以碱水解后的大豆分离蛋白(SPI)为改性剂,替代一定量的尿素,制备大豆分离蛋白改性脲醛树脂,以改善脲醛树脂的胶合强度、游离甲醛释放及储存稳定性。分析了SPI的甲醛反应能力,以及改性脲醛树脂的胶合强度、热稳定性和生物降解性。结果表明,当SPI水解时间40 min,甲醛的反应能力达到59.23 mg/g,水解SPI尿素替代率对脲醛树脂的黏结性影响最大; 当水解温度85 ℃,SPI取代尿素质量的15%时,优化后的树脂胶合强度达1.16 MPa。DSC分析表明改性树脂(SPI/UF)与脲醛树脂(UF)相比,比热容差减少了18.7%,SPI/UF树脂具有较好的热稳定性。SPI/UF树脂经微生物接种培养后,20 d时树脂表层有霉菌生成。
Abstract
The object of this research was to provide a new approach for improving the adhesion performance of UF adhesive by modification with a small amount of soy protein. The optimum addition level of soy proteiniselate(SPI), as well as the adhesion performance, such as the bonding strength, free formaldehyde content and conformation change of SPI/UF adhesive had been investigated by the orthogonal balance block test of L9(34).The thermal performance of SPI/UF copolymer resin was characterized by differential scanning calorimetry, and the biodegradability of SPI/UF resin was preliminarily analyzed. The results showed that the bonding strength of SPI/UF resin was 1.16 MPa in the condition of hydrolysis at 85 ℃ for 40 min and urea substitution ratio of 15% by SPI. Thermal stability of the resin increased through SPI modification. A small amount of fungus colonies had become visible in the surface of SPI/UF resin after inoculation of microorganisms, which indicated the modified resin had gained a certain degree of biodegradability.
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参考文献
[1] 刘福生,王昇,宰德欣,等.人造板用脲醛树脂面临的问题及对策[J]. 南京林业大学学报:自然科学版,2005,29(1):93-97.Liu F S, Wang S, Zai D X, et al. The existing problems and suggestions of UF adhesive[J]. Journal of Nanjing Forestry University:Natural Sciences Edition, 2005,29(1):93-97.
[2] Plackett D, Andersen T L,Pedersen W B. Biodegradable composites based on L-polylactide and jute fibres[J].Composites Science and Technology,2003,63(9):1287-1296.
[3] Kimura T,Kurata M,Matsuo T. Compression molding and mechanical properties of green-composite based on ramie/PLA non-twisted commingled yarn[J]. Journal of the Society of Materials Science,2004,53(7):776-781.
[4] Oksman K,Skrifvars M, Selin J F. Natural fibres as reinforcement in polylactic acid(PLA)composites[J]. Composites Science and Technology,2003,63(9): 1317-1324.
[5] J Friedrich,P Zalar,M Mohorcic,et al. Ability of fungi to degrade synthetic polymer nylon[J].Chemosphere,2007,67(10):2089-2095.
[6] 张培娜,黄发荣,王彬芳.改性脂肪族聚酯的生物降解性研究[J]. 华东理工大学学报:自然科学版,2001,27(1):64-67.Zhang P N, Huang F R,Wang B F. Biodegradation of modified aliphatic polyester[J]. Journal of East China University of Science and Technology, 2001,27(1):64-67.
[7] Annika L,Ann C A,Minna H. Quantitative determination of degradation products an effective means to study early stages of degradation in linear and branched poly(butylenes adipate)and poly(butylenesuccinate)[J]. Polymer Degradation and Stability,2004,83:487-490.
[8] 高强,李建章,张世峰.木材工业用大豆蛋白胶粘剂研究与应用现状[J]. 大豆科学,2008,27(4):679-682.Gao Q,Li J Z,Zhang S F. Progress in study and application of soy protein adhesives for wood industry[J]. Soybean Science, 2008,27(4):679-682.
