松香胺类衍生物在非表面活性剂方面的应用研究

综述了近年来国内外松香胺类衍生物在非表面活性剂方面的应用研究进展,主要包括催化特定氧化反应、手性反应及手性拆分、Maillard反应、抗菌活性、离子识别、施胶、废水处理、缓释、缓蚀、助焊剂等方面。     

Efficient preparation of mesocarbon microbeads by pyrolysis of coal-tar pitch in the presence of rosin

Mesocarbon microbeads (MCMB) were prepared by pyrolysis of coal-tar pitch in the presence of rosin, and characteristics of the pitch-rosin mixtures and the MCMB were studied. Pyrolysis behavior of the pitch-rosin mixtures was investigated by thermogravimetric analysis (TGA), and chemical structures of the pyrolysated pitch-rosin mixtures were studied using Fourier transform infrared spectroscopy (FTIR) technique. Optical textures of the pyrolysated pitch-rosin mixtures were characterized by polarized-light microscopy. In addition, morphologies and microstructures of the MCMB, extracted from the pyrolysated pitch-rosin mixtures, were studied using scanning electron microscopy (SEM) and transmission electron microscopy (TEM), respectively. Results show that the rosin addition contributes to a notable increase of MCMB yield as well as a decrease in the aromaticity index of the pyrolysated pitch-rosin mixtures. Moreover, the pyrolysis conditions have great effect on the morphologies and yields of MCMB. When the pitch-rosin mixtures are pyrolysated at 450 °C for 1.5-2.5 h, the MCMB yields arrive at 33.8-54.6 wt.% of the pyrolysated pitch-rosin mixtures.     

Characterization of selected paper documents from the archives of Palazzo Ducale (Venice), Italy using various analytical techniques

The paper manufacturing process remained unchanged for many centuries, until, in the nineteenth century, the crisis of rags led industrialized countries to patent new production processes with different raw materials. This study deals with this period of transition by analyzing four samples stored at the archives of Superintendency Beni Architettonici per il Paesaggio e per il Patrimonio Storico Artistico ed Etnoantropologico (BAPPDAD) of Venice Lagoon, based in the Palazzo Ducale.The samples were analyzed by FT-IR (ATR), SEM-EDS, HPLC-MS/MS and Py-GC/MS. These techniques allow the characterization of various raw materials and adhesives used in various stages of paper production.These analyses have found a gradual introduction of ground wood in the composition of papers from the mid-nineteenth century, and the use of rosin as glue only in more recent documents.     

松香试样的预处理及痕量砷的测定方法研究

提出松香样品添加混合助剂MgCO3 Mg(NO3 ) 2 进行干灰化预处理 ,并将此法与硝酸 高氯酸的湿消解法和仅添加Mg(NO3 ) 2 的干灰化法进行了比较。结果表明 ,本法在抑制砷的挥发方面 ,比仅用Mg(NO3 ) 2作为灰化助剂的干灰化法效果更好 ,砷的回收率在 94 %～ 10 5 % ;比用硝酸 高氯酸湿消解法分解试样更彻底 ,可以避免剩余酸除去时引起的砷损失。试验还表明 ,HG AFS测As的检出限DL =0 31ng·mL-1,松香中的砷不用富集便可进行测量 ,对国家标准物质桃叶GBW 0 85 0 1中砷的测定结果与推荐值一致 ,方法的相对标准偏差RSD =2 6 %～ 4 4 %。     

脱氢枞酸及其衍生物生物活性的研究进展

脱氢枞酸是一种从松香中分离出来的具有三环二萜结构的树脂酸,具有广泛的生物活性,在医药、工业、农业等领域具有重要的用途。本文综述了脱氢枞酸衍生物在抑菌、抗病毒、K离子通道开启、抗肿瘤等生物活性方面的研究进展,展望了脱氢枞酸衍生物的研究和应用前景。     

氢化松香及其衍生物的制备研究进展

氢化松香是重要的天然可再生资源松香的深加工产品之一,在电子、食品、医药等领域有着重要的用途。本文介绍了氢化松香的主要组分、氢化松香国内外工业化生产历程及氢化松香制备工艺,特别是由贵金属钯和非贵金属镍为催化剂的制备工艺的研究现状;对近年来氢化松香和二氢枞酸衍生物,主要是以氢化松香为整体的衍生物的制备研究进行了综述,并对氢化松香及其衍生物研究前景进行了展望。     

光度法测定松脂中的铝

研究了用铝试剂,乙酸－乙酸铵缓冲溶液组织的体系以及光度法测定松脂微量铝的条件,提出了一种灵敏度、选择性与稳定性较好的测定松脂中铝的方法,在０－５０μｇ／５０ｍＬ范围内服从比耳定律。     

LaZSM-5分子筛催化合成松香甘油酯

研究了LaZSM-5分子筛对松香和甘油的催化酯化反应,探讨了各反应因素对酯化反应的影响,结果表明,LaZSM-5分子筛具有较高的催化活性。     

生物基环氧树脂及固化剂研究现状

生物基高分子材料以可再生资源为主要原料,它在减少塑料行业对石油资源消耗的同时,也减少了石油化工原料在生产过程中对环境的污染,具有节约石油资源和保护环境的双重功效。桐油和松香是我国两种重要的天然可再生资源,在目前将化工原料逐步转向可再生资源的时代背景下,它们已被广泛应用于高分子材料的合成和改性。生物基热固性树脂是一个意义重大且前景广阔的研究领域,本文就桐油和松香在生物基环氧树脂和固化剂方面的应用进行了系统的综述和展望。     

Microscopic morphology of blends between a new “all-acrylate” radial block copolymer and a rosin ester resin for pressure sensitive adhesives

With the goal of developing new pressure sensitive adhesive systems, the miscibility and the phase morphology of blends between novel symmetric four-arm star “all-acrylate” block copolymers synthesized by atom transfer radical polymerization (ATRP) and a rosin ester resin tackifier was studied with a combined differential scanning calorimetry (DSC) and atomic force microscopy (AFM) approach. Copolymer-resin compositions with increasing resin content in the blend were studied. The DSC results show good miscibility for compositions lower than 60 wt%, with a single glass transition at a temperature between those of the two pure compounds. The AFM results indicate that the initial two-phase morphology typical of the block copolymer matrix is preserved up to 60 wt% of resin. Above that value, a third phase, attributed to aggregates of the pure resin, is observed. Upon ageing, the homogeneous systems (e.g., blends with 40 wt% of resin) undergo a slow migration of the tackifying resin towards the surface of the sample, which can be understood in terms of surface free energy considerations. This eventually leads to the formation of a layer of pure resin at the surface.