Synthesis and Interfacial Tension Behavior of Heavy Alkyl Benzene Sulfonates

Heavy alkyl benzene sulfonates (HABS) were synthesized, and their interfacial tensions were measured and compared with those of petroleum sulfonates ORS-41. Effects of their coupling with lignosulfonate were also studied. The results showed that HABS exhibited good interfacial activities and the system of HABS blending with LS displayed better interfacial activities than ORS-41 and therefore reduced the prime cost. Their best proportions of synergism were from 3:1 to 4:1. HABS might be a more promising alkali-surfactant-polymer (ASP) flooding agent.     

非木本木质素磺酸镁对水泥净浆和砂浆性能的影响

用红外光谱法等测定了非木本木质素磺酸镁的结构特征参数,研究了其对水泥净浆和砂浆性能的影响,并与木本木质素磺酸钙进行了对比。非木本木质素磺酸镁结构中的甲基、酚羟基、芳香环比木质素磺酸钙少;特性黏度为 0. 61mL/g,仅是木质素磺酸钙的 61%;磺化度为 0 78mmol/g,比木质素磺酸钙低约 40%。木质素磺酸镁溶液的最低表面张力为 49 82mN/m,起泡性能与木质素磺酸钙相近。非木本木质素磺酸镁对水泥净浆和砂浆减水分散作用为木本木质素磺酸钙的 86 6% ~91 1%。但掺质量分数 0 5%的木质素磺酸镁的砂浆, 28d的抗压强度比掺木质素磺酸钙的高 70 5%。     

不同木质素磺酸钠对豆粕胶黏剂性能的影响

通过FTIR、元素分析、GPC对4种不同来源的木质素磺酸钠进行物理化学性质分析,并将其与水性聚酰胺协同改性豆粕胶黏剂(简称豆粕胶),利用测试接触角、剪切黏度和湿态胶合强度考察改性前后胶黏剂的浸润性、流变特性以及所得胶合板的胶合性能.红外谱图分析表明,在1065 cm–1附近出现了磺酸基或磺甲基中S==O的伸缩振动吸收峰,证明木质素经过磺化反应或磺甲基化反应得到木质素磺酸钠;木质素磺酸钠中磺酸基含量越高,经其改性的豆粕胶的零剪切黏度越低且在木材表面的润湿性越好;豆粕胶黏剂与杨木单板的接触角从未改性的95°降到改性后的61°;与水性聚酰胺协同改性后的豆粕胶制得胶合板的湿态胶合强度达到0.92 MPa,合格率为100％,满足国家Ⅱ类胶合板的标准要求(胶合强度≥0.70 MPa,合格率≥90％).     

复凝聚法制备农药微胶囊剂的研究

以壳聚糖和木质素磺酸钠为囊材,以三氟氯氰菊酯为囊芯,采用复凝聚法制备了微胶囊。考察了壳芯质量比、温度、搅拌速度、对包药率的影响,确定最佳工艺条件,并对其性能进行了研究。     

Metal Ion‐Catalyzed Hydrothermal Liquefaction of Calcium Lignosulfonate in Subcritical Water

Three metal ion catalysts, namely, Na⁺, K⁺, and Ca²⁺, were tested to improve liquefaction of calcium lignosulfonate, and their effects on product distribution were specifically investigated. Results showed that metal ion catalysts favored the production of hydrogen as well as of phenolic compounds. The total contents of phenolic compounds catalyzed by metal ions were generally higher than 75 %. The catalysis abilities of Na⁺ and K⁺ were better than that of Ca²⁺. The neutral‐alkaline condition was much more beneficial to calcium lignosulfonate liquefaction. Compared to the hydrochars with Na⁺ and K⁺ catalysts, the hydrochars with Ca²⁺ catalyst had higher carbon content and a higher heating value.     

