可生物降解的阳离子淀粉絮凝剂

综述了淀粉大分子上悬挂不同类型胺基如伯，仲，叔以及季铵基基团的阳离子淀粉絮凝剂的制备方法和性能评价。并探讨了各种影响因素如化学结构，絮凝剂剂量，pH值，相对分子质量，胺基基团类型以及氮含量等对絮凝效果的影响。结果表明，在淀粉大分子上悬挂季铵基团的阳离子淀粉絮凝剂效果最好。     

新型固体淀粉胶粘剂的研究

介绍了一种新型固体淀粉胶，将淀粉加热催化，分步氧化，并加入聚乙烯醇树脂改善其性能，最后用硬脂酸钠为赋形剂制成固体产品。     

Graft polymerization of acrylonitrile onto starch‐coated polyethylene film surfaces

Starch‐coated polyethylene (PE) films were prepared by immersing PE in a hot, jet cooked solution of starch. They were allowed to react with acrylonitrile (AN) in the presence of ceric ammonium nitrate initiator, and the graft polymerization that occurred produced starch‐g‐polyacrylonitrile (PAN) coatings that contained about 25 wt % grafted PAN. The starch‐g‐PAN coatings tightly adhered to the PE film surfaces. When grafted starch coatings were wetted with water and the surfaces vigorously rubbed, less than 20% of the coating was removed. The fact that PAN‐grafted coatings were not removed with boiling water provided further evidence for their strong adherence. When starch was removed from the coating by acid hydrolysis, the residual grafted PAN still remained adsorbed on the PE surface. Because the grafted coating was completely removed by treatment with refluxing 0.7N sodium hydroxide, there is apparently no chemical bonding between starch‐g‐PAN and PE. The dimensional changes associated with the evaporation of water from these PAN‐grafted coatings caused the films to curl during drying. Because the final shape of these coated films depends upon the presence or absence of water in the surrounding environment, these films may be considered to be a type of stimulus‐responsive polymer. Attempts to graft polymerize methyl methacrylate and methyl acrylate onto starch‐coated PE surfaces, under conditions similar to those used with AN, were unsuccessful. © 2003 Wiley Periodicals, Inc. J Appl Polym Sci 89: 3323–3328, 2003     

环保型建筑内墙涂料的研制

研究聚乙烯醇胶和玉米淀粉胶及硼砂溶液按一定量复合而制得的建筑内墙涂料,测试各项性能指标,符合环保要求。讨论成膜助剂、分散剂、消泡剂、增稠剂用量对其性能的影响。     

新型脲-双醛淀粉黏合剂的制备

研究了由淀粉改性制成双醛淀粉作为含醛物料与尿素进行缩合的反应，由此合成出环保无毒的脲-双醛淀粉树脂黏合剂，并初步分析了该缩合反应的机理和影响因素。     

包醛酶淀粉吸附性能的研究

本文介绍了肠溶制剂包醛酶淀粉在尿素溶液中的吸附性能，以及溶液的浓度，ｐＨ值，吸附剂用量对吸附性能的影响。结果表明，包醛酶淀粉的吸附速度大于包醛氧淀粉，吸附容量大约是包醛氧淀粉的４倍，当溶液ｐＨ〈４时，随着ｐＨ值减小，对溶液中尿素的吸附力迅速降低。     

羟丙基淀粉绝干法工艺的研究

简述了传统羟丙基淀粉的湿法工艺和本厂的干法工艺,着重介绍了已工业化生产的绝干法工艺,并对其工艺原理进行了初步探讨。找出了醚化反应的适宜操作条件:淀粉含水量为7％～10％,催化剂粒度为0.18～0.30mm,反应温度<95℃。     

Physicomechanical and hydrophobic properties of starch foams extruded with different biodegradable polymers

Blends of hydroxypropylated high amylose starch and various functional aids listed below were extruded into foams using a twin‐screw extruder ZSK ‐ 30. In this study, the hydrophobic character and mechanical properties of starch foams were improved by using other biodegradable polymers, such as poly‐caprolactone (PCL), poly (butylene adipate‐co‐terephthalate) (PBAT), cellulose acetate (CA), methylated pectin (MP), and polyvinyl alcohol (PVA), and crosslinkers like glyoxal. The hydrophobic character was improved in terms of a reduction in steady state weight gain, and an increase in dimensional stability (reduction in loss of radial and longitudinal dimensions) on moisture sorption. At the same time, efforts were made to maximize the expansion ratios by reduction of unit densities. Formulations of these foams (in terms of additive content and other processing parameters) were optimized. Particular formulations with PVA, polyesters like PCL and PBAT, and glyoxal with PVA gave foams with unit densities lower than 25 kg/m³. The dimensional stability increased with an increase in the polyester content, but the density increased beyond an optimum polyester content, too. The loss in radial and longitudinal dimensions under steady state conditions was 12–20% with polyesters as compared to about 50–55% for control starch. Addition of these processing aids did decrease the water sensitivity of the starch foams. Foams with CA and methylated pectin, in the presence/absence of glyoxal, had marginally lower unit densities and slightly higher expansion ratios, as compared to those of control starch. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 102: 58–68, 2006     

炒制裸燕麦淀粉的提取及理化特性研究

通过单因素实验及正交试验,确定碱法提取炒制裸燕麦淀粉的最佳工艺,并测定其理化特性.结果表明,炒制裸燕麦淀粉较佳提取条件是料液比为1：18,pH值为9.5,提取温度为50℃,提取时间为60min.在此条件下,炒制裸燕麦淀粉提取率可达57.54%.理化特性研究表明,炒制裸燕麦淀粉中直链淀粉含量、蓝值及糊化温度均低于未炒制裸燕麦淀粉.     

燕麦酶解淀粉的吸湿性及其动力学研究

以燕麦淀粉为原料,采用耐高温α-淀粉酶水解制备不同水解度(DE值)样品,分析燕麦淀粉酶解前后各样品的吸湿性及其吸湿动力学。结果表明,酶解后的燕麦淀粉吸湿性较原淀粉有所增加,且DE值越大,吸湿性越强;用二级吸附动力学模型拟合样品在相对湿度(RH)为85%的环境中的吸湿动力学效果比较好,相关系数R2达0.999 8以上。