Alkylated Meso‐Macroporous Metal–Organic Framework Hollow Tubes as Nanocontainers of Octadecane for Energy Storage and Thermal Regulation

Tang, Jia; Chen, Xingyu; Zhang, Liguo; Yang, Mei; Wang, Peng; Dong, Wenjun; Wang, Ge; Fang, Yu; Tao, Jinzhang

doi:10.1002/smll.201801970

Cited by 55 publications

(40 citation statements)

References 55 publications

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“…Construction of hierarchical structures in crystalline MOFs is considered an important strategy to realize controlled trimodal porous structures in materials. In order to build macro‐/mesoporous MOFs, much effort has been devoted . The major synthetic strategies include bottom‐up sol–gel process, template‐free and templating synthesis, replication process, and mechanochemical reaction methods .…”

Section: Introductionmentioning

confidence: 99%

Self‐Assembly of Metal–Organic Frameworks into Monolithic Materials with Highly Controlled Trimodal Pore Structures

2019

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We present at wo-step template-free approach towardm onolithic materials with controlled trimodal porous structures with macro-, meso-, and micropores.O ur method relies on two ordering processes in discrete length scales: 1) Spontaneous formation of macroporous structures in monolithic materials by the sol-gel process through the short-range ordered self-assembly of metal-organic frameworks (MOFs), and 2) reorganization of the framework structures in am ediator solution. The Zr-terephthalate-based MOF (UiO-66-NH 2 ) was adopted as aproof of concept. The self-assembly-induced phase separation process offered interconnected macropores with diameters ranging from 0.9 to 1.8 mm. The subsequent reorganization process converted the microporous structure from low crystalline framework to crystalline UiO-66. The resultant mesopore sizew ithin the skeletons was controlled in the range from 9to21 nm. This approach provides anovel way of designing spaces from nano-to micrometer scale in network-forming materials.

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Section: Introductionmentioning

confidence: 99%

Self‐Assembly of Metal–Organic Frameworks into Monolithic Materials with Highly Controlled Trimodal Pore Structures

2019

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“…FT‐IR analyses (Figure S8, Supporting Information) indicate that the typical absorption peaks of octadecane (2920 and 2850 cm −1 corresponding to the aliphatic C–H stretching vibration, 1470 cm −1 attributed to the C–H bending vibration) are observed in octadecane/ZIF‐67@IRMOF‐3‐C, which further demonstrates the successfully encapsulation of PCMs. [ 24 ] Phase change enthalpy is a reliable indicator for evaluating thermal energy storage capacity [ 25 ] which is investigated by DSC curves (Figure 3b,c). Different supports have different energy storage capacity (Table S1, Supporting Information).…”

Section: Resultsmentioning

confidence: 99%

Network Structural CNTs Penetrate Porous Carbon Support for Phase‐Change Materials with Enhanced Electro‐Thermal Performance

Dong

et al. 2020

Adv Elect Materials

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Electro‐thermal phase‐change materials (PCMs) enable continuous operation of heating‐related processes, which is urgently required for modern thermal‐management devices. Driven by the unmet needs to develop promising electro‐thermal PCMs with low operation voltage and high electro‐thermal storage efficiency simultaneously, unique ZIF@MOF‐derived carbon‐nanotube (CNT)‐penetrated porous carbon supports for electro‐thermal PCMs are introduced. The network structure of the support decreases the resistivity of the composite and ensures a low operation voltage. Furthermore, abundant CNT cores in porous carbon shells facilitate interfacial interaction between the PCMs and the support and realize a rapid heat transformation. It is noted that low thermal conductive porous carbon shells prevent convective heat dissipation at the CNT‐air interface to a great degree which leads to enhanced electro‐thermal storage efficiency. Consequently, the obtained electro‐thermal PCMs exhibit a low operation voltage of 1.1 V and a record‐high electro‐thermal storage efficiency of 94.5%, which shows great potential in thermal management of electronic devices.

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“…[ 11 ] For these stabilized PCMs, the mobility and arrangement of their molecules are generally restricted to a small area, and only crystalline structures can be reversibly changed by varying the temperature. [ 12 ] However, the overall morphologies and shapes of PCMs mainly depend on stabilizing substrates (e.g., silica shells, metal–organic frameworks, porous graphene, and coaxial fibers), [ 13,14 ] to obtain PCMs in micro/nanoparticles, porous tubes, foams, bulk sheets, and fibers.…”

Section: Figurementioning

confidence: 99%

Multifunctional Reversible Self‐Assembled Structures of Cellulose‐Derived Phase‐Change Nanocrystals

et al. 2020

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Owing to advantageous properties attributed to well‐organized structures, multifunctional materials with reversible hierarchical and highly ordered arrangement in solid‐state assembled structures have drawn tremendous interest. However, such materials rarely exist. Based on the reversible phase transition of phase‐change materials (PCMs), phase‐change nanocrystals (C18‐UCNCs) are presented herein, which are capable of self‐assembling into well‐ordered hierarchical structures. C18‐UCNCs have a core–shell structure consisting of a cellulose crystalline core that retains the basic structure and a soft shell containing octadecyl chains that allow phase transition. The distinct core–shell structure and phase transition of octadecyl chains allow C18‐UCNCs to self‐assemble into flaky nano/microstructures. These self‐assembled C18‐UCNCs exhibit efficient thermal transport and light‐to‐thermal energy conversion, and thus are promising for thermosensitive imaging. Specifically, flaky self‐assembled nano/microstructures with manipulable surface morphology, surface wetting, and optical properties are thermoreversible and show thermally induced self‐healing properties. By using phase‐change nanocrystals as a novel group of PCMs, reversible self‐assembled multifunctional materials can be engineered. This study proposes a promising approach for constructing self‐assembled hierarchical structures by using phase‐change nanocrystals and thereby significantly expands the application of PCMs.

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Alkylated Meso‐Macroporous Metal–Organic Framework Hollow Tubes as Nanocontainers of Octadecane for Energy Storage and Thermal Regulation

Cited by 55 publications

References 55 publications

Self‐Assembly of Metal–Organic Frameworks into Monolithic Materials with Highly Controlled Trimodal Pore Structures

Self‐Assembly of Metal–Organic Frameworks into Monolithic Materials with Highly Controlled Trimodal Pore Structures

Network Structural CNTs Penetrate Porous Carbon Support for Phase‐Change Materials with Enhanced Electro‐Thermal Performance

Multifunctional Reversible Self‐Assembled Structures of Cellulose‐Derived Phase‐Change Nanocrystals

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