湿地松松香歧化反应研究初探

以湿地松松香为原料,用抗氧剂300作催化剂,探讨松香的歧化反应。结果表明：抗氧剂300对湿地松松香歧化反应有作用,但反应产物尚未达到歧化松香产品的要求。     

松香及其衍生物在无机功能材料中的应用研究进展

松香是我国重要的生物质资源,其主要成分树脂酸含有三环菲骨架强疏水刚性基团和羧基弱亲水基团,可用于无机纳米材料的分散,降低无机纳米材料的聚集.通过对松香树脂酸双键和羧基等位点进行化学改性,增强亲水性能,可获得亲水亲油性能优异的表面活性剂,与无机材料具有更好的"融合性",作为模板剂和分散剂,可控辅助制备多种无机功能材料.而...     

浅色油酸、松香改性双酚A酚醛树酯的合成与结构

用油酸、松香、双酚A、多元醇等合成一种性能优异的快干、光泽度大、耐水、耐酸、碱较好的树脂；对合成最佳工艺条件进行了筛选。用FTIR谱、TGA谱对产物进行了检测。     

全氟磺酸树脂催化松香树脂酸的异构化反应

研究在95%乙醇中废弃的全氟磺酸树脂膜(简称PFSR)催化松香树脂酸异构化反应,直接结晶分离枞酸的可行性。结果表明,在常压加热反应条件下,PFSR能够较好地催化松香树脂酸的异构化反应;催化剂用量和反应温度对树脂酸异构化反应速度和异构反应平衡溶液中枞酸相对含量有较大的影响;在松香质量为20 g,溶剂体积为20 mL,PFSR用量为松香质量的20%,反应溶液沸腾温度条件下反应5 h,树脂酸异构反应达到平衡,枞酸相对含量高达78%;过滤分离回收催化剂后,将异构松香溶液直接冷却结晶,析出枞酸粗产品,再在95%乙醇中重结晶提纯3次,得到纯度为95%、产率为35%的枞酸。     

松香催化加氢的研究进展

对松香加氢反应使用的负载型贵金属催化剂、骨架镍催化剂、纳米镍催化剂及其反应动力学做了全面的综述,并对上述催化剂的优缺点进行了讨论,对氢化松香的研究应用前景进行了展望,认为研制价廉、低温、低压下高活性的催化剂是松香氢化反应的研究重点。     

松脂·咪鲜胺18%乳油防治水稻稻瘟病田间药效研究

试验结果表明,松脂·咪鲜胺18%乳油对水稻稻瘟病有较好的防治效果。适宜施药剂量为162~270g·ai/hm2,对水稻叶瘟和穗瘟的防效分别为91.7%~94.6%和81.5%~86.4%。施药适期:防治叶瘟在发病初期施药1次,视病害发生情况间隔7d左右施第2次药,防治穗瘟在破口期和齐穗期各用药1次。     

中国松香出口市场结构的实证分析

应用MCR指数、HHI指数、D指数、E指数对中国松香出口结构进行实证分析,结果表明,中国松香出口市场结构呈优化趋势,380690类松香出门增长迅速,松香出口市场潜力较大.     

Preparation and sizing mechanisms of neutral rosin size II: functions of rosin derivatives on sizing efficiency

Four rosin derivatives, including rosin esters and rosinamides, were synthesized and used to prepare neutral rosin sizes. Their effects during sizing are discussed in detail. Compared to natural rosin, the rosin derivatives had nearly no effect on sizing even at high retention levels in paper. However, the rosin derivatives in the rosin sizes improved the stability of the emulsion size particles, and there was good correlation between the sizing effect and the stability of the emulsion sizes under neutral to alkaline conditions. On the other hand, the structure of the rosin derivatives significantly influenced the stability and sizing effect of the neutral rosin sizes. In particular, for glycerin rosin ester-rosin sizes, the emulsion stability and sizing effect increased with an increasing proportion of dirosinate, among the glycerin rosin esters. Consequently, it was suggested that the rosin derivatives hardly contribute to the sizing performance of paper but predominantly function to stabilize the neutral rosin size particles, thereby improving the efficiency of the size under neutral to alkaline sizing conditions. Also it was supposed that glycerol dirosinate in the neutral rosin size would probably enable formation of a more stable particle structure to prevent the destructive action of the OH^– ion.This research was presented in part at the 48th annual meeting of the Japan Wood Research Society, Shizuoka, April 1998     

浅色失水苹果酸酐改性松香树脂的生产工艺

经对浅色失水苹果酸酐改性松香树脂的传统生产工艺进行改进后，生产出的树脂产品颜色较浅，质量较高。     

马尾松单板脱脂的工艺研究

本研究采用马尾松(Pinus massoniana Lamb)单板的多样品在多状态、多溶剂的类型下,进行脱脂试验,确定了较好的萃取剂和工艺条件;还从不同的角度对溶剂的回收工艺、回收率和回收设备进行了探讨,为工业化生产提供了实验依据。