Overview
Dialdehyde starch (DAS) is a derivative of starch where hydroxyl groups are oxidized to aldehyde groups, typically using periodic acid. This modification enhances its reactivity and functional properties, making it valuable in industrial applications. It retains the biodegradability of starch while offering improved mechanical strength and chemical resistance. DAS is commonly produced from corn, potato, or tapioca starch. The degree of oxidation can be controlled to tailor its properties for specific uses, such as cross-linking agents or adhesives. Its eco-friendly profile has driven adoption in sustainable manufacturing processes.
Physical and Chemical Properties
Dialdehyde starch appears as a white to pale yellow powder with a density of approximately 1.5 g/cm³. It decomposes upon heating rather than melting, due to its polymeric structure. The material is highly soluble in water but insoluble in most organic solvents, facilitating its use in aqueous systems. Key chemical properties include its aldehyde content, which enables cross-linking with proteins or other polymers. The degree of oxidation (typically 20-90%) determines its reactivity. DAS also exhibits film-forming capabilities and low viscosity in solution, advantageous for coatings and adhesives.
Main Applications
In papermaking, DAS serves as a wet-strength additive, improving paper’s durability when wet. Its aldehyde groups bond with cellulose fibers, creating a resistant network. The textile industry uses it as a cross-linker for fabrics, enhancing crease resistance and dye fixation. DAS is also employed in medical materials, such as biodegradable scaffolds, due to its biocompatibility. Other uses include adhesives for plywood and encapsulation of fertilizers. Its versatility stems from tunable oxidation levels, allowing customization for diverse industrial needs.
Safety and Storage
Dialdehyde starch is generally non-toxic but may cause mild skin or eye irritation upon contact. Workers should use gloves and goggles when handling the powder. Avoid inhalation of dust, and ensure adequate ventilation in processing areas. Store DAS in a cool, dry place, sealed in moisture-proof containers. Prolonged exposure to humidity can degrade its quality. Shelf life typically exceeds 12 months under proper conditions. Dispose of waste according to local environmental regulations, as it is biodegradable but may require controlled decomposition.
B2B Procurement Guide
When sourcing dialdehyde starch, specify the degree of oxidation (e.g., 50% or 90%) to match your application. High-purity grades are critical for medical or food-contact uses. Request certificates of analysis (CoA) for aldehyde content and residual periodic acid levels. Bulk purchases (tonnage quantities) commonly range between $2.5-$5.0 per kg, depending on purity and supplier. Partner with manufacturers specializing in starch derivatives to ensure consistent quality. Sample testing is recommended to verify performance in your specific process.
Related Manufacturers
- 主营：叔碳酸、十八醛、溶菌酶、双醛淀粉、海藻糖、癸二醇、氨基丙基、氢路噻嗪、邻苯二甲、乙基碳二、羟基癸酸、正十七烷、谷胱甘肽、烷二甲醇、松果体素、vc磷酸酯镁、2-甲基丁醛、朱栾倍半萜、丁烷四乙酸、表面活性剂、癸烷撑二醇、缩水甘油邻、10-羟基羊蜡酸、氢氯噻嗪杂质、盐酸邻菲罗啉、壳聚糖季铵盐
- 主营：甘氨酸、水苏糖、阻燃剂、双醛淀粉、硫酸锌、硫酸锆、硫酸锂、硫酸锶、硫酸锰、铝酸锌、1680-21-3、牛磺酸、褪黑素、磷酸铁、丙酸铵、苏云金、碳酸镁、麝香酮、肉桂醛、磷酸铝、王浆酸、椰油胺、赖氨酸、增塑剂、浸膏粉、乙氧基
- 主营：架桥剂、YW100 锂萃取剂、端羧基液体丁腈橡胶、双醛淀粉、10-羟基癸酸、苯乙烯磷酸、肉豆蔻酸镁、硬脂酸钴、全氟三丁胺、乙烯基磷酸二乙酯、磷酸锰铁锂、β-磷酸三钙、十一烯酸、钨酸铝、1-乙炔基环已醇、间二异丙苯、锂硅合金、溴甲酚绿、生物活性玻璃、溴代海因树脂颗粒、红铝、龙涎酮、原丁酸三甲酯
- 主营：全氟三丁胺、二苄叉山梨醇、六氟丙烯二聚体、双醛淀粉、六氟环氧丙烷二聚体、异丙醇铝、纳米勃姆石、二异戊基硫醚、隐色结晶紫、邻菲罗啉
- 主营：有机原料、中间体、香精香料、催化剂、有机硅、表面活性剂
- 主营：全氟聚醚二醇、全氟三丁胺、聚硅氮烷、双醛淀粉、特种硅油、特种硅树脂
- 主营：甲酸镍、水苏糖、阻燃剂、双醛淀粉、柠檬醛、西瓜酮、氢醌酯、卡必醇、消泡剂、磷酸铁、肉桂醇、肉桂醛、碳酸镉、磷酸铝、银墨水、椰油胺、封装胶、化合物、桦木油、稀释剂、羟乙基、乙硫氮、润肤剂、球虫酯、矮壮素、异龙脑
- 主营：甘氨酸、甘氨酰、阻燃剂、双醛淀粉、甲醇钠、蒽甲酯、十八酸、溴壬烷、肉桂醇、葱油醇、肉桂醛、异丁酯、赖氨酸、叔丁醇、多佐胺、醛试剂、醇酯-12、乙氧基、脯氨酸、牛胆粉、癸酸酯、化合物、氟苯基、敏材料、氨酰胺、扁油酸
- 主营：乙酸龙脑酯、聚苯乙烯磺酸钠、乙基黄原酸钾、双醛淀粉、2-十一酮
- 主营：磺酰胺、氧化铌、除醛剂、硅化镱、基硅油、成核剂、酞菁钴、甘氨酸铬、光学树脂、鼠李糖脂、甲磺酸铋、氧化亚铁、封端硅油、左旋乳酸)、六水氯化钇、己基磺酸盐、恩诺沙星钠、二聚季戊四醇、聚醚硫酸酯钠、恶唑啉交联剂、洗手凝胶增稠剂、生物活性玻璃粉、氰基丙烯酸乙酯、脱硫脱氢催化剂
- 主营：全氟三丁胺、全氟三乙胺、全氟三丙胺、双醛淀粉、全氟聚醚、全氟萘烷、全氟己酮、羟基磷灰石、生物活性玻璃、布洛芬、溴壬烷、磷酸铵、甲乙基、褪黑素、嘧啶钠、莪术油、显色剂、叔丁醇、茜素红、乙氧基、异戊醇、脯氨酸、茚三酮、氯唑沙
- 主营：化工中间体、有机中间体、香精香料、双醛淀粉、添加剂、表面活性剂、天然/合成树脂、分析试剂、日化原料、催化剂、高分子材料
- 主营：氯菊酯、转移剂、聚酯树脂、乙烯基双封头、二甲氧基、驱蚊原液、食品香料、缩水甘油酯、蚊香增效剂、丙烯酸缩水、环氧稀释剂、硅烷偶联剂、超疏水材料、对甲氧基苯酚、对羟基苯甲醚、苯基缩水甘油醚
- 主营：聚乙烯胺、烯丙基磺酸钠、糖精钠 128-44-9、70693-62-8 过硫酸氢钾、水杨酸钠 54-21-7、硫化钴 12013-10-4、分析标准品、催化剂及助剂
- 主营：化工原料、中间体、表面活性剂、香精香料、催化剂、硅油