改性细菌纤维素/纳米氧化镁加固液增强纸质文献耐久性研究

Study on Improving the Durability of Aged Paper Documents by Silicification Modified Bacterial Cellulose/Nano-magnesia Oxide Reinforce Dispersion

关键词:  细菌纤维素  硅烷化  纳米氧化镁  纸质文献  耐久性

Key Words:bacterial cellulose  silylation  nano-magnesium oxide  paper document  durability

摘要:以细菌纤维素（BC）为加固基材，经3-氨丙基三乙氧基硅烷（APTES）化学改性，并与纳米氧化镁（MgO）复配，制得硅烷化细菌纤维素/纳米氧化镁（APTES-BC/MgO）加固液，并应用于加固纸张耐久性研究。湿热老化过程中，APTES-BC/MgO加固纸张的机械性能始终高于BC加固纸张及未加固纸张。经过湿热老化30天，APTES-BC/MgO加固纸张的横向撕裂指数和横向抗张指数仍分别比未加固纸张高29.6%和27.1%，pH值和碱储量分别为7.56和0.25 mol/kg，白度变化与色差最小。老化纸质文献经APTES-BC/MgO加固后具有较好的耐久性。

Abstract:Bacterial cellulose （BC） was used as the reinforcing substrate， chemically modified by 3-aminopropyltriethoxysilane （APTES） and compounded with nano-magnesium oxide （MgO） to produce silanized bacterial cellulose/nano-magnesium oxide （APTES-BC/MgO） reinforce dispersion， which were applied in the study of the durability of reinforced paper. The mechanical properties of APTES-BC/MgO reinforced paper were always higher than those of the BC reinforced paper and the unreinforced paper during the wet-heat aging process. After 30 days of hygrothermal aging test， the transverse tearing index and transverse tensile index of APTES-BC/MgO reinforced paper were still 29.6% and 27.1% higher than those of the unreinforced paper， and the pH value and alkali reserves were 7.56 and 0.25 mol/kg， respectively， with the least whiteness change and colour difference. The aged paper reinforced by APTES-BC/MgO exhibited the excellent durability.