共查询到17条相似文献，搜索用时 562 毫秒
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张扬 《林业机械与木工设备》2014,(10)
采用载银壳聚糖对桦木薄木进行浸渍处理,分析了壳聚糖、载银壳聚糖、银离子浓度对处理后薄木的抗菌性和抗拉强度以及耐水性能的影响。研究结果表明：薄木经载银壳聚糖处理后,其抗菌性、横向抗拉强度及耐水性能都得到了显著增强。 相似文献
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不同抗菌剂对浸渍薄木抗菌性能影响的研究 总被引：2，自引：0，他引：2
采用纳米TiO_2、载银纳米TiO_2、木聚糖和水溶性壳聚糖等抗菌剂,按不同质量分数均匀分散到薄木浸渍用三聚氰胺甲醛树脂中,用含有抗菌剂的三聚氰胺甲醛树脂浸渍薄木。通过单因素试验分析不同抗菌剂及其浓度对浸渍薄木抗菌性能的影响,结果表明:在无光照的条件下,载银纳米TiO_2的抗菌性能最优;在有光照的条件下,载银纳米TiO_2、小粒径纳米TiO_2(15nm)均具有良好的抗菌特性。综合抗菌性能和经济指标,在无光照或光照较弱的条件下可采用载银纳米TiO_2作为抗菌剂,生产三聚氰胺甲醛树脂浸渍薄木饰面抗菌木质地板等;在有光照的条件下,可优先选用小粒径纳米TiO_2作为抗菌剂,生产三聚氰胺甲醛树脂浸渍薄木饰面抗菌百叶窗等。 相似文献
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聚丙烯与木纤维的复合研究 总被引：3，自引：1，他引：3
通过检测以木纤维和聚丙烯为原料制造的木塑复合材料的抗拉强度,研究了木纤维和聚丙烯的复合性能,并分析了木纤维与聚丙烯的质量比、马来酸酐改性聚丙烯及偶联剂对复合材料抗拉强度的影响.试验结果表明,当聚丙烯与木纤维的混合比为10∶3、偶联剂加入量约为聚丙烯质量的3%～5%时,木塑复合材料的抗拉性能最佳. 相似文献
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采用优质粉煤灰与高效减水剂 ,调整骨料级配等技术途径配制高性能混凝土 ,使水泥用量大幅度降低 ,从而减少水化热和收缩、徐变 ,使绿色高性能混凝土成功地应用于桥梁工程中。 相似文献
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添加丙纶纤维及其改性处理对木塑复合材料性能的影响 总被引：3，自引：0，他引：3
就木塑纤维复合材料组分中添加丙纶纤维和对丙纶纤维进行改性预处理,改性剂的种类及改性剂的添加方式等引起材料物理力学性能和成网性能、模压性能的变化进行了研究。试验表明：添加丙纶纤维有助于改善材料的成网性能,使之成为具有良好模压性能的材料;对丙纶纤维进行改性的预处理可提高复合材料的物理力学性能;改性剂添加到木纤维中的工艺过程比对丙纶纤维进行预处理的工艺过程简单,并可以达到对丙纶纤维进行预处理的相同效果。 相似文献
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聚丙烯纤维对木／塑纤维复合材料性能影响的初步研究 总被引：8，自引：2，他引：8
对木／塑纤维复合材料组分中添加聚丙烯纤维和对聚丙烯纤维进行预处理引起材料物理力学性能和模压性能的变化进行了研究。试验结果表明，添加聚丙烯纤维有助于改善材料的模压性能，但导致材料物理力学性能下降。对聚丙烯纤维进行预处理有助于提高复合材料物理力学性能。 相似文献
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聚丙烯比例对木塑复合材料性能的影响 总被引：3，自引：0，他引：3
通过正交试验,以木材纤维和废旧聚丙烯塑料为原料,异氰酸酯或马来酸酐作偶联剂,压制木材纤维/聚丙烯复合材料,研究聚丙烯(简称PP)用量对木塑复合材料性能的影响。结果表明,聚丙烯比例对复合材料的内结合强度、吸水厚度膨胀率、静曲强度和弹性模量有不同的影响。在热压时间、热压温度、复合材料密度相同的条件下,用异氰酸酯(简称MDI)作偶联剂,聚丙烯用量40%时复合材料的性能最佳;而用马来酸酐(简称MA)作偶联剂,聚丙烯用量50%时复合材料的性能最佳。 相似文献
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There is a growing desire to improve the properties and use of nonwood plant materials as supplements to wood materials for wood cement-bonded boards (WCBs). This study was conducted to determine the comparative properties of WCBs containing various amounts of discontinuous inorganic fiber materials, such as alkali-resistant glass fiber, normal glass fiber, mineral wool, and nonwood plant materials such as retted flax straw and wheat straw particles. Tested cement-bonded boards were made at wood/additive compositions of 100/0, 90/10, 80/20, 70/30, 60/40, and 50/50 (weight percentages). Seventy-eight laboratory-scale WCBs were produced. Various board properties, such as the modulus of rupture (MOR), internal bonding strength (IB), water absorption (WA), thickness swelling (TS), and linear expansion (LE), were studied. The test results showed that three types of discontinuous inorganic fiber used as reinforcing materials in composites significantly enhanced and modified the performance of WCBs. The mechanical properties and dimensional stability of cement-bonded board were significantly improved with increasing amounts of the additives. MOR and IB were increased; and WA, TS, and LE of boards were reduced by combination with the inorganic fiber materials. The results also indicated that combination with retted flax straw particles only slightly increased the MOR of boards, and wheat straw particles led to marked decreases in all the mechanical properties and the dimensional stability of WCBs.Part of this report was presented at the 50th Annual Meeting of the Japan Wood Research Society, Kyoto, April 2000 相似文献
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Summary An XPS (X-ray Photoelectron Spectroscopy), also known as ESCA (Electron Spectroscopy for Chemical Analysis) study of wood
fiber treated with maleated polypropylene was performed to obtain information on the chemical nature of wood fiber before
and after treatment. Wood fiber was treated in a high-intensity thermokinetic mixer with maleated polypropylene at different
loading level (relative to wood fiber weight). The XPS results showed that the treatment of maleated polypropylene increased
the hydrocarbon concentration of wood fiber, as indicated by the decrease in oxygen-carbon ratio, and the continuous increase
of the relative intensity of the component C1 in C1s signal. Based on these values, higher molecular weight maleated polypropylene
produced more hydrophobic wood fiber surface than lower molecular weight maleated polypropylene. The decrease in C4 carbon
type in C1s signal after treatment suggested that the esterification reaction between wood fiber and maleated polypropylene
had not ocurred under the experimental conditions used in this study.
Received 5 January 1997 相似文献