CN109030478A - Liquid crystal plural gel, preparation method and applications and stink damp body detecting method - Google Patents
Liquid crystal plural gel, preparation method and applications and stink damp body detecting method Download PDFInfo
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- CN109030478A CN109030478A CN201810825160.8A CN201810825160A CN109030478A CN 109030478 A CN109030478 A CN 109030478A CN 201810825160 A CN201810825160 A CN 201810825160A CN 109030478 A CN109030478 A CN 109030478A
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Abstract
The invention discloses a kind of liquid crystal plural gel, preparation method and applications and stink damp body detecting methods, the liquid crystal plural gel includes smectic liquid crystal polymer network and hydrogen sulfide sensitive material, the smectic liquid crystal polymer network is formed by curing under ultraviolet light by reactant feed, and the reactant feed includes smectic liquid crystal monomer, crosslinking agent, photoinitiator and polymerization inhibitor.Gas sensitive material in inventive gel contacts the variation that can cause liquid crystal plural gel physicochemical property with target gas molecules, to realize the detection of gas molecule, the preparation method of liquid crystal plural gel provided by the invention can accurately control the shape that product is prepared, thickness and flatness, so that the detection performance for the liquid crystal plural gel being prepared is more preferable, in hydrogen sulfide gas detection with good application prospect.
Description
Technical field
The present invention relates to macromolecule plural gels, more particularly, to a kind of liquid crystal plural gel, preparation method and applications
With stink damp body detecting method.
Background technique
Hydrogen sulfide (H2S) gas molecule is made of two hydrogen atoms and a sulphur atom, is colourless, hypertoxic, sour gas
Body has rotten-egg odour, alias hydrosulphuric acid, and specific gravity is 1.19 times of air, can be dissolved in water, solubility is dropped with increasing for water temperature
It is low.Inflammable in air, when burning, issues blue flame, and generates to the harmful sulfur dioxide gas of eyes and lung.Vulcanization
Hydrogen (H2S) exist under normal conditions with gaseous state, when it is mixed into certain proportion (4.3%~46%) with air or oxygen with regard to shape
At a kind of explosive mixture, meet hot fried.Hydrogen sulfide (H2S some chemical reactions for) being mainly derived from nature and organic
The natural decomposition process of body and certain natural materials, such as natural gas, the ingredient or impurity of crude oil etc. are normally present in multiple
In the biological decomposition of production process and nature, for example, mining, refine copper, nickel, cobalt etc. (especially sulphide ore), coal it is low
Warm coking, the exploitation and refinement of sulfur-bearing oil；Rubber, artificial silk, tanning, sulfur dye, pigment, beet sugar manufacture, animal glue etc.
Industrial production excavates regulation marshland, irrigation canals and ditches, well, sewer, tunnel, and removes rubbish, the operations such as dirt, excrement；It
Right hot spring and volcanic eruption are also commonly present.Hydrogen sulfide (H2S) can be by respiratory tract quickly by pulmonary absorption, and then influence
Human health.Pathological research shows hydrogen sulfide (H2S intake and transport of the human body to oxygen) can directly be interfered.To cause
Intracellular respiratory enzyme loses vigor, and causes cell hypoxia death by suffocation, the toxicity of hydrogen sulfide is very strong, and the absolute lethal concentration of people is
1000mg/m3.People are made poisoning symptom, the work-yard in China occur when the concentration of hydrogen sulfide in air is 10~15ppm
Environment maximum acceptable concentration is 10ppm.Caused by hydrogen sulfide poisoning is mainly sucked as respiratory tract, but for long-term low concentration
Environment in, skin also can absorption hydrogen sulfide slowly and cause to be poisoned.General no sequel of calomel poisoning, several times slightly
Poisoner leaves obstinate sequelae, such as serious neurasthenia, acutely obstinate headache, serious insomnia, memory function
Obstacle occurs, or even dysnoesia occurs.Therefore, for the hydrogen sulfide (H in air2S) detection of pollutant is for preventing sulphur
Change hydrogen (H2S harm) keeps safety in production, the harmonious development of human and environment is kept to have great significance.
