氨基磺酸系陶瓷分散剂在黑泥/水界面的吸附分散作用

氨基磺酸系陶瓷分散剂(ASP)与木质素磺酸钙(木钙)、萘磺酸盐甲醛缩合物(fdn)及磺化丙酮甲醛缩合物(saf)相比具有明显分散降黏效果。测定了四种分散剂在黑泥表面的吸附等温线及其对黑泥颗粒表面Zeta电位的影响,结果表明ASP既有较大的饱和吸附量,又能提高黑泥颗粒的Zeta电位,通过静电排斥和空间位阻协同作用表现出优良的分散性能。通过加入脲、氯化钠及柠檬酸钠研究了ASP在黑泥/水界面的吸附作用力,发现吸附过程的主导作用力是络合作用,同时氢键吸附也是重要的吸附作用力。     

红外光谱法测定β-萘磺酸盐甲醛缩合物的核体数

研究了用红外光谱法测定β－萘磺酸盐甲醛缩合物核体数的原理和方法,对不同萘与甲醛配比下合成的β－萘磺酸盐甲醛缩合物进行核体数测定,结果显示核体数随着甲醛摩尔数增加而增加。     

萘磺酸盐分散剂在不同晶型吡唑醚菌酯颗粒表面吸附性能

通过X射线衍射仪（XRD）、差示扫描量热仪（DSC）、紫外光谱（UV）、傅里叶变换红外光谱（FTIR）、X射线光电子能谱（XPS）和扫描电子显微镜（SEM）测试,研究了萘磺酸盐分散剂在两种晶型吡唑醚菌酯颗粒表面的吸附性能。两种晶型吡唑醚菌酯吸附萘磺酸盐分散剂后,晶型未发生改变;两种晶型吡唑醚菌酯吸附动力学均符合伪二级动力学方程,晶型Ⅱ E_a＝16.04 kJ·mol^-1,晶型Ⅳ E_a＝12.42 kJ·mol^-1,均为物理吸附;吡唑醚菌酯晶型Ⅱ、晶型Ⅳ吸附等温线均符合Langmuir模型,晶型Ⅱ的吸附焓变H_ad为20.64 kJ·mol^-1,吸附过程为吸热过程,温度升高有利于萘磺酸盐甲醛缩合物（D425）在晶型Ⅱ颗粒表面的吸附;晶型Ⅳ的吸附焓变H_ad为-15.26 kJ·mol^-1,吸附过程为放热过程,温度升高不利于D425在晶型Ⅳ颗粒表面的吸附。     

萘磺酸盐分散剂在不同晶型吡唑醚菌酯颗粒表面吸附性能

通过X射线衍射仪(XRD)、差示扫描量热仪(DSC)、紫外光谱(UV)、傅里叶变换红外光谱(FTIR)、X射线光电子能谱(XPS)和扫描电子显微镜(SEM)测试,研究了萘磺酸盐分散剂在两种晶型吡唑醚菌酯颗粒表面的吸附性能。两种晶型吡唑醚菌酯吸附萘磺酸盐分散剂后,晶型未发生改变;两种晶型吡唑醚菌酯吸附动力学均符合伪二级动力学方程,晶型ⅡEa=16.04 k J·mol~(-1),晶型ⅣEa=12.42 k J·mol~(-1),均为物理吸附;吡唑醚菌酯晶型Ⅱ、晶型Ⅳ吸附等温线均符合Langmuir模型,晶型Ⅱ的吸附焓变?Had为20.64 k J·mol~(-1),吸附过程为吸热过程,温度升高有利于萘磺酸盐甲醛缩合物(D425)在晶型Ⅱ颗粒表面的吸附;晶型Ⅳ的吸附焓变?Had为-15.26k J·mol~(-1),吸附过程为放热过程,温度升高不利于D425在晶型Ⅳ颗粒表面的吸附。     

