热塑性大豆蛋白质塑料研究Studyonthermoplasticsoybeanproteinplastics

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 research 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 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%, saturated 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; thermoplastic; 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, China) 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, sprinkle 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 8i8tance; 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 method 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 manufacture 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 boiling 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 resistance, 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 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 Reagent 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 twoExperimental 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; HAAKE 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 Author: 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 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, centrifugal 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 absorption 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 properties 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 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, destruction 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 properties 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 protein 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. modified 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 complex 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 znS0. 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 improved 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 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 formula 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, making 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 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 protein 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 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 temperature 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 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.Physical 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, Carassius 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, PMung 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 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 macromolecular 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 blends: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 Jiankang, 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 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 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 syndiotactic 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 Yong Yan, Tianjin, 2009,38 0 300457 plastic plastic (2)The reference (5) 1 meters. Dufresne plasticized starch tunicin whiskem, the Anglo / nanocomposite material: 2.mechanical. Biliaderis 20012 arvanitoyannis C G. The physical properties of the polyolplasticized edible blends made of three kinds of soluble cellulose and methyl starch 1999. Wu Q: L molecular weight effects on properties of soy protein preparation thermoplastics from isolate 2001 4 thermoplastic components of soy protein based on Jane preparing molded article 19965 mungura. J. P. The mechanical and thermal properties of soy protein J in table extruded 2001Similar Literature (7). 1. journal papers, Chen public security. Cui Yongyan,.CHEN, Gong-an.CUI, Yong-yan. Progress in water resistance improvement of soybean protein plastics - plastic 2006,35 (2)The water sensitivity is unfavorable factors that hinder the degradable plastics with soy protein is widely used, in order to overcome this shortcoming, have been explored extensively for protein modification and processing: heat, alkali modification, acid transfer, reducing agent, modification of crosslinking agent, additive modification, filling modification, ultrasonic treatment, ultraviolet radiation treatment, in order to improve the water resistance of ultra high pressure treatment, in order to obtain soy protein plastics with practical value.2. dissertation Liu Dengfeng functional single modified soy protein isolate plastics 2006This paper takes soybean protein as raw material, using functional monomer acrylic acid, oleic acid, maleic anhydride, benzoic acid, salicylic acid, monoacetate, glycidyl methacrylate (GMA) of soybean protein isolate was modified, the modified agent of carboxyl, hydroxyl and other oxygen-containing functional groups in the molecule and soybean protein amino, carboxyl, grafting reaction, thus preparing the functional soybean preparation has good mechanical properties and water resistance of the isolated protein. Using plastic molding method for the preparation of functional soy protein content on the basis of this study, effects of different processing conditions and the modifier separation properties and water resistance of soybean protein plastic mechanics. Results show that the content of acrylic acid with low tensile strength of reinforced SPI plastic; salicylic acid can significantly improve the elongation of SPI plastics; benzoic acid high content of SPI can be improved Plastic elongation; oleic acid, acrylic acid, maleic anhydride, benzoic acid, salicylic acid can improve the water resistance of SPI plastic; adding a single acetate not only reduces the lower tensile strength and elongation of SPI plastics, but also reduces the water resistance of SPI plastic; when the content of SPI is invariant, a small amount of GMA substitution of glycerol SPI plastic to enhance the toughening effect, and can improve the water resistance. In order to further study the interaction, change the interface between GMA and SPI agent with FT-IR, TG, DSC, SEM modern analysis and testing technology analysis of GMA modified SPI plastic and SPI, GMA, structure and properties of.TG self polymerization products GMA analysis shows that a small amount of GMA can improve the thermal stability of.TG and FR-IR analysis results show that the SPI plastic GMA dimer formation polymer molecular weight distribution in the broad, GMA modified SPI plastic is GMA homopolymer, and polymerization products A large amount of sub; but also because GMA is prone to self polymerization, and the thermal stability of the material and the formation of glycerol, the interaction between it and SPI is not obvious.SEM analysis showed that a small amount of GMA modified SPI plastic forming a flexible chain structure with good performance, elongation of this structure makes SPI plastic greatly improve. To reflect the functional soybean the prepared plastic separation performance of the protein has been reached or meet the market demand for the product performance.3. thesis Wang Hao soybean protein plastics processing and performance research 2001The soybean protein plastic has good application prospects: the use or potential use in agricultural production materials, packaging materials and other fields. This paper using differential scanning calorimetry (DSC), thermogravimetric analyzer (TGA), oven studies the thermal performance of soybean raw egg white, pure the soybean protein TG peak at 300 degrees Celsius, the glass transition temperature of 200 DEG C, and 150 degrees in the oven for 30 minutes after the protein color has changed significantly. The thermal properties of the data has been fully reflected on soybean protein plasticized modification processing is necessary; secondly, the research of plasticizer glycerin, by using HAAKE torque rheometer of water reducing agent (ReducingAgent), NaSO and the effect of soybean oil on lubricant processing and mechanical properties o