本文選題：可食性膜 + 殼聚糖�。� 參考：《遼寧工程技術(shù)大學(xué)》2015年碩士論文

【摘要】：本文采用天然大分子多糖類物質(zhì)殼聚糖為主要的成膜材料,以甘油作為增塑劑,按比例添加香菇多糖,并通過(guò)共混、流延的方式制備一種新型的可食性復(fù)合膜。實(shí)驗(yàn)中以香菇多糖-殼聚糖復(fù)合膜的抗拉強(qiáng)度、斷裂延伸率、水蒸氣透過(guò)率、阻氧性和透明度為主要指標(biāo),經(jīng)Design Expert軟件進(jìn)行響應(yīng)面優(yōu)化后得到復(fù)合膜制備的最佳方法為：殼聚糖含量2.10%(質(zhì)量分?jǐn)?shù)),香菇多糖含量0.69%(質(zhì)量分?jǐn)?shù))和甘油含量19.12%(占?xì)ぞ厶桥c香菇多糖質(zhì)量和的百分比),在殼聚糖溶于1.5%乙酸溶液,香菇多糖溶于蒸餾水后,三者混合攪拌,并于60℃下干燥成膜。此條件下復(fù)合膜的抗拉強(qiáng)度為29.78MPa,斷裂延伸率為12.32%,水蒸氣透過(guò)率為3.427×10-11g/(m·s·Pa),阻氧性(以油脂過(guò)氧化值表示)為4.605g/100g,透明度為20.205%。由紅外光譜圖和X-射線衍射圖表征了添加香菇多糖后復(fù)合膜的相容性。結(jié)果顯示,香菇多糖的加入引起了復(fù)合膜特征吸收峰的遷移和強(qiáng)弱變化,使其衍射峰減弱甚至消失,表明用于制備復(fù)合膜的香菇多糖和殼聚糖之間存在著強(qiáng)烈的相互作用,各組分間有著一定程度的相容性。將可食性復(fù)合膜用于軟包裝材料,封口制袋的過(guò)程必不可少。分別對(duì)粘合劑(殼聚糖溶液)濃度、熱封溫度、熱封時(shí)間、熱封壓力對(duì)復(fù)合膜封合強(qiáng)度的影響進(jìn)行研究。又在單因素試驗(yàn)的基礎(chǔ)上,通過(guò)正交試驗(yàn)對(duì)封口工藝進(jìn)行優(yōu)化,結(jié)果得到,復(fù)合膜的最佳封合工藝：熱封溫度為140℃,熱封時(shí)間為3.5s,熱封壓力為0.3MPa,此時(shí)復(fù)合膜的封合強(qiáng)度可達(dá)12.03N/15mm。
[Abstract]:In this paper, chitosan, a natural macromolecular polysaccharide, was used as the main film-forming material, glycerin was used as plasticizer, lentinan was added in proportion, and a new edible composite membrane was prepared by blending and casting. The main indexes were tensile strength, elongation at break, water vapor transmittance, oxygen resistance and transparency of Lentinus edodes polysaccharide / chitosan composite membrane. The optimum preparation method of the composite membrane by Design Expert software is as follows: chitosan content 2.10 (mass fraction), lentinan content 0.69 (mass fraction) and glycerol content 19.12% (account for chitosan and lentinan polysaccharide quality and 100%). When chitosan was dissolved in 1.5% acetic acid solution, Lentinus edodes polysaccharides were dissolved in distilled water, mixed and stirred, and dried at 60 鈩，

本文編號(hào)：1852526