高聚合度β-萘磺酸盐缩合物的合成

介绍了用工业萘、硫酸、甲醛为原料，合成高聚合度β-萘磺酸盐甲醛缩合物的工艺过程。试验了不同的萘与甲醛配比、反应时间和催化剂对缩合物核体数的影响，确定了可行的工艺条件。     

水质对以萘磺酸盐甲醛缩合物(NNO)为分散剂加工的氟铃脲悬浮剂流变性的影响

为研究水质对以萘磺酸盐甲醛缩合物(NNO)为分散剂加工的氟铃脲水悬浮剂流变性的影响,以指导该剂型的加工,采用控制应力流变仪测定了水中无机盐电解质种类和浓度、水的p H值变化等因素下制剂的流变性。结果发现:以不同水质对以萘磺酸盐甲醛缩合物(NNO)为分散剂加工的氟铃脲水悬浮剂的流变曲线符合Herschel-Bulkley流变模型;阳离子电解质的添加对氟铃脲悬浮剂的流变曲线影响较小。阴离子电解质的添加对氟铃脲悬浮剂的流变曲线影响较大。阳离子电解质的添加对氟铃脲悬浮剂的影响规律不明显,添加了阴离子电解质的氟铃脲悬浮剂减少了稠度系数K,增加了屈服值τH和流动行为指数n,具有"剪切增稠"特征,拟合决定系数都高于0.99。在水的p H值很低时,悬浮体系的黏度较高,悬浮体系屈服值τH也较高,稠度系数K较大,流动行为指数n较小,随着水的p H值增加,悬浮体系的黏度和悬浮体系屈服值τH降低,流动行为指数n变大,拟合决定系数R2都高于0.99。     

一种复合型水煤浆添加剂及其制备方法

<正>本发明公开了一种复合型水煤浆添加剂及其制备方法。此复合型水煤浆添加剂主要是由萘磺酸盐甲醛缩合物中间体与羧甲基纤维素钠中间体中和制备而成,制备方法主要包括萘磺酸盐甲醛缩合物中间体的制备、羧甲基纤维素钠中间体的制备及中和     

水泥对外加剂的适应性

配制流态化混凝土所使用的外加剂主要有萘磺酸盐甲醛缩合物、多环芳烃磺酸盐甲醛缩合物、三聚氰胺磺酸盐甲醛缩合物、改性木质素磺酸盐、多元醇系等，单一外加剂不能满足流态混凝土的流化效果、强度、干缩、抗冻性、耐久性及运输过程中的经时损失要求，为达到综合效果，视混凝土的特性要求．需加入。     

淀粉十二烷基糖苷在墙衣中的分散性

烷基糖苷能够显著降低水溶液的表面张力,具有乳化、分散、润湿等诸多性能,广泛用作食品、农药的乳化分散剂.淀粉十二烷基糖苷以甘薯为淀粉来源,将其用作墙衣分散剂,考察其在墙衣料浆中的分散性,结果表明:淀粉十二烷基糖苷对墙衣具有良好的分散润湿性、流动性及分散稳定性,较萘磺酸盐甲醛缩合物更适合分散植物纤维体系,也较辛基酚聚氧乙烯醚润湿性和稳定性更好.     

改性木质素磺酸钠水煤浆分散剂的合成及性能表征

以造纸黑液为原料,丙酮和甲醛为改性剂,通过磺化、缩合反应,合成了改性木质素磺酸钠(MLS),并通过Zet a电位、红外光谱和紫外-可见光分光光度测定等方法,对MLS分散剂、萘磺酸钠甲醛缩合物分散剂(NSF)和脂肪族分散剂(SAF)与低阶煤混合制浆的成浆浓度、流变性、分散剂在煤颗粒表面吸附量、吸附构型以及吸附稳定性进行了研究,确定了最佳的合成条件和分散剂用量。结果表明:MLS分散剂的最佳合成条件为改性剂nNa_2SO_3∶n丙酮为0. 7∶1、磺化时间90 mi n、缩合时间5 h、缩合温度90℃;分散剂添加量0. 5%时,煤样对MLS吸附速率最快,饱和吸附量为4. 52 mg/g,比NSF和SAF高0. 39 mg/g和0. 91 mg/g,且其吸附速率常数比NSF和SAF大;最佳分散剂合成条件下制成的煤浆,最大定黏质量分数达65%以上。     

