CN105818382A - Method for constructing three-dimensional structure based on digital light processing - Google Patents
Method for constructing three-dimensional structure based on digital light processing Download PDFInfo
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- CN105818382A CN105818382A CN201610239890.0A CN201610239890A CN105818382A CN 105818382 A CN105818382 A CN 105818382A CN 201610239890 A CN201610239890 A CN 201610239890A CN 105818382 A CN105818382 A CN 105818382A
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y10/00—Processes of additive manufacturing
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F2/00—Processes of polymerisation
- C08F2/46—Polymerisation initiated by wave energy or particle radiation
- C08F2/48—Polymerisation initiated by wave energy or particle radiation by ultraviolet or visible light
- C08F2/50—Polymerisation initiated by wave energy or particle radiation by ultraviolet or visible light with sensitising agents
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F220/10—Esters
- C08F220/12—Esters of monohydric alcohols or phenols
- C08F220/16—Esters of monohydric alcohols or phenols of phenols or of alcohols containing two or more carbon atoms
- C08F220/18—Esters of monohydric alcohols or phenols of phenols or of alcohols containing two or more carbon atoms with acrylic or methacrylic acids
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F220/10—Esters
- C08F220/26—Esters containing oxygen in addition to the carboxy oxygen
- C08F220/28—Esters containing oxygen in addition to the carboxy oxygen containing no aromatic rings in the alcohol moiety
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F220/10—Esters
- C08F220/12—Esters of monohydric alcohols or phenols
- C08F220/16—Esters of monohydric alcohols or phenols of phenols or of alcohols containing two or more carbon atoms
- C08F220/18—Esters of monohydric alcohols or phenols of phenols or of alcohols containing two or more carbon atoms with acrylic or methacrylic acids
- C08F220/1804—C4-(meth)acrylate, e.g. butyl (meth)acrylate, isobutyl (meth)acrylate or tert-butyl (meth)acrylate
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
- C08F220/10—Esters
- C08F220/26—Esters containing oxygen in addition to the carboxy oxygen
- C08F220/28—Esters containing oxygen in addition to the carboxy oxygen containing no aromatic rings in the alcohol moiety
- C08F220/281—Esters containing oxygen in addition to the carboxy oxygen containing no aromatic rings in the alcohol moiety and containing only one oxygen, e.g. furfuryl (meth)acrylate or 2-methoxyethyl (meth)acrylate
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
Abstract
The invention discloses a method for constructing a three-dimensional structure based on digital light processing. The method includes the following steps that firstly, a photosensitive resin precursor solution comprising monomers and a light initiator is put into a plane die cavity; secondly, a DLP projector is used for conducting multiple times of local projection and exposure curing on the photosensitive resin precursor solution according to a preset two-dimensional pattern, and a heterogeneous two-dimensional plane is obtained; and thirdly, the heterogeneous two-dimensional plane obtained through curing is soaked into a solvent to be swelled, and a three-dimensional structure is obtained. The method is simple, convenient to implement and low in requirement for equipment and is much suitable for preparing accurate three-dimensional structures of polymers.
Description
Technical field
The present invention relates to Polymer Processing and manufacture field, particularly relate to a kind of method using digitized projection technology rapidly constructing three-dimensional structure.
Background technology
There is 3-D solid structure polymer product process typically by the method that mould is moulding.This traditional method, due to mould processing and the restriction of the later stage demoulding, often can only process some simple three dimensional structures.And, the construction cycle length of mould, input are big, efficiency is low.
It is a kind of to carry out the forming technique of constructed object by the way of successively printing based on mathematical model file that 3D prints (increase material manufacture), has been widely used for the direct manufacture of mould, the model manufacturing of industrial design and some products.3D printing technique is a kind of straight forming technology, it is not necessary to use mould.It addition, its most prominent advantage is to build some irregular, complicated three dimensional structures.But, all 3D printing techniques (including that fusion sediment FDM, selectivity Stereo Lithography SLA, digital light process DLP, selective laser sintering SLS etc.) are required for cutting into slices target object, print layer by layer, so the time needed for printing single body is relatively long.During in particular for higher printing precision, needing thickness thinner, the number of plies is more, and its time-write interval is also the most longer.Although the CLPS technology of Carbon company substantially increases the print speed of conventional DLP technology, but its absolute velocity is slower.
