云南省召开大型林产工业会议

云南是我国林产工业产品和行业较齐全的省份之一,现已发展和形成了七大行业,即紫胶、松香、栲胶、锯材、胶合板、纤维板、刨花板。此外,还有松节油、活性炭、软木砖、单宁酸、桉叶油、松针粉、木片、纸浆、樟脑、水果涂料、紫胶色素、红花色素、紫胶蜡、蒎烯产品等。在工艺和设备方     

福建泉港区建设世界级石化基地

福建林产化工的发展具有自己的优势。福建林产化工初步建立了有一定规模、品种齐全的产业体系。以松香、松节油为重点产品，同时生产纸和纸板、栲胶、活性碳、紫胶、松焦油、桐油、天然香料以及二次加工产品：萜烯树脂、聚合松香、造纸施胶剂、松油醇、莰醇、樟脑等。全省有林化企业约50家，经济效益总体较好，出口创汇能力强。福建省松香产品的产量约6万t／a左右，松香松节油产品占林化产品总产值的很大一部分。     

热塑性树脂改性电子束固化复合材料环氧树脂基体

本发明涉及一类热塑性树脂改性电子束固化复合材料环氧树脂基体。在本发明中，该类环氧树脂体系主要由环氧树脂、光引发剂和热塑性树脂改性剂组成。光引发剂为碘盐或硫盐。改性剂为酚酞改性聚醚酮、酚酞改性聚醚砜以及环氧官能团封端热塑性工程塑料，经它们改性后的电子束固化环氧树脂为基体的碳纤维复合材料的韧性及纤维基体界面得到改善，     

热塑性树脂改性电子束固化复合材料环氧树脂基体

本发明涉及一类热塑性树脂改性电子柬固化复合材料环氧树脂基体。在本发明中，该类环氧树脂体系主要由环氧树脂、光引发剂和热塑性树脂改性剂组成。光引发剂为碘鎓盐或硫筠盐。改性剂为酚酞改性聚醚酮、酚酞改性聚醚砜以及环氧官能团封端热塑性工程塑料，经它们改性后的电子束固化环氧树脂为基体的碳纤维复合材料的韧性及纤维基体界面得到改善，     

三种树脂基复合材料在不同温度的性能研究

目前在耐高温树脂中能经受长期高温氧化的热固性树脂只有聚酰亚胺，作为耐高温树脂基体及其复合材料，本文研究了CF／聚酰亚胺复合材料在不同温度的力学性能和热性能。作为应用量大面广的树脂基体及其复合材料，本文研究了两种环氧基体及其CF／环氧复合材料和GF／环氧复合材料在不同温度的力学性能。研究结果表明，复合材料的耐热性主要取决于基体。基体耐热性高的，复合材料在高温也保持高强度。     

日可乐丽公司将增加耐热聚酰胺树脂生产能力

河南沁阳市天益化工有限公司自主开发成功TY系列双马型高性能聚酰亚胺树脂，该树脂具有高耐热性、较好的韧性、易溶于有机溶剂、良好的工艺性、优良的电性能、抗蠕变能力强等特点。聚酰亚胺树脂可用于配制耐高温胶粘剂，也可用做环氧树脂、酚醛树脂等耐热改性剂，还能用做高性能复合材料的基体树脂。广泛应用于电子覆铜板、玻纤／碳纤维复合材料、耐磨材料、电绝缘材料以及自润滑材料等领域。     

开发成功高性能聚酰亚胺树脂

河南沁阳市天益化工有限公司自主开发成功TY系列双马型高性能聚酰亚胺树脂，具有高耐热性、较好的韧性、易溶有机溶剂、良好的工艺性、优良电性能、抗蠕变能力强等特点。聚酰亚胺树脂可用于配制耐高温胶粘剂，也可用作环氧树脂、酚醛树脂等耐热改性剂，还能用作高性能复合材料的基体树脂。广泛应用于电子覆铜板、玻纤／碳纤维复合材料、耐磨材料、电绝缘材料、自润滑材料等领域。     

