CN116920075A - 一种肠内营养液及其制备方法 - Google Patents

一种肠内营养液及其制备方法 Download PDF

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CN116920075A
CN116920075A CN202311188259.9A CN202311188259A CN116920075A CN 116920075 A CN116920075 A CN 116920075A CN 202311188259 A CN202311188259 A CN 202311188259A CN 116920075 A CN116920075 A CN 116920075A
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parts
embedding
vitamin
liquid
solution
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CN116920075B (zh
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张霞
张国华
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Weifang Gefei Biotechnology Co ltd
Weifang People's Hospital Weifang Public Health Clinical Center
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Abstract

本发明提供一种肠内营养液及其制备方法,属于肠内营养液领域。所述肠内营养液的制备方法,由以下步骤组成:一次改性、二次改性、包埋、制液。本发明的肠内营养液,对肠胃刺激性低,有效避免较高给药流速条件下,可能导致的胃潴留及其他肠胃并发症;能够有效抑制胃管内壁微生物的滋生,延长胃管的有效使用寿命;同时,有效提高肠内营养液的长期储存性能。

Description

一种肠内营养液及其制备方法
技术领域
本发明涉及肠内营养液领域,尤其是涉及一种肠内营养液及其制备方法。
背景技术
肠内营养液,又名肠内营养混悬液,英文名称为Enteral NutritionalSuspension(TPF)。肠内营养液为复方制剂,其主要成分主要包括有水、碳水化合物、蛋白质、脂肪、维生素、矿物质和微量元素等人体必需的营养物质。肠内营养液适用于有胃肠道功能或部分胃肠道功能,但无法或不愿进食足够数量常规食物的病人。通常情况下,患有慢性病、重伤、严重感染、器官衰竭、食欲不振、营养物质消化不足、肌肉萎缩、脏器或免疫系统退化、术后感染风险高、伤口愈合延迟及贫血等情况,均可以采用肠内营养液。现有技术认为,肠内营养是一种安全、高效、经济的营养补给形式,可以在人体消化功能基本正常时使用。
肠内营养液一般是通过胃管(从鼻子导入至胃或肠的导管)进行输送,给药流速一般为100-125mL/h,以进行短期的营养支持。肠内营养液的施用时间一般为数天,最长为2个月,可以在病人病情得到改善时,经医生评估后停止肠内营养液的施用。
但是,现有的肠内营养液对肠胃具有一定的刺激性,特别是在给药流速为115-125mL/h时,会刺激人体肠胃蠕动加速,可能导致胃潴留及其他肠胃并发症的发生。同时,为缩减肠内营养液体积,提高单位体积肠内营养液内营养含量及能量密度,肠内营养液通常含有较多的蛋白质、脂肪,其形状较为粘稠,施药过程中,易在胃管内壁残留,进而易于微生物的滋生,影响胃管的有效使用寿命,增加病人拔除胃管、重新插管的次数。进一步的,现有的肠内营养液长期储存后浓度不均匀,存在有分层、沉淀及粘壁问题,长期储存性能有待进一步提升。
