Study On Methodology Of Controlled Functionalization Of One-dimensional Non-carbon Inorganic Nanomaterials By Polymer

In recent years, one-dimension inorganic nanomaterials have caused for widespread concern due to their optical, acoustic and mechanical properties. However, they could not be dispersed well in water or organic solvents, due to their particularly surface areas. Thus the application of inorganic nanomaterials is limited. Meanwhile, polymers have excellent properties that inorganic compounds are difficult to replace, such as processability, biocompatibility, ect. Thus, the inorganic-organic hybrid nanomaterials emerge. The focus of this paper is one-dimensional non-carbon inorganic-polymer hybrid nanomaterials. Especially, the controlled polymerization was used to improve the one-dimension non-carbon inorganic nanomaterials. A variety of new types of nanomaterials, combined the properties of inorganic compounds and polymer, were prepared.First, "grafting to" was used: polyethylene glycol monomethyl ether was grafted to lanthanum hydroxide nanowires by amidation. With the functionalization, the nanowires could be dispersed in water well and the stability was improved.Then, the"in situ"grafting polymerization were used to modify the one-dimensional non-carbon inorganic nanomaterials. With the simple ways, the initiators of atom transfer radical polymerization (ATRP) or ring-opening polymerization (ROP) or the reversible chain transfer agents of reversible addition-fragmentation chain transfer (RAFT) were grafted to the surface of the nanowires. The modified nanowires were dispersed into the polymerization system. The fuctionalization were accomplished by the corresponding polymerization. The target products were characterized by FT-IR, 1H NMR, XPS and TGA, ect. The molecule weight and the polydispersity index were all measured to demonstrate the'controlled'polymerization by GPC. The three methods are all new and universal for functionalization on the surface of the one-dimension non-carbon nanomaterials.To characterize europium doped lanthanum phosphate-polycaprolactone(LaPO₄: Eu-PCL) one-dimensional hybrid nanomaterials, the properties of fluorescent and biodegradation were combined. It verified that lanthanum phosphate nanowires do little or no biological damage to the lipases. To characterize the temperature- response of europium doped lanthanum phosphate-poly(N-isopropylacrylamide) (LaPO₄: Eu-PNIPAM), the characteristics of phase transition of high-density PNIPAM were found. These new one-dimensional inorganic-organic hybrid nanomaterials are expected to use as sensors, biological probes, ect.