Stabilization of raw porcelain gres suspensions with sodium naphthalene sulfonate formaldehyde condensates

The stabilization of raw porcelain gres suspensions with sodium naphthalene sulfonate formaldehyde condensates (SNSFC) was examined systematically in order to understand the basis mechanism of dispersion. Small additions of SNSF to the classical deflocculating mixture with sodium silicate were tested. The repulsion between the colloidal particles was correlated with the adsorption isotherm and zeta potential. The naphthalene sulfonate condensates were effective as dispersant for raw porcelain gres suspensions. The efficiency of these dispersant was attributed to electrostatic effect between the colloidal particles. The ability of the SNSFC to stabilise stabilize raw porcelain gres suspensions was not affected by the degree of condensation.     

Evaluation of sulphonated acetone–formaldehyde (SAF) used in coal water slurries prepared from different coals

A new type of water-soluble polymer, sulphonated acetone–formaldehyde resin (SAF), was developed as dispersant for the preparation of highly-loaded coal water slurry (CWS). In this study, in order to evaluate the practical use in industry, the SAF and a naphthalene sulfonate formaldehyde condensate are used to prepare CWS using four Chinese coals with different coalification degrees. The evaluation of the properties of CWS shows that SAF has better ability in reducing CWS viscosity at lower dosage than naphthalene sulfonate formaldehyde condensate, and that the CWS prepared from SAF has excellent stability within 48 h and exhibits shear-thinning apparent viscosity/shear rate behavior at lower dosage. Based on the results, the SAF is an effective and promising dispersant for highly-loaded CWS.     

酶解木质素―磺化丙酮―甲醛缩聚物的合成与应用

以酶解木质素、亚硫酸氢钠、偏重亚硫酸氢钠、丙酮和甲醛为原料制备酶解木质素―磺化丙酮―甲醛缩聚物(E-LSAF),并作为水煤浆制备中的添加剂。通过测定E-LSAF的红外光谱、吸附量和ζ-电位的,探讨了添加E-LSAF对水煤浆体系的影响,并对比了E-LSAF、碱木质素―磺化丙酮―甲醛缩聚物(A-LSAF)和工业木素磺酸钠作为水煤浆添加剂对水煤浆分散稳定性的影响。E-LSAF作为添加剂应用于水煤浆的制备中,既可以有效地利用酶解木质素,又可降低水煤浆制备的成本,提高水煤浆的分散稳定性能。     

Structural effect of prepared and commercial superplasticizers on performance of cement pastes

The sodium salt of melamine‐phenol formaldehyde sulfonate (MPhFS), melamine formaldehyde sulfonate (MFS), and phenol formaldehyde sulfonate (PhFS) were prepared according to a four‐step reaction procedure. The four steps of the reaction are hydroxymethylation, sulfonation, low pH condensation, and high pH rearrangement. Fourier transform IR and differential scanning calorimetry spectra were used to determine the structure of the synthesized resins. The effects of MFS, PhFS, MPhFS, and commercial superplasticizers on the rheological properties of cement pastes were investigated using a rotating coaxial viscometer. It was found that the prepared resins enhanced the rheological properties of cement pastes more than commercial ones. © 2003 Wiley Periodicals, Inc. J Appl Polym Sci 90: 482–487, 2003     