发明内容
为解决现有技术中存在的技术问题,本发明提供一种肠内营养液及其制备方法,所述的肠内营养液对肠胃刺激性低,有效避免较高给药流速条件下,可能导致的胃潴留及其他肠胃并发症;能够有效抑制胃管内壁微生物的滋生,延长胃管的有效使用寿命;同时,有效提高肠内营养液的长期储存性能。
为解决以上技术问题,本发明采取的技术方案如下:
一种肠内营养液的制备方法,由以下步骤组成:一次改性、二次改性、包埋、制液。
所述一次改性,将羧甲基壳聚糖投入至4-6倍重量份的过氧化氢溶液中,搅拌2-4h后,继续投入4-6倍体积的过氧化氢溶液,升温至30-40℃,保温搅拌10-12h后;调节pH至中性,获得一次改性液;搅拌条件下,以6-10mL/min的滴加速率,将一次改性液滴加至4-6倍体积的乙醇溶液中,滴加完成后,继续搅拌1-3h,静置30-60min,滤出固体物;采用3-5倍体积的乙醇溶液洗涤固体物2-3次后,转入真空度为0.01-0.03MPa环境下,升温至50-60℃,保温干燥至重量无变化,制得一次改性物。
所述一次改性中,乙醇溶液的浓度为85-95%(体积百分数);
过氧化氢溶液的浓度为2-3wt%。
所述二次改性,搅拌条件下,将一次改性物投入至二次改性液中,升温至30-40℃,保温搅拌2-4h后,以5-8mL/min的滴加速率,滴加至2-3倍体积的乙醇溶液中,滴加完成后,搅拌1-3h,静置30-60min,滤出固体物;采用3-5倍体积的乙醇溶液洗涤固体物2-3次后,转入真空度为0.01-0.03MPa环境下,升温至50-60℃,保温干燥至重量无变化,制得二次改性物。
所述二次改性中,一次改性物和二次改性液的重量份比值为5-7:100;
乙醇溶液的浓度为85-95%(体积百分数)。
二次改性液的制备方法为,将硫酸锌、硫酸铜投入至去离子水中,完全溶解制得。二次改性液中,硫酸锌浓度为0.08-0.1mol/L,硫酸铜浓度为0.01-0.015mol/L。
所述包埋,将二次改性物、三丁酸甘油酯、鱼油、红藤提取物、聚山梨酯-80投入至去离子水中,升温至30-40℃,保温搅拌20-30min,制得乳化液;将γ-环糊精和麦芽糊精投入至去离子水中,升温至50-60℃,保温搅拌20-40min,制得包埋液;将乳化液投入至2-3倍体积的包埋液中,超声分散30-50min后,置于3-5℃温度环境下,静置3-5h后,滤出固体物,在真空度为0.01-0.03MPa环境下,升温至50-60℃,保温干燥至重量无变化,制得包埋物。
所述包埋中,乳化液中二次改性物、三丁酸甘油酯、鱼油、红藤提取物、聚山梨酯-80、去离子水的重量份比值为2-3:1-1.5:3-4:1.5-2:0.1-0.15:40-45;
包埋液中γ-环糊精、麦芽糊精、去离子水的重量份比值为3-5:12-18:80-90。
所述包埋中,超声分散的频率为20-25kHz,超声功率为450-600W;
鱼油中n-3多不饱和脂肪酸含量为50-60wt%;
红藤提取物的粒径规格为90-100目,提取比例为10-20:1。
所述制液,将浓缩乳清蛋白、酪蛋白酸钠、包埋物、谷氨酰胺、菜籽油、卵磷脂、营养素、矿物质、对羟基苯甲酸甲酯混合,3000-4000rpm均质10-15min后,采用柠檬酸调节pH值至6.5-6.8,继续均质3-5min,经辐照灭菌,加去离子水稀释,制得肠内营养液。
所述营养素,按重量份计,由以下成分组成:0.8-0.9份维生素A,1.5-1.8份维生素B1,1.8-2.0份维生素B2,13-15份维生素B3,1.8-2.0份维生素B6,0.005-0.008份维生素B12,100-120份维生素C,0.01-0.02份维生素D,0.02-0.03份维生素E,0.07-0.08份维生素K,8-8.5份泛酸,0.24-0.26份叶酸,0.06-0.07份生物素,110-120份牛磺酸。