Secondly, hydrogen sulfide (H2It S) is that the third endogenous gas letter is proved to be after nitric oxide and carbon monoxide
Number molecule, all plays important in many physiology courses such as vascularization, vasodilation, nerve modulation, natural death of cerebral cells, inflammation
Effect.Studies have shown that H in breathing gas2The content of S has apparent related to many respiratory diseases (such as lung cancer)
Property.Traditional gas detection and analysis method, such as gas chromatography-mass spectrography and spectroscopic methodology (fluorescence, ultraviolet, laser, Raman)
Deng, have accuracy high, detection limits low advantage, but to the more demanding of chemical analysis instrument, detecting step and complicated for operation,
It takes a long time, it is difficult to achieve the effect that quick diagnosis and treatment in clinical medicine.In clinical medicine, the time is often diagnosing and treating disease
Therefore how the key point of disease efficiently carries out the emphasis that detection is research to characteristics of contaminated respiratory droplets gas.
Modern breast rail starts from the 1970s, and American scientist Linus Pauling et al. uses gas chromatography
Come analyze people exhalation gas, quantitatively determined about 250 kinds of gas componants, mainly include nitrogen, oxygen, carbon dioxide, water
The common gas such as steam and inert gas and fraction endogenous volatile organic matter, ethane, pentane, acetone, isoprene
Deng.With the development of modern medicine, by the research of the pathogenesis of biochemical process and disease to body metabolism, effectively
Illustrate that certain gas componants of patient's exhalation are really related with the disease in terms of body.2016, Morad K.Nakhleh etc.
People studies lung cancer, the exhaled gas of the patient of 17 kinds of diseases such as colon cancer, finds each disease all for there is it
Unique " breathing fingerprint ", this allows for becoming auxiliary traditional clinical by the gas componant of analysis people's exhalation to diagnose the illness
A kind of feasible method of diagnosis and treatment.Currently, for hydrogen sulfide (H2S) microsensor detected mainly has metal oxide semiconductor
Sensor, electrochemical sensor, optical sensor, conductive polymer sensors, differential quartz balance and ultrasonic surface line
Analyte sensors etc..These are based on metal oxide, electrode, and the gas sensor of semiconductor has small in size, light, low energy
Consumption, detection time is short, the low feature of Monitoring lower-cut, but due to the limitation of material nature, especially inorganic material, these
Gas sensor still has many deficiencies, and such as flexible low, printing difficulty is big, and processing price is high, for the sensitive of gas response
Degree and specificity are low, easily affected by environment.
Summary of the invention
To solve the deficiencies in the prior art, the object of the present invention is to provide a kind of liquid crystal plural gel, preparation method and its
Using with stink damp body detecting method.
The technical solution used in the present invention is:
The present invention provides a kind of liquid crystal plural gel, including smectic liquid crystal polymer network and hydrogen sulfide sensitive material,
The smectic liquid crystal polymer network is formed by curing under ultraviolet light by reactant feed, and the reactant feed includes smectic
Phase liquid crystal monomer, crosslinking agent, photoinitiator and polymerization inhibitor.
It preferably, further include hydrogen sulfide molecule channel, the hydrogen sulfide molecule channel is to the hydrogen sulfide gas molecule that circulates.
The internal cavities size in hydrogen sulfide molecule channel should be slightly bigger than specific solute (the hydrogen sulfide gas molecule of target detection), can pass through
The hydrogen sulfide molecule channel with different internal cavities sizes is selected to realize that the selectivity of gas molecule penetrates.Hydrogen sulfide molecule
The internal cavities size in channel is greater than hydrone size and is conducive to passing through for hydrone, and the diffusion couple that can use aqueous solution is specific
Solute (the hydrogen sulfide gas molecule of target detection) is selected.
Further, the hydrogen sulfide molecule channel is the nanostructure with intramolecular aquaporin.
