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href="http://www.cdcfah.com/cp/">產品供應</a>?<a href="http://www.cdcfah.com/cp/first-_xiangsu/">橡塑</a>?<a href="http://www.cdcfah.com/cp/second-xiangsu_gcsl/">工程塑料</a>?<a href="http://www.cdcfah.com/cp/third-gcsl_pla/">PLA</a>?湖南塑料降解膜標準廣東匯興環(huán)保材料供應</p><div id="2fcrdfm" class="leftbox clearfix"><h1>湖南塑料降解膜標準廣東匯興環(huán)保材料供應</h1><div id="mkcumdu" class="proBig"><div id="j8ugdac" class="bigimg"><div><p class="pic"><img src="https://tyunfile.71360.com/UploadFile/huixinghb/637254079271142578/7390182.jpg" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="kvrtvce" class="smallimg"><div><p class="pic"><img src="https://tyunfile.71360.com/UploadFile/huixinghb/637254079271142578/7390182.jpg" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="bpry3tn" class="content"><p><span>需求數量：</span>0</p><p><span>價格要求：</span>面議</p><p><span>所在地：</span>廣東省</p><p><span>包裝要求：</span><span style="color: #f30;"></span></p><p><span>產品關鍵詞：</span>湖南塑料降解膜標準</p><p><span>***更新：</span>2020-06-28 14:26:37</p><p><span id="click" >瀏覽次數：1次</span></p><a rel="nofollow" class="button">聯系我們</a></div></div><div id="slipefr" class="rightbox"><h3>公司基本資料信息</h3><p style="border:0;"><a rel="nofollow">廣東匯興環(huán)保材料有限公司</a></p><p><span>聯系人：</span>馮新科</p><p><span>郵箱: </span>sales@ti-bopp.com</p><p><span>電話: </span>18807695431</p><p><span>傳真: </span>0769_</p><p><span>網址: </span></p><p><span>手機: </span>0769-82275077</p><p><span>地址: </span>東坑鎮(zhèn)丁屋振興一路2號</p><p>[當前離線] <a rel="nofollow"> [加為商友] </a><a rel="nofollow"> [發(fā)送信件] </a></p></div></div><div id="sbdvcea" class="page-proshow02"><p class="title">詳細說明</p><div id="pd3ugx7" class="box"><p><p> <br /> </p> <p> 采用原位聚合的方法制備了有機化處理過的納米TiO2粒子質量分數分別為1 wt%，湖南塑料降解膜標準、3 wt%、5 wt%和10 wt%的4種納米TiO2/聚乳酸復合材料。SEM結果表明,當納米TiO2粒子質量分數較低時,納米TiO2在聚乳酸基體中呈現均勻穩(wěn)定分散,而質量分數較高時則發(fā)生團聚。通過力學和熱學等性能測試發(fā)現復合材料的比較大熱分解溫度、玻璃化轉變溫度和力學性能相對于聚乳酸有較大幅度提高,其中納米TiO2的質量分數為3 wt%時改善效果**明顯,其比較大熱分解溫度、玻璃化轉變溫度分別比聚乳酸提高了25.3℃和4，湖南塑料降解膜標準.9℃,拉伸強度、斷裂伸長率和彈性模量分別提高了83，湖南塑料降解膜標準.6%、6.73%和129.4%。 </p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="湖南塑料降解膜標準" src="https://tyunfile.71360.com/UploadFile/huixinghb/637254079271142578/7390182.jpg"></div><p style="text-indent:25px">為了保持果蔬的新鮮程度,延長其貯藏時間,常用冷藏、氣調、輻射等技術進行處理,但這些技術存在操作復雜,成本高等不足,而價格較低的市售保鮮膜則存在功能性差、污染環(huán)境等問題。本文采用靜電紡絲技術,以聚乳酸(PLA)為基材、高活性納米TiO2為添加材料,制備出TiO2/PLA復合納米纖維膜并探討了該材料在果蔬保鮮包裝領域中的潛在應用性。為制備出高活性的納米TiO2,采用水熱沉淀法以***鈦和尿素為原料進行合成。以甲基橙降解實驗測試納米TiO2的光催化活性,并對其進行X射線衍射儀(XRD)表征和超聲分散性能測試,結果表明:納米TiO2比較好的制備工藝參數為***鈦:尿素=1:4、反應溫度為180℃、反應時間為4h,所制備的TiO2是一種平均晶粒尺寸為13.76nm的銳鈦礦相晶體,其比較好的超聲分散功率為960W,時間為60min。為實現TiO2/PLA復合納米纖維膜的制備,先采用理論分析與實驗探究相結合的方式,確定了紡絲溶劑和紡絲工藝參數,制備出純PLA納米纖維膜,再采用TiO2與PLA共混溶液靜電紡絲的方式制備出TiO2/PLA復合納米纖維膜,</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="湖南塑料降解膜標準" src="https://tyunfile.71360.com/UploadFile/huixinghb/637254079272050782/1949522.jpg"></div><p style="text-indent:25px">本文對聚乳酸的合成方法及近年來聚乳酸基納米復合材料的研究進展進行了綜述,創(chuàng)新性地提出以L-乳酸和酸性硅溶膠(aSS)為原料的原位熔融縮聚法,制備了SiO_2含量為3.5％-19.1％的聚乳酸納米復合材料,并對聚乳酸/SiO_2納米復合材料的結構、透光率、熱性能和結晶性進行了較深入的研究。在L-乳酸熔融縮聚過程中,隨著聚乳酸分子量的提高,體系的極性發(fā)生明顯變化:由酸性單體的強極性/親水性變?yōu)榫廴樗岬娜鯓O性/親油性。本文選擇酸性硅溶膠(pH=2.5)與L-乳酸單體水溶液直接混合進行原位分散。由于二者均為強酸性、強極性,且均為水分散液,確保了SiO_2粒子的分散穩(wěn)定,且方便地實現了SiO_2粒子在L-乳酸單體中的均勻分散。在縮聚過程中而無機相SiO_2粒子表面分布有活性高的硅羥基,可以與L-乳酸單體(LLA)和乳酸齊聚物(OLLA)的羧基發(fā)生縮合反應,使OLLA接枝到SiO_2表面,隨著接枝反應的進行以及g-OLLA鏈的增長,無機相的極性也逐漸減弱,因而無機相表面也發(fā)生與有機相同步的極性變化；另一方面,g-OLLA在SiO_2粒子表面取代擴散雙電層形成保護層,提供了位阻效應。二者均起到了促進SiO_2粒子分散穩(wěn)定的作用,因此**終能得到SiO_2粒子在聚乳酸基體中納米級分散的聚乳酸/SiO_2納米復合材料。</p></p><br /><p>文章來源地址: http://www.cdcfah.com/cp/424272.html</p></div></div></div></div></div><div id="maxz8km" class="page-right twoColRt"><div id="hgda7ne" class="box01 margin10 clearfix"><h3><a href="http://www.cdcfah.com/cp/">猜你喜歡</a></h3><div id="edubq84" class="recomPic 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