所述矿物质,按重量份计,由以下成分组成:0.9-1.1份硫酸钠,1.6-1.8份碘化钾,0.9-1.0份磷酸钙,0.2-0.23份硫酸镁,0.02-0.025份硫酸亚铁,0.03-0.035份硫酸锰。
一种肠内营养液,采用前述的制备方法制得;每升肠内营养液中,含有浓缩乳清蛋白8-12g、酪蛋白酸钠8-12g、包埋物80-90g、谷氨酰胺40-45g、菜籽油20-25g、卵磷脂2-3g、营养素3-4g、矿物质1.5-2.5g、对羟基苯甲酸甲酯0.03-0.04g。
与现有技术相比,本发明的有益效果为:
(1)本发明的肠内营养液的制备方法,通过一次改性中,采用过氧化氢对羧甲基壳聚糖进行降解改性;然后在二次改性中,采用特定的二次改性液,对一次改性物进行二次改性;在包埋中,通过特定组成的乳化液、包埋液制备包埋物;在制液中,对特定组成的原料进行均质、灭菌、稀释处理,制得的肠内营养液对肠胃刺激性低,有效避免较高给药流速条件下,可能导致的胃潴留及其他肠胃并发症;能够有效抑制胃管内壁微生物的滋生,延长胃管的有效使用寿命;同时,有效提高肠内营养液的长期储存性能。
(2)本发明的肠内营养液,经大白鼠灌胃试验表明,在高给药流速条件下,有效避免胃潴留及其他肠胃并发症的发生;且连续灌胃7天后,大白鼠胃粘膜和肠粘膜完整,无病理变化,肠胃刺激性小。
(3)本发明的肠内营养液,能够有效抑制胃管内壁微生物的滋生,延长胃管的有效使用寿命;经试验,接种有100CFU的白色念珠菌的硅胶胃管,灌注本发明肠内营养液的有效使用时长为53-57d;接种有300CFU的白色念珠菌的硅胶胃管,灌注本发明肠内营养液的有效使用时长为49-53d。
(4)本发明的肠内营养液,在无光、密闭环境内,25℃温度条件下,静置18个月后,浓度分布均匀,无分层、无析出、无沉淀现象,长期储存性能好。
具体实施方式
为了对本发明的技术特征、目的和效果有更加清楚的理解,现说明本发明的具体实施方式。
实施例1
一种肠内营养液及其制备方法,具体为:
1、一次改性
将羧甲基壳聚糖投入至4倍重量份的过氧化氢溶液中,搅拌2h后,继续投入4倍体积的过氧化氢溶液,升温至30℃,保温搅拌10h后;调节pH至中性,获得一次改性液;搅拌条件下,以6mL/min的滴加速率,将一次改性液滴加至4倍体积的乙醇溶液中,滴加完成后,继续搅拌1h,静置30min,滤出固体物;采用3倍体积的乙醇溶液洗涤固体物2次后,转入真空度为0.01MPa环境下,升温至50℃,保温干燥至重量无变化,制得一次改性物。
其中,乙醇溶液的浓度为85%(体积百分数)。
过氧化氢溶液的浓度为2wt%。
2、二次改性
搅拌条件下,将一次改性物投入至二次改性液中,升温至30℃,保温搅拌2h后,以5mL/min的滴加速率,滴加至2倍体积的乙醇溶液中,滴加完成后,搅拌1h,静置30min,滤出固体物;采用3倍体积的乙醇溶液洗涤固体物2次后,转入真空度为0.01MPa环境下,升温至50℃,保温干燥至重量无变化,制得二次改性物。
一次改性物和二次改性液的重量份比值为5:100。
二次改性液的制备方法为,将硫酸锌、硫酸铜投入至去离子水中,完全溶解制得。二次改性液中,硫酸锌浓度为0.08mol/L,硫酸铜浓度为0.01mol/L。
乙醇溶液的浓度为85%(体积百分数)。
3、包埋
将二次改性物、三丁酸甘油酯、鱼油、红藤提取物、聚山梨酯-80投入至去离子水中,升温至30℃,保温搅拌20min,制得乳化液;将γ-环糊精和麦芽糊精投入至去离子水中,升温至50℃,保温搅拌20min,制得包埋液;将乳化液投入至2倍体积的包埋液中,超声分散30min后,置于3℃温度环境下,静置3h后,滤出固体物,在真空度为0.01MPa环境下,升温至50℃,保温干燥至重量无变化,制得包埋物。
