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1、热塑性大豆蛋白质塑料研究（Study on thermoplastic soybean protein plastics）This article is contributed by haxf003Pdf documents may experience poor browsing on the WAP side. It is recommended that you first select TXT, or download the source file to the local view.PlasticHuang Xiaohui: for large heat! Their resear
2、ch on the material quality egg bow doormaterial2009 volume second, issue 38Thermoplastic soybean protein plastics researchHuang Xiaohui Cui Yongyan(School of chemical engineering Tianjin University of Science and Technology, Tianjin 300457) Abstract: Based on the soybean protein modified soy protein
3、 added in saturated solution. Then using various additives acid reagent s on soybean protein molecular modification of soybean protein and starch from solution in the sink, the resulting modified soy protein has good toughness and water resistance, the breaking elongation rate can reach 200%, satura
4、ted water absorption rate below lO%. This method without glycerol and other small molecule alcohol as a plasticizer, a good way to avoid the small molecular alcohols plasticizer in the air volatile and in leaching water. Keywords: soybean protein modified plastics; resistance; water resistance; ther
5、moplastic; toughnessCLC number: TQ321.4.Document identifier: AArticle number: 100L one, 9456 (2009), 02, one, 0007 - 03The Shan oplasticHUANGSoybean Protein PlasncXi, -hui, CUI, Yong, Yan,.(CoUege of Material science&chemical Engineering Tianjin Unive ity of Tianjin Dan Science&Technology, 300457, C
6、hina) Abst ct:The soybean pmtein w modified with by adding vari s Dan 8dditive8 inThe, acid, Magen, association, S, and, u8edWA, R. waterNoSoy soyProtein protein88tumted soluti FI / d then t Lu, w got which had g - D Dan toughnes8W8s toW8sU8edToPrecipitateAt80yProteinF and m, 80lution, tlle, mod, sp
7、rinkle edMsi8tance, the, elongationBreak could achieve 200%and $atumted8sWaterAbso knocks at tionBelow, lO%.Thi8, method, the, air, and, di880lution, inAlcoholGlycemlOrOther small molecule8Plasticize listen, it, avoided, tlle, plasticizer, volatileKey words:80y proteinPlaBtics; modify; w8ter; he 8i8
8、tance; the Shan kowtow; la8tic; toughne8sWith the sustained high oil prices and environmental pollution pressure, natural polymer resources from plants and animals will gradually replace the current petrochemical materials. Compared with other natural polymer materials, soybean protein extraction me
9、thod is simple, abundant, inexpensive, molecular has unique structure characteristics and interaction, the side chain is rich active groups, can carry out physical and chemical modification, has good prospects for study. The current strength of soy protein plastics is low, suitable for the manufactu
10、re of plastic Christmas trees, plastic flowers and other ornamental. A pure soybean protein plastic is very brittleness, poor processing performance, does not have the actual use, must add plasticizer agent in order to improve the flexibility and processability. In plasticizers, glycerol and high bo
11、iling point, strong stability, has a plasticizing effect on many natural polymer and its derivatives. .31 is the most commonly used soy protein plastics, plasticizer most effective. However, glycerol absorbent and volatile, the plasticized soy protein plastics performance instability, poor water res
12、istance, and put in the air will gradually embrittlement, therefore, glycerol plasticized soy protein plastic utility the poor. Choose the change in solution, solves the problem of modified dispersion homogeneity and additive, the soy protein plastics modified with good rheological properties, water
13、 resistance and toughness, good plasticity, without plasticizer,The volatilization of small molecular alcohol plasticizers in the air and the dissolution in water are avoided11.1Experimental part raw materialSoybean meal: a dip, commercially available; Na:SO: pure analysis, Tianjin Damao Chemical Re
14、agent Factory; ZnsO.: analysis of pure, Tianjin Tianda chemical experimental plant; urea: analysis of pure chemical reagent factory, Tianjin North day; si0: micron, commercially available; acidic reagent S: made NaOH: analysis; pure, northern Tianjin Tianyi chemical reagent factory.One point twoExpe
15、rimental equipmentElectromagnetic flat vulcanizing machine: xLB - DC400 * 400, Zhuzhou times mechanical and electrical equipmentLimited company; electronic universal testing machine: Shenzhen ruiger Instrument Co., Ltd.; dumbbell system prototype: MZ_4102, Jiangdu Mingzhu machinery factory test; HAA
16、KE plasticarder torque: HAAKE; melt flow rate instrument: Doo PxRZ 400C, Jilin University scientific instrument factory; thermal analyzer: STA449c, the German company Netzsch.1.3 sample preparationConfigure soy protein saturated solution: NaoH, O.25, moL/L, urine- 4118: introduction 2008 lO 09 Autho
