In this work, Mulberry Stems (MS) obtained as a by-product of sericulture have been used as reinforcement for Polypropylene (PP) composites intended for green building, furniture and automotive applications. Mulberry stems are lignocellulosic and are renewable and sustainable sources but remain unutilized and are usually discarded as waste by burning or burying. An attempt has been made to utilize mulberry stems as substitutes for commonly used non-biodegradable composites using a simple and clean fabrication technique. The effects of reinforcement percentage (80% to 95% w/w) of MS and density (0.5 g cm⁻³ to 1.25 g cm⁻³) of composites on the properties have been studied. Results revealed that, 90/10 (MS/PP w/w %) was the optimum ratio that provides highest mechanical strength. Increasing the density enhanced the strength, thermal insulation, sound transmission loss, water stability and flame retardancy. The 1.25 g cm⁻³, 90/10 ratio composite had a high sound transmission loss of 46.6 dB and thermal conductivity of 0.130 W/mK which is 70% lower than neat gypsum board used in false ceiling applications. The high insulation and sound barrier properties of mulberry stem based composites are due to the unique hollow morphology of MS which aids in efficient absorbtion and dissipation of the thermal energy and sound waves. Weight loss of MS/PP composite after soil burial test for 120 days varied between 8.9% and 31.4%. MS/PP composites could be potentially used as a green replacement for ply, particleboards, false ceiling, automotive parts and other applications.

在这项工作中，作为蚕桑业副产品获得的桑树茎（MS）已被用作聚丙烯（PP）复合材料的增强材料，用于绿色建筑，家具和汽车应用。桑树茎是木质纤维素，是可再生和可持续的资源，但未被利用，通常通过焚烧或掩埋作为废物丢弃。已经尝试通过简单和干净的制造技术来利用桑树茎代替常用的不可生物降解的复合材料。MS的增强百分比（80％至95％w / w）和密度（0.5 g cm ^-3至1.25 g cm ^{-3）的影响}）对复合材料的性能进行了研究。结果表明，90/10（MS / PP w / w％）是提供最高机械强度的最佳比例。增加密度增强了强度，隔热性，传声损失，水稳定性和阻燃性。1.25克cm ^-3比率为90/10的复合材料具有46.6 dB的高传声损耗和0.130 W / mK的导热率，比假天花板应用中使用的纯石膏板低70％。桑树茎基复合材料的高隔热和隔音性能是由于MS独特的中空形态，有助于有效吸收和消散热能和声波。土壤埋藏试验120天后，MS / PP复合材料的失重在8.9％和31.4％之间变化。MS / PP复合材料可以潜在地用作层板，刨花板，假天花板，汽车零件和其他应用的绿色替代品。