本文關(guān)鍵詞：糯米粉基可降解復(fù)合材料的制備及性能研究　出處：《沈陽(yáng)工業(yè)大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

  更多相關(guān)文章： 糯米粉 ε-己內(nèi)酯 原位插層聚合 有機(jī)蒙脫土 納米復(fù)合材料

【摘要】：淀粉是一種來(lái)源廣、可再生、可降解的天然高分子，但是淀粉易吸水和不能熔融的缺點(diǎn)而限制其應(yīng)用。本論文用低結(jié)晶度的膨化糯米粉（PSt）、具有優(yōu)良性能和生物降解性的ε-己內(nèi)酯和層狀的有機(jī)化蒙脫土來(lái)制備糯米粉基可降解復(fù)合材料，該復(fù)合材料在通用材料、醫(yī)用材料領(lǐng)域有廣泛的應(yīng)用前景，并且能夠產(chǎn)生巨大的經(jīng)濟(jì)效益。 主要內(nèi)容和研究成果如下： 1.通過(guò)開環(huán)聚合的方法，以膨化糯米粉為骨架，ε-己內(nèi)酯為接枝單體，辛酸亞錫為催化劑，制備出具有熱塑性的膨化糯米粉接枝聚己內(nèi)酯（PSt-g-PCL）共聚物。確定出最佳投料為ε-己內(nèi)酯單體與膨化糯米粉的配比為3.3:（1mL/g），接枝率達(dá)到最大，為89.16%；DSC結(jié)果表明，PSt-g-PCL具有熱塑性，熔點(diǎn)為64.66℃；TGA結(jié)果表明，糯米粉接枝PCL后，PSt部分的熱分解溫度降低；XRD表明，PSt-g-PCL為一種結(jié)晶型聚合物；SEM表明，糯米粉接枝PCL后形成了新的形貌結(jié)構(gòu)。 2.通過(guò)原位插層聚合的方法制備出PSt-g-PCL/OMMT納米復(fù)合材料。DSC結(jié)果表明，OMMT對(duì)體系的結(jié)晶性有一定的影響，當(dāng)OMMT含量為5%時(shí)，，結(jié)晶溫度為35.49℃；XRD表明，當(dāng)體系中OMMT的量為15%時(shí)，層間距增大，原OMMT中2θ=4.90°的特征峰變寬，并且左移到2θ=4.70°，說(shuō)明PSt-g-PCL共聚物插入到了OMMT片層中；SEM結(jié)果表明，OMMT堆砌的片層結(jié)構(gòu)被破壞，形貌發(fā)生改變，這是因?yàn)镻St-g-PCL插入到OMMT的層間；TGA結(jié)果表明，加入OMMT后熱穩(wěn)定性提高，當(dāng)加入15%OMMT時(shí)，最大分解速率下的熱分解溫度為345.75℃（PSt段）和411.29℃（PCL段）。 3.采用熔融共混的方法制備出LDPE/EAA（/PSt-g-PCL/OMMT）三元共混復(fù)合材料，討論了不同添加量的乙烯-丙烯酸（EAA）（3%、5%、7%、9%和11%）對(duì)三元共混材料的影響。FT-IR結(jié)果表明，EAA中的C=O與PSt-g-PCL中殘存的羥基相互作用形成了氫鍵；DSC結(jié)果表明，LDPE與PSt-g-PCL/OMMT之間相容性較差，EAA的加入能夠改善各組分間的相容性；力學(xué)性能測(cè)試表明，隨著EAA的增多，拉伸強(qiáng)度下降，斷裂伸長(zhǎng)率增加。 4.討論了不同添加量的PSt-g-PCL/OMMT納米復(fù)合材料（7%、17%、27%和47%）對(duì)LDPE/EAA/（PSt-g-PCL/OMMT）三元共混復(fù)合材料性能的影響。力學(xué)性能表明，PSt-g-PCL/OMMT納米復(fù)合材料的加入使該三元共混復(fù)合材料的力學(xué)性能下降，當(dāng)添加量為17%時(shí)，綜合力學(xué)性能較好，拉伸強(qiáng)度為8.0Mpa，斷裂伸長(zhǎng)率為90.41%；SEM結(jié)果表明，PSt-g-PCL/OMMT納米復(fù)合材料的量為7%和17%時(shí)，該三元共混復(fù)合材料相容性較好；加入47%PSt-g-PCL/OMMT納米復(fù)合材料時(shí)，該三元共混材料的吸水率最大，為2.43%，有較好的耐水性，土埋降解100天后，質(zhì)量保持率為92.766%，說(shuō)明具有良好的生物降解性。 5. LDPE/EAA（/PSt-g-PCL/OMMT）與LDPE/EAA/PSt-g-PCL復(fù)合材料相比，OMMT的加入提高了三元共混復(fù)合材料的拉伸強(qiáng)度和耐水性，但是斷裂伸長(zhǎng)率和生物降解性下降。
[Abstract]:Starch is a kind of wide source, renewable, biodegradable natural polymer, but starch absorbent and can melt disadvantage limits its application. A low crystallinity of the puffed glutinous rice powder (PSt), with excellent properties and biodegradability of caprolactone and layered organic montmorillonite. Preparation of glutinous rice flour based degradable composite material, the composite material in general, the field of medical material has broad application prospects, and can produce enormous economic benefits.
The main contents and research results are as follows:
1. through the method of ring opening polymerization, using puffed rice powder as skeleton, caprolactone as grafting monomer and stannous octoate as catalyst, prepared with puffed glutinous rice powder graft thermoplastic polycaprolactone (PSt-g-PCL) copolymer. The optimum feeding for s-CAPROLACTONE monomer and puffing glutinous rice powder ratio is 3.3: (1mL/g), the grafting rate reached the maximum, 89.16% DSC; the results show that the PSt-g-PCL with thermoplastic, melting point of 64.66 DEG C; the results of TGA showed that the glutinous rice flour after grafting PCL, PSt part of the thermal decomposition temperature decreased; XRD showed that PSt-g-PCL is a crystalline polymer; SEM show PCL, glutinous rice powder grafting after the formation of the new structure.