It is a kind of special material preparation technology that heterogeneous two dimensional surface is converted into three dimensional structure under certain condition.Its ultimate principle is distribution density and the gradient introducing material in prepared by two dimensional surface, the heterogeneous body two dimensional surface formed stores internal stress, internal stresses release under certain condition, being in the astable two dimensional surface of mechanics with regard to spontaneous nuclear transformation is specific three dimensional structure.Owing to the preparation speed of two dimensional surface is very fast, the process that two dimensional surface is converted into three dimensional structure is the fastest, so this kind of technology is expected to become the fast construction method of a kind of three dimensional structure.But, the distribution that current above-mentioned heterogeneous body two dimensional surface mainly realizes one of them network by the use of photomask in dual network structure realizes, and design freedom is the highest.Owing to final three dimensional structure is to be determined by the inhomogeneous distribution in two dimensional surface, so also simply some relatively simple three dimensional structures that this technological means obtains at present.
Summary of the invention
For solving the defect of prior art, a kind of method that the invention provides rapid build polymer three-dimensional structure: obtained the heterogeneous body two dimensional surface of an accurate control by digitized projection technology, this two dimensional surface is converted into three dimensional structure set in advance under certain condition.
A kind of method processing structure three dimensional structure based on digital light, comprises the steps:
Step (1): the photosensitive resin precursor liquid comprising monomer and light trigger is placed in plane die cavity；
Step (2): use DLP projector, by default two-dimensional pattern, photosensitive resin precursor liquid is carried out repeatedly partial projection, exposure curing；Obtain heterogeneous body two dimensional surface；
Step (3): heterogeneous body two dimensional surface solidification obtained is soaked in solvent swelling, it is thus achieved that 3-D solid structure.
The present invention obtains the heterogeneous body two dimensional surface of an accurate control by digitized projection technology, and the swelling character of two dimensional surface zones of different is different, and in swelling process, this two dimensional surface can be converted into three dimensional structure set in advance.The committed step of the inventive method is to use DLP projector that photosensitive resin carries out repeatedly selective area projection, exposure, makes zones of different have different degree of swelling；Determine that resin is fully cured required projection time by the kinetics of polymerization reaction of photosensitive resin, push away its swellbility distribution required when two dimensional surface according to final required three dimensional structure is counter, so that it is determined that the time of projection every time and the figure of projection.
In the present invention, DLP projector is connected with computer by G code, throws in out specific X-Y scheme to photosensitive resin forerunner's liquid level.Photosensitive resin generation polyreaction at projection and crosslinking curing.Control the single projection time so that under single projection, photosensitive resin polyreaction is incomplete, and crosslinking curing is insufficient, i.e. the conversion ratio of the photosensitive resin under this projection is relatively low with crosslink density.DLP projector carries out reprojection, and at projection, the photosensitive resin of (repeat region of multiple projections pattern) occurs polyreaction further, and monomer conversion is gradually increased with crosslink density.Projection, photocuring operation repeat repeatedly, until polyreaction is complete.The process of multiple projections at least includes two kinds of different graphics (view field of different graphic can be overlapped) so that the two dimensional surface finally given is including at least the region of two kinds of differentiated yields with crosslink density.Being placed in solvent the most swelling by this two dimensional surface, the degree of swelling of zones of different is different, thus produces the stress of local in two dimensional surface, and flexing deformation occurs, and forms three dimensional structure.
In the present invention, step (1) described photosensitive resin precursor liquid comprises monomer and light trigger.
Monomer contains active function groups, can be under light illumination by light trigger initiated polymerization.In monomer, at least a component comprises two or more active function groups, so that polymeric acceptor forms cross-linked structure.
As preferably, described monomer is acrylate monomer or epoxy monomer；
In described acrylate monomer, at least contain two acrylate-based functional groups；
In described epoxy monomer, at least contain two epoxy-functionals.
In described acrylate monomer, including at least a kind of containing two and the most acrylate-based compound；In described epoxy monomer, including at least a kind of containing two and the compound of above epoxy-functional.
The active function groups of described acrylate monomer is acrylate-based, and light trigger trigger monomer carries out Raolical polymerizable.The active function groups of described epoxy monomer is epoxy-functional, and light trigger causes epoxy monomer to carry out cationic polymerization.