Further, the hydrogen sulfide molecule channel include but is not limited to column aromatic hydrocarbons, carbon nanotube, in calixarenes extremely
Few one kind.
Preferably, the hydrogen sulfide molecule channel is dispersed in the inside of the smectic liquid crystal polymer network.
Preferably, the hydrogen sulfide sensitive material includes but is not limited to methylene blue, cystamine, at least one in cysteamine
Kind.The preferred bio-medical reagent of hydrogen sulfide sensitive material.
Preferably, smectic liquid crystal monomer in the reactant feed: crosslinking agent: photoinitiator: the mass ratio of polymerization inhibitor
For (80~90): (10~15): (1.5~2): (0.005~0.01).
In some preferred embodiments, the smectic liquid crystal monomer is 4- (6- (acryloxy) hexyloxy) benzene first
Acid, the crosslinking agent are that Isosorbide-5-Nitrae-phenylene-is bis- (4- (6- (acryloxy) hexyloxy) benzoic acid), and the photoinitiator is benzene
Bis- (2,4, the 6- trimethylbenzoyl) phosphine oxides of base, the polymerization inhibitor are hydroquinone.
The present invention also provides a kind of preparation methods of above-mentioned liquid crystal plural gel, comprising the following steps: S1, takes liquid crystal
Box, the liquid crystal cell include the transparent substrates one and transparent substrates two being oppositely arranged, the transparent substrates one and the light transmission base
The opposite one side of plate two has carried out silanization treatment, and the transparent substrates two one side opposite with the transparent substrates one is coated with
Oriented layer；S2, smectic liquid crystal monomer, crosslinking agent, photoinitiator, polymerization inhibitor and optional hydrogen sulfide molecule channel are taken, be dissolved in
In organic solvent, heating stirring obtains liquid crystal compound, and the liquid crystal compound is filled into the liquid crystal cell；S3, utilization
Liquid crystal cell described in ultraviolet light, the liquid crystal compound are formed by curing smectic liquid crystal thin polymer film；S4, to the smectic
Phase liquid crystal polymer film carries out deprotonation processing, and adsorption of hydrogen sulfide sensitive material obtains liquid crystal plural gel.
The smectic liquid crystal thin polymer film being formed by curing through ultraviolet light is the layer structure of rule, gas molecule channel
It is slightly larger or slightly smaller when external dimensions is suitable with the thickness of liquid crystal polymer film, be conducive to (the vulcanization of target detection of specific solute
Hydrogen molecule) directly through the interlayer for arranging close liquid crystal polymer film arrival film.
Preferably, in step S1 liquid crystal cell preparation step specifically: transparent substrates one and transparent substrates two are taken, to described
Transparent substrates one carry out silanization treatment, the transparent substrates two surface coat oriented layer, by the transparent substrates one into
Row silanization treatment with the transparent substrates two coating oriented layer while be oppositely arranged, encapsulation preparation form liquid crystal
Box.
Preferably, the smectic liquid crystal thin polymer film formed in step S3 with a thickness of 15 μm~120 μm.
Preferably, deprotonation processing is carried out to the liquid crystal polymer film using lye in step S4.
Preferably, reagent used in silanization treatment is dimethyldichlorosilane in step S1.
Preferably, oriented layer is vertically oriented layer in step S1.
Application of the above-mentioned liquid crystal plural gel in hydrogen sulfide gas detection.
The present invention provides a kind of detection method of hydrogen sulfide gas, comprising the following steps: hydrogen sulfide gas is passed through right
It is required that in the described in any item liquid crystal plural gels of 1-6；Detect the physically and/or chemically characteristic parameter of the liquid crystal plural gel
Variation.
