Two-dimensional covalent organic frameworks (2D COFs) have attracted attention as versatile active materials in many applications. Recent advances demonstrated the synthesis of monolayer 2D COF via an air–water interface. However, interfacial polymerization mechanism has been elusive. In this work, we used a multiscale modeling strategy to study dimethylmethylene-bridged triphenylamine building...

The mechanical properties of cells change as they proceed through the cell cycle, primarily owing to regulation of actin and myosin II. Most models for cell mechanics focus on actomyosin in the cortex and ignore possible roles in bulk cytoplasm. We explored cell cycle regulation of bulk cytoplasmic actomyosin in Xenopus egg extracts, which is almost undiluted cytoplasm from unfertilized eggs. W...

In this paper, optimization and control of a tubular reactor for thermal bulk post-polymerization of styrene have been investigated. By using the reactor mathematical model, static and dynamic simulations are carried out. Based on an objective function including polymer conversion and polydispersity, reactor optimal temperature profile has been obtained. In the absence of model mismatch, de...

Raman spectroscopy are used to characterize the chemical changes in normoxic polyhydroxyethylacrylate gel dosimeter (PHEA) induced by radiation. Irradiations in the low dose region are performed and the polymerizations of PHEA gels are monitored by the observing the changes of Raman shift intensity of the carbon covalent bond of PHEA originated from both monomer and the cross-linker. The variat...

Herein we demonstrate that dynamic covalent chemistry can be used to induce reversible morphological transitions in block copolymer nano-objects and hydrogels. Poly(glycerol monomethacrylate)-poly(2-hydroxypropyl methacrylate) (PGMA-PHPMA) diblock copolymer nano-objects (vesicles or worms) were prepared via polymerization-induced self-assembly. Addition of 4-carboxyphenylboronic acid (CPBA) lea...

The effects of solvent dielectric constant and temperature on the non-covalent interactions between gold nanoparticles and carbon nanotubes have been explored. Our experiments have shown that fewer nanoparticles are adsorbed onto nanotubes in high dielectric assembly environments. This has been correlated with an increase in the differential capacitance of nanoparticles relative to the bulk sol...

Catalyzed Ring-Opening Polymerization (ROP) of lactones, such as c-caprolactone and ii-vnlerolactone. ha\ been investigated for preparing aliphatic polycsrer-grafted corn starch compositions. The polynieri7ntion has been carried out either i n bulk (without solvent) or in I0 wtQ grunular starch i n toluene \uspension. aftcr adequate activation of thc starch wrface arnylosc/amylopectin hydroxyl ...