2. by in situ intercalation polymerization PSt-g-PCL/OMMT composite was prepared by.DSC. The results showed that OMMT had a certain influence on the crystallization of the system, when the OMMT content is 5%, the crystallization temperature is 35.49 DEG C; XRD showed that when the system for 15% OMMT, the layer spacing increases, the original feature in OMMT peak 2 theta =4.90 degrees wide, and left to the 2 theta =4.70 degrees, PSt-g-PCL copolymer is inserted into the layers of OMMT; SEM results showed that the lamellar structure of OMMT stack is destroyed and the morphological change, this is because PSt-g-PCL is inserted into the interlayer of OMMT; TGA results show that the improved heat stability after joining OMMT, when 15%OMMT is added, the maximum decomposition rate of the thermal decomposition temperature of 345.75 DEG C (PSt) and 411.29 (PCL).
3. using the melt blending method to prepare LDPE/EAA (/PSt-g-PCL/OMMT) three element composites, discussed the different amount of ethylene acrylic acid (EAA) (3%, 5%, 7%, 9% and 11%). The results of.FT-IR of three yuan blends showed that the residual C=O and PSt-g-PCL EAA in hydroxyl each other the role of the formation of a hydrogen bond; DSC results showed that between LDPE and PSt-g-PCL/OMMT compatibility is bad, the addition of EAA can improve the compatibility between different components; mechanical properties test shows that with the increase of EAA, the tensile strength decreased and elongation increased.
4. discuss the different adding PSt-g-PCL/OMMT nano composite material amount (7%, 17%, 27% and 47%) of LDPE/EAA/ (PSt-g-PCL/OMMT) affects the performance of three yuan composites. The mechanical properties showed that adding PSt-g-PCL/OMMT nano composite materials will decrease the mechanical properties of the blends of three composite materials, when adding 17%, comprehensive good mechanical properties, tensile strength 8.0Mpa, elongation is 90.41%; the results of SEM showed that the PSt-g-PCL/OMMT nano composite material was 7% and 17%, the three yuan composite material has good compatibility; adding 47% PSt-g-PCL/OMMT nano composite materials, the water absorption of three yuan blends the maximum rate of 2.43%, water resistance well, after 100 days of soil degradation, maintain the quality rate of 92.766%, indicating good biodegradability.
Compared with LDPE/EAA/PSt-g-PCL composite, 5. LDPE/EAA (/PSt-g-PCL/OMMT) increased the tensile strength and water resistance of three LDPE/EAA/PSt-g-PCL composites, but the elongation at break and biodegradability decreased.

【學(xué)位授予單位】：沈陽(yáng)工業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TQ314.1;TB33

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