以芦苇纤维作为增强体,以高密度聚乙烯(HDPE)和线性低密度聚乙烯(LLDPE)共混物作为基体,制备芦苇纤维/聚乙烯(PE)复合材料.探讨了芦苇纤维用量对复合材料力学性能以及微观结构的影响.结果表明:当LL-DPE和HDPE的质量比为30∶70、芦苇纤维用量为 30%时,所得复合材料的综合性能较好;静曲强度达到最高值25.9 MPa,较PE共混材料提升了12.1%;拉伸强度达到最高值22.3 MPa,较PE共混材料提升了14.4%;冲击强度为6.7 KJ·m-2.

Jilin Province is rich in maize straw resources, which are mainly concentrated in the main grain producing areas in the central and western regions. The combustion performance of maize straw collected from the east, middle and west of Jilin Province is analyzed. Its calorific value and ash content are measured and compared with that of wood. The results show that the calorific value of maize straw is more than 4 200 cal/g, which was equivalent to more than 90% of the calorific value of wood flour（4 680 cal/g）. The ash content of maize straw is very close to that of wood. The ash content of maize straw in the eastern region is slightly higher than that of wood, and the ash content of maize straw in the central and western regions is slightly lower than that of wood, which is basically the same. It can be seen that it is feasible to use maize straw instead of wood in the production of biomass granular fuel from the aspects of resource supply and combustion performance.

矿质生物基木塑复合材料是由木材、热塑性塑料和矿物质材料制备,研究木塑复合材料有利于节约木材资源,使废塑料得到合理利用.为了解提升矿质生物基木塑复合材料性能的研究进展,阐述常见的生物基木塑复合材料,总结无机矿质的添加对矿质生物基木塑复合材料性能的影响,并分析当前矿质生物基木塑复合材料应用中存在的问题,为矿质生物基复合材料的应用发展提供思路.

对吉林省不同地区常见的农作物剩余物进行抽样检测,检测其灰分值和燃烧值,进行区域性和种类差异性分析,并将结果和木材的性能进行对比,探索吉林省内农业剩余物资源用于颗粒燃料生产时产品性能和木材的理论差异.

介绍了一种新型红松球果采摘设备.该设备以无人机为主机,在主机之下悬垂一个机械手,通过主机与机械手上安装的两级高清摄像头,对红松球果进行识别与定位,然后通过地面飞手操控无人机和机械手,最终完成对红松球果剪切(采摘).

木材是一种主要由纤维素、半纤维素和木质素三种天然有机高分子构成的多孔性复杂天然有机物质.木材质轻、强度高、保温性好、纹理美观、易于加工、耗能低,可用于各种风格和形式的建筑,是其他建筑材料无法相比的.由木材加工制成的单板层积材是一种性能优良的人造板材,不但保留了许多天然实木材的优良性能,还具有结构均匀、强重比高、加工性能好等特点,且具有良好的尺寸稳定性和抗震减震性.单板层积材的研究开始于20世纪70年代初,应用范围十分的广泛.单板层积材可以制成各种规格,减少浪费和再加工工序;它的重量轻,可降低安装成本,提高施工安装速度.

自制秸秆表面处理剂,利用秸秆刨花板的生产原理制成芦苇秸秆板.根据性能指标分析,确定芦苇秸秆板较优的处理剂加量为40％、板材密度为0.75 g/cm3、施胶量为14％、热压温度为180℃、热压时间为210 s.研究表明,使用该处理剂生产芦苇秸秆板,静曲强度为15.8 MPa、弹性模量为3600 MPa、内结合强度为0.43 MPa、表面结合强度为1.20 MPa、2 h吸水厚度膨胀率为3.6％、板面握钉力为1200 N,达到国家标准要求.同时,其甲醛释放量为0.014 mg/m3,达到E1级.

玉米秸秆是一种重要的可再生生物质资源,但长期以来并未得到充分的开发利用.分别采用玉米秸秆皮粉和秆粉与矿石粉、聚氯乙烯( PVC)及其他助剂为原料,通过高温混合并挤出成型工艺制备生态环境友好型玉米秸秆矿质塑合材料JP与JQ,研究不同部位秸秆粉的不同添加量对矿质塑合材料吸水性、静曲强度、弹性模量的影响,并通过扫描电子显微镜对该材料的断面形貌进行观察.结果表明,添加不同部位玉米秸秆粉,材料的性能差异不明显,但随着玉米秸秆粉质量分数的增加,材料的吸水性增强,静曲强度和弹性模量均有下降.

以硼砂与磷酸混合制成无机阻燃剂,采用秸秆刨花板的生产原理制成阻燃秸秆板.根据性能指标分析,确定最佳无机阻燃剂配方.研究表明,使用该阻燃剂生产的阻燃秸秆板可以达到国家标准要求.