松香树脂对天然橡胶/聚酯纤维复合材料界面黏结性能的影响

研究了松香树脂对天然橡胶硫化性能、交联密度以及天然橡胶/聚酯纤维复合材料界面黏结性能的影响,阐述了松香树脂改善天然橡胶/聚酯纤维复合材料界面黏结强度的机理。结果表明,向天然橡胶中加入松香树脂可以延长其焦烧时间和提高交联密度;加入松香树脂可以明显改善天然橡胶/聚酯纤维复合材料的黏结强度,当松香树脂用量为3份时,复合材料的黏结强度达到最佳值。     

CEg基体及其纤维缠绕复合材料耐热性能研究

针对纤维缠绕的特点，对氰酸酯（CE）树脂进行了改性（改性后的氰酸酯树脂称为CEg基体），改性的目的是不仅使CE树脂适合纤维缠绕工艺，而且不降低纯CE树脂及其复合材料的耐热性能。通过实验摸索出适合纤维缠绕工艺的CEg基体配方及其工艺参数、固化参数。用SEM（扫描电镜）研究了T700／CE以及T700／CEg复合材料的剪切断口形貌；用TG／DTA研究了氰酸酯树脂改性前、后的复合材料热分解温度；用DSC研究了CE和CEg基体的玻璃化温度。研究结果表明：CEg基体最显著的特点是不仅使纤维缠绕工艺和固化工艺简单易行，而且不降低纯氰酸酯树脂及其复合材料的耐热性能。改性后的氰酸酯树脂可以充分发挥氰酸酯树脂的耐高温优势，这是本研究的特点，达到了预期的效果。     

双马来酰亚胺树脂/二胺体系溶解性改性研究

在二胺改性双马来酰亚胺树脂中加入少量改性剂A可制得1种能溶于丙酮的双马来酰亚胺树脂。研究结果表明,室温下该预聚体在丙酮中具有优良的溶解性及良好的贮存稳定性。预聚体可配成质量分数为58%~70%溶液,下限临界质量分数Wc<31.3%,满足复合材料基体浸渍液的浓度要求。此外,该预聚体具有较高的反应性能和耐热性,有望用作高性能复合材料的候选基体树脂。     

Thermal and mechanical properties of woodflour/tannin adhesive composites

Composite materials formulated with a natural polyphenolic matrix (commercial tannin adhesive made from quebracho tannin extract), pine woodflour as reinforcing material, and hexamethylenetetramine as hardener were prepared and tested. Scanning electron microscopy of fractured samples was used to analyze the efficiency of the wetting and adhesion of the filler to the surrounding matrix. Thermogravimetric analysis was used in the thermal characterization of the woodflour and the tannin extract. Flexural, compression, and dynamic‐mechanical tests were performed on composites to study the relationship of the filler content and particle size with the composite final properties. Moreover, the influence of the moisture content on the physical and mechanical properties of the different composites was analyzed. Results indicated that the mechanical properties were severely affected by the absorbed moisture. © 2004 Wiley Periodicals, Inc. J Appl Polym Sci 91: 3074–3082, 2004     

石墨烯铜基复合材料制备与强化机制研究进展

铜基材料的强度与电导率互相矛盾，其已成为高端铜材研发的关键技术瓶颈。石墨烯因其独特的结构和性质，可作为铜基材料理想的增强体，可显著提高材料的力学性能。为此，针对国内外相关研究现状，详细阐述了当前石墨烯铜基复合材料的制备方法，即粉末冶金法、分子水平混合法、化学气相沉积法以及电化学沉积法等。同时，对石墨烯在铜基复合材料中的强化机理做出解释，并提出相应的计算公式进行量化处理，以便于将实验值与理论值进行对比。最后，对未来石墨烯铜基复合材料的性能改进（包括高质量单层石墨烯制备）和石墨烯-铜取向结晶一致进行了展望。     

我国主要林化产业的现状和发展

文章介绍了我国主要林化产业的现状与发展,阐述了我国松香、植物单宁及活性炭的生产与研究状况。林化产业在我国民经济中居于重要地位,在国际市场上也占有相当份额。     

Radial diffusion method for determining tannin in plant extracts

Tannin in plant extracts can be determined by reacting the tannin with a protein and quantitating the precipitated complex. In the new assay described here, a tannin-containing solution is placed in a well in a protein-containing agar slab. As the tannin diffuses into the gel and complexes with protein, a visible ring of precipitation develops. The area of the ring is proportional to the amount of tannin in the extract. The detection limit of the method is 0.025 mg tannic acid or condensed tannin and the precision is 6% (relative standard deviation). Tests with extracts of a variety of plants show that the new method gives results comparable to other precipitation methods and that the new method is superior for samples of unusual composition, such as aspen buds. The method has several advantages over other methods for determining tannin: The new method is very simple and requires neither complex reagents nor instruments. Components of the plant extract such as non-tannin phenolics or water-insoluble compounds do not interfere with the method. The assay is not subject to interference from the organic and aqueous solutions which are commonly used to extract tannin from plants.     

