摘要
用α-淀粉酶对玉米原淀粉进行酶解预处理,酶解后的淀粉再通过2,2,6,6-四甲基哌啶-1-氧自由基(TEMPO)氧化体系进行改性,并将改性后的淀粉用作造纸表面施胶剂。研究发现,在pH值9.5、温度5℃、反应时间2.0 h、TEMPO用量1.0 mg/g、NaBr用量0.01 g/g、NaClO用量2.00 mmol/g的条件下,TEMPO/NaBr/NaClO体系氧化酶解淀粉可使改性淀粉的羧基含量为5.06%;将改性淀粉作为表面施胶剂,当表面施胶量为4 g/m2时,与未施胶原纸相比,纸张抗张强度和表面强度的增幅分别为51.6%和334%。
Corn starch enzymatic hydrolysis was carried out by using α-amylase, after enzymatic treatment, the starch was further oxidized by TEMPO oxidation system, then, the product was used for surface sizing. The experiment results indicated that the most efficient reaction con- dition of TEMPO system oxidation was as follows, pH value was 9.5, temperature was 5 ℃, reaction time was 2.0 h, dosage of TEMPO was 1.0 mg/g and the dosage of NaClO was 2.00 mmol/g. In this condition, tile modified starch had 5.06% of the carboxyl contents. Using the starch as surface sizing agent and with the sizing dosage of 4 g/m2, tensile strength and surface strength of sized sheet rose by 51.6% and 334% compared with the sheets without sizing.
出处
《中国造纸学报》
CAS
CSCD
北大核心
2012年第3期10-14,共5页
Transactions of China Pulp and Paper
基金
国家自然科学基金项目(30871955)
江苏高校优势学科建设工程资助项目(PAPD)
关键词
淀粉
酶解
TEMPO氧化
表面施胶
starch
enzymatic hydrolysis
TEMPO oxidation
surface sizing