The beneficial effects of the present invention are:
Liquid crystal plural gel provided by the invention is the smectic phase self assembly layer structure of liquid crystal polymer cross-linked network.It
It is to gradually form specific smectic phase layered liquid crystal configuration in conjunction with the interaction between liquid crystal molecule, compared with the method for LBL self-assembly
It is more easy, there is better structural stability and regularity, and layer and layer are removable.After ultraviolet light solidifies, liquid in layer
The crosslinking of brilliant molecule will further enhance the intensity of this liquid crystal polymer gel film.Wherein, interlayer liquid crystal molecule can also shape
At hydrogen bond, after deprotonation is handled interlayer hydrogen bond be destroyed to form electronegative cavity structure, electrostatic phase can be passed through
Electropositive gas sensitive material is adsorbed onto liquid crystal plural gel by interaction.The layer structure is also to cause liquid crystal compound solidifying
The basis of the variation of the photoelectric properties such as glue expansion rate of water absorption and electric conductivity, while liquid crystal plural gel is maintained inside generation
The stability of structure after physical and chemical properties change.
For example multi-layer coated compared to customary preparation methods, the present invention uses the system that liquid crystal plural gel is prepared in liquid crystal cell
Standby mode can accurately control shape, thickness and the surface smoothness of film, avoid customary preparation methods meeting in application
The defect for causing unstable factor improves the detection sensitivity for the liquid crystal plural gel being prepared.
In addition, transparent substrates surface more inertia can be made using silanization treatment in the present invention, with liquid crystal polymer film
Adhesion strength substantially reduce, the bad liquid crystal polymer film prepared is drawn when can effectively avoid removal transparent substrates, while again not
Influence the preparation of liquid crystal plural gel.
Detailed description of the invention
Fig. 1 a is differential scanning calorimetry (DSC) curve before liquid crystal polymer network is formed；
Fig. 1 b is differential scanning calorimetry (DSC) curve after liquid crystal polymer network is formed；
Fig. 2 a is petrographic microscope (POM) picture before liquid crystal polymer network is formed；
Fig. 2 b is petrographic microscope (POM) picture after liquid crystal polymer network is formed；
Fig. 3 is infrared spectroscopy (FT-IR) figure that liquid crystal polymer network forms front and back；
Fig. 4 a is liquid crystal plural gel and hydrogen sulfide (H2S) the picture before gas interaction；
Fig. 4 b is the picture after liquid crystal plural gel and the interaction of hydrogen sulfide (H2S) gas；
Fig. 5 is the water absorption rate curve of liquid crystal plural gel；
Fig. 6 is color change picture after the liquid crystal plural gel adsorption of hydrogen sulfide containing methylene blue.
Specific embodiment
It is clearly and completely described below with reference to technical effect of the embodiment to design and generation of the invention, with
It is completely understood by the purpose of the present invention, feature and effect.Obviously, described embodiment is that a part of the invention is implemented
Example, rather than whole embodiments, based on the embodiment of the present invention, those skilled in the art is not before making the creative labor
Other embodiments obtained are put, the scope of protection of the invention is belonged to.
Embodiment 1
Smectic liquid crystal polymer network is prepared using following steps: (1) preparing two pieces of transparent substrates, select in the present embodiment
It is baseplate material with glass；(2) liquid crystal monomer, photoinitiator, polymerization inhibitor are taken respectively according to each component mass parts shown in table 1,
It is dissolved in organic solvent dichloromethane, is heated one hour under the action of magnetic agitation in 60 DEG C~70 DEG C, it is mixed to obtain liquid crystal
Close object；(3) methanol solution that one of glass baseplate is soaked in 6wt% carries out silanization treatment to substrate surface, will
The polyvinyl alcohol water solution spin-coating of 5wt% carries out in vacuum desiccator in another clean glass substrate surface
It is dried, friction groove, prepares vertically oriented layer；(4) by two pieces of transparent substrates silanization treatments and equipped with oriented layer
Surface is oppositely arranged, and solidifies 40s-60s under action of ultraviolet light with the ultraviolet cured adhesive for being mixed with liner, by two pieces of light transmission bases
Plate encapsulation is prepared into liquid crystal cell, and the space thickness controlled in the regulatory region for encapsulating formation between two pieces of transparent substrates of liquid crystal cell is uniform
Unanimously, the space thickness range in regulatory region is 15 μm -120 μm, in the present embodiment, with a thickness of 70 μm；(5) in 90 in thermal station
Liquid crystal compound is filled into the liquid crystal cell prepared by principle through capillary action at DEG C -95 DEG C, it is to be filled completely after,
100 DEG C of -105 DEG C of orientation 30min-60min are warming up to, and keep the temperature prepolymerization 30min-60min；It (6) will be populated
Liquid crystal cell light initiation polymerization 200-400s is carried out under ultraviolet light, then at 120-140 DEG C of heat cure 10-30min, be formed by curing
Liquid crystal polymer network, the thickness of the liquid crystal polymer film are the space thickness in the regulatory region of liquid crystal cell, obtain liquid
Crystalline polymer network.