SAS/MAA/MPEGMAA聚羧酸盐分散剂的制备与性能

以甲基丙烯酸（MAA）和 4 种不同侧链长度的甲氧基聚乙二醇（MPEG相对分子质量分别为350,500,750,1000）先聚合得到酯化大单体（MPEGMAA）,再以甲基丙烯酸,烯丙基磺酸钠（SAS）为单体,在引发剂过硫酸钾,阻聚剂对苯二酚作用下聚合得到 4 种具有不同侧链长度的聚羧酸盐分散剂。通过红外（FT-IR）、核磁共振氢谱（¹H NMR）和凝胶渗透色谱（GPC）对聚合物的结构、相对分子质量及其分布进行了表征和分析,并将其作用于彬长煤制浆,考察了浆体的表观黏度、流变性、zeta电位、吸附性以及最大成浆浓度和稳定性,测定其与煤的接触角,并通过X射线光电子能谱（XPS）分析,得出煤粒表面吸附分散剂后的吸附层厚度为 6.12 nm。结果表明,侧链长度为SAS/MAA/MPEGMAA750的聚羧酸盐分散剂具有良好的润湿和吸附效果,对彬长煤具有更好的降黏、分散和稳定作用。     

漆酚缩甲醛聚合物微球的制备及其吸附性能

本文利用悬浮缩聚的方法合成漆酚缩甲醛聚合物微球,考察悬浮缩聚过程中单体的预分散、分散剂用量、单体的预聚、油水比例、催化剂用量、反应温度以及搅拌速度等对微球的形貌结构与性能的影响。结果表明,漆酚单体经预聚合后,在Mg(OH)2分散剂的作用下分散于甲醛水溶液中;在弱碱催化剂NH3·H2O的作用下,当油水比R=0.163时,搅拌速度r=300r/min时,于80℃～85℃进行悬浮缩聚反应,可以得到粒径为300μm,内部为多孔结构的聚合物微球。微球可以吸附废水中的重金属离子Cu2+、Pb2+和Cd2+等,其吸附选择性为Pb2+(21.9mg/g)Cu2+(21.3mg/g)Cd2+(7.1mg/g)。     

Effects of chemicals and blending petroleum coke on the properties of low-rank Indonesian coal water mixtures

In this study, the effects of different chemical additives including dispersant and stabilizer on the solid loading, viscosity, rheological behaviour and static stability of coal water mixtures have been investigated. In the experiments, naphthalene sulfonate formaldehyde condensate (NSF) was selected as dispersant and carboxymethyl cellulose sodium salt (CMC-Na) and nano-stabilizer were employed as stabilizers. An Indonesian low-rank coal, taken from Berau, East Kalimantan, was used for the study. To obtain high-loaded slurry, Liaohe petroleum coke was used to blend with Indonesian coal sample. The results of the experiments showed that adding chemical additives and blending Liaohe petroleum coke can effectively improve the slurryability of Indonesian low-rank coal.     

多环芳烃磺酸盐表面活性剂的合成

以煤焦油精馏组分为原料 ,在选定的条件下进行磺化 ,水解 ,缩合等反应生成 β-萘磺酸甲醛缩合物的钠盐 (多环芳烃磺酸盐 ) ,并就合成多环芳烃磺酸盐表面活性剂影响最大的三个因素 (总酸度、甲醛用量、硫酸用量 )进行了深入的探讨 ,确定了合成的最佳工艺控制条件。     

脂肪族水泥分散剂的改良与制备

脂肪族水泥分散剂以甲醛、丙酮、亚硫酸盐作为基本合成原料,经亲核加成和羟醛缩合合成。在此基础上试验了2种改性物质酰胺Ⅰ、酰胺Ⅱ。红外光谱证明,成功引入酰胺基团合成氨基化合物。分散剂掺量在0.6%时,水泥浆的流变指数和稠度系数与加入原分散剂时比值是0.914,0.934,1.513,1.307。改性后分散性能优异、大大降低了水泥浆稠度、水泥石抗压强度也高于标准要求,是新型预期可生物降解的缓凝型分散剂。     

Phenolic aminosulfonate surfactants

A series of new phenolic amino sulfonates has been prepared from mono- and dialkylphenols, formaldehyde, and N-methyltaurine by the Mannich condensation. From monoalkylphenols either mixtures of mono-and disubstituted products or completely disubstituted materials were obtained. Surface-active properties, of which lime soap dispersant activity is notable, were summarized for these products.