聚天冬氨酸/氨基乙醛缩二乙醇的合成及其阻垢分散性能
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摘要
以马来酸酐、尿素、氨基乙醛缩二乙醇(AED)为原料,制备了聚天冬氨酸/氨基乙醛缩二乙醇(PASP/AED)接枝共聚物,并通过~1H NMR表征了其结构,采用静态阻垢法对其综合阻垢性能予以考察.结果表明接枝物对高硬度、高磷和高温水体系的适应性较PASP有较大提高,当接枝物浓度为0.75、4和8mg/L时,其对应的阻CaCO_3、CaSO_4和Ca_3(PO_4)_2垢率均高达100%.SEM和XRD分析表明接枝物的应用可使钙垢晶体发生畸变,破坏垢晶体正常生长.同时接枝物对氧化铁也有较好的分散能力,当接枝物浓度为50mg/L时,溶液的透光率可降低至61%左右.
Polyaspartic acid/aminoacetaldehyde diethyl acetal(PASP/AED)copolymer was prepared by the reaction of maleic anhydride,urea and AED.The structure of PASP/AED was characterized by 1 H NMR,and the static scale inhibition method was used to investigate its scale inhibition performance.The simulation experimental results indicate that the adaptability of the grafts to high hardness,high phosphorus and high temperature water systems is greater than that of PASP.Scale inhibition efficiency of PASP/AED is close to 100% against CaCO_3,CaSO_4 and Ca_3(PO_4)_2 at dosages of 0.75,4and 8mg/L,respectively.SEM and XRD analysis shows that the grafts can distort calcium scale crystals,and destroy the normal growth of scale crystals.The grafts have also good dispersion ability to ferric oxide,and the best transmittance for ferric oxide is 61% when PASP/AED concentration is 50mg/L.
Polyaspartic acid/aminoacetaldehyde diethyl acetal(PASP/AED)copolymer was prepared by the reaction of maleic anhydride,urea and AED.The structure of PASP/AED was characterized by 1 H NMR,and the static scale inhibition method was used to investigate its scale inhibition performance.The simulation experimental results indicate that the adaptability of the grafts to high hardness,high phosphorus and high temperature water systems is greater than that of PASP.Scale inhibition efficiency of PASP/AED is close to 100% against CaCO_3,CaSO_4 and Ca_3(PO_4)_2 at dosages of 0.75,4and 8mg/L,respectively.SEM and XRD analysis shows that the grafts can distort calcium scale crystals,and destroy the normal growth of scale crystals.The grafts have also good dispersion ability to ferric oxide,and the best transmittance for ferric oxide is 61% when PASP/AED concentration is 50mg/L.
引文
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[2]FENG J,GAO L,WEN R,et al.Fluorescent polyaspartic acid with an enhanced inhibition performance against calcium phosphate[J].Desalination,2014,345:72-76.
[3]OTHMANI M,AISSA A,BACHOUA H,et al.Surface modification of calcium-copper hydroxyapatites using polyaspartic acid[J].Appl Surf Sci,2013,264:886-891.
[4]NIEDERMAYR A,KOHLER S,DIETZEL J.Impacts of aqueous carbonate accumulation rate,magnesium and polyaspartic acid on calcium carbonate formation(6-40℃)[J].Chem Geol,2013,340:105-120.
[5]NAYUNIGARI M K,GUPTA S K,KOKKARACHEDU V,et al.Development of anti-scale poly(aspartic acid-citric acid)dual polymer systems for water treatment[J].Environmental Technology,2014,35:2903-2909.
[6]邵海磊,刘彤,王丹,等.管内强化传热的数值研究[J].河南大学学报(自然科学版),2015,45(5):537-542.SHAO H L,LIU T,WANG D,et al.Numerical study on enhanced heat transfer in tubes[J].Journal of Henan University(Natural Science),2015,45(5):537-542.
[7]LOW K C,KOSKAN L P.Synthetic polyaspartic acid and its uses[J].Polym Mater Sci Eng,1993,69:253-260.