The thermodynamic property (DSC) of front and back, optical property (POM) are formed to the liquid crystal polymer network being prepared
It is characterized respectively, and analyzes the infrared spectroscopy (FT-IR) that liquid crystal polymer network forms front and back, experimental result such as Fig. 1-3 institute
Show.For DSC result as shown in Figure 1, wherein Fig. 1 a is the DSC curve before liquid crystal compound polymerization, Fig. 1 b is liquid crystal compound polymerization
The DSC curve of liquid crystal polymer network is formed afterwards, the results showed that liquid crystal monomer has apparent decalescence peak at 87C ° or so,
The peak is moved back to 182.8C ° after polymerization crosslinking, as a result illustrates that the formation of polymerization crosslinking post-consumer polymer reticular structure has conducive to material
Stabilization, but also phase transformation needs higher energy.POM result is as shown in Fig. 2, wherein Fig. 2 a is before liquid crystal compound polymerize
POM picture, Fig. 2 b are the POM picture of formation liquid crystal polymer network after liquid crystal compound polymerization, the results showed that liquid crystal polymer
Network formed before at normal temperature in smectic phase, 95C ° takes place phase transformation, until the complete blackening under polarisation, be changed into it is each to
The same sex；There is wide temperature range and preferable stability after polymerization film formation.The FT- of liquid crystal polymer network is formed before and after photopolymerization
IR result such as Fig. 3 shows that wherein the carbon-carbon double bond infrared signature peak after polymerization crosslinking on the liquid crystal monomer molecule disappears, explanation
The formation of polymer network structure.
The constitutive material of the liquid crystal compound of 1 embodiment 1 of table
Liquid crystal polymer network structure in the present embodiment is smectic phase layer structure, and smectic phase is a kind of self assembly stratiform
Structure, compound with regular structure, property is stablized, but can slide between layers, and interlayer molecule can flow freely, molecule in binder course
The cross-layer for being advantageous to target molecule is permeated and is transported by channel, has higher selectivity and better permeability, this is
What other layer structures were difficult to realize, be conducive to form effective gas detection site in its interlayer.
Embodiment 2
The present embodiment provides a kind of liquid crystal plural gel the following steps are included: (1-6) is according to the step (1- in embodiment 1
6) liquid crystal polymer film is prepared；(7) after the completion of by step (6) described in embodiment 1, by liquid crystal polymer film from liquid crystal cell
Middle taking-up cuts into 1cm × 1cm specification, carries out deprotonation processing using the NaOH lye of 0.1M-0.5M；(8) by deprotonation
Liquid crystal polymer film after the completion of change cleans up, and is soaked in the methylene blue solution of 10 μ g/mL-20 μ g/mL to saturation
Absorption, obtains liquid crystal plural gel.