17、r: Cui Yongyan (1965 -), male, associate professor, master tutor, mainly engaged in the research and application of natural polymer materials. Study on modification and application of polymer materials.One, 7, oneWanfang DataPlasticmaterialHuang Xiaohui: Retan of soybean protein quality of material
18、door and nephew2009 volume second, issue 38The concentration of o.8 moVL, a sufficient amount of soybean powder in solution. Adding different proportion of zns0., Na2S03, Si02, lO min. solution while stirring mixing with acidic reagent S titration to neutral and produce a lot of precipitation, centr
19、ifugal separation and drying at a temperature below 60 DEG C, modified soybean protein powder. The modified soy protein powder at in the mould, at 110 DEG C andTenAccording to GB 13022-9l, the sample is made of dumbbell, and the tensile strength and tensile speed are measured50 mm/mino1.4.5 water ab
20、sorption is determined by the method L, 3 in GB 1034-86, and the formula is expressed as formula (1):Tong = (m2, a, M1) /ml * 100% (1)MPa under pressing lO min molding1.4 test methods of performance melt flow of 1.4.1 melt flow rate meter, 105 DEG C, weight 4894 1.4.2 plasticizing and rheological pr
21、operties were determined by HAAKE plasticorder. 1.4.3 TG N2,20 C /min is heated to 400 DEG C. The tensile properties of 1.4.4G.Type: envy a sample of water absorption; M. one before the water quality of the sample; Gong, a soaked sample quality2 results and discussionTwo point oneAcid reagents S and
22、 Na:S0, for soy protein plastics, various propertiesThe effect of acidic reagents s and Na:SO on the formula of modified soy protein plastics is shown in table 1.Table 1 basic formula of testAcidic reagent S containing silane compounds, and the hydrophilic protein molecule chain reaction, destructio
23、n of intramolecular hydrogen bonds, to improve the thermal stability and water resistance. According to the formula in Table L L shows that S modified by acid reagent, rheological properties of soybean protein plastic, toughness and water resistance were improved greatly so, have the processing prop
24、erties of soybean protein in use at the same time also has certain properties. The reducing agent can destroy two disulfide bonds in the molecule of soybean protein, promote the expansion of Ho. from 2 to 4 formula of molecular chainTo see that the reducing agent Na:s0, rheological property of soy p
25、rotein plastics have greatly improved, reducing agent Na2SO, the best dosage of L g/L (L in L saturated soybean protein solution with L G, the same below), the melt index increased to the original 166.8%.Two point twoEffects of ZnSO. on properties of soybean protein plasticsThe formula for znS0. mod
26、ified soy protein plastics is shown in table 2.Wrap 2 test basic formulaBecause of the large amount of amino acid in the soybean protein, in addition to the introduction of zn2+ and functional groups (aspartic acid and glutamic acid) to form ionic bonds. Can also and protein in O, N, s formed a comp
27、lex chelate, these effects make the protein molecules hard and youngsmodulus increase, water absorption decreased. Table 2 shows zns0. on the other properties of the shadowAt the same time, it can effectively improve the water resistance of soybean protein embedding material. The optimum dosage of z
28、nS0. is 6 g/L, and the water absorption rate is reduced to 42.8%.Two point threeEffects of SiO: on properties of soybean protein plasticsThe effect of sio: on the properties of soybean protein plastics is shown in table 3.Wrap 3 test basic formulaAs can be seen from table 3, Si0: significantly impro
29、ved the processability and toughness of modified soy protein plastics, and the melt index increased from 3.OI s/lOmin to 8Six point eightG/lOmin, the elongation at break increased from 55.3% to 200%, and the tensile strength was somewhatThe decrease of water resistance has little effect on the water
30、 resistance. Considering the formula 4 is the best formula at presentWanfang DataPlasticHuang Xiaohui et al - Thermoplastic large egg F, I quality plastic researchmaterial2009 volume second, issue 38Thermal properties of modified soybean protein plastics 2.4For the soy protein plastics prepared in f
31、ormula 4, TG analysis, as shown in Figure L., is carried out for 2.3Not high, but modified soybean protein plastics have good processabilityThreeconclusion1) the rheological properties and toughness of soybean protein plastics were modified by acid reagent SAnd water resistance are also improved, ma