As preferably, described acrylate monomer is selected from one or more in polyethyleneglycol diacrylate, ethyleneglycol dimethyacrylate, epoxy acrylic resin, polyurethane acrylic resin, polyester acrylate resin and amino acrylic resin；
Epoxy monomer is one or more in bisphenol-A epoxy, Bisphenol F epoxy, alicyclic epoxy.
Cited acrylate monomer and epoxy monomer all contain two and above active function groups, but all self crosslink.Wherein, epoxy acrylic resin, polyurethane acrylic resin, polyester acrylate resin and amino acrylic resin are prepolymer.
Further preferably, described acrylate monomer is selected from polyethyleneglycol diacrylate and/or ethyleneglycol dimethyacrylate.
For the mechanical property of resin after regulation photosensitive resin precursor liquid viscosity and crosslinking curing, in aforesaid propylene acid ester monomer, in acrylate monomer, also comprise (methyl) acrylate of mono acrylic ester base functional group.
Described (methyl) acrylate comprises an acrylate-based functional group, as preferably, the structural formula of described (methyl) acrylate as shown in Equation 1:
Wherein, R1For methyl or hydrogen, R2Alkyl for 1-20 carbon atom.
Further preferably, one or more during (methyl) acrylate is preferably methyl methacrylate, acrylic acid methyl ester., ethyl methacrylate, ethyl acrylate, butyl methacrylate, butyl acrylate, 2-Propenoic acid, 2-methyl-, octyl ester, 1-Octyl acrylate, methacrylic acid certain herbaceous plants with big flowers ester, acrylic acid certain herbaceous plants with big flowers ester, cyclohexyl methacrylate, cyclohexyl acrylate, isobornyl methacrylate, isobornyl acrylate, hydroxyethyl methylacrylate, 2-(Acryloyloxy)ethanol, Hydroxypropyl methacrylate and Hydroxypropyl acrylate.
(methyl) acrylate of described acrylate-based functional group accounts for the 60-95% of acrylate monomer weight.It is believed that the acrylate of single active function groups accounts for the 60-95% of the heavy amount of acrylate monomer.
Further preferably, (methyl) acrylate of described acrylate-based functional group accounts for the 80-90% of acrylate monomer weight.
Further preferably, described epoxy monomer selected from novolac epoxy resin, diglycidyl ethers of bisphenol-A, bisphenol F diglycidyl ether, tetramethylolmethane four Synthesis of Oligo Ethylene Glycol, tetrabromobisphenol A diglycidyl ether, 1, one or more of 6-hexanediol diglycidyl ether, polymer with bis phenol A ethyleneglycoldiglycidylether, epoxidation polyunsaturated fatty acid and epoxidized vegetable oil.
In above-mentioned epoxy monomer, also comprise the epoxy active diluent (comprising an epoxy-functional) of mono-epoxy-functional.Described epoxy active diluent is the low molecular compound of one epoxy radicals of class band.As preferably, described epoxy active diluent is one or more in butyl glycidyl ether, phenyl glycidyl ether, acrylic glycidyl ether.
Described epoxy active diluent accounts for the 60-95% of epoxy monomer weight.It is believed that the epoxide of single active function groups accounts for the 60-95% of the heavy amount of epoxy monomer.
Further preferably, epoxy active diluent accounts for the 80-90% of epoxy monomer weight.
In step (1), select, according to the difference of polyreaction type (Raolical polymerizable, cationic polymerization), the light trigger adapted.
The light trigger that acrylate monomer uses is free radical photo-initiation；The light trigger that epoxy monomer monomer uses is cation light initiator；Light trigger mass fraction shared by photosensitive resin precursor liquid is 0.1-5%.
Free radical photo-initiation is selected from one or more of benzoin and derivant, benzil class, alkylbenzene ketone, acyl group neighbour's oxide, benzophenone and thioxanthones；One or more in diaryl group iodized salt, triaryl iodine salt, alkyl iodine salt, isopropylbenzene cyclopentadienyl ferrum hexafluorophosphate of cation light initiator.
Further preferably; free radical photo-initiation is selected from Benzoinum, benzoin dimethylether, diphenylethan, dimethoxyphenylacetophenone, hydroxyalkyl phenones, aroyl phosphorous oxides, benzophenone, 2,4-DihydroxyBenzophenone and sulfur for one or more in propoxyl group thioxanthone.
