Abstract: A dithiocarbamate functionalized dendrimer with an alkylenediamine core, a dithiocarbamate pendant functional group and a dithiocarbamate end functional group, as a soil heavy metal immobilization amendment, and a preparation method thereof are provided. The dithiocarbamate functionalized dendrimer has a chemical formula of (CH2)a{N[CH2CH2COOCH2C(C2H5)(CH2OCOCH2CH2N(CSSM)CH2(CH2)bCH2N(CSS M)2)2]2}2, wherein a is a positive integer larger than 2; b is a positive integer at a range of 0-4; and M is Na+, NH4+ or K+. The dithiocarbamate functionalized dendrimer with the alkylenediamine core is used for an in-suit immobilization remediation for soil contaminated by heavy metals, and has advantages of a small dosage, high efficiency, safety and rapidness. The dendrimer is able to effectively immobilize exchangeable and carbonated bound forms of the heavy metals, in such a manner that the immobilized heavy metals are able to resist an influence from natural environment for a long term, such as an acid rain.

Abstract: A pentaerythritol core, phosphonic acid terminated dendrimer, its preparation method and application are provided. A preparation method of the pentaerythritol core, phosphonic acid terminated dendrimer (PETA-ADA-12PO3H2) comprises steps of processing Michael addition reaction on pentaerythritol tetraacrylate (C(CH2OCOCH2=CH2)4) and alkylidene diamine (NH2CH2(CH2)nNH2), wherein n is an integer from 1 to 5, so as to obtain pentaerythritol core, amino group terminated dendrimer, and modifying the amino group by methylene phosphonic acid to obtain the PETA-ADA-12PO3H2 having a chemical formula of C[CH2OCOCH2CH2N(CH2PO3H2)CH2(CH2)nN(CH2PO3H2)2]4, wherein n is an integer from 1 to 5.

Abstract: A trimethylolpropane core, phosphonic acid terminated dendrimer and its preparation method are provided, And a preparation method thereof comprises steps of processing Michael addition reaction on trimethylolpropane triacrylate (CH3CH2C(CH2OCOCH2?CH2)3) and alkylidene diamine (NH2CH2(CH2)nNH2), wherein n is an integer from 1 to 5, so as to obtain trimethylolpropane core, amino group terminated dendrimer, and modifying the amino group by methylene phosphonic acid to obtain the trimethylolpropane core, phosphonic acid terminated dendrimer having a chemical formula of CH3CH2C[CH2OCOCH2CH2N(CH2PO3H2)CH2(CH2)nN(CH2PO3H2)2]3, wherein n is an integer from 1 to 5.

Abstract: A star-shaped hyperbranched polymer with a triethanolamine core, a carboxylate lateral group and a dithiocarboxylate end group has a formula of N[CH2CH2OCOCH2CH2(COOM)N(CSSM)CH2CH2N(CSSM)2]3, wherein M is Na+, NH4+ or K+. The star-shaped hyperbranched polymer has an effectively stabilization effect on heavy metals in MSWI fly ash. A method thereof for stabilizing is simple, low in dosage, cheap and without secondary pollution. Therefore, heavy metals leaching concentration in fly ash stabilized production is lower than a limit of Chinese national standard. Furthermore, acid and alkali resistance thereof is sufficient, which decreases a long-term pollution risk in natural environment.

Abstract: A star-shaped hyperbranched polymer with a triethanolamine core, a carboxylate lateral group and a dithiocarboxylate end group has a formula of N[CH2CH2OCOCH2CH2(COOM)N(CSSM)CH2CH2N(CSSM)2]3, wherein M is Na+, NH4+ or K+. The star-shaped hyperbranched polymer has an effectively stabilization effect on heavy metals in MSWI fly ash. A method thereof for stabilizing is simple, low in dosage, cheap and without secondary pollution. Therefore, heavy metals leaching concentration in fly ash stabilized production is lower than a limit of Chinese national standard. Furthermore, acid and alkali resistance thereof is sufficient, which decreases a long-term pollution risk in natural environment.

Abstract: A trimethylolpropane core, phosphonic acid terminated dendrimer and its preparation method are provided, And a preparation method thereof comprises steps of processing Michael addition reaction on trimethylolpropane triacrylate (CH3CH2C(CH2OCOCH2?CH2)3) and alkylidene diamine (NH2CH2(CH2)nNH2), wherein n is an integer from 1 to 5, so as to obtain trimethylolpropane core, amino group terminated dendrimer, and modifying the amino group by methylene phosphonic acid to obtain the trimethylolpropane core, phosphonic acid terminated dendrimer having a chemical formula of CH3CH2C[CH2OCOCH2CH2N(CH2PO3H2)CH2(CH2)nN(CH2PO3H2)2]3, wherein n is an integer from 1 to 5.

Abstract: A pentaerythritol core, phosphonic acid terminated dendrimer, its preparation method and application are provided. A preparation method of the pentaerythritol core, phosphonic acid terminated dendrimer (PETA-ADA-12PO3H2) comprises steps of processing Michael addition reaction on pentaerythritol tetraacrylate (C(CH2OCOCH2=CH2)4) and alkylidene diamine (NH2CH2(CH2)nNH2), wherein n is an integer from 1 to 5, so as to obtain pentaerythritol core, amino group terminated dendrimer, and modifying the amino group by methylene phosphonic acid to obtain the PETA-ADA-12PO3H2 having a chemical formula of C[CH2OCOCH2CH2N(CH2PO3H2)CH2(CH2)nN(CH2PO3H2)2]4, wherein n is an integer from 1 to 5.

Abstract: A preparation method of octamethylenephosphonic acid terminated, PAMAM dendrimer and application thereof is provided, the dendrimer is prepared by modifying amino groups of 0 generation PAMAM dendrimer with methylene phosphonic acid, a constitutional formula thereof is: (CH2)n{N[CH2CH2CONHCH2CH2N(CH2PO3H2)2]2}2, wherein n is a positive integer between 2˜6. The octamethylenephosphonic acid terminated, PAMAM dendrimer has an excellent performance to inhibit scales of CaCO3, CaSO4 and Ca3(PO4)2, a very high calcium tolerance, and excellent dispersing performance. The octamethylenephosphonic acid terminated, PAMAM dendrimer is used as an antiscalant in industrial water treatment, and is suitable for the industrial water treatment of boiler, cooling, desalination, and oil production, etc., especially for the industrial water treatment under high calcium concentration.

Abstract: A preparation method of ethylenediamine core, octamethylenephosphonic acid terminated, PAMAM dendrimer and application thereof is provided, wherein terminal amino groups of ethylenediamine core, 0 generation, PAMAM dendrimer is modified by methylene phosphonic acid. The ethylenediamine core, octamethylenephosphonic acid terminated, PAMAM dendrimer has an excellent performance to inhibit scales of CaCO3, CaSO4 and Ca3(PO4)2, a very high calcium tolerance, and excellent dispersing performance. The ethylenediamine core, octamethylenephosphonic acid terminated, PAMAM dendrimer is used as an antiscalant in industrial water treatment, and is suitable for the industrial water treatment of boiler, cooling, desalination, and oil production, etc., especially for the industrial water treatment under high calcium concentration.