Microfibrillated lignocellulose biocomposites
Başlık çevirisi mevcut değil.
- Tez No: 717503
- Danışmanlar: DR. R. HUGH GONG, DR. XUQİNG LİU
- Tez Türü: Doktora
- Konular: Metalurji Mühendisliği, Metallurgical Engineering
- Anahtar Kelimeler: Belirtilmemiş.
- Yıl: 2021
- Dil: İngilizce
- Üniversite: The University of Manchester
- Enstitü: Yurtdışı Enstitü
- Ana Bilim Dalı: Belirtilmemiş.
- Bilim Dalı: Belirtilmemiş.
- Sayfa Sayısı: 147
Özet
Özet yok.
Özet (Çeviri)
Microfibrillated lignocellulose (MFLC) isolated from high lignin containing cellulosic sources is an alternative nanoscale reinforcing agent for the fabrication of polylactic acid (PLA) based biocomposites. This experimental study contributes to the fabrication of PLA based biocomposites reinforced with MFLC. The surface modification of MFLC was carried out using the acetylation approach in which two different acetyl donors were used, namely acetic anhydride and vinyl acetate. A high degree of surface substitution was achieved after the acetylation of MFLC using both acetyl donors. Further, the acetylation led to a significant improvement in the dispersibility of MFLC in organic solvents and PLA matrix. The mechanical test results showed that enhancements were achieved in the mechanical properties of PLA with the addition of acetylated MFLC (Ac-MFLC). Biocomposites exhibited maximum mechanical performance at the reinforcement level of 1 wt % Ac-MFLC, after which no further improvement was shown. MFLC exhibited similar reinforcements after acetylating with each acetyl donor. The theoretical modulus of biocomposites was also calculated by applying micromechanical models. SEM micrograph of the fracture surface showed that strong interfacial bonding was achieved between MFLC and PLA. Further, the increased crystallinity of PLA after the addition of Ac-MFLC led to significant enhancements in thermal stability, thermal properties and viscoelastic properties of biocomposites. The storage modulus, glass transition temperature and crystallisation rate of PLA considerably increased with the addition of Ac MFLC. In addition to the enhancement in the mechanical, thermal and viscoelastic properties, biocomposites exhibited a certain biodegradability under soil conditions. The surface acetylation of MFLC showed no significant impact on the degradation rate of biocomposites
Benzer Tezler
- Mikro/nano selüloz üretiminde enzimatik ön muamelenin etkisi
Effects of enzymatic pretreatment on micro/nano cellulose production
RECAİ ARSLAN
Yüksek Lisans
Türkçe
2017
KimyaDüzce ÜniversitesiOrman Endüstri Mühendisliği Ana Bilim Dalı
YRD. DOÇ. DR. AYHAN TOZLUOĞLU
- Nano ve mikrofibril selülozların kağıt üretiminde kullanımı ve kuartz kristal mikro terazi ile adsorpsiyon çalışmaları
Use of nano and micro fibrilated celluloses in papermaking and adsorption studies quartz crystal micro-balance with dissipation
GÜLİZ HOCAOĞLU
Yüksek Lisans
Türkçe
2015
KimyaKaradeniz Teknik ÜniversitesiOrman Endüstri Mühendisliği Ana Bilim Dalı
DOÇ. DR. SEDAT ONDARAL
- Çöktürülmüş ve öğütülmüş kalsiyum karbonat dolgu maddelerinin yüzey modifikasyonu
Surface modification of precipitated and ground calcium carbonate fillers
DOĞAN CANBOLAT
Yüksek Lisans
Türkçe
2023
KimyaKaradeniz Teknik ÜniversitesiLif ve Kağıt Teknolojisi Ana Bilim Dalı
PROF. DR. SEDAT ONDARAL
- PVA-GLYOXAL-NFC nanokompozitlerin üretimi ve karakterizasyonu
Production and characterization of PVA-GLYOXAL-NFC nanocomposides
ABDULTALİB KALCA
Yüksek Lisans
Türkçe
2022
Makine MühendisliğiRecep Tayyip Erdoğan ÜniversitesiMakine Mühendisliği Ana Bilim Dalı
DR. ÖĞR. ÜYESİ EVRİN TUĞAY