其中,乳化液中二次改性物、三丁酸甘油酯、鱼油、红藤提取物、聚山梨酯-80、去离子水的重量份比值为2:1:3:1.5:0.1:40。
包埋液中γ-环糊精、麦芽糊精、去离子水的重量份比值为3:12:80。
超声分散的频率为20kHz,超声功率为450W。
鱼油中n-3多不饱和脂肪酸含量为50wt%。
红藤提取物的粒径规格为90目,提取比例为10:1。
4、制液
将浓缩乳清蛋白、酪蛋白酸钠、包埋物、谷氨酰胺、菜籽油、卵磷脂、营养素、矿物质、对羟基苯甲酸甲酯混合,3000rpm均质10min后,采用柠檬酸调节pH值至6.5,继续均质3min,经辐照灭菌,加去离子水稀释,制得肠内营养液。
每1000mL所述的肠内营养液中,含有浓缩乳清蛋白8g、酪蛋白酸钠8g、包埋物80g、谷氨酰胺40g、菜籽油20g、卵磷脂2g、营养素3g、矿物质1.5g、对羟基苯甲酸甲酯0.03g。
所述营养素,按重量份计,由以下成分组成:0.8份维生素A,1.5份维生素B1,1.8份维生素B2,13份维生素B3,1.8份维生素B6,0.005份维生素B12,100份维生素C,0.01份维生素D,0.02份维生素E,0.07份维生素K,8份泛酸,0.24份叶酸,0.06份生物素,110份牛磺酸。
所述矿物质,按重量份计,由以下成分组成:0.9份硫酸钠,1.6份碘化钾,0.9份磷酸钙,0.2份硫酸镁,0.02份硫酸亚铁,0.03份硫酸锰。
实施例2
一种肠内营养液及其制备方法,具体为:
1、一次改性
将羧甲基壳聚糖投入至5倍重量份的过氧化氢溶液中,搅拌3h后,继续投入5倍体积的过氧化氢溶液,升温至35℃,保温搅拌11h后;调节pH至中性,获得一次改性液;搅拌条件下,以8mL/min的滴加速率,将一次改性液滴加至5倍体积的乙醇溶液中,滴加完成后,继续搅拌2h,静置40min,滤出固体物;采用4倍体积的乙醇溶液洗涤固体物3次后,转入真空度为0.02MPa环境下,升温至55℃,保温干燥至重量无变化,制得一次改性物。
其中,乙醇溶液的浓度为90%(体积百分数)。
过氧化氢溶液的浓度为2.5wt%。
2、二次改性
搅拌条件下,将一次改性物投入至二次改性液中,升温至35℃,保温搅拌3h后,以6mL/min的滴加速率,滴加至2.5倍体积的乙醇溶液中,滴加完成后,搅拌2h,静置40min,滤出固体物;采用4倍体积的乙醇溶液洗涤固体物3次后,转入真空度为0.02MPa环境下,升温至55℃,保温干燥至重量无变化,制得二次改性物。
一次改性物和二次改性液的重量份比值为6:100。
二次改性液的制备方法为,将硫酸锌、硫酸铜投入至去离子水中,完全溶解制得。二次改性液中,硫酸锌浓度为0.09mol/L,硫酸铜浓度为0.012mol/L。
乙醇溶液的浓度为90%(体积百分数)。
3、包埋
将二次改性物、三丁酸甘油酯、鱼油、红藤提取物、聚山梨酯-80投入至去离子水中,升温至35℃,保温搅拌25min,制得乳化液;将γ-环糊精和麦芽糊精投入至去离子水中,升温至55℃,保温搅拌30min,制得包埋液;将乳化液投入至2.5倍体积的包埋液中,超声分散40min后,置于4℃温度环境下,静置4h后,滤出固体物,在真空度为0.02MPa环境下,升温至55℃,保温干燥至重量无变化,制得包埋物。
其中,乳化液中二次改性物、三丁酸甘油酯、鱼油、红藤提取物、聚山梨酯-80、去离子水的重量份比值为2.5:1.3:3.5:1.8:0.12:42。
包埋液中γ-环糊精、麦芽糊精、去离子水的重量份比值为4:15:85。
超声分散的频率为23kHz,超声功率为500W。
鱼油中n-3多不饱和脂肪酸含量为56wt%。
红藤提取物的粒径规格为95目,提取比例为15:1。
4、制液
