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Stripping, functional modification of dichalcogen compounds and preparation method of intelligent composite gel

A compound and dichalcogen technology, applied in the direction of binary selenium/telluride compounds, metal selenide/telluride, tungsten compounds, etc., can solve the problem of preparing transition metal dichalcogen compound composite materials, functional modification reports are very few, There are no problems such as functionality, and the effect of simple preparation conditions, broad industrial application prospects, and convenient operation process is achieved.

Inactive Publication Date: 2017-11-17
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, there are few reports on the method of stripping transition metal dichalcogenides in aqueous phase. In 2011, "Advanced Materials" (Adv. Mater. 2011, 23, 3944–3948) reported a method of stripping transition metal dichalcogenides with aqueous solution of sodium cholate surfactant. The method of two-dimensional sheet materials has subsequently caused some related research. In 2013, "American Chemical Society Applied Materials and Their Interface Properties" (ACS Appl. Aqueous solution of ethylene oxide-polypropylene oxide-polyethylene oxide triblock copolymer) surfactant strips molybdenum disulfide to prepare its nanosheet method, 2015 "Journal of American Chemical Society" (J. Am . Chem. Soc. 2015, 137, 6152−6155) reported a method of stripping molybdenum disulfide with an aqueous bovine serum albumin solution, and in 2015 "Nanoscale" (Nanoscale, 2015, 7 , 9919–9926) reported the use of an aqueous lignin solution The method of stripping molybdenum disulfide, however, most of the stripping aids used in the water-phase stripping of molybdenum disulfide are amphiphilic polymers or small molecule surfactants, which have almost no functionality, so it is difficult to further prepare functionalized molybdenum disulfide. Transition metal dichalcogenide composite materials, and in the field of liquid phase exfoliation research, people are mainly concerned about its exfoliation problem, and there are few reports on further functional modification

Method used

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  • Stripping, functional modification of dichalcogen compounds and preparation method of intelligent composite gel
  • Stripping, functional modification of dichalcogen compounds and preparation method of intelligent composite gel
  • Stripping, functional modification of dichalcogen compounds and preparation method of intelligent composite gel

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Experimental program
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Effect test

Embodiment 1

[0022] Dissolve 0.84 g of N-isopropylacrylamide monomer and 0.36 g of vinylimidazole monomer in 50 mL of deionized water, then add 0.2 g of n-bromobutane and 0.054 g of azobisisobutylamidine hydrochloride, Heat and stir at 70°C for 4 hours to obtain a copolymer of polyvinylimidazole ionic liquid and N-isopropylacrylamide, and the polymer after dialysis is made into an aqueous solution with a concentration of about 2 wt%, which is used for ultrasonic stripping of molybdenum diselenide powder8 hours, to obtain an aqueous solution of polymer-modified molybdenum diselenide nanosheets, after centrifugation, the supernatant was taken, and 0.2 g of dibromobutane was added and heated at 70°C for 6 hours to obtain a composite gel.

[0023] From figure 1 The NMR spectrum shows that the copolymer of polyvinylimidazole ionic liquid and N-isopropylacrylamide has been successfully prepared.

[0024] From figure 2 It can be seen in the figure that the lattice spacing of the exfoliated mol...

Embodiment 2

[0030]Dissolve 0.84 g of N-isopropylacrylamide monomer and 0.72 g of vinylimidazole monomer in 50 mL of deionized water, then add 0.4 g of n-bromobutane and 0.054 g of azobisisobutylamidine hydrochloride, Heat and stir at 70°C for 4 hours to obtain a copolymer of polyvinylimidazole ionic liquid and N-isopropylacrylamide, and the polymer after dialysis is made into an aqueous solution with a concentration of about 2 wt%, which is used for ultrasonic stripping of molybdenum diselenide powder8 hours, to obtain an aqueous solution of polymer-modified molybdenum diselenide nanosheets, after centrifugation, the supernatant was taken, and 0.2 g of dibromobutane was added and heated at 70°C for 6 hours to obtain a composite gel.

Embodiment 3

[0032] Dissolve 0.84 g of N-isopropylacrylamide monomer and 1.44 g of vinylimidazole monomer in 50 mL of deionized water, then add 0.8 g of n-bromobutane and 0.054 g of azobisisobutylamidine hydrochloride, Heat and stir at 70°C for 4 hours to obtain a copolymer of polyvinylimidazole ionic liquid and N-isopropylacrylamide, and the polymer after dialysis is made into an aqueous solution with a concentration of about 1 wt%, which is used for ultrasonic stripping of molybdenum diselenide powder5 hours, to obtain an aqueous solution of polymer-modified molybdenum diselenide nanosheets, after centrifugation, the supernatant was taken, and 0.2 g of dibromobutane was added and heated at 60° C. for 7 hours to obtain a composite gel.

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Abstract

The invention belongs to the technical field of functional materials and particularly relates to a preparation method of stripping, functional modification and dual response intelligent composite gel of transition metal disulfide. A temperature-sensitive functional poly ionic liquid aqueous solution is used for ultrasonic stripping of transition metal disulfide powder, so that a nano layer laminated aqueous solution of the transition metal disulfide modified by polymer can be obtained directly; then a cross-linking agent is added so that intelligent gel with temperature and near-infrared dual response can be further prepared, and the intelligent gel can be taken as a shape memory material and an optothermal response intelligent gel material. The method is easy and convenient to operate, the production cost is low, batch production is easy, the prepared intelligent composite gel has multiple stimuli response, and the method can be applied widely and has large scale preparation potential and wide commercial application prospect.

Description

technical field [0001] The invention belongs to the technical field of functional materials, and in particular relates to a method for stripping transition metal dichalcogenides, functional modification and double response intelligent composite gel. Background technique [0002] In recent years, with the upsurge of research on two-dimensional layered nanomaterials such as graphene, other new two-dimensional layered compounds with graphene-like structures have also attracted researchers in many fields such as physics, chemistry, materials, electronics, and biomedicine. broad interests. In particular, nanosheets of transition metal dichalcogenides have received more and more attention due to their special properties in thermal, electrical, optical, mechanical and other aspects and their potential applications in optoelectronic devices and biomedical fields. In addition, In order to further expand its application prospects and take into account practical production application...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B19/04C01G39/06C01G41/00
CPCC01B19/007C01G39/06C01G41/00C01P2004/04
Inventor 雷周玥武培怡
Owner FUDAN UNIV
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