熱壓初始水分對重載纖維模塑材料性能的影響
發(fā)布時間：2019-03-30 10:24
【摘要】：分別以楊木高得率漿(HYP)、楊木化學(xué)漿(CP)、廢紙板漿(WPP)為原料,研究熱壓初始水分含量(IMC)對重載纖維模塑材料性能的影響。依照Herzberg染色法和造紙原料化學(xué)分析的標(biāo)準(zhǔn)比較了纖維原料纖維種類和化學(xué)成分的異同,采用XPS、XRD和SEM表征手段系統(tǒng)比較了IMC對重載纖維模塑材料的化學(xué)組分、聚集態(tài)結(jié)構(gòu)以及微觀形貌的影響,同時考察了IMC對重載纖維模塑材料物理力學(xué)性能的影響。實驗結(jié)果表明,零壓干燥時,IMC增加導(dǎo)致WPP模塑材料密度與力學(xué)強度降低。在熱壓條件下,IMC的提高,促進膠黏性聚合物的生成,有助于改善HYP和CP模塑材料的結(jié)晶指數(shù),利于纖維細(xì)胞腔壓實和纖維間的緊密交織;IMC的提高,能夠顯著提高HYP、CP和WPP纖維模塑材料的密度和力學(xué)強度,IMC由10%增加到60%時,HYP、CP和WPP模塑材料的密度提高18.6%、23.8%和8.0%,拉伸強度提高119.74%、173.2%和168.3%,彎曲強度提高134.9%、140.2%和125.0%。
[Abstract]:The effect of the initial moisture content (IMC) of hot pressing on the properties of heavy-duty fiber molding materials was studied by using poplar high yield pulp (HYP),) (CP), waste paper pulp (WPP) as raw material. According to the standard of Herzberg staining and chemical analysis of papermaking raw materials, the similarities and differences of fiber types and chemical compositions of fiber raw materials were compared, and the chemical compositions of heavy-duty fiber molded materials were systematically compared by XPS,XRD and SEM, and the chemical compositions of heavy-duty fiber molded materials were compared by IMC. The effect of IMC on the physical and mechanical properties of heavy duty fiber molding materials was investigated. The experimental results show that the increase of IMC results in the decrease of density and mechanical strength of WPP molded materials under zero pressure drying. Under the condition of hot pressing, the increase of IMC promotes the formation of adhesive polymers, which helps to improve the crystallization index of HYP and CP molded materials, and is beneficial to the compacting of fibrous cells and the close interleaving of fibers. With the increase of IMC, the density and mechanical strength of HYP,CP and WPP fiber molded materials were significantly increased. When IMC increased from 10% to 60%, the density of HYP,CP and WPP molded materials increased by 18.6%, 23.8% and 8.0%, respectively, and the density of HYP,CP and WPP molded materials increased by 18.6%, 23.8% and 8.0%, respectively. The tensile strength increased by 119.74%, 173.2% and 168.3%, and the flexural strength increased by 134.9%, 140.2% and 125.0% respectively.
【作者單位】： 東北林業(yè)大學(xué)工程技術(shù)學(xué)院;東北林業(yè)大學(xué)材料科學(xué)與工程學(xué)院;
【基金】：中央高�；究蒲袠I(yè)務(wù)費專項資金(2572016AB69) 國家林業(yè)公益性行業(yè)科研專項(201304506)
【分類號】：TB302
本文編號：2450035
[Abstract]:The effect of the initial moisture content (IMC) of hot pressing on the properties of heavy-duty fiber molding materials was studied by using poplar high yield pulp (HYP),) (CP), waste paper pulp (WPP) as raw material. According to the standard of Herzberg staining and chemical analysis of papermaking raw materials, the similarities and differences of fiber types and chemical compositions of fiber raw materials were compared, and the chemical compositions of heavy-duty fiber molded materials were systematically compared by XPS,XRD and SEM, and the chemical compositions of heavy-duty fiber molded materials were compared by IMC. The effect of IMC on the physical and mechanical properties of heavy duty fiber molding materials was investigated. The experimental results show that the increase of IMC results in the decrease of density and mechanical strength of WPP molded materials under zero pressure drying. Under the condition of hot pressing, the increase of IMC promotes the formation of adhesive polymers, which helps to improve the crystallization index of HYP and CP molded materials, and is beneficial to the compacting of fibrous cells and the close interleaving of fibers. With the increase of IMC, the density and mechanical strength of HYP,CP and WPP fiber molded materials were significantly increased. When IMC increased from 10% to 60%, the density of HYP,CP and WPP molded materials increased by 18.6%, 23.8% and 8.0%, respectively, and the density of HYP,CP and WPP molded materials increased by 18.6%, 23.8% and 8.0%, respectively. The tensile strength increased by 119.74%, 173.2% and 168.3%, and the flexural strength increased by 134.9%, 140.2% and 125.0% respectively.
【作者單位】： 東北林業(yè)大學(xué)工程技術(shù)學(xué)院;東北林業(yè)大學(xué)材料科學(xué)與工程學(xué)院;
【基金】：中央高�；究蒲袠I(yè)務(wù)費專項資金(2572016AB69) 國家林業(yè)公益性行業(yè)科研專項(201304506)
【分類號】：TB302
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