Innovative photomobile polymer, method for preparing said photomobile polymer without rubbing, 3d printing method of said photomobile polymer and 3d printer to implement said 3d printing method

2:

• A photomobile polymer (2) obtained by a process comprising doping:
• (a) a non-cross-linked resin (1) comprising at least one liquid crystal monomer;
• (b) an oligomer having an azobenzene moiety in a concentration comprised between 6 and 10 mol %, with ZnO nanoparticles in a concentration greater than or different from 6% and less than or equal to 7.5% by weight, and
• (c) a combination of (a) and (b),
• wherein the deposition thereof is on an appropriate substrate in which the substrate is not previously subjected to rubbing.

4:

• A method (200) of 3D printing a photomobile polymer (2) as set forth in claim 3, comprising:
• (a) Arranging a tank (10) configured to contain a predetermined amount of a non-cross-linked resin (1) of said photomobile polymer (2), said tank (10) comprising a handling device (11) configured to move a movable bed (12) within said tank (10),
• (b) Arranging a first light source (SL1), comprised in said tank (10), configured to selectively irradiate a first predetermined cross-linking layer (SR1) of said photomobile polymer (2) at said movable bed (12),
• (c) Arranging a second light source (SL2), comprised in said tank (10), configured to selectively irradiate a second predetermined cross-linking layer (SR2) of said photomobile polymer (2) at said movable bed (12) producing cross-linking thereof,
• (d) Inserting said non-cross-linked resin (1) into said tank (10),
• (e) Positioning said movable bed (12) at the non-cross-linked resin (R) to be polymerised,
• (f) Heating said tank (10) to a nematic temperature (Tn) of said non-cross-linked resin (1),
• (g) Irradiating with said:
• (i) first light source (SL1) and said first cross-linking layer (SR1) so as to achieve selective and localised self-alignment of said non-cross-linked resin (1),
• (ii) second light source (SL2) and said second cross-linking layer (SR2) so as to sculpt said non-cross-linked resin (1) by polymerising and aligning it, or
• (iii) both (i) and (ii), and
• (h) printing of said photomobile polymer (2) by moving by means of said handling device (11) said movable bed (12) in order to irradiate with said first and/or second light source (SL1, SL2) a new cross-linking layer distinct from said first or second cross-linking layer (SR1, SR2) and repeating steps e to (g).

6:

• The 3D printing method of claim 4, wherein said first light source (SL1) comprises:
• (a) a collimated lamp;
• (b) a strip of LEDs;
• (c) a polarised source,
• (d) polarised laser;
• (e) an unpolarised laser associated with a polarising foil and a plurality of mirrors or photonic crystals configured to selectively and rapidly reflect said laser light at said first cross-linking layer (SR1), or
• (f) any combination thereof.

12:

• A 3D printer (100) for printing a photomobile polymer (2) according to claim 2 by comprising
• (a) a tank (10) configured to contain a predetermined amount of a non-cross-linked resin (1) of said photomobile polymer (2), said tank (10) comprising a handling device (11) configured to move a movable bed (12) within said tank (10),
• (b) a first light source (SL1) configured to selectively irradiate a first predetermined cross-linking layer (SR1) of said photomobile polymer (2) at said movable bed (12) producing localised alignment thereof, and
• (c) a second light source (SL2) configured to selectively irradiate a second predetermined cross-linking layer (SR2) of said photomobile polymer (2) at said movable bed (12) producing cross-linking thereof.