将浓缩乳清蛋白、酪蛋白酸钠、包埋物、谷氨酰胺、菜籽油、卵磷脂、营养素、矿物质、对羟基苯甲酸甲酯混合,3500rpm均质12min后,采用柠檬酸调节pH值至6.7,继续均质4min,经辐照灭菌,加去离子水稀释,制得肠内营养液。
每1000mL所述的肠内营养液中,含有浓缩乳清蛋白10g、酪蛋白酸钠10g、包埋物85g、谷氨酰胺42g、菜籽油23g、卵磷脂2.4g、营养素3.5g、矿物质2g、对羟基苯甲酸甲酯0.035g。
所述营养素,按重量份计,由以下成分组成:0.85份维生素A,1.6份维生素B1,1.9份维生素B2,14份维生素B3,1.9份维生素B6,0.007份维生素B12,110份维生素C,0.015份维生素D,0.025份维生素E,0.075份维生素K,8.2份泛酸,0.25份叶酸,0.065份生物素,115份牛磺酸。
所述矿物质,按重量份计,由以下成分组成:1份硫酸钠,1.7份碘化钾,0.95份磷酸钙,0.22份硫酸镁,0.023份硫酸亚铁,0.032份硫酸锰。
实施例3
一种肠内营养液及其制备方法,具体为:
1、一次改性
将羧甲基壳聚糖投入至6倍重量份的过氧化氢溶液中,搅拌4h后,继续投入6倍体积的过氧化氢溶液,升温至40℃,保温搅拌12h后;调节pH至中性,获得一次改性液;搅拌条件下,以10mL/min的滴加速率,将一次改性液滴加至6倍体积的乙醇溶液中,滴加完成后,继续搅拌3h,静置60min,滤出固体物;采用5倍体积的乙醇溶液洗涤固体物3次后,转入真空度为0.03MPa环境下,升温至60℃,保温干燥至重量无变化,制得一次改性物。
其中,乙醇溶液的浓度为95%(体积百分数)。
过氧化氢溶液的浓度为3wt%。
2、二次改性
搅拌条件下,将一次改性物投入至二次改性液中,升温至40℃,保温搅拌4h后,以8mL/min的滴加速率,滴加至3倍体积的乙醇溶液中,滴加完成后,搅拌3h,静置60min,滤出固体物;采用5倍体积的乙醇溶液洗涤固体物3次后,转入真空度为0.03MPa环境下,升温至60℃,保温干燥至重量无变化,制得二次改性物。
一次改性物和二次改性液的重量份比值为7:100。
二次改性液的制备方法为,将硫酸锌、硫酸铜投入至去离子水中,完全溶解制得。二次改性液中,硫酸锌浓度为0.1mol/L,硫酸铜浓度为0.015mol/L。
乙醇溶液的浓度为95%(体积百分数)。
3、包埋
将二次改性物、三丁酸甘油酯、鱼油、红藤提取物、聚山梨酯-80投入至去离子水中,升温至40℃,保温搅拌30min,制得乳化液;将γ-环糊精和麦芽糊精投入至去离子水中,升温至60℃,保温搅拌40min,制得包埋液;将乳化液投入至3倍体积的包埋液中,超声分散50min后,置于5℃温度环境下,静置5h后,滤出固体物,在真空度为0.03MPa环境下,升温至60℃,保温干燥至重量无变化,制得包埋物。
其中,乳化液中二次改性物、三丁酸甘油酯、鱼油、红藤提取物、聚山梨酯-80、去离子水的重量份比值为3:1.5:4:2:0.15:45。
包埋液中γ-环糊精、麦芽糊精、去离子水的重量份比值为5:18:90。
超声分散的频率为25kHz,超声功率为600W。
鱼油中n-3多不饱和脂肪酸含量为60wt%。
红藤提取物的粒径规格为100目,提取比例为20:1。
4、制液
将浓缩乳清蛋白、酪蛋白酸钠、包埋物、谷氨酰胺、菜籽油、卵磷脂、营养素、矿物质、对羟基苯甲酸甲酯混合,4000rpm均质15min后,采用柠檬酸调节pH值至6.8,继续均质5min,经辐照灭菌,加去离子水稀释,制得肠内营养液。
每1000mL所述的肠内营养液中,含有浓缩乳清蛋白12g、酪蛋白酸钠12g、包埋物90g、谷氨酰胺45g、菜籽油25g、卵磷脂3g、营养素4g、矿物质2.5g、对羟基苯甲酸甲酯0.04g。
