本文關(guān)鍵詞：塑化淀粉分子結(jié)構(gòu)變化對生物質(zhì)復(fù)合材料力學(xué)性能的影響　出處：《北京化工大學(xué)學(xué)報(自然科學(xué)版)》2017年05期 　論文類型：期刊論文

  更多相關(guān)文章： 生物質(zhì)復(fù)合材料 塑化淀粉 分子結(jié)構(gòu) 結(jié)晶結(jié)構(gòu) 力學(xué)性能

【摘要】：植物纖維與淀粉結(jié)合制得用于包裝領(lǐng)域的新型植物纖維淀粉基生物質(zhì)復(fù)合材料,淀粉塑化改善了植物纖維淀粉基生物質(zhì)復(fù)合材料制品性能。為揭示塑化過程促使淀粉理化性能發(fā)生變化的深層機制,對塑化后淀粉的分子結(jié)構(gòu)變化展開研究。利用紅外光譜分析(FT-IR)和X射線衍射分析(XRD)對熱塑性淀粉內(nèi)部分子之間的氫鍵變化和結(jié)晶度進行分析表征,以研究塑化過程中淀粉分子官能團以及結(jié)晶結(jié)構(gòu)的變化,結(jié)果表明:塑化過程中淀粉結(jié)晶結(jié)構(gòu)發(fā)生變化,結(jié)晶區(qū)A型結(jié)晶遭到破壞;塑化劑與淀粉分子中的羥基之間形成了新的氫鍵,淀粉分子羥基官能團被削弱。力學(xué)性能測試表明,塑化使淀粉分子結(jié)構(gòu)發(fā)生變化后,由其制備的植物纖維淀粉基生物質(zhì)復(fù)合材料的抗拉、抗壓強度得到明顯提升,防水性得到改善。淀粉結(jié)晶區(qū)被打破,無定形區(qū)增多,淀粉更加緊密地附著在植物纖維表面,因此復(fù)合材料的抗拉等力學(xué)性能得到了明顯提升。防水性得到提高的原因在于塑化后淀粉鏈中親水的羥基被削弱,淀粉的紅外光譜分析中塑化淀粉的羥基伸縮振動峰減弱驗證了此結(jié)論。
[Abstract]:Plant fiber combined with starch prepared for new plant fiber and starch based biomass composite packaging, starch plasticizing improves the performance of plant fiber and starch based bio composite products. In order to reveal the underlying mechanism of Starch Physicochemical Properties to the plasticizing process changes, to study the molecular structure changes of starch plasticized by infrared spectroscopy. (FT-IR) and X ray diffraction (XRD) characterization of hydrogen bond and change between crystalline thermoplastic starch molecules, with the changes of starch molecules in the plasticizing process of functional groups in the crystalline structure and the results show that the change of crystal structure of starch plasticizing process, crystalline A crystal was damaged; the formation of hydrogen bonds between the plasticizer and the hydroxyl group of starch molecules, starch molecular hydroxyl groups was weakened. The mechanical properties test showed that the starch plasticized. The molecular structure changes, made of plant fiber and starch based bio composites prepared by its tensile strength, compressive strength has improved significantly, water resistance was improved. The starch crystalline region is broken, the amorphous region of starch increased, more closely attached on the surface of plant fiber, so the tensile mechanical properties obviously improve waterproof property is improved. The reason is that the plasticization of the starch chain hydrophilic hydroxyl groups are weakened, the infrared spectrum analysis of starch hydroxyl stretching vibration peak in plasticized starch decreased validates this conclusion.

【作者單位】： 山東大學(xué)機械工程學(xué)院高效潔凈機械制造教育部重點實驗室;
【基金】：國家自然科學(xué)基金(51275278)
【分類號】：TB332
【正文快照】： 引言在材料領(lǐng)域,基于可持續(xù)發(fā)展和環(huán)境保護兩方面的考慮,利用可再生的天然高分子材料為原料制備新型全降解綠色材料面臨著重要的發(fā)展機遇。植物纖維淀粉基生物質(zhì)復(fù)合材料是以植物纖維、淀粉為主要原料,加入少量添加劑,經(jīng)一次模壓發(fā)泡工藝制備而成[1-2],因其原料可再生、制品可，

本文編號：1417303