Organoclay oligomers

Hb and GOx, respectively. The variation in nanopartide size showed a direct correlation with the respective molecular dimensions of the different proteins, suggesting that each nanoparticle comprised a single biomolecule enveloped by a continuous condensed sheet of organoclay oligomers, one unit cell layer in thickness. 

Higher-order organization of the organoclay-wrapped protein nanoparticles was achieved by tailoring the organic functionalities attached to the organoclay oligomers. 

Nanohybrids can be prepared in the form of intercalated layered nanocomposites produced by co-assembly of guest biomolecules in the presence of exfoliated organoclay sheets (Section 8.4), or by wrapping single biomolecules in ultrathin layers of condensed organoclay oligomers (Section 8.5). Such approaches should provide new general routes towards the development of functional biomaterials with numerous applications. 

Fig. 8.14 TEM images showing (A) self-assembled layers of individual myoglobin molecules wrapped by condensed oligomers of AMP (B) top view of single sheet showing ordered superstructure of the hydrophobic organoclay wrapped myoglobin molecules.

In addition to maleic anhydride-functionalized polyolefin oligomers or polymers, a major category of compatibilizers utilized are specifically synthesized homopolymers and/or copolymers that could modify the interactions and control the structure in polyolefin/ organoclay nanocomposites. 

Polystyrene/clay nanocomposites from polymer/oligomer modified organoclays... 

Figure 21 Ring-opening polymerization of ethylene terephthalate cyclic oligomers in the interlayer spacing of the organoclay. Lee et al. [13]. Reprodnced with permission of Elsevier.

One gram each of PMR-5 (oligomer with MW 500) and organoclay (clay 1 and clay 2) were mixed in methanol and stirred for 18 hours before the clay was separated from the suspension by filtration and rinsed with methanol to remove residual PMR-5. The intercalated clay was dried in a vacuum oven at 75X1 for... 

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