Two-Component Dendritic Gels:  Easily Tunable Materials

Hirst, Andrew R.; Smith, David K.; Feiters, Martin C.; Geurts, Hubertus P. M.; Wright, Andrew

doi:10.1021/ja036111q

Cited by 209 publications

(98 citation statements)

References 6 publications

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“…The critical gelation concentrations (C gel ) and critical gel-sol transition temperatures (T gel ) were determined through tube inversion technology. 36 As shown in Table 1, the C gel of the synthesized BDB triblock copolymers varied from 3.50 wt% to 0.30 wt% and the T gel varied from 41 to 45 C. And the value of C gel decreased with the increase of PBLG length, while the T gel increased as the PBLG length increased. Thus, the degree of polymerization of the PBLG block had an important effect on the gelation of PBLG-b-PDMS-b-PBLG triblock copolymers since the stacking between the PBLG helices in combination with the p-p interaction were the main driving force of the self-assembly.…”

Section: The Gelation Behaviors Of Bdb Tribcps With the Incorporationmentioning

confidence: 90%

“…Gelation concentration was determined by preparing a series of different concentrated solutions and the gelation was monitored by tube inversion technique. 36,37 And the sol-gel transition temperature was monitored by tube inversion technique during heating process of the gel.…”

Section: Synthetic Proceduresmentioning

confidence: 99%

“…The sol-gel transition temperatures (T gel ) and gelation concentrations (C gel ) were determined by tube inversion technology. 36,37 All C gel and T gel values were measured in triplicates. Differential scanning calorimetry (DSC) was carried out using a TA Q2000 DSC (TA Instruments, USA) at a heating rate of 10 C min À1 under nitrogen ow.…”

Section: Synthetic Proceduresmentioning

confidence: 99%

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A novel self-assembled hybrid organogel of polypeptide-based block copolymers with inclusion of polypeptide-functionalized graphene

Lei

Shi

et al. 2017

RSC Adv.

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Self-assembled hybrid organogels of polypeptides containing block copolymers with the inclusion of polypeptide-functionalized graphene were designed and elaborately prepared, and showed interesting microstructures as well as enhanced mechanical performances. Firstly, a series of peptide-based triblock copolymers (triBCPs),, with different lengths of PBLG helices, were synthesized and characterized. As the length of the PBLG helices increased, the critical gelation concentration of the BDB triBCPs decreased while the gel-sol transition temperature increased. Moreover, the PBLG covalently modified graphene oxide (GO) sheets were successfully incorporated into the BDB organogels in toluene and hybrid organogels were prepared. In the presence of GO sheets, the minimum gelation concentration of the hybrid organogel was slightly lowered, and the hybrid organogels preserved thermoreversibility. In the hybrid gels, the triBCPs still self-assembled into nanoribbon structures and the functionalized GO sheets were well dispersed in the gel medium, which was obviously observed by transmission electron microscopy. In addition, the inclusion of the functionalized graphene greatly enhanced the mechanical performance of the hybrid gels, which was demonstrated by the significant increase of the moduli and the fracture stress of the hybrid gels compared with the corresponding native gels in the rheology experiments.

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Section: The Gelation Behaviors Of Bdb Tribcps With the Incorporationmentioning

confidence: 90%

Section: Synthetic Proceduresmentioning

confidence: 99%

Section: Synthetic Proceduresmentioning

confidence: 99%

See 1 more Smart Citation

A novel self-assembled hybrid organogel of polypeptide-based block copolymers with inclusion of polypeptide-functionalized graphene

Lei

Shi

et al. 2017

RSC Adv.

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“…[17] Increasing the amount of diamine relative to the dendritic branch changed the propensity of this system to induce macroscopic gelation, and ultimately gave rise to a completely new morphology in which micrometer sized platelets were observed ( Figure 2).…”

Section: Two-component Organogelatorsmentioning

confidence: 99%

Two‐Component Gel‐Phase Materials—Highly Tunable Self‐Assembling Systems

Hirst

Smith

2005

Chemistry A European J

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352

134

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In the past 10 years, the molecular self-assembly and network formation of small molecule gelators has become one of the most active frontiers of the emergent area of nanochemistry. Increasingly, research efforts have begun to focus on multicomponent gelators, which rely on the initial interaction of distinct individual components to form a complex that subsequently self-assembles into a fibrous supramolecular polymer. In true two-component systems, an individual component can be present in isotropic solution, and only on addition of the second component will a gel actually form. In some cases, however, two-component gels are reported in which the second component significantly modifies the behaviour of a known gelator. Both systems are discussed in this article. The additional level of supramolecular control in the hierarchical self-assembly of two-component gels confers exquisite tunability and controllability. Functionality can be readily built into the material by simple variation of one of the individual components. This article discusses the key approaches used to control self-assembly by manipulating single molecular-recognition events and illustrates how controlling the transcription of information from the molecular to the macroscopic level by the simple addition of a second component allows complex functional materials to be selectively assembled from simple building blocks.

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“…In a key study, Smith, Hirst and co-workers reported that the morphology of the nanoscale aggregates formed could be directly controlled using the ratio of dendrimer:diamine ( Figure 54) [138]. A 2:1 ratio gave rise to the expected fibrillar aggregates.…”

Section: Assembly Of One-dimensional Architectures Using Multiple Recmentioning

confidence: 99%

Self-assembly using dendritic building blocks—towards controllable nanomaterials

Smith

Hirst

Love

et al. 2005

Progress in Polymer Science

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177

100

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Two-Component Dendritic Gels: Easily Tunable Materials

Cited by 209 publications

References 6 publications

A novel self-assembled hybrid organogel of polypeptide-based block copolymers with inclusion of polypeptide-functionalized graphene

A novel self-assembled hybrid organogel of polypeptide-based block copolymers with inclusion of polypeptide-functionalized graphene

Two‐Component Gel‐Phase Materials—Highly Tunable Self‐Assembling Systems

Self-assembly using dendritic building blocks—towards controllable nanomaterials

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