regenerated cellulose monolith immersed in mixed non-solvent cle...

show abstract

“…The NIPS method has been adopted to fabricate a series of HSPPMs [17,18,19]. The obtained cellulose/TiO 2 monoliths possess interconnected porosity in different length scales, and high specific surface area.…”

Section: Introductionmentioning

confidence: 99%

One-Pot Route towards Active TiO2 Doped Hierarchically Porous Cellulose: Highly Efficient Photocatalysts for Methylene Blue Degradation

et al. 2017

Self Cite

View full text Add to dashboard Cite

In this study, novel photocatalyst monolith materials were successfully fabricated by a non-solvent induced phase separation (NIPS) technique. By adding a certain amount of ethyl acetate (as non-solvent) into a cellulose/LiCl/N,N-dimethylacetamide (DMAc) solution, and successively adding titanium dioxide (TiO2) nanoparticles (NPs), cellulose/TiO2 composite monoliths with hierarchically porous structures were easily formed. The obtained composite monoliths possessed mesopores, and two kinds of macropores. Scanning Electron Microscope (SEM), Energy Dispersive Spectroscopy (EDS), Fourier Transform Infrared Spectroscopy (FT-IR), X-ray Diffraction (XRD), Brunauer-Emmett-Teller (BET), and Ultraviolet-visible Spectroscopy (UV-Vis) measurements were adopted to characterize the cellulose/TiO2 composite monolith. The cellulose/TiO2 composite monoliths showed high efficiency of photocatalytic activity in the decomposition of methylene blue dye, which was decomposed up to 99% within 60 min under UV light. Moreover, the composite monoliths could retain 90% of the photodegradation efficiency after 10 cycles. The novel NIPS technique has great potential for fabricating recyclable photocatalysts with highly efficiency.

show abstract

A hierarchically porous cellulose monolith: A template-free fabricated, morphology-tunable, and easily functionalizable platform

Cited by 77 publications

References 49 publications

A cellulose acetate/Amygdalus pedunculata shell-derived activated carbon composite monolith for phenol adsorption

A cellulose acetate/Amygdalus pedunculata shell-derived activated carbon composite monolith for phenol adsorption

Christiansen Effect‐Based Physical Coloration of a Cellulosic Monolith Conveniently Fabricated Using Thermally Induced Phase Separation

One-Pot Route towards Active TiO2 Doped Hierarchically Porous Cellulose: Highly Efficient Photocatalysts for Methylene Blue Degradation

Contact Info

Product

Resources

About