Hydrogen sulfide (H prepared by laboratory2S) gas be passed through above-mentioned saturation adsorbed methylene blue liquid crystal it is compound solidifying
Glue is observed and is detected the variation before gel adsorption hydrogen sulfide gas (see Fig. 4 a) and after adsorption of hydrogen sulfide gas (see Fig. 4 b), says
Bright hydrogen sulfide (H2S) redox reaction occurs for gas and the gas sensitization molecule of the Electrostatic Absorption, so that liquid crystal polymer
Film lighter.The water absorption rate of the deprotonation being prepared treated liquid crystal plural gel is characterized, as a result such as
Shown in Fig. 5, the experimental results showed that the liquid crystal plural gel water absorption rate with higher.
Present embodiments provide a kind of hydrogen sulfide (H2S) the liquid crystal plural gel of specific detection, including liquid crystal polymer
Network is in smectic phase, is regular interlayer knot with the gas sensitive material sensitive to hydrogen sulfide gas, the liquid crystal polymer network
Structure, interlayer liquid crystal molecule form hydrogen bond, and interlayer hydrogen bond is destroyed after alkali process, forms electronegative cavity structure.To sulphur
There are Electrostatic Absorption works between electropositive molecule, with electronegative cavity structure for the gas sensitive material of change hydrogen sensitivity
With, and then entered in liquid crystal polymer network by electrostatic interaction.By be supported in liquid crystal polymer to vulcanization
The redox reaction that the gas sensitive material and hydrogen sulfide molecule of hydrogen sensitivity occur, causes liquid crystal polymer film
The variation of color, and then realize the visibility test to hydrogen sulfide gas.
Embodiment 3
The present embodiment provides a kind of liquid crystal plural gels, and preparation step is same as Example 2, the difference is that: it is described
The constitutive material of liquid crystal compound is as shown in table 2 in step (2).
The constitutive material of the liquid crystal compound of 2 embodiment 3 of table
Liquid crystal polymer network structure in the present embodiment is joined on the basis of embodiment 1 as gas molecule channel
Column [5] aromatic hydrocarbons of material, structure is still smectic phase layer structure, equally has compound with regular structure, the stable feature of property.With
Liquid crystal film without gas molecule channel is similar, can slide between layers, and interlayer molecule can flow freely, in binder course
The cross-layer for being advantageous to target molecule is permeated and is transported by molecular channel, has higher selectivity and better permeability；
Secondly, the addition in gas molecule channel, is more advantageous to and forms effective gas detection site in its interlayer, improve liquid crystal film
Gas detection efficiency.
Hydrogen sulfide molecule channel provided in this embodiment is embedded in the liquid crystal plural gel, for the sulphur to be detected that circulates
Change hydrogen molecule.On the one hand, molecules align is fine and close in smectic liquid crystal layer, and complete tight allows other molecule cross-layers saturating
It crosses, can only slowly be penetrated by bedding void, the introducing in hydrogen sulfide molecule channel will undoubtedly greatly improve gas molecule solidifying
Air flux in glue, especially Vertical Flux, and then detection efficiency is improved, reduce Monitoring lower-cut.On the other hand, have by selection
The specificity for having the hydrogen sulfide molecule channel of specific internal cavity size that hydrogen sulfide gas molecule may be implemented passes through, attached gel
In hydrogen sulfide sensitive material realize hydrogen sulfide specific detection.Caused gel physical and chemical properties change therebetween, as absorbance,
The variation of the photoelectric properties such as expansion rate of water absorption and electric conductivity can accurately demarcate the infiltration concentration of under test gas molecule, into
And realize the detection of hydrogen sulfide molecule.
Embodiment 4
The liquid crystal plural gel being prepared in Example 3, hydrogen sulfide (H prepared by laboratory2S) gas is passed through
The liquid crystal plural gel that saturation has adsorbed the molecular channel containing gas of methylene blue is stated, observes and detects gel adsorption stink damp
The change procedure of body, as shown in fig. 6, liquid crystal plural gel color illustrates hydrogen sulfide (H by edge to center gradually fading2S) gas
Redox reaction gradually occurs for body and the gas sensitization molecule of the Electrostatic Absorption, so that liquid crystal polymer film color becomes
Shallowly, the realization time of whole process was less than 10 minutes.