[9] 张亚慧,俞文吉.大豆蛋白胶粘剂在木材工业中的研究与应用[J]. 高分子材料科学与工程,2008,25(5):20-23.Zhang Y H,Yu W J. Soybean adhesives application in the wood industry[J].Polymer Materials Science and Engineering, 2008,25(5):20-23.
[10] Kumar R,Choudhary V,Mishra S,et al.Adhesives and plastics based on soy protein products[J]. Industrial Crops and Products,2002,16:155-172.
[11] Huang W N,Sun X Z. Adhesive properties of soy proteins modified by sodium dodecyl sulfate and sodium dodecylbenzene sulfonate [J]. Journal of the American Oil Chemists’ Society,2000,77(7):705-708.
[12] Sun X,Ke B. Shear strength and water resistance of modified soy protein adhesives[J]. Journal of the American Oil Chemists’ Society,1999, 76(8):977-980.
[13] Vander L M,Rutten A,Frens G.How to develop globular proteins into adhesives[J].Journal of Biotechnology,2000,79(3):211-221.
[14] Adachi M, Takenaka Y, Gidamis A B, et al. Crystal structure of soybean proglycinin A1 a B1 b homotrimer [J].Journal of Molecular Biology,2001, 305(2): 291-305.
[15] 王洪杰,陈复生,刘昆仑,等.可生物降解大豆分离蛋白材料的研究进展[J]. 化工新型材料,2012,10(1):16-18.Wang H J,Chen F S,Liu K L,et al. Research progress on biodegradable material of modified soy protein isolate[J]. New Chemical Materials, 2012,10(1):16-18.
[16] Riblett A L, Herald T J, Schmidt K A, et al. Characterization of β-conglycinin and glycinin soy protein fractions from four selected soybean genotypes[J]. Journal of Agricultural and Food Chemistry,2001,49: 4983-4989.
[17] 高振华,顾嗥.利用强碱性降解大豆蛋白制备木材胶粘剂及其表征[J]. 高分子材料科学与工程,2010,26(11):126-129.Gao Z H,Gu H. Prepartion and characterization of wood adhesives with strong alkali-degraded soybean proteins[J]. Polymer Materials Science and Engineering, 2010,26(11):126-129.
[18] Muhammad I A,Qaiser P,Bashir A. Studies on biodegradation of cellulose blended plyvinyl chloride films[J]. International Journak of Agriculture,2009,11:577-580.
[19] Lorenz L F,Conner A H,Christiansen A W. The effect of soy protein additions on the reactivity and formaldehyde[J].Forest products Journal,1999,49(3):73-78.
[20] 杨庆斌,于伟东.大豆蛋白纤维的热学性能[J]. 纺织学报,2005,26(2):53-55.Yang Q B, Yu W D.Thermal property of soybean protein fibers[J]. Journal of Textile Research, 2005,26(2):53-55.
[21] Sunmin K, Hyun J K, Hee S K, et al. Thermal analysis study of viscoelastic properties and activation energy of melamine-modified urea-formaldehyde resins[J]. Journal of Adhesion Science and Technology,2006,20(8):803-816.
[22] Shimao M, Curr Opin. Biodegradtion of plastics[J]. Current Opinion in Biotechnology,2001,12(3):242-247.
[23] Scott G. Green polymers[J]. Polymer Degradation and Stability,2000,68:1-7.
基金
收稿日期:2012-10-10 修回日期:2013-06-03
基金项目:国家农业行业科技计划农村废弃物循环利用技术研究集成与示范(200903011-01); 江苏省科技支撑计划(BE2011405)
第一作者:孙恩惠,助理研究员,硕士。*通信作者:常志州,研究员。E-mail:czhizhou@hotmail.com。
引文格式:孙恩惠,黄红英,武国峰,等. 大豆蛋白改性脲醛树脂胶的合成及降解性研究[J]. 南京林业大学学报:自然科学版,2014,38(1):97-102.
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