The invention discloses a
cholesteric liquid crystal and a reflective-type
circular polarization sheet thereof, and a manufacturing method. In the invention, a base material is coated with a guiding layer and the
cholesteric liquid crystal. Under an effect of an intermolecular
hydrogen bond, a
hydrogen bond
acceptor is migrated to an interface of the guiding layer and the
cholesteric liquid crystal so as to generate a
concentration gradient of a chiral molecule. Through
polymerization, a thread
pitch gradient is fixed so as to realize wide wave reflection of the reflective-type
circular polarization sheet. By using the manufacturing method in the invention, a traditional
liquid crystal orientation technology is omitted; through forming the
hydrogen bond, efficiency of realizing the thread
pitch gradient is increased; the thread
pitch gradient is realized without slow
polymerization, which is good for realizing industrialization and scalization. In the invention, a polymerizable
monomer material is preferably used; through the
polymerization, a crosslinking
polymer network is formed; and good
thermal mechanical stability and good
weather resistance are possessed; by using the manufacturing method in the invention, through repeated multilayer
coating, a selection reflection bandwidth of the cholesteric
liquid crystal can be greatly widened and a
circular polarization sheet of ultra wide wave reflection can be manufactured.