所述营养素,按重量份计,由以下成分组成:0.9份维生素A,1.8份维生素B1,2.0份维生素B2,15份维生素B3,2.0份维生素B6,0.008份维生素B12,120份维生素C,0.02份维生素D,0.03份维生素E,0.08份维生素K,8.5份泛酸,0.26份叶酸,0.07份生物素,120份牛磺酸。
所述矿物质,按重量份计,由以下成分组成:1.1份硫酸钠,1.8份碘化钾,1.0份磷酸钙,0.23份硫酸镁,0.025份硫酸亚铁,0.035份硫酸锰。
对比例1
采用实施例2的技术方案,其不同在于:1)省略第1步一次改性步骤,将羧甲基壳聚糖直接用于二次改性中;2)省略包埋步骤,将该步骤修改为,将二次改性物、三丁酸甘油酯、鱼油、红藤提取物、γ-环糊精和麦芽糊精投入至去离子水中,分散均匀,制得混合物;采用混合物替代包埋物用于制液步骤中,混合物中二次改性物、三丁酸甘油酯、鱼油、红藤提取物、γ-环糊精、麦芽糊精的总重量与制液步骤中包埋物的添加重量相同。
其中,二次改性物、三丁酸甘油酯、鱼油、红藤提取物、γ-环糊精、麦芽糊精、去离子水的重量份比值为2.5:1.3:3.5:1.8:8:30:100。
对比例2
采用实施例2的技术方案,其不同在于:1)省略第2步二次改性步骤,将一次改性物替代二次改性物,用于包埋步骤中;2)包埋步骤的乳化液中省略三丁酸甘油酯、鱼油、红藤提取物,包埋液中省略γ-环糊精。
对实施例1-3、对比例1-2的肠内营养液的肠胃刺激性进行试验,具体为:取5只体重为200-220g的健康大白鼠,分别采用实施例1-3、对比例1-2的肠内营养液对大白鼠进行灌胃,肠内营养液灌胃体积为3mL,灌胃流速为0.08mL/min,连续灌胃7天。灌胃期间观察大白鼠是否发生有胃潴留,灌胃7天结束后,对各大白鼠进行安乐死处理,切片观察各大白鼠的胃粘膜、肠粘膜情况。具体结果如下:
进一步的,分别对实施例1-3、对比例1-2的肠内营养液的抑菌性能进行试验,具体为:分别在5根硅胶胃管内接种100CFU的白色念珠菌,然后置于36.5℃温度环境下,静置6h后,分别采用实施例1-3、对比例1-2的肠内营养液灌注胃管,每天灌注三次;控制肠内营养液灌注流速为120mL/min,且每天肠内营养液灌注总流量为1600mL。记录各硅胶胃管直至发生堵塞的有效使用时长。
重复上述抑菌性能试验,区别在于,在硅胶胃管内接种300CFU黑曲霉。具体结果如下:
进一步的,分别将实施例1-3、对比例1-2的肠内营养液置于无光、密闭环境内,25℃温度条件下,静置18个月,观察各肠内营养液浓度分别情况,以及是否出现分层、析出、沉淀等现象。具体结果如下:
可以看出,本发明实施例1-3的肠内营养液,通过一次改性中,采用过氧化氢对羧甲基壳聚糖进行降解改性;然后在二次改性中,采用特定的二次改性液,对一次改性物进行二次改性;在包埋中,通过特定组成的乳化液、包埋液制备包埋物;在制液中,对特定组成的原料进行均质、灭菌、稀释处理,制得的肠内营养液对肠胃刺激性低,有效避免较高给药流速条件下,可能导致的胃潴留及其他肠胃并发症;能够有效抑制胃管内壁微生物的滋生,延长胃管的有效使用寿命;同时,有效提高肠内营养液的长期储存性能。
除非另有说明,本发明中所采用的百分数均为质量百分数。
最后应说明的是:以上所述仅为本发明的优选实施例而已,并不用于限制本发明,尽管参照前述实施例对本发明进行了详细的说明,对于本领域的技术人员来说,其依然可以对前述各实施例所记载的技术方案进行修改,或者对其中部分技术特征进行等同替换。凡在本发明的精神和原则之内,所作的任何修改、等同替换、改进等,均应包含在本发明的保护范围之内。

Claims (9)

1.一种肠内营养液的制备方法,其特征在于,所述制备方法由以下步骤组成:一次改性、二次改性、包埋、制液;
所述一次改性,将羧甲基壳聚糖投入至4-6倍重量份的过氧化氢溶液中,搅拌后,继续投入4-6倍体积的过氧化氢溶液,升温至30-40℃,保温搅拌后;调节pH至中性,获得一次改性液;搅拌条件下,将一次改性液滴加至乙醇溶液中,滴加完成后,继续搅拌,静置,滤出固体物;固体物经乙醇溶液洗涤、真空干燥,制得一次改性物;