Synthesis of lignosulfonate-acrylamide-dimethyldiallylammonium chloride copolymer and its flocculation performance

In this work, lignosulfonate-acrylamide-dimethyldiallylammonium chloride (LAD) terpolymer was designed and synthesized by microwave-assisted graft polymerization. The optimal synthetic process was obtained as follows: the monomer ratio was 1:4:4, the amount of initiator was 0.9% (w/w), the monomer solid content was 21 wt %, and the reaction time was 14 min with the microwave power of 280 W. Furthermore, the flocculation performance of LAD was verified by removing acid black-172 dye wastewater. At the LAD dosage of 350 mg L⁻¹, the maximum color removal ratio reached 99.8% in 100 mg L⁻¹ of dye wastewater. The dynamics of dye removal reached higher than 90% after 20 s. The flocculant can maintain color removal ratio more than 98% in a wide flocculant dosage and environmental pH. The flocculation mechanism was mainly electrical neutralization and bridging effect. In general, it is a promising candidate in wastewater treatment in terms of cost, synthetic method, and effectiveness. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2020 , 137, 48560.     

木质素基高吸水性树脂的制备与溶胀行为

以木质素磺酸钠(LS-Na)、2-丙烯酰胺基-2-甲基丙磺酸(AMPS)、丙烯酸(AA)为原料,N,N-亚甲基双丙烯酰胺为交联剂,过硫酸钾为引发剂,采用微波辐射法,通过接枝共聚合成了具有生物降解性能的LS-g-PAMPS/AA高吸水性树脂。探讨了单体配比、LS-Na用量和单体总用量对LS-g-PAMPS/AA树脂吸水倍率的影响,研究了该树脂在各种盐溶液中的溶胀行为,并利用FTIR和TG等方法分析了该树脂的结构。实验结果表明,当m(AA)∶m(AMPS)=3、LS-Na用量(基于体系总质量,下同)为6%(w)和单体总用量为35%(w)时,LS-g-PAMPS/AA树脂在去离子水和生理盐水中的吸水倍率分别为1 217g/g和125 g/g。LS-g-PAMPS/AA树脂具有较强的热稳定性、耐盐性和盐响应性能,在不同的盐溶液里有良好的可逆行为和多次反复利用性能。     

纸浆废液接枝共聚脂肪族减水剂的试验研究

对由纸浆废液制备的木质素磺酸盐与脂肪族减水剂接枝共聚合成木聚脂肪族减水剂进行了试验研究.通过红外光谱分析对减水剂分子共聚反应进行表征,按照单因素法进行工艺优化,确定了最佳合成工艺参数.性能测试结果表明,制得的木聚脂肪族减水剂具有良好的分散性和保塑性,综合性能优于脂肪族减水剂和物理复配减水剂.     

木质素磺酸钠Langmuir-Blodgett膜的制备与表征

为了深入研究木质素磺酸钠在气/液界面上的吸附特性,采用Langmuir-Blodgett(LB)膜天平成功地将木质素磺酸钠Langmuir膜以Y-型膜转移到固体石英玻片上,并采用紫外分光光度仪对其表征。通过研究木质素磺酸钠的π-A曲线得出其LB膜的制备条件:溶液浓度为10 g·L-1,亚相为0.01 mol·L-1 CdCl2,进样量为50μL,划障速率为10mm·min-1。通过添加5%(wt)的脂肪醇与木质素磺酸钠形成复合物,改变了木质素磺酸钠的分子构型,促使更多的木质素磺酸钠分子吸附于气/液界面,形成排列更加有序的Lamgmuir膜,长链脂肪醇对木质素磺酸钠吸附性能具有一定的促进效果,其促进效果随着醇的碳链增长而增强。     

木素磺酸钙对水泥净浆的缓凝机理研究

研究了掺加木素磺酸钙(简称木钙)后水泥净浆液相中钙离子、硫酸根离子和氢氧根离子浓度随水化时间的变化,以及除糖后木素磺酸钙对水泥净浆凝结时间的影响．结果表明,掺加木钙后在水化初期水泥净浆中S042-浓度大幅度上升,OH-浓度变化不大．木钙掺量越大,水泥净浆中游离Ca2 浓度的峰值出现越迟,浆体的初凝时间越长．进一步研究发现木钙的掺加能促进熟料矿物的水解,当木钙掺量为0．5％(质量分数)时,水泥净浆中的总Ca2 浓度峰值比未掺加木钙时增加48％,被络合的Ca2 量峰值较水化开始时增加2倍．在水泥净浆强碱性溶液中木钙的络合能力增强导致Ca(OH)2不能达到过饱和,是造成水泥净浆缓凝的重要原因,木钙对水泥净浆的缓凝机理为“吸附-络合”机理．