As preferably, described initiator mass fraction shared by photosensitive resin precursor liquid is 0.2-1%.
Photosensitive resin precursor liquid also selectivity described in step (1) comprises the solvent that step (3) uses, and the content of the solvent in photosensitive resin precursor liquid is the 0-80% of solvent gross mass needed for photosensitive resin complete swelling.It is also contemplated that described solvent can add a part (but less than needed for photosensitive resin complete swelling 80% of solvent gross mass) during step (1), the swelling process of step (3) adds remaining part.The solvent comprised in photosensitive resin precursor liquid in step (1), with to make the swelling required solvent of the photosensitive resin after solidification in step (3) consistent, so can improve photocuring effect, additionally, also can accelerate the swelling efficiency of the resin after solidifying.
Needed for photosensitive resin complete swelling, solvent can calculate by retrodicting.
The selection of solvent is adapted to the hydrophilicity of the photosensitive resin that solidification prepares, and step (3) described solvent is inorganic, the organic solvent of the photosensitive resin after the swelling solidification of energy.
Photosensitive resin is hydrophilic compounds, and solvent is selected from water and/or ethanol；
Or photosensitive resin is hydrophobic compound, one or more in the paraffin of ethyl acetate, butyl acetate, dichloromethane, chloroform, benzene, toluene, oxolane, dimethylformamide and thawing of solvent.
The thickness of plane mould can affect projection, curing efficiency.As preferably, described plane die cavity is formed by pad is closely sealed by two parallel sheet glass, and the spacing between two sheet glass is 0.5-5mm.
Spacing between glass is it is also contemplated that photosensitive resin precursor liquid is at the filling thickness of plane mould.
In step (2), use DLP projector the photosensitive resin precursor liquid in step (1) to carry out partial projection, exposes, solidify, the pattern of projection by the cad model transmission of computer-aided design to DLP projector；Step (2) circulation is carried out at least twice, and the pattern of projection every time is different.
The method of the digitized projection technique construction three dimensional structure that the present invention proposes, final three dimensional structure is to be determined with crosslink density by the conversion ratio that two dimensional surface zones of different is different.Its conversion ratio of the region repeatedly exposed by multiple projections is the highest with crosslink density, otherwise the lowest.So the present invention's it is crucial that be fully cured the required time to be divided into some sections by photosensitive resin, the region that every section of time inner projection is different.
The DLP projector of DLP projector commodity in use in the present invention.
The wave band that DLP projector light source sends is 400-700nm, and in step (2), the single projection time is 0.5-5s.In this power and described photosensitive resin precursor liquid coordinated, improve polyreaction efficiency, shorten 3D structure and build the time.
DLP projector is used as the light source in the light source displacement DLP projector of the ultraviolet band less than 400nm.
Compared with prior art, beneficial effects of the present invention is embodied in:
(1) conversion ratio in two dimensional surface and crosslink density distribution are by computer and projector co-controlling, and precision is high, can build the two dimensional surface of Arbitrary distribution in theory, also can finally build the three dimensional structure of arbitrary structures.
(2) building speed fast, the structure of two dimensional surface is less than 30s.
Accompanying drawing explanation
Fig. 1 is digitized projection equipment and device schematic diagram；
Fig. 2 is embodiment 1 two dimensional surface and swelling rear gained three dimensional structure pictorial diagram；
Fig. 3 is embodiment 2 two dimensional surface and swelling rear gained three dimensional structure pictorial diagram；
Fig. 4 is embodiment 3 two dimensional surface and swelling rear gained three dimensional structure pictorial diagram.
Detailed description of the invention
Below in conjunction with embodiment, the present invention will be further described, but the scope of protection of present invention is not limited to the scope that embodiment is expressed.
As it is shown in figure 1, the digitized projection equipment of present invention employing and device include computer 1, DLP projector 2 and plane mould；Plane mould includes that two sheet glass 3 and pad 4, two sheet glass 3 enclose (closely sealed) by pad 4 and become plane die cavity, is filled with photosensitive resin precursor liquid 5 in plane die cavity.
DLP projector 2 is connected with computer 1 by G code, and the pattern of projection is transmitted to DLP projector 2 by the cad model of computer 1 Aided Design；Repeatedly it is projected to photosensitive resin precursor liquid 5 surface by DLP projector 2 local, carries out local, repeatedly solidify.After having solidified, the photosensitive resin (heterogeneous body two dimensional surface) solidification obtained is the most swelling, obtains three dimensional structure.