One kind is present embodiments provided in hydrogen sulfide (H2S what is) optimized on the basis of the liquid crystal plural gel of specific detection contains
The liquid crystal plural gel in gas molecule channel, composition include liquid crystal polymer network, the gas being embedded in polymer network
Molecular channel prepares poly- with the gas sensitive material sensitive to hydrogen sulfide gas, the liquid crystal polymer network and embodiment 1
It closes species seemingly, is equally in smectic phase, is regular interlayer structure, interlayer liquid crystal molecule forms hydrogen bond, the interlayer hydrogen after alkali process
Key is destroyed, and forms electronegative cavity structure.And be electropositive molecule to the sensitive gas sensitive material of hydrogen sulfide gas, with
There are electrostatic adsorptions between electronegative cavity structure, and then enter liquid crystal polymer network by electrostatic interaction
In.Particularly, since gas molecule channel is embedded in liquid crystal polymer network, thus it can further improve gas molecule solidifying
Air flux in glue, and then improve detection efficiency, reduce Monitoring lower-cut.
Claims (10)
1. a kind of liquid crystal plural gel, which is characterized in that including smectic liquid crystal polymer network and hydrogen sulfide sensitive material, institute
It states smectic liquid crystal polymer network and is formed by curing under ultraviolet light by reactant feed, the reactant feed includes smectic phase
Liquid crystal monomer, crosslinking agent, photoinitiator and polymerization inhibitor.
2. liquid crystal plural gel according to claim 1, which is characterized in that further include hydrogen sulfide molecule channel, the sulphur
Change hydrogen molecule channel to the hydrogen sulfide gas molecule that circulates.
3. liquid crystal plural gel according to claim 2, which is characterized in that the hydrogen sulfide molecule channel is with molecule
The nanostructure of interior aquaporin.
4. liquid crystal plural gel according to claim 3, which is characterized in that the hydrogen sulfide molecule channel includes column virtue
At least one of hydrocarbon, carbon nanotube, calixarenes.
5. according to the described in any item liquid crystal plural gels of claim 2-4, which is characterized in that the hydrogen sulfide molecule channel point
It is dispersed in the inside of the smectic liquid crystal polymer network.
6. liquid crystal plural gel according to claim 1-4, which is characterized in that the hydrogen sulfide sensitive material packet
Include at least one of methylene blue, cystamine, cysteamine.
7. the preparation method of liquid crystal plural gel described in any one of claims 1-6, which comprises the following steps:
S1, liquid crystal cell is taken, the liquid crystal cell includes the transparent substrates one and transparent substrates two being oppositely arranged, the transparent substrates one
The one side opposite with the transparent substrates two has carried out silanization treatment, and the transparent substrates two are opposite with the transparent substrates one
One side be coated with oriented layer；
S2, smectic liquid crystal monomer, crosslinking agent, photoinitiator, polymerization inhibitor and optional hydrogen sulfide molecule channel are taken, be dissolved in organic
In solvent, heating stirring obtains liquid crystal compound, and the liquid crystal compound is filled into the liquid crystal cell；
S3, using liquid crystal cell described in ultraviolet light, the liquid crystal compound is formed by curing smectic liquid crystal thin polymer film；
S4, deprotonation processing is carried out to the smectic liquid crystal thin polymer film, adsorption of hydrogen sulfide sensitive material obtains liquid crystal
Plural gel.
8. the preparation method of liquid crystal plural gel according to claim 7, which is characterized in that the smectic formed in step S3
Phase liquid crystal polymer film with a thickness of 15 μm~120 μm.
9. application of the liquid crystal plural gel described in any one of claims 1-6 in hydrogen sulfide gas detection.
10. a kind of detection method of hydrogen sulfide gas, which comprises the following steps:
Hydrogen sulfide gas is passed through in liquid crystal plural gel described in any one of claims 1-6；
Detect the variation of the physically and/or chemically characteristic parameter of the liquid crystal plural gel.
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