32、king soy protein plastics in the industry to adapt to a variety of plus Fort style at the same time also has certain performance. 2) Na:S0, effectively improve the melt flowability of modified soy protein plastics, melt index increased to the original 166.8%.Strange, Qianshan waterA known, sorrowful
33、 soil cut BUN)3) znSO. effectively improves the water resistance of modified soybean protein plastics and reduces the water absorption to the original 42.8%.Temperature, temperatureI thermal weight loss rate curve; 24) si0: improved the rheological properties and toughness of modified soybean protei
34、n plastics. The melt index increased by 125.9% and the elongation at break increased by 263.6%. 5. The optimum formula was 1 added per liter of saturated soybean protein solution6, G, znS04,2, G, Si0:, 156.8, G, Na:SO,Ring LThermogravimetric analysis (TG) curve of modified soybean protein plasticsAs
35、 shown in Figure L, after modification, the rate of thermal weight loss becomes very small, and the change curve of thermal weight loss rate tends to the level between 50175 degrees Celsius, which shows that the thermal stability of soybean protein is improved by 95%, and the mass holding temperatur
36、e is 115 DEG CML acidic reagent S. key performance: melt indexG/lOmin, tensile strength 3.29 MPa, elongation at break 200.7%, 24 h suctionWater rate 7.1%.2.5 rheological properties of modified soybean protein plasticsRheological analysis of soy protein 4 formulated in 2.3 was carried out to obtain a
37、 torque curve, as shown in figure 2.Reference:1Angk8M, N, Du, Tuo, sneA.Pla8ticizedBtarch/tunicillWhiske wallN m_ rials:2.Mech ical mobile ocomposite Beh iwC busy canthus boo200l.34:292l one 2931.J.M pull Shan olecuk well,2 words-Arvanitoy NIS L Biliadcris C boot.Plasticized edible bIend8 madeG.Phys
38、ical ofPmperti long of polyol-Memyl CE ULO lubk Mrch D - Zhu TuoZFor photo BlasterJ.ca spit mhydr 3WuPolym, 1999,38:47 - 58.Q, Zh g L.E C of CO unloading e moI ular Wei Mountain t tlIe pmperties of Song YangAppl PolymThe Shan, oplaelic5, P, p8md, FMM, lateJ.J, ly, pmtein, I, Carassius auratus, Caras
39、sius auratusSci, 200l, 82:3373 - 3380.4Cao * r 110 C: IV =30 miIl.J e.soy protciII-ba - d the: tic comp - ITI OPL and Dan for pMp resistance to ng youMoldcdArticle hi: United StatesPat long T.5Five hundred and twenty-three293P.1996 a 04. Tlie Shan al pmpertie5TheRing 2Haake torque curve5JZhang, PMun
40、g J J PA, you e.mechanicalandExtmdcd H-infinity yPmteiii poison HEEB (J).Polymer, 200l, 42, 2569-2578.(edit gzw)From Figure 2 shows that the modified soy protein plastics under 1LO DEG C melting has softened, balance torque of 2.9 n - m, although with body strength of modified mortar plastic basket
41、Daxian Yu (on page 69) were 0.16 and 2.4 copies of copies, minimum apparent density, when the content of DVB and DCP were o.12 and 2 copies of copies, flexural strength and impact strength. 3) joined DCP and DVB PP can make the formation of free radicals, these free radicals are combined to form mac
42、romolecular network structure, so that the gel rate increased. With increasing DCP and DVB content, gel rate increased firstly and then decreased. When the content of DCP and DVB were o.16 and 2 copies of copies. The gel rate is maximum.Materials 2004,32 5, (2): 8, one, 11.Paul DR.bucknaiiCB.poiym b
43、lends:fomul and PE ion in blood MMCEIilc, 2004:739M - new, y.rk:j.hn, Wiley & S, s6 R E. Human 0f Yow Kennedy C a 69ilmtion O P Si J - joumalM8k one 818Song. 5, (6): 2004,39, 1143 - 1145.7 t G J G, G, W8 II H, 5.f.rga 8L e.l.8 g. The blood 89e CentreReference：1 Xu Hongfei, Huang Hanxiong, Wang Jiank
44、ang, PP / PS blends of supercritical fluid foaming of Huizhou J - plastic, 2008,37 48 (2): 2 Si Chunlei, Li Jixin, Li Sujun, LDPE / EVA foam resistance temperature characteristic J - plastic filling 2008 / 37 - carbon black, (1): l 5 3 Li Yong, Liu Chunsheng, Hu Fuzeng, etc., the graft modification
45、of polypropylene and its extrusion foaming of J - functional polymer (3): 4292004,17 - 436 4 Xiong Lijun foamed polypropylene production status J. Wu Biyao - chemical model 9J.P.lymer.2004,45 (7): 208L, one, 2091. Wu Zhihua 8, J. China sun Zhouyu. Effect of process parameters of injection molding PP
46、 microporous material structure of plastic, 2002.16 (9): 57 - 61. Yang Zhiwei, Kingdom. Study on the application of nano Zinc Oxide / AC composite foaming agent in PP foaming. J. Plastic, 2003,32 (2): 6-8. 10 Yu Qiang, Lin Mingde, Liu Jianzhong, et al. Study on organic peroxide crosslinked syndiotac
47、tic polypropylene J. Polymer materials science and engineering, 200l.17 (5): 46-49.(edit gzw)One o oneWanfang DataStudy on thermoplastic soybean protein plasticsAuthor: Department of English journal, volume (period): cited: Huang Xiaohui, Cui Yongyan silent a little gray, yellow, School of chemical engineering Tianjin University of Science and Technology