【摘要】：基于碳素材料的自發(fā)熱復(fù)合材料是一種新型木質(zhì)材料,具有自發(fā)熱功能,主要應(yīng)用于發(fā)熱地板上,該材料的開發(fā)對節(jié)約能源、減少污染具有十分重要的意義。為了讓木質(zhì)材料具有自發(fā)熱功能,本文以木質(zhì)材料為主要原料,碳素材料為增強(qiáng)發(fā)熱材料,采用納米發(fā)熱技術(shù)和人造板技術(shù)相結(jié)合的工藝,制備自發(fā)熱木質(zhì)復(fù)合材料(石墨自發(fā)熱復(fù)合材料、碳?xì)肿园l(fā)熱復(fù)合材料、遠(yuǎn)紅外電熱油墨自發(fā)熱復(fù)合材料),并分別對三種自發(fā)熱材料的電熱性能進(jìn)行了研究。論文的主要研究結(jié)果有如下：(1)自發(fā)熱石墨/木質(zhì)復(fù)合材料最優(yōu)工藝：石墨粒度為300目,石墨加量為50%,鈦酸酯偶聯(lián)劑加量為5%,通過試驗發(fā)現(xiàn)在此條件下導(dǎo)熱性能最好,復(fù)合材料的導(dǎo)熱系數(shù)為0.0666W/m·K。當(dāng)輸入功率為20W時,通電15min后板面溫度達(dá)到36℃。(2)自發(fā)熱碳?xì)?木質(zhì)復(fù)合材料最優(yōu)工藝：3mm規(guī)格的碳?xì)种苽涞膹?fù)合材料,通過試驗發(fā)現(xiàn)在此條件下,材料的導(dǎo)熱性能以及電熱性能最好,測得材料的導(dǎo)熱系數(shù)為0.0858W/m·K。當(dāng)輸入功率為10W時,通電15min后板面溫度達(dá)到36℃；當(dāng)輸入功率為15W時,通電15min后板面溫度達(dá)到41℃；當(dāng)輸入功率為20W時,通電15min后板面溫度達(dá)到45℃。(3)自發(fā)熱遠(yuǎn)紅外電熱油墨/木質(zhì)復(fù)合材料：測試發(fā)現(xiàn)三種涂覆形試均可性,板面溫差較小,溫度分布較均勻,由于涂覆的形狀不同,同一功率下,不同涂覆形狀發(fā)熱情況也不盡相同。室溫下當(dāng)輸入功率為l0W時,通電15min后全涂覆的板面溫度達(dá)到31℃,條狀涂覆的板面溫度達(dá)到31℃,U型回路涂覆的板面溫度達(dá)到33℃；室溫下當(dāng)輸入功率為15W時,通電15rmin后全涂覆的板面溫度達(dá)到35℃,條狀涂覆的板面溫度達(dá)到36℃,U型回路涂覆的板面溫度達(dá)到36℃；室溫下當(dāng)輸入功率為20W時,通電15min后全涂覆的板面溫度達(dá)到38℃,條狀涂覆的板面溫度達(dá)到40℃,U型回路涂覆的板面溫度達(dá)到45℃。(4)以計算流體力學(xué)傳熱學(xué)為理論基礎(chǔ),利用Solidworks軟件建立了材料的結(jié)構(gòu)模型,并用Fluent軟件對升溫過程中材料的板面溫度變化進(jìn)行動態(tài)模擬仿真,將模擬結(jié)果與試驗測試數(shù)據(jù)進(jìn)行對比,結(jié)果基本一致,驗證了仿真模型的有效性。
[Abstract]:Self-heating composite based on carbon material is a new type of wood material, which has the function of self-heating and is mainly used on the heating floor. The development of this material is of great significance to save energy and reduce pollution. In order to make the wood material have the function of self-heating, this paper takes the wood material as the main raw material, the carbon material as the reinforced heating material, and adopts the technology of combining nano-heating technology and wood-based panel technology. Self-heating wood composites (graphite self-heating composites, carbon-felt self-heating composites, far-infrared electrothermal ink self-heating composites) were prepared, and the electrothermal properties of three kinds of self-heating materials were studied. The main results are as follows: (1) the optimum technology of self-heating graphite / wood composite is: graphite particle size is 300 mesh, graphite dosage is 50 and titanate coupling agent is 5. It is found that the thermal conductivity is the best under this condition. The thermal conductivity of the composite is 0.0666W/m K. When the input power is 20W, the surface temperature of the plate after electrified 15min reaches 36 鈩，

本文編號：2219818