[8]TOMIDA M,NAKAOTA T.Convenient synthesis of high molecular weight poly(succinimide)by acid-catalysed polycondensation of L-aspartic acid[J].Polymer,1997,38(18):4733-4736.
[9]TANG J S,FU S L,EMMONS D H.Biodegradable modified polyaspartic polymers for corrosion and scale control.US:6022401[P].2000-02-08.
[10]MARTINOD A,EUVRARD M,FOISSY A,et al.Progressing the understanding of chemical inhibition of mineral scale by green inhibitors[J].Desalination,2008,220:345-352.
[11]SUBRAMANI A,JACANGELO J G.Emerging desalination technologies for water treatment:A critical review[J].Water Research,2015,75:164-187.
[12]LI H,HSIEH M K,CHIEN S H,et al.Control of mineral scale deposition in cooling systems using secondary-treated municipal wastewater[J].Water Research,2011,45:748-755.
[13]CHEN J,XU L,HAN J,et al.Synthesis of modified polyaspartic acid and evaluation of its scale inhibition and dispersion capacity[J].Desalination,2015,358:42-48.
[14]SHI S C,WU Y F,WANG Y Y,et al.Synthesis and characterization of a biodegradable polyaspartic acid/2-amino-2-methyl-1-propanol graft copolymer and evaluation of its scale and corrosion inhibition performance[J].Rsc Adv,2017,7:36714-36721.
[15]ZHANG B,ZHOU D P,LYU X G,et al.Synthesis of polyaspartic acid/3-amino-1H-1,2,4-triazole-5carboxylic acid hydrate graft copolymer and evaluation of its corrosion inhibition and scale inhibition performance[J].Desalination,2013,327:32-38.
[16]GAO Y H,FAN L H,WARD L,et al.Synthesis of polyaspartic acid derivative and evaluation of its corrosion and scale inhibition performance in seawater utilization[J].Desalination,2015,365:220-226.
[17]FENG J Y,GAO L J,WEN R Z,et al.Fluorescent polyaspartic acid with an enhanced inhibition performance against calcium phosphate[J].Desalination,2014,345:72-76.
[18]XU Y,ZHANG B,ZHAO L L,et al.Synthesis of polyaspartic acid/5-aminoorotic acid graft copolymer and evaluation of its scale inhibition and corrosion inhibition performance[J].Desalination,2013,311:156-161.
[19]XU Y,ZHAO L L,WANG L A,et al.Synthesis of polyaspartic acid-melamine grafted copolymer and evaluation of its scale inhibition performance and dispersion capacity for ferric oxide[J].Desalination,2012,286:285-289.
[20]张苯,李永远,齐天勤机,等.两种聚天冬氨酸接枝共聚物的制备及其阻垢性能[J].化学研究,2013,24(4):420-424.ZHANG B,LI Y Y,QITIAN Q J,et al.Preparation of two kinds of polyaspartic acid grafted copolymers and their scaleinhibition performance[J].Chemical Research,2013,24(4):420-424.
[21]ROWETON S,HUANG S J,SWIFT G.Poly(aspartic acid):Synthesis,biodegradation and current applications[J].Journal of Environmental Polymer Degradation,1997,5(3):175-181.
[22]中华人民共和国国家质量监督检验检疫总局,中国国家标准化管理委员会.GB/T 16632-2008水处理剂阻垢性能的测定碳酸钙沉积法[S].北京:中国标准出版社,2008:1-4.General Administration of Quality Supervision,Inspection and Quarantine of the People's Republic of China,Standardization Administration of China.Determination of scale inhibition of water treatment agents-calcium carbonate precipitation method GB/T16632-2008[S].Beijing:Standards Press of China,2008:1-4.
[23]LIU D,DONG W B,Li F T,et al.Comparative performance of polyepoxysuccinic acid and polyaspartic acid on scaling inhibition by static and rapid controlled precipitation methods[J].Desalination,2012,304:1-10.