Reinforcing and Flame-Retardant Effects of Halloysite Nanotubes on LLDPE

Halloysite nanotubes (HNTs) were used to compound with linear low density polyethylene (LLDPE) to prepare composites with better mechanical properties and higher flame retardancy. The PE graft was used as interfacial modifier in the LLDPE/HNTs composites. HNTs were showed to be a promising reinforcing and flame retardant nano-filler for LLDPE. The mechanical properties and flame retardancy as well as thermal stability of the composites can be further enhanced by the addition of the graft copolymer. Morphological observation revealed that the graft copolymer could facilitate the dispersion of HNTs in LLDPE matrix and enhance the interfacial bonding.     

磺化改性栲胶渣的稀释作用

林佛工产品－栲胶生产过程中产生的栲胶渣，具有一定的表面活性作用，活性不高，但经磺化改性后，其溶解性质发生改变，对湿法水泥生料浆和稀释作用，实验测定了它们的稀释效果。     

Microporous Composites Prepared by Coagulation of a CS/PEG Solution in NaOH

Novel biodegradable three-dimensional composites with a porous structure have been prepared by coagulation of a chitosan (CS)/poly ethylene glycol (PEG) solution in NaOH. It is confirmed that PEG acts not only as a modifier to improve the mechanical properties, but also as a porogen for the CS matrix to induce porous structure. The porous structure and mechanical properties of the composites can be tailored with the amount of PEG and glutaraldehyde (GA). The addition of GA can improve the interaction strength and compatibility between the PEG phase and CS matrix. The resulting composites have smaller pore size, lower porosity, and better mechanical properties.     

Polymer blends, 3. Preparation and evaluation of the blends of shellac with polyamideimide from rosin

Polymer blends were prepared from shellac and polyamideimide. The polyamideimide was synthesized by reacting rosin maleic anhydride Diels-Alder adduct with 4,4′-diamino diphenylmethane. The compatibility of these blends was studied by solubility parameter, heat of mixing data, solution viscosity, and differential scanning calorimetry. It was found that the composition of 40 : 60, shellac : polyamideimide produces a compatible blend. The thermal behaviour of the blends was investigated.     

超分散剂对塑木复合材料性能的影响

以松香、二乙撑三胺和12-羟基硬脂酸为原料,合成了松香超分散剂(RDH)。用RDH对高密度聚乙烯塑木复合材料进行改性,研究了RDH对塑木复合材料力学性能、热性能等的影响,并用扫描电镜(SEM)观察复合材料的冲击断面形貌。结果表明:经RDH改性后,塑木复合材料的冲击强度和弯曲强度分别提高了35.2%和21.5%。RDH的加入改善了复合材料的热稳定性,储能模量提高,损耗因子降低。     

Effect of nanoclay on the properties of rosin derivative cross-linked green composite based on chicken feather fiber and modified vegetable oil

Fully biodegradable composites based on waste chicken feather fiber (CF), functionalized epoxidized soybean oil (ESO), rosin derivative and various nanoclay percentages were prepared via compression molding. Rosin derivative was synthesized as a substitute of styrene/divinylbenzene. Nuclear magnetic resonance and Fourier transform infrared spectroscopy confirmed the synthesized rosin derivatives structures. Delamination and distribution of silicate layers were studied by X-ray diffraction and transmission electron microscopy. Scanning electron microscopy was used to analyse compatibility among modified ESO and rosin. FTIR study revealed the interaction between resin, CF, rosin derivative, and nanoclay. The nanoclay loaded composites showed better mechanical properties than the nanoclay free composite. The thermal stability of nanoclay loaded composites were also found to be enhanced. Composites loaded with nanoclay (3 wt%) revealed the least chemical resistance, volumetric swelling and water vapor uptake capacity.