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Polymer grafting is an efficient way to obtain functional cellulose nanocrystals. In this work, we used a “macro-RAFT (macromolecular reversible addition–fragmentation chain transfer) agent-assisted” strategy, which adds extra amount of amphiphilic macro-RAFT agent with low molecular weight to graft poly(N,N-dimethylacrylamide) (PDMA) from cellulose nanocrystals. Successful grafting was evidenced...
Natural polymer flocculants for wastewater treatment have received close attention in recent years. Here we used two flocculants, polyacrylamide and poly(N,N-dimethylacrylamide) grafted cellulose nanocrystals synthesized by a “macro-RAFT assisted” strategy, for the flocculation of kaolin suspension. The flocculation performance of these two flocculants, including flocculants dosage, settling time...
A kind of spherical cellulose nanocrystals was prepared by hydrolysis of microcrystalline cellulose with mixed acid. In order to improve the thermal stability, two methods were used: diminishing the acid sulfate groups by desulfation and neutralizing them by using NaOH solution. The thermal degradation behaviors were characterized by thermogravimetric analysis and differential scanning calorimetry...
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