本文介绍了开发利用玉米秸秆矿质塑合材料的意义,对玉米秸秆矿质塑合材料与同类产品的特点和性能进行对比,并对其市场前景和经济效益进行了分析.

以玉米秸秆粉替代栓皮栎木栓质软木材料,研制软木复合矿质塑合材料地板生产技术,结果表明:玉米秸秆粉完全可替代木栓质软木材料来生产软木复合材料,秸秆粉添加量为3％时,按工艺生产的软木复合矿质塑合材料地板技术指标达到最理想效果,板材静曲强度≥15 MPa,弹性模量≥1500 MPa,24 h吸水厚度膨胀率≤1％,甲醛释放量达到E0级≤0.2 mg·L-1国际标准.

本文介绍了负离子释放材料的分类、组分及其功能,分析了以电气石为主要负离子添加剂的新型功能材料在建筑、纺织等领域的应用现状,对释放负离子功能材料发展前景进行展望.

在森林病虫害防治作业中使用的喷雾机种类繁杂,形式多样,用途不一.为了便于选型和使用,介绍了当前在森林病虫害防治作业中普遍应用的喷雾机种类、结构特点及应用条件.

Diatomite in Changbai Mountain region was treated with calcined and acid-treating to increase its purity. The crude diatomate and puridied diatomate were tested by measuring the specific surface area, we analyzed different calcination temperatures and sulfuric acid concentration on its specific surface area;The surface morphology and infrared spectrum of diatomite was characterized by scanning electron microscopy HITACHI S-3400 and infrared spectrometer FTIR-7600 so as to determine the best technology of purification, and provide technical support for diatomite comprehensive utilization in Changbai Mountain region.

For the two types of sprayers for forest disease and pest control,6HW30 sprayer and 6HW-12A sprayer,concerning the effect of the medicine box assembly on the stability of the whole machine and the anti-corrosion performance of the medicine box,the overall design plan of the medicine box is improved.The longitudinal stability of the main machine of the sprayer,6HW30 sprayer 6HW-12A sprayer and 6HW-12B sprayer is analyzed in this paper.Then the anti-corrosion performance of the medicine box with different materials,A3 steel,A3 steel brushed with anti-corrosion material and stainless steel,is tested.A3 steel does not have anti-corrosion performance,untreated A3 steel cannot be used as the material of the medicine box.The anti-corrosion performance of A3 steel brushed with anti-corrosion material can be maintained only for two years.The cost of 0Cr18Ni11Nb stainless steel is high,but its anti-corrosion performance is better.The results show that,for the three types of sprayers for forest disease and pest control,6HW30,6HW-12A and 6HW-12B sprayer,the stability of the whole machine of 6HW-12B sprayer and anti-corrosion performance of its medicine box are the best.

以甲醛与尿素加成反应的中间产物为载体,配合其他防火阻燃剂,通过加成和缩聚反应制取树脂型阻燃剂,利用单板层积材的生产原理制成阻燃单板层积材.根据各种性能指标分析,确定最佳树脂型阻燃剂配方.研究结果表明,使用该阻燃剂生产的阻燃单板层积材满足国家标准要求,并可降低甲醛释放量,提高板材强度.

以改性硅藻土为添加剂,采用常规热压成型方法研制新型多功能复合型改性中密度纤维板,结果表明:硅藻土用量控制在10%以内时,板材静曲强度、弹性模量、内结合强度、吸水厚度膨胀率都能达到国家标准相关要求;硅藻土添加量控制在10%为宜,达到E1级板材标准规定甲醛释放量≤9 mg·100 g-1的要求.新型中密度纤维板具阻燃、隔音、隔热、防水、质量轻和降低室内有毒气体等优点.

Design and performance of the program for 6HW-12B high-range sprayer driving stability are introduced,and the-oretical calculation of the overall stability is conducted.

A technique for enhancing the poplar veneer was studied in this paper.The results from the experiment of poplar veneer enhancing with styrene and methyl methacrylate by hot-pressing polymerization method showed that: the temperature for polymerization was the most critical factor,and the period and amount of initiator and aggregation promoting agents were also critical factors.The temperature for polymerization(x) was linearly correlated with the monomer conversion(y),and the equation was y=0.107x-0.036 7.The optimal technological process was: 80℃ for polymerization for 6 hours,the percentage of cobalt naphthenate,zinc chloride and AIBN initiator were 2%、6%、3%.The largest conversion was 64.5%.The analysis of fourier transform infrared spectroscopy showed that there large amount of benzene ring polymer in the enhanced poplar veneer,and the carbonyl-group remarkably increased.

The chemical components and their structures of Veratrum nigrum in Songjianghe region of Changbai Mountain were determined.Results showed that 2,3 methoxy cyclopamine,15 isovaleryl-3-acyl veratrine were the new-discovered among 32 compounds.There were 11 compounds separated from Veratrum nigrumt time,two of them could not be determined because of the low contents.