Embodiment 1 (hydrophilic acrylate's photosensitive resin)
Photosensitive resin precursor liquid raw material:
A) 2-(Acryloyloxy)ethanol (HEA): Sigma-Aldrich company；
B) 3-propyl sulfonic acid metering system acid potassium salt (PSPMA): Sigma-Aldrich company；
C) ethylene glycol bisthioglycolate acrylic acid methyl ester. (EGDMA), Sigma-Aldrich company；
D) double (2,4,6-trimethylbenzoyl) phosphine oxide (Irgacure819) of phenyl:
Sigma-Aldrich company；
By monomer, (mass fraction shared in photosensitive resin precursor liquid of mass fraction HEA:PSPMA:EGDMA=1:0.1:0.01, Irgacure819 is 0.5% by a certain percentage.) mix homogeneously, precursor liquid introduced among the plane mould (thickness 1mm) that two sheet glass are constituted with syringe, then the sample of preparation is being placed in below projector lens at 15cm.
Digitized projection equipment illustrated in Figure 1 and installation drawing is used to be circulated projection, expose and solidify: the wave band that DLP projector light source sends is 400-700nm, the single projection time is 2s, projecting figure is accumulated as following two dimensional surface schematic diagram (see (a) part of Fig. 2) every time, and it is the longest that color represents the most i.e. light application times of projection number of times the most deeply.
Swelling: the two dimensional surface film after projection solidification to be transferred in deionized water so that it is the most swelling, be converted into tomograph (see (b) part of Fig. 2).
Embodiment 2 (epoxy photosensitive resin)
Photosensitive resin precursor liquid raw material:
Polyglycols 2-glycidyl ether resin (DER732): Sigma-Aldrich company；
Ethyl acetate (EA): Chemical Reagent Co., Ltd., Sinopharm Group；
4-isobutyl phenenyl-4-aminomethyl phenyl iodine hexafluorophosphate (Irgacure250): You Yang Science and Technology Ltd.；
By monomer (mass fraction DER732:EA:Irgacure250=1:0.2:0.005) mix homogeneously by a certain percentage, precursor liquid introduced among the plane mould (thickness 1mm) that two sheet glass are constituted with syringe, then the sample of preparation is being placed in below projector lens at 15cm.
The two dimensional surface schematic diagram (see (c) part of Fig. 3) of projection exposure, swelling solvent is ethyl acetate, converts the tomograph (see (d) part of Fig. 3) obtained.
Embodiment 3 (hydrophobic acrylic acid's ester photosensitive resin)
Photosensitive resin precursor liquid raw material:
Butyl acrylate (BA): Sigma-Aldrich company；
Ethylene glycol bisthioglycolate acrylic acid methyl ester. (EGDMA), Sigma-Aldrich company；
Double (2,4,6-trimethylbenzoyl) phosphine oxide (Irgacure819) of phenyl: Sigma-Aldrich company；
By monomer (mass fraction BA:EGDMA:Irgacure819=1:0.01:0.005) mix homogeneously by a certain percentage, precursor liquid introduced among the plane mould (thickness 1mm) that two sheet glass are constituted with syringe, then the sample of preparation is being placed in below projector lens at 15cm.
The two dimensional surface schematic diagram (see (e) part of Fig. 4) of projection exposure.
Swelling:
Two dimensional surface film after projection solidification is transferred in butyl acetate so that it is the most swelling, be converted into tomograph (see (f) part of Fig. 4).
Claims (10)
1. one kind processes the method building three dimensional structure based on digital light, it is characterised in that comprise the steps:
Step (1): the photosensitive resin precursor liquid comprising monomer and light trigger is placed in plane die cavity；
Step (2): use DLP projector, by default two-dimensional pattern, photosensitive resin precursor liquid is carried out repeatedly partial projection, exposure curing；Obtain heterogeneous body two dimensional surface；
Step (3): heterogeneous body two dimensional surface solidification obtained is soaked in solvent swelling, it is thus achieved that 3-D solid structure.
The method processing structure three dimensional structure based on digital light the most according to claim 1, it is characterised in that described monomer is acrylate monomer or epoxy monomer；
In described acrylate monomer, at least contain two acrylate-based functional groups；
In described epoxy monomer, at least contain two epoxy-functionals.
