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onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="7xzbkqs" 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="23tlfhj" class="content"><p><span>需求數(shù)量：</span>0</p><p><span>價(jià)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(chǎn)品關(guān)鍵詞：</span>深圳降解膜標(biāo)準(zhǔn)</p><p><span>***更新：</span>2020-05-24 09:39:30</p><p><span id="click" >瀏覽次數(shù)：2次</span></p><a rel="nofollow" class="button">聯(lián)系我們</a></div></div><div id="d7sqyv3" 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(lián)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(wǎng)址: </span></p><p><span>手機(jī): </span>0769-82275077</p><p><span>地址: </span>東坑鎮(zhèn)丁屋振興一路2號(hào)</p><p>[當(dāng)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="m7wd328" class="page-proshow02"><p class="title">詳細(xì)說明</p><div id="tiu7xjq" class="box"><p><p style="text-indent:25px">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(fù)合材料,并對(duì)聚乳酸/SiO_2納米復(fù)合材料的結(jié)構(gòu)、透光率、熱性能和結(jié)晶性進(jìn)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(qiáng)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(jìn)行原位分散。由于二者均為強(qiáng)酸性、強(qiáng)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(shí)現(xiàn)了SiO_2粒子在L-乳酸單體中的均勻分散，深圳降解膜標(biāo)準(zhǔn)。在縮聚過程中,一方面有機(jī)相由于聚乳酸鏈的增長,使極性變?nèi)?而無機(jī)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(yīng),使OLLA接枝到SiO_2表面,隨著接枝反應(yīng)的進(jìn)行以及g-OLLA鏈的增長,無機(jī)相的極性也逐漸減弱,因而無機(jī)相表面也發(fā)生與有機(jī)相同步的極性變化；另一方面，深圳降解膜標(biāo)準(zhǔn),g-OLLA在SiO_2粒子表面取代擴(kuò)散雙電層形成保護(hù)層,提供了位阻效應(yīng)，深圳降解膜標(biāo)準(zhǔn)。二者均起到了促進(jìn)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(jí)分散的聚乳酸/SiO_2納米復(fù)合材料。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="深圳降解膜標(biāo)準(zhǔn)" src="https://tyunfile.71360.com/UploadFile/huixinghb/637254079271142578/7390182.jpg"></div><p> 可降解薄膜 </p> <p> [1] </p> <p> 既具有傳統(tǒng)塑料的功能和特性、又可在達(dá)到使用壽命之后，通過土壤和水中的微生物作用或通過陽光中的紫外線的作用，在自然環(huán)境中分裂降解，**終以還原形式重新進(jìn)入生態(tài)環(huán)境中，回歸大自然。國內(nèi)研發(fā)的品種已涵蓋光降解、光生物降解、光氧化生物降解、高淀粉含量型生物降解、高碳酸鈣填充型光氧降解、全生物降解等。其中**常用的是可食性薄膜和水溶性薄膜。 </p> 可食性包裝膜，如殼聚糖可食性包裝膜、玉米蛋白質(zhì)包裝膜、改性纖維素可食性包裝膜及復(fù)合型可食性包裝膜等，可以用于各種食品的內(nèi)包裝，如裹包糖果、黏性糕點(diǎn)的襯墊，或制成腸衣、果衣與膠囊等。它迎合了現(xiàn)代消費(fèi)快捷方便的趨勢(shì)，在食品行業(yè)中具有很大的市場。<div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="深圳降解膜標(biāo)準(zhǔn)" src="https://tyunfile.71360.com/UploadFile/huixinghb/637254079270058594/358771.jpg"></div><p style="text-indent:25px">本文對(duì)聚乳酸的合成方法及近年來聚乳酸基納米復(fù)合材料的研究進(jìn)展進(jìn)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(fù)合材料,并對(duì)聚乳酸/SiO_2納米復(fù)合材料的結(jié)構(gòu)、透光率、熱性能和結(jié)晶性進(jìn)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(qiáng)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(jìn)行原位分散。由于二者均為強(qiáng)酸性、強(qiáng)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(shí)現(xiàn)了SiO_2粒子在L-乳酸單體中的均勻分散。在縮聚過程中,一方面有機(jī)相由于聚乳酸鏈的增長,使極性變?nèi)?而無機(jī)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(yīng),使OLLA接枝到SiO_2表面,隨著接枝反應(yīng)的進(jìn)行以及g-OLLA鏈的增長,無機(jī)相的極性也逐漸減弱,因而無機(jī)相表面也發(fā)生與有機(jī)相同步的極性變化；</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="深圳降解膜標(biāo)準(zhǔn)" src="https://tyunfile.71360.com/UploadFile/huixinghb/637254079271083985/7719312.jpg"></div></p><br /><p>文章來源地址: http://www.cdcfah.com/cp/26342.html</p></div></div></div></div></div><div id="p2aczmz" class="page-right 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