天然橡胶竹纤维弹性体模型构建及其影响因素

Model construction of natural rubber bamboo fiber elastomer and its influencing factors

采用天然橡胶直接喷涂在竹纤维上并经灭菌、定型制成弹力十足的竹纤维弹性体"植物弹簧",由该复合材料生产的植物纤维生态床垫具有天然环保、吸湿透气及睡眠舒适感佳等特点。将三维天然橡胶竹纤维材料视为数千万个卷曲的竹纤维弹性体,并构建了天然橡胶竹纤维弹性体模型。为验证模型的计算结果,拆解了天然橡胶竹纤维垫芯材料,并测定了卷曲竹纤维及天然橡胶竹纤维弹性体的力学性能参数。研究发现影响天然橡胶竹纤维垫芯材料弹性性能的因素包括竹纤维材料的直径、弹性模量等。实验测定表明:模型计算结果与实验值基本吻合,误差为13.5%。研究还发现,天然橡胶竹纤维复合材料的弹性系数K相比棕纤维床垫稍小,软硬度较适宜于人体睡眠习惯,其用作床垫垫芯材料具有良好的弹性性能和舒适的睡眠特性。该模型的建立为天然橡胶竹纤维复合材料产品的结构性能优化提供了技术支撑。

Natural rubber bamboo fiber composite material is a new type of composite material.It is made from directly spraying natural rubber on bamboo fibers and then being sterilized and finalized to form a bamboo fiber elastic body called“plant spring”.The plant fiber ecological mattress produced by this composite material has the advantages of the natural environmental protection,moisture absorption and breathability,and natural health care.It also has excellent features of deodorization,adsorption,anticorrosion,insect resistant moth,innocuity,no odor and good sleep comfort.Three-dimensional natural rubber bamboo fiber material is regarded as tens of thousands of curled bamboo fiber elastomers,and a natural rubber bamboo fiber elastomer model was developed.In order to verify the calculated results of the model,the natural rubber bamboo fiber mat core material was dismantled,and the mechanical properties of the curled bamboo fiber and the natural rubber bamboo fiber elastomer were measured.The factors affecting the elastic properties of the rubber bamboo fiber mat core material were analyzed,including the diameter,modulus of elasticity,Poisson s ratio,the density of single bamboo fiber,the number of materials and crimp of the core material.The experimental results showed that the calculated results agreed well with the experimental results,with an error of 13.5%.It was also found that the elastic coefficient(K)of the natural rubber bamboo fiber composite material was slightly lower than the brown fiber mattress,and the soft hardness was more suitable for the sleep habits of the human body.It can be used as a mattress pad material with good elastic properties and comfortable sleep characteristics.The implement of this model would provide technical support for the structural and performance optimization of natural rubber bamboo fiber composites.