CAJ | 학술논문

为研究纤维素-壳聚糖共聚产物对石质文物封护保护的可行性,采用自由基聚合法,以过硫酸钾为引发剂,将醋酸丁酸纤维素（CAB）与壳聚糖进行接枝共聚,制备了纤维素-壳聚糖接枝共聚物。同时研究了纤维素和壳聚糖接枝共聚反应的最佳条件：引发剂K2S2O8浓度1.5mmol/L,预处理温度40℃,时间2h,纤维素与壳聚糖的质量比为2：1,反应温度50℃,反应时间8h,交联剂0.12mL,总液体积100mL。分析了纤维素-壳聚糖用量对石质文物封护材料的性能影响,并且对石材试样进行模拟试验,测试分析了色差度、光泽度、接触角、附着力、透气性和耐老化等性能指标,并采用红外光谱、扫描电镜对试样进行表征。结果表明,经纤维素-壳聚糖接枝聚合物浓度为15%的封护材料保护后,石材试样保持了原有的质感、光泽、颜色,并且憎水性、耐老化性等性能得到了大幅提高,对石材试样具有良好的封护效果,为天然高分子在纸质文物保护中的应用开辟了广阔的前景。
위연구섬유소-각취당공취산물대석질문물봉호보호적가행성,채용자유기취합법,이과류산갑위인발제,장작산정산섬유소（CAB）여각취당진행접지공취,제비료섬유소-각취당접지공취물。동시연구료섬유소화각취당접지공취반응적최가조건：인발제K2S2O8농도1.5mmol/L,예처리온도40℃,시간2h,섬유소여각취당적질량비위2：1,반응온도50℃,반응시간8h,교련제0.12mL,총액체적100mL。분석료섬유소-각취당용량대석질문물봉호재료적성능영향,병차대석재시양진행모의시험,측시분석료색차도、광택도、접촉각、부착력、투기성화내노화등성능지표,병채용홍외광보、소묘전경대시양진행표정。결과표명,경섬유소-각취당접지취합물농도위15%적봉호재료보호후,석재시양보지료원유적질감、광택、안색,병차증수성、내노화성등성능득도료대폭제고,대석재시양구유량호적봉호효과,위천연고분자재지질문물보호중적응용개벽료엄활적전경。
The graft copolymerization from cellulose and chitosan to prepare antibiosis cellulose material for the protection of stone culture relics was reported. In the experimental process, potassium persulfate was used as the initiator, and the cellulose was graft -copolymerized with chitosan. The grafting conditions and their impact on grafting ratio of the cellulose and grafting efficiency of the chitosan were discussed. According to the results from experimental data, the optimum reaction conditions for graft copolymerization of the cellulose and chitosan were summarized as follows： the consistent concentration of potassium persuffate was 1.5mol/L, the pretreatment temperature and time was 40℃ and 2h respectively, the reaction temperature and time was 50℃ and 8h, the mass ratio of cellulose and chitosan was 2 ： 1 and the dosage of cross was 0.12ml, the volume of all liquid was 100ml. In the experiment, the effect of copolymer dosage on the properties of stone samples was investigated and analyses of the properties of chromatic aberration, luster, contact angle, coating film adhesion, gas permeability, and ultraviolet radiation repellence were carried out using infrared ray （IR） spectroscopy and scanning electron microscopy （SEM）. It was found that the stone samples treated by 15% product copolymerized from cellulose and chitosan glue contained its origin nature, glossiness and color. Meanwhile compared to the untreated stone samples, the contact angle of surface of the treated ones came up to 80°, the level of coating film adhesion was 1 and gas permeability was 1. 76μg（ m^2·d）^-1. After 500 hours of ultraviolet-irradiation, the contact angle of surface of the treated stone samples fell to 70°, so the ultraviolet radiation was considerable. It was proved that the product copolymerized from cellulose and chitosan has good effect on the protection of stone historic relic.