The method processing structure three dimensional structure based on digital light the most according to claim 2, it is characterized in that, one or more in polyethyleneglycol diacrylate, ethyleneglycol dimethyacrylate, epoxy acrylic resin, polyurethane acrylic resin, polyester acrylate resin and amino acrylic resin of described acrylate monomer；
Epoxy monomer is one or more in bisphenol-A epoxy, Bisphenol F epoxy, alicyclic epoxy.
The most according to claim 3 process the method building three dimensional structure based on digital light, it is characterised in that in acrylate monomer, also comprise (methyl) acrylate of mono acrylic ester base functional group；
In epoxy monomer, also comprise the epoxy active diluent of mono-epoxy-functional.
The method processing structure three dimensional structure based on digital light the most according to claim 2, it is characterised in that the light trigger that acrylate monomer uses is free radical photo-initiation；The light trigger that epoxy monomer monomer uses is cation light initiator；Light trigger mass fraction shared by photosensitive resin precursor liquid is 0.1-5%.
The method processing structure three dimensional structure based on digital light the most according to claim 5; it is characterized in that, free radical photo-initiation is selected from one or more of benzoin and derivant, benzil class, alkylbenzene ketone, acyl group neighbour's oxide, benzophenone and thioxanthones；One or more in diaryl group iodized salt, triaryl iodine salt, alkyl iodine salt, isopropylbenzene cyclopentadienyl ferrum hexafluorophosphate of cation light initiator.
The method processing structure three dimensional structure based on digital light the most according to claim 1, it is characterized in that, photosensitive resin precursor liquid also selectivity described in step (1) comprises the solvent that step (3) uses, and the content of the solvent in photosensitive resin precursor liquid is the 0-80% of solvent gross mass needed for photosensitive resin complete swelling.
The method processing structure three dimensional structure based on digital light the most according to claim 1, it is characterised in that described plane die cavity is formed by pad is closely sealed by two parallel sheet glass, and the spacing between two sheet glass is 0.5-5mm.
The method processing structure three dimensional structure based on digital light the most according to claim 1, it is characterised in that in step (2), the single projection time is 0.5-5s.
The method processing structure three dimensional structure based on digital light the most according to claim 1, it is characterised in that photosensitive resin is hydrophilic compounds, solvent is selected from water and/or ethanol；
Or photosensitive resin is hydrophobic compound, one or more in the paraffin of ethyl acetate, butyl acetate, dichloromethane, chloroform, benzene, toluene, oxolane, dimethylformamide and thawing of solvent.
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| US15/486,128 US10239238B2 (en) | 2016-04-15 | 2017-04-12 | Method for fast building three-dimension polymer structures based on digital light patterning |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106696258A (en) * | 2016-11-21 | 2017-05-24 | 浙江大学 | Fast 3D printing method |
| CN110341097A (en) * | 2019-08-05 | 2019-10-18 | 浙江大学 | A kind of thermoplastic polymer and application based on DLP photocuring 3D printing |
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| JP2008066193A (en) * | 2006-09-08 | 2008-03-21 | Nitto Denko Corp | Crosslinked fine porous membrane |
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| CN104890245A (en) * | 2015-04-28 | 2015-09-09 | 北京金达雷科技有限公司 | Photosensitive resin pool, photocuring 3D (three-dimensional) printer using photosensitive resin pool and printing method |
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| JP2008066193A (en) * | 2006-09-08 | 2008-03-21 | Nitto Denko Corp | Crosslinked fine porous membrane |
| JP2010094938A (en) * | 2008-10-20 | 2010-04-30 | Hitachi Ltd | Stereolithography apparatus |
| CN104890245A (en) * | 2015-04-28 | 2015-09-09 | 北京金达雷科技有限公司 | Photosensitive resin pool, photocuring 3D (three-dimensional) printer using photosensitive resin pool and printing method |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106696258A (en) * | 2016-11-21 | 2017-05-24 | 浙江大学 | Fast 3D printing method |
| CN106696258B (en) * | 2016-11-21 | 2019-09-03 | 浙江大学 | A kind of method of quick 3D printing |
| CN110341097A (en) * | 2019-08-05 | 2019-10-18 | 浙江大学 | A kind of thermoplastic polymer and application based on DLP photocuring 3D printing |
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