所述二次改性,搅拌条件下,将一次改性物投入至二次改性液中,升温至30-40℃,保温搅拌后,滴加至乙醇溶液中,滴加完成后,搅拌,静置,滤出固体物;固体物经乙醇溶液洗涤、真空干燥,制得二次改性物;
所述二次改性中,二次改性液为硫酸锌、硫酸铜的去离子水溶液;
所述包埋,将二次改性物、三丁酸甘油酯、鱼油、红藤提取物、聚山梨酯-80投入至去离子水中,升温至30-40℃,保温搅拌均匀,制得乳化液;将γ-环糊精和麦芽糊精投入至去离子水中,升温至50-60℃,保温搅拌均匀,制得包埋液;将乳化液投入至包埋液中,超声分散后,置于3-5℃温度环境下,静置,滤出固体物,真空干燥,制得包埋物;
所述制液,将浓缩乳清蛋白、酪蛋白酸钠、包埋物、谷氨酰胺、菜籽油、卵磷脂、营养素、矿物质、对羟基苯甲酸甲酯混合,均质,pH值至6.5-6.8,继续均质后,经辐照灭菌,加去离子水稀释,制得肠内营养液。
2.根据权利要求1所述的肠内营养液的制备方法,其特征在于,所述一次改性中,一次改性液滴加至乙醇溶液的滴加速率为6-10mL/min。
3.根据权利要求1所述的肠内营养液的制备方法,其特征在于,所述一次改性中,乙醇溶液的体积百分浓度为85-95%;
过氧化氢溶液的浓度为2-3wt%。
4.根据权利要求1所述的肠内营养液的制备方法,其特征在于,所述二次改性中,一次改性物和二次改性液的重量份比值为5-7:100;
二次改性液中,硫酸锌浓度为0.08-0.1mol/L,硫酸铜浓度为0.01-0.015mol/L;
乙醇溶液的体积百分浓度为85-95%。
5.根据权利要求1所述的肠内营养液的制备方法,其特征在于,所述包埋中,乳化液中二次改性物、三丁酸甘油酯、鱼油、红藤提取物、聚山梨酯-80、去离子水的重量份比值为2-3:1-1.5:3-4:1.5-2:0.1-0.15:40-45;
包埋液中γ-环糊精、麦芽糊精、去离子水的重量份比值为3-5:12-18:80-90;
乳化液与包埋液的体积比为1:2-3。
6.根据权利要求1所述的肠内营养液的制备方法,其特征在于,所述包埋中,超声分散的频率为20-25kHz,超声功率为450-600W;
鱼油中n-3多不饱和脂肪酸含量为50-60wt%;
红藤提取物的粒径规格为90-100目,提取比例为10-20:1。
7.根据权利要求1所述的肠内营养液的制备方法,其特征在于,所述制液中,所述营养素,按重量份计,由以下成分组成:0.8-0.9份维生素A,1.5-1.8份维生素B1,1.8-2.0份维生素B2,13-15份维生素B3,1.8-2.0份维生素B6,0.005-0.008份维生素B12,100-120份维生素C,0.01-0.02份维生素D,0.02-0.03份维生素E,0.07-0.08份维生素K,8-8.5份泛酸,0.24-0.26份叶酸,0.06-0.07份生物素,110-120份牛磺酸。
8.根据权利要求1所述的肠内营养液的制备方法,其特征在于,所述制液中,所述矿物质,按重量份计,由以下成分组成:0.9-1.1份硫酸钠,1.6-1.8份碘化钾,0.9-1.0份磷酸钙,0.2-0.23份硫酸镁,0.02-0.025份硫酸亚铁,0.03-0.035份硫酸锰。
9.一种肠内营养液,其特征在于,采用权利要求1-8任一项所述的制备方法制得;每升所述肠内营养液中,含有浓缩乳清蛋白8-12g、酪蛋白酸钠8-12g、包埋物80-90g、谷氨酰胺40-45g、菜籽油20-25g、卵磷脂2-3g、营养素3-4g、矿物质1.5-2.5g、对羟基苯甲酸甲酯0.03-0.04g。
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