Study On The Preparation, Structure And Properties Of Inorganic Nano-particle/Tussah Fibroin Composite Fims

Recently,more and more attention has been paid to natural silk, which is produced by a wide variety of insects, such as silkworms.About the silkworm vomitting mechanism and the preparation of regenerated-tussah silk, domestic and international have a lot of reports, but about tussah, especially the report of tussah in Liao-ning north is seldom seed. Using the tradition certainly solution of concertration and mix the solution of n(cacl2):n(C2H5OH):n(H2O)=1:2:8 couldn't make the tussah silk dissolved completely. In the second chapters, we groped out and prepared certainly silk of regenerated tussah of concertration method of solution of regenerated-tussah silk and studied the properties of its flowing and changing, studied the change of model proposed under the use of shear and the influence to the conformation transition of regenerated-tussah silk using under the metal ions, the results is following:(1)The flowing and changing properties of regenerated-tussah silk is very difference to flowing and changing of nature of convention solution of thing getting together.Under the same concentration,the more shear, the more order arrange along the shear direction of function to the molecule of regenerated-tussah silk; Under the same shear, the more concentration of regenrated-tussah silk,the more structure transform of optics every the same nature face to the optics every face the opposite nature.(2)In the wake of Ca2+ concertration dialysis solution, the critical shearing is lower to the regenerated-tussah silk in the wake of pure water and running water dialysis, this indicate that Ca+ can promote theβsubdued crystalizing.(3)In seek for the process of mechanism of silkworm vomitting, scientific worker did a lot of studys and works, we think that the more and more fine the front silk gland of silkworm peculior and the change of shear in the vomitting silk pipe and the silkworm contained metal ions (Ca2+,K+ et al) are the main reasons of silk melting happened,so forming the properties out-standing silk. These problems were proded and solved, we can further knownledge the silkworm vomitting mechanism. More important one is for multipurpose use to open up tussah silk and openning up products of new brand of tussah and supplied the forceful theory follow.Silk of tussah is natural fibre, having the yellow of natural milk and the fibre is thick and the elasticity is good, its textiles are fullthe, style is boorish and gorgeous, taking the comfort, but its easily wrinkle, easily float yellow and the more lower weakness of function are restricted to its uses.Domestic and international researchers have did a lot of work in changing the nature on the regenerated silk fibroin, they mainly adopt the method of mix together in fibroin and Joined the other organics material and inorganics in the films, improvedthe silk properties;a lot of scholars used the fibroin film for the textiles putting in order, for raising the product of textiles calss and taking the properties, they supplied the new way and gained the gratifying effect. As the fibroin its special characteristic, textile class exist some less than in rate of dyeing and prison of colour, how improving these special characteristics have arroused textile worker's attention. Nano materials have the excellent properties, the suitable nano particle can strengthen the material's particularity in one certain respect.In third chapters, we used the function of vibration of ultrasonic wave and disperse and joined TiO2 directly into the fibroin solution.,through controling nano-TiO2 and fibroin propertion and pH, it can controled growing of nano-TiO2, we prepared a series tussah fibroin composite fime of containing nano-TiO2 The nature holdiing each other of fibroin and TiO2 particle and the structure of fibroin after joined nano-TiO2 decided the properties of fibroin composite fime. We tested and analysised the composite fime through SEM,DSC,XRD,IR,TG, the results showed that joined nano-TiO2 appropriatly, it can even disperse fibroin solution; the Tm of composite fime is higher than pure fibroin fime; Heat stability of the composite fime is raised; Structure crystalizes of composite fime is changed from silkⅠto silkⅡ;The tests of Inflexible properties indicated that the intensity of breaken energe of tussah silk,the stretched rate and the model elasticity are all raised certainly, its breaking is raised bigger, it is because the internal of tussah silk fromed the more manyβ-structure, tussah silk exists 200nm tiny diameter, it may make nano-TiO2 enter into them, so the properties of mechanic is raised. The result of this test will promote the uses of fibroin fime, we can improve the properties of physics according to the reality, thus the uses of fibroin fime can be enlarged, the better use condition of fibroin fime can be created.In the wake of the use of fibroin in the field of high technology, it has a lot of use in cosmetics, medicine, food, compound fibre, bio-technology respect.The material of creature has been develeped to the third dynasty, having promote the self of human body renovated and regenerated function. As the third bone organization material, it is not only keeping to the simple bone replace function,but also reguiring that material should have fall and untie nature and creature active, creature active procelain is more vast to use creature material carrier at present, having the creature each other and holding the nature may fall unite the nature wait for merit, when it was embeded the human body, it is superficially with the organization of human body by chemical key and it is completed to be able to reach each other, thus creature of this kind of material is very good to hold the nature each other and does not produce the immunity and shut out reaction.It mainly includes phosphoric acid pottery porcelain of calcium,pottery porcelain of calcium sulfate,pottery porcelain of calcium carbonate and their divide the body of different model together. Reports according to the literature, abroad scholar have grain of coral and from mixture of bone of body and use for the sheep before the lumber of road of body and back incline the lumber vertedra amalgamate, they carry on contrast from the bone of body and finded them have not the remarkable difference in amalgamate rate respect; scholar adopts OH-phosphorus grey stone transformed from bone of coral as the carrier, with rhBMp-2 compound the cervical vertebra of before road amalgamates applyed for the goat, the results showed that using the OH-phosphorus gery stone as the carrier can make backbone amalgamate. Domestic scholar prepared and researched of compound coat of the Mg/OH-phosphorus grey stone with the way of imitatin the raw legality. The creature material laboratory of GingHua university material department prepared a new material nHAC adopted imitatly method, and used for bone lacking and damage renovated. This result is very big useful to dinical, when patient is exceptional to lack the size to damage bone or the body quantity of bone isn't enough, using the material as accomplishment,may still reach the golden standard of healing up from bone of body. For looking for a new more efficient becoming bone because of son.Our subject group engaged in the preparation and studied on the structural and properties about nano-CaCO3/tussah silk composite film, this is content of fourth chapters.Tussah fibroin takes the CaCO3 to guided and instruct the deposit of fibroin, we struggled hard find a route of technology to prepare nano-CaCO3/tussah fibrion composite films,.we made the tentative research to the microcosmic structure of composite material, and we carried on testing and analysising to the properties of compound material through XRD,IR, DSC, SEM, the results showed that nano-particle even can disperse in the compound valve, but surpass certainly measure, nano-particle appeared a reunion phenomenon; The hot properties of compound valve is raised; Structure of composite fime is changed from silkⅠto silkⅡ;the test of Inflexible properties indicated that the properties of Silk film mechanics is raised when nano-CaCO3 was joined in it. The nape studies hold the lead in level of the country. It is very little report in the country about the becoming condition of valve of nano-CaCO3/tussah fibroin,the process of preparation and the study on the structure and properties. This nape research may be to supply the beneficial theory foundation data in the organization progect and in research to the bone ogranized and induction of becoming bone son and the suitable carrier of creature material, thus for openning up our country about the bone replaced material and the dinical uses of bone organize progect do the proguct grade and beneficial help.